4824 lines
131 KiB
C
4824 lines
131 KiB
C
/*
|
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* tclInterp.c --
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*
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* This file implements the "interp" command which allows creation and
|
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* manipulation of Tcl interpreters from within Tcl scripts.
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*
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* Copyright (c) 1995-1997 Sun Microsystems, Inc.
|
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* Copyright (c) 2004 Donal K. Fellows
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*
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* See the file "license.terms" for information on usage and redistribution
|
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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||
*/
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#include "tclInt.h"
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/*
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* A pointer to a string that holds an initialization script that if non-NULL
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* is evaluated in Tcl_Init() prior to the built-in initialization script
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* above. This variable can be modified by the function below.
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*/
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static const char *tclPreInitScript = NULL;
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/* Forward declaration */
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struct Target;
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/*
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* struct Alias:
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*
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* Stores information about an alias. Is stored in the child interpreter and
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* used by the source command to find the target command in the parent when
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* the source command is invoked.
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*/
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typedef struct Alias {
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Tcl_Obj *token; /* Token for the alias command in the child
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* interp. This used to be the command name in
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* the child when the alias was first
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* created. */
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Tcl_Interp *targetInterp; /* Interp in which target command will be
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* invoked. */
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Tcl_Command childCmd; /* Source command in child interpreter, bound
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* to command that invokes the target command
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* in the target interpreter. */
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Tcl_HashEntry *aliasEntryPtr;
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/* Entry for the alias hash table in child.
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* This is used by alias deletion to remove
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* the alias from the child interpreter alias
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* table. */
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struct Target *targetPtr; /* Entry for target command in parent. This is
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* used in the parent interpreter to map back
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* from the target command to aliases
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* redirecting to it. */
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int objc; /* Count of Tcl_Obj in the prefix of the
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* target command to be invoked in the target
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* interpreter. Additional arguments specified
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* when calling the alias in the child interp
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* will be appended to the prefix before the
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* command is invoked. */
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Tcl_Obj *objPtr; /* The first actual prefix object - the target
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* command name; this has to be at the end of
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* the structure, which will be extended to
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* accomodate the remaining objects in the
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* prefix. */
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} Alias;
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/*
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*
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* struct Child:
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*
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* Used by the "interp" command to record and find information about child
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* interpreters. Maps from a command name in the parent to information about a
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* child interpreter, e.g. what aliases are defined in it.
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*/
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typedef struct Child {
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Tcl_Interp *parentInterp; /* Parent interpreter for this child. */
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Tcl_HashEntry *childEntryPtr;
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/* Hash entry in parents child table for this
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* child interpreter. Used to find this
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* record, and used when deleting the child
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* interpreter to delete it from the parent's
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* table. */
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Tcl_Interp *childInterp; /* The child interpreter. */
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Tcl_Command interpCmd; /* Interpreter object command. */
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Tcl_HashTable aliasTable; /* Table which maps from names of commands in
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* child interpreter to struct Alias defined
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* below. */
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} Child;
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/*
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* struct Target:
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*
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* Maps from parent interpreter commands back to the source commands in child
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* interpreters. This is needed because aliases can be created between sibling
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* interpreters and must be deleted when the target interpreter is deleted. In
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* case they would not be deleted the source interpreter would be left with a
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* "dangling pointer". One such record is stored in the Parent record of the
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* parent interpreter with the parent for each alias which directs to a
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* command in the parent. These records are used to remove the source command
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* for an from a child if/when the parent is deleted. They are organized in a
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* doubly-linked list attached to the parent interpreter.
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*/
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typedef struct Target {
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Tcl_Command childCmd; /* Command for alias in child interp. */
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Tcl_Interp *childInterp; /* Child Interpreter. */
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struct Target *nextPtr; /* Next in list of target records, or NULL if
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* at the end of the list of targets. */
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struct Target *prevPtr; /* Previous in list of target records, or NULL
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* if at the start of the list of targets. */
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} Target;
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/*
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* struct Parent:
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*
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* This record is used for two purposes: First, childTable (a hashtable) maps
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* from names of commands to child interpreters. This hashtable is used to
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* store information about child interpreters of this interpreter, to map over
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* all children, etc. The second purpose is to store information about all
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* aliases in children (or siblings) which direct to target commands in this
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* interpreter (using the targetsPtr doubly-linked list).
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*
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* NB: the flags field in the interp structure, used with SAFE_INTERP mask
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* denotes whether the interpreter is safe or not. Safe interpreters have
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* restricted functionality, can only create safe interpreters and can
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* only load safe extensions.
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*/
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typedef struct Parent {
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Tcl_HashTable childTable; /* Hash table for child interpreters. Maps
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* from command names to Child records. */
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Target *targetsPtr; /* The head of a doubly-linked list of all the
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* target records which denote aliases from
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* children or sibling interpreters that direct
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* to commands in this interpreter. This list
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* is used to remove dangling pointers from
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* the child (or sibling) interpreters when
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* this interpreter is deleted. */
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} Parent;
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/*
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* The following structure keeps track of all the Parent and Child information
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* on a per-interp basis.
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*/
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typedef struct InterpInfo {
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Parent parent; /* Keeps track of all interps for which this
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* interp is the Parent. */
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Child child; /* Information necessary for this interp to
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* function as a child. */
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} InterpInfo;
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/*
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* Limit callbacks handled by scripts are modelled as structures which are
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* stored in hashes indexed by a two-word key. Note that the type of the
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* 'type' field in the key is not int; this is to make sure that things are
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* likely to work properly on 64-bit architectures.
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*/
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typedef struct ScriptLimitCallback {
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Tcl_Interp *interp; /* The interpreter in which to execute the
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* callback. */
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Tcl_Obj *scriptObj; /* The script to execute to perform the
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* user-defined part of the callback. */
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int type; /* What kind of callback is this. */
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Tcl_HashEntry *entryPtr; /* The entry in the hash table maintained by
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* the target interpreter that refers to this
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* callback record, or NULL if the entry has
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* already been deleted from that hash
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* table. */
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} ScriptLimitCallback;
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typedef struct ScriptLimitCallbackKey {
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Tcl_Interp *interp; /* The interpreter that the limit callback was
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* attached to. This is not the interpreter
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* that the callback runs in! */
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long type; /* The type of callback that this is. */
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} ScriptLimitCallbackKey;
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/*
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* TIP#143 limit handler internal representation.
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*/
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struct LimitHandler {
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int flags; /* The state of this particular handler. */
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Tcl_LimitHandlerProc *handlerProc;
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/* The handler callback. */
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ClientData clientData; /* Opaque argument to the handler callback. */
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Tcl_LimitHandlerDeleteProc *deleteProc;
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/* How to delete the clientData. */
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LimitHandler *prevPtr; /* Previous item in linked list of
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* handlers. */
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LimitHandler *nextPtr; /* Next item in linked list of handlers. */
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};
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/*
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* Values for the LimitHandler flags field.
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* LIMIT_HANDLER_ACTIVE - Whether the handler is currently being
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* processed; handlers are never to be entered reentrantly.
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* LIMIT_HANDLER_DELETED - Whether the handler has been deleted. This
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* should not normally be observed because when a handler is
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* deleted it is also spliced out of the list of handlers, but
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* even so we will be careful.
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*/
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#define LIMIT_HANDLER_ACTIVE 0x01
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#define LIMIT_HANDLER_DELETED 0x02
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/*
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* Prototypes for local static functions:
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*/
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static int AliasCreate(Tcl_Interp *interp,
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Tcl_Interp *childInterp, Tcl_Interp *parentInterp,
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Tcl_Obj *namePtr, Tcl_Obj *targetPtr, int objc,
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Tcl_Obj *const objv[]);
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static int AliasDelete(Tcl_Interp *interp,
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Tcl_Interp *childInterp, Tcl_Obj *namePtr);
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static int AliasDescribe(Tcl_Interp *interp,
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Tcl_Interp *childInterp, Tcl_Obj *objPtr);
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static int AliasList(Tcl_Interp *interp, Tcl_Interp *childInterp);
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static int AliasObjCmd(ClientData dummy,
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Tcl_Interp *currentInterp, int objc,
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Tcl_Obj *const objv[]);
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static int AliasNRCmd(ClientData dummy,
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Tcl_Interp *currentInterp, int objc,
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Tcl_Obj *const objv[]);
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static void AliasObjCmdDeleteProc(ClientData clientData);
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static Tcl_Interp * GetInterp(Tcl_Interp *interp, Tcl_Obj *pathPtr);
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static Tcl_Interp * GetInterp2(Tcl_Interp *interp, int objc,
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Tcl_Obj *const objv[]);
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static void InterpInfoDeleteProc(ClientData clientData,
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Tcl_Interp *interp);
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static int ChildBgerror(Tcl_Interp *interp,
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Tcl_Interp *childInterp, int objc,
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Tcl_Obj *const objv[]);
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static Tcl_Interp * ChildCreate(Tcl_Interp *interp, Tcl_Obj *pathPtr,
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int safe);
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static int ChildDebugCmd(Tcl_Interp *interp,
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Tcl_Interp *childInterp,
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int objc, Tcl_Obj *const objv[]);
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static int ChildEval(Tcl_Interp *interp, Tcl_Interp *childInterp,
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int objc, Tcl_Obj *const objv[]);
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static int ChildExpose(Tcl_Interp *interp,
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Tcl_Interp *childInterp, int objc,
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Tcl_Obj *const objv[]);
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static int ChildHide(Tcl_Interp *interp, Tcl_Interp *childInterp,
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int objc, Tcl_Obj *const objv[]);
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static int ChildHidden(Tcl_Interp *interp,
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Tcl_Interp *childInterp);
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static int ChildInvokeHidden(Tcl_Interp *interp,
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Tcl_Interp *childInterp,
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const char *namespaceName,
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int objc, Tcl_Obj *const objv[]);
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static int ChildMarkTrusted(Tcl_Interp *interp,
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Tcl_Interp *childInterp);
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static int ChildObjCmd(ClientData dummy, Tcl_Interp *interp,
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int objc, Tcl_Obj *const objv[]);
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static void ChildObjCmdDeleteProc(ClientData clientData);
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static int ChildRecursionLimit(Tcl_Interp *interp,
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Tcl_Interp *childInterp, int objc,
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Tcl_Obj *const objv[]);
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static int ChildCommandLimitCmd(Tcl_Interp *interp,
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Tcl_Interp *childInterp, int consumedObjc,
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int objc, Tcl_Obj *const objv[]);
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static int ChildTimeLimitCmd(Tcl_Interp *interp,
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Tcl_Interp *childInterp, int consumedObjc,
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int objc, Tcl_Obj *const objv[]);
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static void InheritLimitsFromParent(Tcl_Interp *childInterp,
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Tcl_Interp *parentInterp);
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static void SetScriptLimitCallback(Tcl_Interp *interp, int type,
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Tcl_Interp *targetInterp, Tcl_Obj *scriptObj);
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static void CallScriptLimitCallback(ClientData clientData,
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Tcl_Interp *interp);
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static void DeleteScriptLimitCallback(ClientData clientData);
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static void RunLimitHandlers(LimitHandler *handlerPtr,
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Tcl_Interp *interp);
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static void TimeLimitCallback(ClientData clientData);
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/* NRE enabling */
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static Tcl_NRPostProc NRPostInvokeHidden;
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static Tcl_ObjCmdProc NRInterpCmd;
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static Tcl_ObjCmdProc NRChildCmd;
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/*
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*----------------------------------------------------------------------
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*
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* TclSetPreInitScript --
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*
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* This routine is used to change the value of the internal variable,
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* tclPreInitScript.
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*
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* Results:
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* Returns the current value of tclPreInitScript.
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*
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* Side effects:
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* Changes the way Tcl_Init() routine behaves.
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*
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*----------------------------------------------------------------------
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*/
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const char *
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TclSetPreInitScript(
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const char *string) /* Pointer to a script. */
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{
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const char *prevString = tclPreInitScript;
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tclPreInitScript = string;
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return(prevString);
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}
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/*
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*----------------------------------------------------------------------
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*
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* Tcl_Init --
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*
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* This function is typically invoked by Tcl_AppInit functions to find
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* and source the "init.tcl" script, which should exist somewhere on the
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* Tcl library path.
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*
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* Results:
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* Returns a standard Tcl completion code and sets the interp's result if
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* there is an error.
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*
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* Side effects:
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* Depends on what's in the init.tcl script.
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*
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*----------------------------------------------------------------------
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*/
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int
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Tcl_Init(
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Tcl_Interp *interp) /* Interpreter to initialize. */
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{
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if (tclPreInitScript != NULL) {
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if (Tcl_Eval(interp, tclPreInitScript) == TCL_ERROR) {
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return TCL_ERROR;
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}
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}
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/*
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* In order to find init.tcl during initialization, the following script
|
||
* is invoked by Tcl_Init(). It looks in several different directories:
|
||
*
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* $tcl_library - can specify a primary location, if set, no
|
||
* other locations will be checked. This is the
|
||
* recommended way for a program that embeds
|
||
* Tcl to specifically tell Tcl where to find
|
||
* an init.tcl file.
|
||
*
|
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* $env(TCL_LIBRARY) - highest priority so user can always override
|
||
* the search path unless the application has
|
||
* specified an exact directory above
|
||
*
|
||
* $tclDefaultLibrary - INTERNAL: This variable is set by Tcl on
|
||
* those platforms where it can determine at
|
||
* runtime the directory where it expects the
|
||
* init.tcl file to be. After [tclInit] reads
|
||
* and uses this value, it [unset]s it.
|
||
* External users of Tcl should not make use of
|
||
* the variable to customize [tclInit].
|
||
*
|
||
* $tcl_libPath - OBSOLETE: This variable is no longer set by
|
||
* Tcl itself, but [tclInit] examines it in
|
||
* case some program that embeds Tcl is
|
||
* customizing [tclInit] by setting this
|
||
* variable to a list of directories in which
|
||
* to search.
|
||
*
|
||
* [tcl::pkgconfig get scriptdir,runtime]
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||
* - the directory determined by configure to be
|
||
* the place where Tcl's script library is to
|
||
* be installed.
|
||
*
|
||
* The first directory on this path that contains a valid init.tcl script
|
||
* will be set as the value of tcl_library.
|
||
*
|
||
* Note that this entire search mechanism can be bypassed by defining an
|
||
* alternate tclInit command before calling Tcl_Init().
|
||
*/
|
||
|
||
return Tcl_Eval(interp,
|
||
"if {[namespace which -command tclInit] eq \"\"} {\n"
|
||
" proc tclInit {} {\n"
|
||
" global tcl_libPath tcl_library env tclDefaultLibrary\n"
|
||
" rename tclInit {}\n"
|
||
" if {[info exists tcl_library]} {\n"
|
||
" set scripts {{set tcl_library}}\n"
|
||
" } else {\n"
|
||
" set scripts {}\n"
|
||
" if {[info exists env(TCL_LIBRARY)] && ($env(TCL_LIBRARY) ne {})} {\n"
|
||
" lappend scripts {set env(TCL_LIBRARY)}\n"
|
||
" lappend scripts {\n"
|
||
"if {[regexp ^tcl(.*)$ [file tail $env(TCL_LIBRARY)] -> tail] == 0} continue\n"
|
||
"if {$tail eq [info tclversion]} continue\n"
|
||
"file join [file dirname $env(TCL_LIBRARY)] tcl[info tclversion]}\n"
|
||
" }\n"
|
||
" if {[info exists tclDefaultLibrary]} {\n"
|
||
" lappend scripts {set tclDefaultLibrary}\n"
|
||
" } else {\n"
|
||
" lappend scripts {::tcl::pkgconfig get scriptdir,runtime}\n"
|
||
" }\n"
|
||
" lappend scripts {\n"
|
||
"set parentDir [file dirname [file dirname [info nameofexecutable]]]\n"
|
||
"set grandParentDir [file dirname $parentDir]\n"
|
||
"file join $parentDir lib tcl[info tclversion]} \\\n"
|
||
" {file join $grandParentDir lib tcl[info tclversion]} \\\n"
|
||
" {file join $parentDir library} \\\n"
|
||
" {file join $grandParentDir library} \\\n"
|
||
" {file join $grandParentDir tcl[info patchlevel] library} \\\n"
|
||
" {\n"
|
||
"file join [file dirname $grandParentDir] tcl[info patchlevel] library}\n"
|
||
" if {[info exists tcl_libPath]\n"
|
||
" && [catch {llength $tcl_libPath} len] == 0} {\n"
|
||
" for {set i 0} {$i < $len} {incr i} {\n"
|
||
" lappend scripts [list lindex \\$tcl_libPath $i]\n"
|
||
" }\n"
|
||
" }\n"
|
||
" }\n"
|
||
" set dirs {}\n"
|
||
" set errors {}\n"
|
||
" foreach script $scripts {\n"
|
||
" lappend dirs [eval $script]\n"
|
||
" set tcl_library [lindex $dirs end]\n"
|
||
" set tclfile [file join $tcl_library init.tcl]\n"
|
||
" if {[file exists $tclfile]} {\n"
|
||
" if {[catch {uplevel #0 [list source $tclfile]} msg opts]} {\n"
|
||
" append errors \"$tclfile: $msg\n\"\n"
|
||
" append errors \"[dict get $opts -errorinfo]\n\"\n"
|
||
" continue\n"
|
||
" }\n"
|
||
" unset -nocomplain tclDefaultLibrary\n"
|
||
" return\n"
|
||
" }\n"
|
||
" }\n"
|
||
" unset -nocomplain tclDefaultLibrary\n"
|
||
" set msg \"Can't find a usable init.tcl in the following directories: \n\"\n"
|
||
" append msg \" $dirs\n\n\"\n"
|
||
" append msg \"$errors\n\n\"\n"
|
||
" append msg \"This probably means that Tcl wasn't installed properly.\n\"\n"
|
||
" error $msg\n"
|
||
" }\n"
|
||
"}\n"
|
||
"tclInit");
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* TclInterpInit --
|
||
*
|
||
* Initializes the invoking interpreter for using the parent, child and
|
||
* safe interp facilities. This is called from inside Tcl_CreateInterp().
|
||
*
|
||
* Results:
|
||
* Always returns TCL_OK for backwards compatibility.
|
||
*
|
||
* Side effects:
|
||
* Adds the "interp" command to an interpreter and initializes the
|
||
* interpInfoPtr field of the invoking interpreter.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
TclInterpInit(
|
||
Tcl_Interp *interp) /* Interpreter to initialize. */
|
||
{
|
||
InterpInfo *interpInfoPtr;
|
||
Parent *parentPtr;
|
||
Child *childPtr;
|
||
|
||
interpInfoPtr = ckalloc(sizeof(InterpInfo));
|
||
((Interp *) interp)->interpInfo = interpInfoPtr;
|
||
|
||
parentPtr = &interpInfoPtr->parent;
|
||
Tcl_InitHashTable(&parentPtr->childTable, TCL_STRING_KEYS);
|
||
parentPtr->targetsPtr = NULL;
|
||
|
||
childPtr = &interpInfoPtr->child;
|
||
childPtr->parentInterp = NULL;
|
||
childPtr->childEntryPtr = NULL;
|
||
childPtr->childInterp = interp;
|
||
childPtr->interpCmd = NULL;
|
||
Tcl_InitHashTable(&childPtr->aliasTable, TCL_STRING_KEYS);
|
||
|
||
Tcl_NRCreateCommand(interp, "interp", Tcl_InterpObjCmd, NRInterpCmd,
|
||
NULL, NULL);
|
||
|
||
Tcl_CallWhenDeleted(interp, InterpInfoDeleteProc, NULL);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* InterpInfoDeleteProc --
|
||
*
|
||
* Invoked when an interpreter is being deleted. It releases all storage
|
||
* used by the parent/child/safe interpreter facilities.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Cleans up storage. Sets the interpInfoPtr field of the interp to NULL.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
InterpInfoDeleteProc(
|
||
ClientData clientData, /* Ignored. */
|
||
Tcl_Interp *interp) /* Interp being deleted. All commands for
|
||
* child interps should already be deleted. */
|
||
{
|
||
InterpInfo *interpInfoPtr;
|
||
Child *childPtr;
|
||
Parent *parentPtr;
|
||
Target *targetPtr;
|
||
|
||
interpInfoPtr = (InterpInfo *) ((Interp *) interp)->interpInfo;
|
||
|
||
/*
|
||
* There shouldn't be any commands left.
|
||
*/
|
||
|
||
parentPtr = &interpInfoPtr->parent;
|
||
if (parentPtr->childTable.numEntries != 0) {
|
||
Tcl_Panic("InterpInfoDeleteProc: still exist commands");
|
||
}
|
||
Tcl_DeleteHashTable(&parentPtr->childTable);
|
||
|
||
/*
|
||
* Tell any interps that have aliases to this interp that they should
|
||
* delete those aliases. If the other interp was already dead, it would
|
||
* have removed the target record already.
|
||
*/
|
||
|
||
for (targetPtr = parentPtr->targetsPtr; targetPtr != NULL; ) {
|
||
Target *tmpPtr = targetPtr->nextPtr;
|
||
Tcl_DeleteCommandFromToken(targetPtr->childInterp,
|
||
targetPtr->childCmd);
|
||
targetPtr = tmpPtr;
|
||
}
|
||
|
||
childPtr = &interpInfoPtr->child;
|
||
if (childPtr->interpCmd != NULL) {
|
||
/*
|
||
* Tcl_DeleteInterp() was called on this interpreter, rather "interp
|
||
* delete" or the equivalent deletion of the command in the parent.
|
||
* First ensure that the cleanup callback doesn't try to delete the
|
||
* interp again.
|
||
*/
|
||
|
||
childPtr->childInterp = NULL;
|
||
Tcl_DeleteCommandFromToken(childPtr->parentInterp,
|
||
childPtr->interpCmd);
|
||
}
|
||
|
||
/*
|
||
* There shouldn't be any aliases left.
|
||
*/
|
||
|
||
if (childPtr->aliasTable.numEntries != 0) {
|
||
Tcl_Panic("InterpInfoDeleteProc: still exist aliases");
|
||
}
|
||
Tcl_DeleteHashTable(&childPtr->aliasTable);
|
||
|
||
ckfree(interpInfoPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_InterpObjCmd --
|
||
*
|
||
* This function is invoked to process the "interp" Tcl command. See the
|
||
* user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* See the user documentation.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_InterpObjCmd(
|
||
ClientData clientData, /* Unused. */
|
||
Tcl_Interp *interp, /* Current interpreter. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument objects. */
|
||
{
|
||
return Tcl_NRCallObjProc(interp, NRInterpCmd, clientData, objc, objv);
|
||
}
|
||
|
||
static int
|
||
NRInterpCmd(
|
||
ClientData clientData, /* Unused. */
|
||
Tcl_Interp *interp, /* Current interpreter. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument objects. */
|
||
{
|
||
Tcl_Interp *childInterp;
|
||
int index;
|
||
static const char *const options[] = {
|
||
"alias", "aliases", "bgerror", "cancel",
|
||
"children", "create", "debug", "delete",
|
||
"eval", "exists", "expose",
|
||
"hide", "hidden", "issafe",
|
||
"invokehidden", "limit", "marktrusted", "recursionlimit",
|
||
"slaves", "share", "target", "transfer",
|
||
NULL
|
||
};
|
||
enum option {
|
||
OPT_ALIAS, OPT_ALIASES, OPT_BGERROR, OPT_CANCEL,
|
||
OPT_CHILDREN, OPT_CREATE, OPT_DEBUG, OPT_DELETE,
|
||
OPT_EVAL, OPT_EXISTS, OPT_EXPOSE,
|
||
OPT_HIDE, OPT_HIDDEN, OPT_ISSAFE,
|
||
OPT_INVOKEHID, OPT_LIMIT, OPT_MARKTRUSTED,OPT_RECLIMIT,
|
||
OPT_SLAVES, OPT_SHARE, OPT_TARGET, OPT_TRANSFER
|
||
};
|
||
|
||
if (objc < 2) {
|
||
Tcl_WrongNumArgs(interp, 1, objv, "cmd ?arg ...?");
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_GetIndexFromObj(interp, objv[1], options, "option", 0,
|
||
&index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
switch ((enum option) index) {
|
||
case OPT_ALIAS: {
|
||
Tcl_Interp *parentInterp;
|
||
|
||
if (objc < 4) {
|
||
aliasArgs:
|
||
Tcl_WrongNumArgs(interp, 2, objv,
|
||
"slavePath slaveCmd ?masterPath masterCmd? ?arg ...?");
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (objc == 4) {
|
||
return AliasDescribe(interp, childInterp, objv[3]);
|
||
}
|
||
if ((objc == 5) && (TclGetString(objv[4])[0] == '\0')) {
|
||
return AliasDelete(interp, childInterp, objv[3]);
|
||
}
|
||
if (objc > 5) {
|
||
parentInterp = GetInterp(interp, objv[4]);
|
||
if (parentInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
return AliasCreate(interp, childInterp, parentInterp, objv[3],
|
||
objv[5], objc - 6, objv + 6);
|
||
}
|
||
goto aliasArgs;
|
||
}
|
||
case OPT_ALIASES:
|
||
childInterp = GetInterp2(interp, objc, objv);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return AliasList(interp, childInterp);
|
||
case OPT_BGERROR:
|
||
if (objc != 3 && objc != 4) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "path ?cmdPrefix?");
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildBgerror(interp, childInterp, objc - 3, objv + 3);
|
||
case OPT_CANCEL: {
|
||
int i, flags;
|
||
Tcl_Obj *resultObjPtr;
|
||
static const char *const cancelOptions[] = {
|
||
"-unwind", "--", NULL
|
||
};
|
||
enum option {
|
||
OPT_UNWIND, OPT_LAST
|
||
};
|
||
|
||
flags = 0;
|
||
|
||
for (i = 2; i < objc; i++) {
|
||
if (TclGetString(objv[i])[0] != '-') {
|
||
break;
|
||
}
|
||
if (Tcl_GetIndexFromObj(interp, objv[i], cancelOptions, "option",
|
||
0, &index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
switch ((enum option) index) {
|
||
case OPT_UNWIND:
|
||
/*
|
||
* The evaluation stack in the target interp is to be unwound.
|
||
*/
|
||
|
||
flags |= TCL_CANCEL_UNWIND;
|
||
break;
|
||
case OPT_LAST:
|
||
i++;
|
||
goto endOfForLoop;
|
||
}
|
||
}
|
||
|
||
endOfForLoop:
|
||
if (i < objc - 2) {
|
||
Tcl_WrongNumArgs(interp, 2, objv,
|
||
"?-unwind? ?--? ?path? ?result?");
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Did they specify a child interp to cancel the script in progress
|
||
* in? If not, use the current interp.
|
||
*/
|
||
|
||
if (i < objc) {
|
||
childInterp = GetInterp(interp, objv[i]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
i++;
|
||
} else {
|
||
childInterp = interp;
|
||
}
|
||
|
||
if (i < objc) {
|
||
resultObjPtr = objv[i];
|
||
|
||
/*
|
||
* Tcl_CancelEval removes this reference.
|
||
*/
|
||
|
||
Tcl_IncrRefCount(resultObjPtr);
|
||
i++;
|
||
} else {
|
||
resultObjPtr = NULL;
|
||
}
|
||
|
||
return Tcl_CancelEval(childInterp, resultObjPtr, 0, flags);
|
||
}
|
||
case OPT_CREATE: {
|
||
int i, last, safe;
|
||
Tcl_Obj *childPtr;
|
||
char buf[16 + TCL_INTEGER_SPACE];
|
||
static const char *const createOptions[] = {
|
||
"-safe", "--", NULL
|
||
};
|
||
enum option {
|
||
OPT_SAFE, OPT_LAST
|
||
};
|
||
|
||
safe = Tcl_IsSafe(interp);
|
||
|
||
/*
|
||
* Weird historical rules: "-safe" is accepted at the end, too.
|
||
*/
|
||
|
||
childPtr = NULL;
|
||
last = 0;
|
||
for (i = 2; i < objc; i++) {
|
||
if ((last == 0) && (Tcl_GetString(objv[i])[0] == '-')) {
|
||
if (Tcl_GetIndexFromObj(interp, objv[i], createOptions,
|
||
"option", 0, &index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (index == OPT_SAFE) {
|
||
safe = 1;
|
||
continue;
|
||
}
|
||
i++;
|
||
last = 1;
|
||
}
|
||
if (childPtr != NULL) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "?-safe? ?--? ?path?");
|
||
return TCL_ERROR;
|
||
}
|
||
if (i < objc) {
|
||
childPtr = objv[i];
|
||
}
|
||
}
|
||
buf[0] = '\0';
|
||
if (childPtr == NULL) {
|
||
/*
|
||
* Create an anonymous interpreter -- we choose its name and the
|
||
* name of the command. We check that the command name that we use
|
||
* for the interpreter does not collide with an existing command
|
||
* in the parent interpreter.
|
||
*/
|
||
|
||
for (i = 0; ; i++) {
|
||
Tcl_CmdInfo cmdInfo;
|
||
|
||
sprintf(buf, "interp%d", i);
|
||
if (Tcl_GetCommandInfo(interp, buf, &cmdInfo) == 0) {
|
||
break;
|
||
}
|
||
}
|
||
childPtr = Tcl_NewStringObj(buf, -1);
|
||
}
|
||
if (ChildCreate(interp, childPtr, safe) == NULL) {
|
||
if (buf[0] != '\0') {
|
||
Tcl_DecrRefCount(childPtr);
|
||
}
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_SetObjResult(interp, childPtr);
|
||
return TCL_OK;
|
||
}
|
||
case OPT_DEBUG: /* TIP #378 */
|
||
/*
|
||
* Currently only -frame supported, otherwise ?-option ?value??
|
||
*/
|
||
|
||
if (objc < 3 || objc > 5) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "path ?-frame ?bool??");
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildDebugCmd(interp, childInterp, objc - 3, objv + 3);
|
||
case OPT_DELETE: {
|
||
int i;
|
||
InterpInfo *iiPtr;
|
||
|
||
for (i = 2; i < objc; i++) {
|
||
childInterp = GetInterp(interp, objv[i]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
} else if (childInterp == interp) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"cannot delete the current interpreter", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"DELETESELF", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
iiPtr = (InterpInfo *) ((Interp *) childInterp)->interpInfo;
|
||
Tcl_DeleteCommandFromToken(iiPtr->child.parentInterp,
|
||
iiPtr->child.interpCmd);
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
case OPT_EVAL:
|
||
if (objc < 4) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "path arg ?arg ...?");
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildEval(interp, childInterp, objc - 3, objv + 3);
|
||
case OPT_EXISTS: {
|
||
int exists = 1;
|
||
|
||
childInterp = GetInterp2(interp, objc, objv);
|
||
if (childInterp == NULL) {
|
||
if (objc > 3) {
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_ResetResult(interp);
|
||
exists = 0;
|
||
}
|
||
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(exists));
|
||
return TCL_OK;
|
||
}
|
||
case OPT_EXPOSE:
|
||
if ((objc < 4) || (objc > 5)) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "path hiddenCmdName ?cmdName?");
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildExpose(interp, childInterp, objc - 3, objv + 3);
|
||
case OPT_HIDE:
|
||
if ((objc < 4) || (objc > 5)) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "path cmdName ?hiddenCmdName?");
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildHide(interp, childInterp, objc - 3, objv + 3);
|
||
case OPT_HIDDEN:
|
||
childInterp = GetInterp2(interp, objc, objv);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildHidden(interp, childInterp);
|
||
case OPT_ISSAFE:
|
||
childInterp = GetInterp2(interp, objc, objv);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(Tcl_IsSafe(childInterp)));
|
||
return TCL_OK;
|
||
case OPT_INVOKEHID: {
|
||
int i;
|
||
const char *namespaceName;
|
||
static const char *const hiddenOptions[] = {
|
||
"-global", "-namespace", "--", NULL
|
||
};
|
||
enum hiddenOption {
|
||
OPT_GLOBAL, OPT_NAMESPACE, OPT_LAST
|
||
};
|
||
|
||
namespaceName = NULL;
|
||
for (i = 3; i < objc; i++) {
|
||
if (TclGetString(objv[i])[0] != '-') {
|
||
break;
|
||
}
|
||
if (Tcl_GetIndexFromObj(interp, objv[i], hiddenOptions, "option",
|
||
0, &index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (index == OPT_GLOBAL) {
|
||
namespaceName = "::";
|
||
} else if (index == OPT_NAMESPACE) {
|
||
if (++i == objc) { /* There must be more arguments. */
|
||
break;
|
||
} else {
|
||
namespaceName = TclGetString(objv[i]);
|
||
}
|
||
} else {
|
||
i++;
|
||
break;
|
||
}
|
||
}
|
||
if (objc - i < 1) {
|
||
Tcl_WrongNumArgs(interp, 2, objv,
|
||
"path ?-namespace ns? ?-global? ?--? cmd ?arg ..?");
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildInvokeHidden(interp, childInterp, namespaceName, objc - i,
|
||
objv + i);
|
||
}
|
||
case OPT_LIMIT: {
|
||
static const char *const limitTypes[] = {
|
||
"commands", "time", NULL
|
||
};
|
||
enum LimitTypes {
|
||
LIMIT_TYPE_COMMANDS, LIMIT_TYPE_TIME
|
||
};
|
||
int limitType;
|
||
|
||
if (objc < 4) {
|
||
Tcl_WrongNumArgs(interp, 2, objv,
|
||
"path limitType ?-option value ...?");
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_GetIndexFromObj(interp, objv[3], limitTypes, "limit type", 0,
|
||
&limitType) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
switch ((enum LimitTypes) limitType) {
|
||
case LIMIT_TYPE_COMMANDS:
|
||
return ChildCommandLimitCmd(interp, childInterp, 4, objc,objv);
|
||
case LIMIT_TYPE_TIME:
|
||
return ChildTimeLimitCmd(interp, childInterp, 4, objc, objv);
|
||
}
|
||
}
|
||
break;
|
||
case OPT_MARKTRUSTED:
|
||
if (objc != 3) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "path");
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildMarkTrusted(interp, childInterp);
|
||
case OPT_RECLIMIT:
|
||
if (objc != 3 && objc != 4) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "path ?newlimit?");
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildRecursionLimit(interp, childInterp, objc - 3, objv + 3);
|
||
case OPT_CHILDREN:
|
||
case OPT_SLAVES: {
|
||
InterpInfo *iiPtr;
|
||
Tcl_Obj *resultPtr;
|
||
Tcl_HashEntry *hPtr;
|
||
Tcl_HashSearch hashSearch;
|
||
char *string;
|
||
|
||
childInterp = GetInterp2(interp, objc, objv);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
iiPtr = (InterpInfo *) ((Interp *) childInterp)->interpInfo;
|
||
resultPtr = Tcl_NewObj();
|
||
hPtr = Tcl_FirstHashEntry(&iiPtr->parent.childTable, &hashSearch);
|
||
for ( ; hPtr != NULL; hPtr = Tcl_NextHashEntry(&hashSearch)) {
|
||
string = Tcl_GetHashKey(&iiPtr->parent.childTable, hPtr);
|
||
Tcl_ListObjAppendElement(NULL, resultPtr,
|
||
Tcl_NewStringObj(string, -1));
|
||
}
|
||
Tcl_SetObjResult(interp, resultPtr);
|
||
return TCL_OK;
|
||
}
|
||
case OPT_TRANSFER:
|
||
case OPT_SHARE: {
|
||
Tcl_Interp *parentInterp; /* The parent of the child. */
|
||
Tcl_Channel chan;
|
||
|
||
if (objc != 5) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "srcPath channelId destPath");
|
||
return TCL_ERROR;
|
||
}
|
||
parentInterp = GetInterp(interp, objv[2]);
|
||
if (parentInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
chan = Tcl_GetChannel(parentInterp, TclGetString(objv[3]), NULL);
|
||
if (chan == NULL) {
|
||
Tcl_TransferResult(parentInterp, TCL_OK, interp);
|
||
return TCL_ERROR;
|
||
}
|
||
childInterp = GetInterp(interp, objv[4]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_RegisterChannel(childInterp, chan);
|
||
if (index == OPT_TRANSFER) {
|
||
/*
|
||
* When transferring, as opposed to sharing, we must unhitch the
|
||
* channel from the interpreter where it started.
|
||
*/
|
||
|
||
if (Tcl_UnregisterChannel(parentInterp, chan) != TCL_OK) {
|
||
Tcl_TransferResult(parentInterp, TCL_OK, interp);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
case OPT_TARGET: {
|
||
InterpInfo *iiPtr;
|
||
Tcl_HashEntry *hPtr;
|
||
Alias *aliasPtr;
|
||
const char *aliasName;
|
||
|
||
if (objc != 4) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "path alias");
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
childInterp = GetInterp(interp, objv[2]);
|
||
if (childInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
aliasName = TclGetString(objv[3]);
|
||
|
||
iiPtr = (InterpInfo *) ((Interp *) childInterp)->interpInfo;
|
||
hPtr = Tcl_FindHashEntry(&iiPtr->child.aliasTable, aliasName);
|
||
if (hPtr == NULL) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"alias \"%s\" in path \"%s\" not found",
|
||
aliasName, Tcl_GetString(objv[2])));
|
||
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ALIAS", aliasName,
|
||
NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
aliasPtr = Tcl_GetHashValue(hPtr);
|
||
if (Tcl_GetInterpPath(interp, aliasPtr->targetInterp) != TCL_OK) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"target interpreter for alias \"%s\" in path \"%s\" is "
|
||
"not my descendant", aliasName, Tcl_GetString(objv[2])));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"TARGETSHROUDED", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*---------------------------------------------------------------------------
|
||
*
|
||
* GetInterp2 --
|
||
*
|
||
* Helper function for Tcl_InterpObjCmd() to convert the interp name
|
||
* potentially specified on the command line to an Tcl_Interp.
|
||
*
|
||
* Results:
|
||
* The return value is the interp specified on the command line, or the
|
||
* interp argument itself if no interp was specified on the command line.
|
||
* If the interp could not be found or the wrong number of arguments was
|
||
* specified on the command line, the return value is NULL and an error
|
||
* message is left in the interp's result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*---------------------------------------------------------------------------
|
||
*/
|
||
|
||
static Tcl_Interp *
|
||
GetInterp2(
|
||
Tcl_Interp *interp, /* Default interp if no interp was specified
|
||
* on the command line. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument objects. */
|
||
{
|
||
if (objc == 2) {
|
||
return interp;
|
||
} else if (objc == 3) {
|
||
return GetInterp(interp, objv[2]);
|
||
} else {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "?path?");
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_CreateAlias --
|
||
*
|
||
* Creates an alias between two interpreters.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Creates a new alias, manipulates the result field of childInterp.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_CreateAlias(
|
||
Tcl_Interp *childInterp, /* Interpreter for source command. */
|
||
const char *childCmd, /* Command to install in child. */
|
||
Tcl_Interp *targetInterp, /* Interpreter for target command. */
|
||
const char *targetCmd, /* Name of target command. */
|
||
int argc, /* How many additional arguments? */
|
||
const char *const *argv) /* These are the additional args. */
|
||
{
|
||
Tcl_Obj *childObjPtr, *targetObjPtr;
|
||
Tcl_Obj **objv;
|
||
int i;
|
||
int result;
|
||
|
||
objv = TclStackAlloc(childInterp, (unsigned) sizeof(Tcl_Obj *) * argc);
|
||
for (i = 0; i < argc; i++) {
|
||
objv[i] = Tcl_NewStringObj(argv[i], -1);
|
||
Tcl_IncrRefCount(objv[i]);
|
||
}
|
||
|
||
childObjPtr = Tcl_NewStringObj(childCmd, -1);
|
||
Tcl_IncrRefCount(childObjPtr);
|
||
|
||
targetObjPtr = Tcl_NewStringObj(targetCmd, -1);
|
||
Tcl_IncrRefCount(targetObjPtr);
|
||
|
||
result = AliasCreate(childInterp, childInterp, targetInterp, childObjPtr,
|
||
targetObjPtr, argc, objv);
|
||
|
||
for (i = 0; i < argc; i++) {
|
||
Tcl_DecrRefCount(objv[i]);
|
||
}
|
||
TclStackFree(childInterp, objv);
|
||
Tcl_DecrRefCount(targetObjPtr);
|
||
Tcl_DecrRefCount(childObjPtr);
|
||
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_CreateAliasObj --
|
||
*
|
||
* Object version: Creates an alias between two interpreters.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Creates a new alias.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_CreateAliasObj(
|
||
Tcl_Interp *childInterp, /* Interpreter for source command. */
|
||
const char *childCmd, /* Command to install in child. */
|
||
Tcl_Interp *targetInterp, /* Interpreter for target command. */
|
||
const char *targetCmd, /* Name of target command. */
|
||
int objc, /* How many additional arguments? */
|
||
Tcl_Obj *const objv[]) /* Argument vector. */
|
||
{
|
||
Tcl_Obj *childObjPtr, *targetObjPtr;
|
||
int result;
|
||
|
||
childObjPtr = Tcl_NewStringObj(childCmd, -1);
|
||
Tcl_IncrRefCount(childObjPtr);
|
||
|
||
targetObjPtr = Tcl_NewStringObj(targetCmd, -1);
|
||
Tcl_IncrRefCount(targetObjPtr);
|
||
|
||
result = AliasCreate(childInterp, childInterp, targetInterp, childObjPtr,
|
||
targetObjPtr, objc, objv);
|
||
|
||
Tcl_DecrRefCount(childObjPtr);
|
||
Tcl_DecrRefCount(targetObjPtr);
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetAlias --
|
||
*
|
||
* Gets information about an alias.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_GetAlias(
|
||
Tcl_Interp *interp, /* Interp to start search from. */
|
||
const char *aliasName, /* Name of alias to find. */
|
||
Tcl_Interp **targetInterpPtr,
|
||
/* (Return) target interpreter. */
|
||
const char **targetNamePtr, /* (Return) name of target command. */
|
||
int *argcPtr, /* (Return) count of addnl args. */
|
||
const char ***argvPtr) /* (Return) additional arguments. */
|
||
{
|
||
InterpInfo *iiPtr = (InterpInfo *) ((Interp *) interp)->interpInfo;
|
||
Tcl_HashEntry *hPtr;
|
||
Alias *aliasPtr;
|
||
int i, objc;
|
||
Tcl_Obj **objv;
|
||
|
||
hPtr = Tcl_FindHashEntry(&iiPtr->child.aliasTable, aliasName);
|
||
if (hPtr == NULL) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"alias \"%s\" not found", aliasName));
|
||
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ALIAS", aliasName, NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
aliasPtr = Tcl_GetHashValue(hPtr);
|
||
objc = aliasPtr->objc;
|
||
objv = &aliasPtr->objPtr;
|
||
|
||
if (targetInterpPtr != NULL) {
|
||
*targetInterpPtr = aliasPtr->targetInterp;
|
||
}
|
||
if (targetNamePtr != NULL) {
|
||
*targetNamePtr = TclGetString(objv[0]);
|
||
}
|
||
if (argcPtr != NULL) {
|
||
*argcPtr = objc - 1;
|
||
}
|
||
if (argvPtr != NULL) {
|
||
*argvPtr = (const char **)
|
||
ckalloc(sizeof(const char *) * (objc - 1));
|
||
for (i = 1; i < objc; i++) {
|
||
(*argvPtr)[i - 1] = TclGetString(objv[i]);
|
||
}
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetAliasObj --
|
||
*
|
||
* Object version: Gets information about an alias.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_GetAliasObj(
|
||
Tcl_Interp *interp, /* Interp to start search from. */
|
||
const char *aliasName, /* Name of alias to find. */
|
||
Tcl_Interp **targetInterpPtr,
|
||
/* (Return) target interpreter. */
|
||
const char **targetNamePtr, /* (Return) name of target command. */
|
||
int *objcPtr, /* (Return) count of addnl args. */
|
||
Tcl_Obj ***objvPtr) /* (Return) additional args. */
|
||
{
|
||
InterpInfo *iiPtr = (InterpInfo *) ((Interp *) interp)->interpInfo;
|
||
Tcl_HashEntry *hPtr;
|
||
Alias *aliasPtr;
|
||
int objc;
|
||
Tcl_Obj **objv;
|
||
|
||
hPtr = Tcl_FindHashEntry(&iiPtr->child.aliasTable, aliasName);
|
||
if (hPtr == NULL) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"alias \"%s\" not found", aliasName));
|
||
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ALIAS", aliasName, NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
aliasPtr = Tcl_GetHashValue(hPtr);
|
||
objc = aliasPtr->objc;
|
||
objv = &aliasPtr->objPtr;
|
||
|
||
if (targetInterpPtr != NULL) {
|
||
*targetInterpPtr = aliasPtr->targetInterp;
|
||
}
|
||
if (targetNamePtr != NULL) {
|
||
*targetNamePtr = TclGetString(objv[0]);
|
||
}
|
||
if (objcPtr != NULL) {
|
||
*objcPtr = objc - 1;
|
||
}
|
||
if (objvPtr != NULL) {
|
||
*objvPtr = objv + 1;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclPreventAliasLoop --
|
||
*
|
||
* When defining an alias or renaming a command, prevent an alias loop
|
||
* from being formed.
|
||
*
|
||
* Results:
|
||
* A standard Tcl object result.
|
||
*
|
||
* Side effects:
|
||
* If TCL_ERROR is returned, the function also stores an error message in
|
||
* the interpreter's result object.
|
||
*
|
||
* NOTE:
|
||
* This function is public internal (instead of being static to this
|
||
* file) because it is also used from TclRenameCommand.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
TclPreventAliasLoop(
|
||
Tcl_Interp *interp, /* Interp in which to report errors. */
|
||
Tcl_Interp *cmdInterp, /* Interp in which the command is being
|
||
* defined. */
|
||
Tcl_Command cmd) /* Tcl command we are attempting to define. */
|
||
{
|
||
Command *cmdPtr = (Command *) cmd;
|
||
Alias *aliasPtr, *nextAliasPtr;
|
||
Tcl_Command aliasCmd;
|
||
Command *aliasCmdPtr;
|
||
|
||
/*
|
||
* If we are not creating or renaming an alias, then it is always OK to
|
||
* create or rename the command.
|
||
*/
|
||
|
||
if (cmdPtr->objProc != AliasObjCmd) {
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
* OK, we are dealing with an alias, so traverse the chain of aliases. If
|
||
* we encounter the alias we are defining (or renaming to) any in the
|
||
* chain then we have a loop.
|
||
*/
|
||
|
||
aliasPtr = cmdPtr->objClientData;
|
||
nextAliasPtr = aliasPtr;
|
||
while (1) {
|
||
Tcl_Obj *cmdNamePtr;
|
||
|
||
/*
|
||
* If the target of the next alias in the chain is the same as the
|
||
* source alias, we have a loop.
|
||
*/
|
||
|
||
if (Tcl_InterpDeleted(nextAliasPtr->targetInterp)) {
|
||
/*
|
||
* The child interpreter can be deleted while creating the alias.
|
||
* [Bug #641195]
|
||
*/
|
||
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"cannot define or rename alias \"%s\": interpreter deleted",
|
||
Tcl_GetCommandName(cmdInterp, cmd)));
|
||
return TCL_ERROR;
|
||
}
|
||
cmdNamePtr = nextAliasPtr->objPtr;
|
||
aliasCmd = Tcl_FindCommand(nextAliasPtr->targetInterp,
|
||
TclGetString(cmdNamePtr),
|
||
Tcl_GetGlobalNamespace(nextAliasPtr->targetInterp),
|
||
/*flags*/ 0);
|
||
if (aliasCmd == NULL) {
|
||
return TCL_OK;
|
||
}
|
||
aliasCmdPtr = (Command *) aliasCmd;
|
||
if (aliasCmdPtr == cmdPtr) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"cannot define or rename alias \"%s\": would create a loop",
|
||
Tcl_GetCommandName(cmdInterp, cmd)));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"ALIASLOOP", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Otherwise, follow the chain one step further. See if the target
|
||
* command is an alias - if so, follow the loop to its target command.
|
||
* Otherwise we do not have a loop.
|
||
*/
|
||
|
||
if (aliasCmdPtr->objProc != AliasObjCmd) {
|
||
return TCL_OK;
|
||
}
|
||
nextAliasPtr = aliasCmdPtr->objClientData;
|
||
}
|
||
|
||
/* NOTREACHED */
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AliasCreate --
|
||
*
|
||
* Helper function to do the work to actually create an alias.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* An alias command is created and entered into the alias table for the
|
||
* child interpreter.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
AliasCreate(
|
||
Tcl_Interp *interp, /* Interp for error reporting. */
|
||
Tcl_Interp *childInterp, /* Interp where alias cmd will live or from
|
||
* which alias will be deleted. */
|
||
Tcl_Interp *parentInterp, /* Interp in which target command will be
|
||
* invoked. */
|
||
Tcl_Obj *namePtr, /* Name of alias cmd. */
|
||
Tcl_Obj *targetNamePtr, /* Name of target cmd. */
|
||
int objc, /* Additional arguments to store */
|
||
Tcl_Obj *const objv[]) /* with alias. */
|
||
{
|
||
Alias *aliasPtr;
|
||
Tcl_HashEntry *hPtr;
|
||
Target *targetPtr;
|
||
Child *childPtr;
|
||
Parent *parentPtr;
|
||
Tcl_Obj **prefv;
|
||
int isNew, i;
|
||
|
||
aliasPtr = ckalloc(sizeof(Alias) + objc * sizeof(Tcl_Obj *));
|
||
aliasPtr->token = namePtr;
|
||
Tcl_IncrRefCount(aliasPtr->token);
|
||
aliasPtr->targetInterp = parentInterp;
|
||
|
||
aliasPtr->objc = objc + 1;
|
||
prefv = &aliasPtr->objPtr;
|
||
|
||
*prefv = targetNamePtr;
|
||
Tcl_IncrRefCount(targetNamePtr);
|
||
for (i = 0; i < objc; i++) {
|
||
*(++prefv) = objv[i];
|
||
Tcl_IncrRefCount(objv[i]);
|
||
}
|
||
|
||
Tcl_Preserve(childInterp);
|
||
Tcl_Preserve(parentInterp);
|
||
|
||
if (childInterp == parentInterp) {
|
||
aliasPtr->childCmd = Tcl_NRCreateCommand(childInterp,
|
||
TclGetString(namePtr), AliasObjCmd, AliasNRCmd, aliasPtr,
|
||
AliasObjCmdDeleteProc);
|
||
} else {
|
||
aliasPtr->childCmd = Tcl_CreateObjCommand(childInterp,
|
||
TclGetString(namePtr), AliasObjCmd, aliasPtr,
|
||
AliasObjCmdDeleteProc);
|
||
}
|
||
|
||
if (TclPreventAliasLoop(interp, childInterp,
|
||
aliasPtr->childCmd) != TCL_OK) {
|
||
/*
|
||
* Found an alias loop! The last call to Tcl_CreateObjCommand made the
|
||
* alias point to itself. Delete the command and its alias record. Be
|
||
* careful to wipe out its client data first, so the command doesn't
|
||
* try to delete itself.
|
||
*/
|
||
|
||
Command *cmdPtr;
|
||
|
||
Tcl_DecrRefCount(aliasPtr->token);
|
||
Tcl_DecrRefCount(targetNamePtr);
|
||
for (i = 0; i < objc; i++) {
|
||
Tcl_DecrRefCount(objv[i]);
|
||
}
|
||
|
||
cmdPtr = (Command *) aliasPtr->childCmd;
|
||
cmdPtr->clientData = NULL;
|
||
cmdPtr->deleteProc = NULL;
|
||
cmdPtr->deleteData = NULL;
|
||
Tcl_DeleteCommandFromToken(childInterp, aliasPtr->childCmd);
|
||
|
||
ckfree(aliasPtr);
|
||
|
||
/*
|
||
* The result was already set by TclPreventAliasLoop.
|
||
*/
|
||
|
||
Tcl_Release(childInterp);
|
||
Tcl_Release(parentInterp);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Make an entry in the alias table. If it already exists, retry.
|
||
*/
|
||
|
||
childPtr = &((InterpInfo *) ((Interp *) childInterp)->interpInfo)->child;
|
||
while (1) {
|
||
Tcl_Obj *newToken;
|
||
const char *string;
|
||
|
||
string = TclGetString(aliasPtr->token);
|
||
hPtr = Tcl_CreateHashEntry(&childPtr->aliasTable, string, &isNew);
|
||
if (isNew != 0) {
|
||
break;
|
||
}
|
||
|
||
/*
|
||
* The alias name cannot be used as unique token, it is already taken.
|
||
* We can produce a unique token by prepending "::" repeatedly. This
|
||
* algorithm is a stop-gap to try to maintain the command name as
|
||
* token for most use cases, fearful of possible backwards compat
|
||
* problems. A better algorithm would produce unique tokens that need
|
||
* not be related to the command name.
|
||
*
|
||
* ATTENTION: the tests in interp.test and possibly safe.test depend
|
||
* on the precise definition of these tokens.
|
||
*/
|
||
|
||
TclNewLiteralStringObj(newToken, "::");
|
||
Tcl_AppendObjToObj(newToken, aliasPtr->token);
|
||
Tcl_DecrRefCount(aliasPtr->token);
|
||
aliasPtr->token = newToken;
|
||
Tcl_IncrRefCount(aliasPtr->token);
|
||
}
|
||
|
||
aliasPtr->aliasEntryPtr = hPtr;
|
||
Tcl_SetHashValue(hPtr, aliasPtr);
|
||
|
||
/*
|
||
* Create the new command. We must do it after deleting any old command,
|
||
* because the alias may be pointing at a renamed alias, as in:
|
||
*
|
||
* interp alias {} foo {} bar # Create an alias "foo"
|
||
* rename foo zop # Now rename the alias
|
||
* interp alias {} foo {} zop # Now recreate "foo"...
|
||
*/
|
||
|
||
targetPtr = ckalloc(sizeof(Target));
|
||
targetPtr->childCmd = aliasPtr->childCmd;
|
||
targetPtr->childInterp = childInterp;
|
||
|
||
parentPtr = &((InterpInfo*) ((Interp*) parentInterp)->interpInfo)->parent;
|
||
targetPtr->nextPtr = parentPtr->targetsPtr;
|
||
targetPtr->prevPtr = NULL;
|
||
if (parentPtr->targetsPtr != NULL) {
|
||
parentPtr->targetsPtr->prevPtr = targetPtr;
|
||
}
|
||
parentPtr->targetsPtr = targetPtr;
|
||
aliasPtr->targetPtr = targetPtr;
|
||
|
||
Tcl_SetObjResult(interp, aliasPtr->token);
|
||
|
||
Tcl_Release(childInterp);
|
||
Tcl_Release(parentInterp);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AliasDelete --
|
||
*
|
||
* Deletes the given alias from the child interpreter given.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Deletes the alias from the child interpreter.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
AliasDelete(
|
||
Tcl_Interp *interp, /* Interpreter for result & errors. */
|
||
Tcl_Interp *childInterp, /* Interpreter containing alias. */
|
||
Tcl_Obj *namePtr) /* Name of alias to delete. */
|
||
{
|
||
Child *childPtr;
|
||
Alias *aliasPtr;
|
||
Tcl_HashEntry *hPtr;
|
||
|
||
/*
|
||
* If the alias has been renamed in the child, the parent can still use
|
||
* the original name (with which it was created) to find the alias to
|
||
* delete it.
|
||
*/
|
||
|
||
childPtr = &((InterpInfo *) ((Interp *) childInterp)->interpInfo)->child;
|
||
hPtr = Tcl_FindHashEntry(&childPtr->aliasTable, TclGetString(namePtr));
|
||
if (hPtr == NULL) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"alias \"%s\" not found", TclGetString(namePtr)));
|
||
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ALIAS",
|
||
TclGetString(namePtr), NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
aliasPtr = Tcl_GetHashValue(hPtr);
|
||
Tcl_DeleteCommandFromToken(childInterp, aliasPtr->childCmd);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AliasDescribe --
|
||
*
|
||
* Sets the interpreter's result object to a Tcl list describing the
|
||
* given alias in the given interpreter: its target command and the
|
||
* additional arguments to prepend to any invocation of the alias.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
AliasDescribe(
|
||
Tcl_Interp *interp, /* Interpreter for result & errors. */
|
||
Tcl_Interp *childInterp, /* Interpreter containing alias. */
|
||
Tcl_Obj *namePtr) /* Name of alias to describe. */
|
||
{
|
||
Child *childPtr;
|
||
Tcl_HashEntry *hPtr;
|
||
Alias *aliasPtr;
|
||
Tcl_Obj *prefixPtr;
|
||
|
||
/*
|
||
* If the alias has been renamed in the child, the parent can still use
|
||
* the original name (with which it was created) to find the alias to
|
||
* describe it.
|
||
*/
|
||
|
||
childPtr = &((InterpInfo *) ((Interp *) childInterp)->interpInfo)->child;
|
||
hPtr = Tcl_FindHashEntry(&childPtr->aliasTable, Tcl_GetString(namePtr));
|
||
if (hPtr == NULL) {
|
||
return TCL_OK;
|
||
}
|
||
aliasPtr = Tcl_GetHashValue(hPtr);
|
||
prefixPtr = Tcl_NewListObj(aliasPtr->objc, &aliasPtr->objPtr);
|
||
Tcl_SetObjResult(interp, prefixPtr);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AliasList --
|
||
*
|
||
* Computes a list of aliases defined in a child interpreter.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
AliasList(
|
||
Tcl_Interp *interp, /* Interp for data return. */
|
||
Tcl_Interp *childInterp) /* Interp whose aliases to compute. */
|
||
{
|
||
Tcl_HashEntry *entryPtr;
|
||
Tcl_HashSearch hashSearch;
|
||
Tcl_Obj *resultPtr = Tcl_NewObj();
|
||
Alias *aliasPtr;
|
||
Child *childPtr;
|
||
|
||
childPtr = &((InterpInfo *) ((Interp *) childInterp)->interpInfo)->child;
|
||
|
||
entryPtr = Tcl_FirstHashEntry(&childPtr->aliasTable, &hashSearch);
|
||
for ( ; entryPtr != NULL; entryPtr = Tcl_NextHashEntry(&hashSearch)) {
|
||
aliasPtr = Tcl_GetHashValue(entryPtr);
|
||
Tcl_ListObjAppendElement(NULL, resultPtr, aliasPtr->token);
|
||
}
|
||
Tcl_SetObjResult(interp, resultPtr);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AliasObjCmd --
|
||
*
|
||
* This is the function that services invocations of aliases in a child
|
||
* interpreter. One such command exists for each alias. When invoked,
|
||
* this function redirects the invocation to the target command in the
|
||
* parent interpreter as designated by the Alias record associated with
|
||
* this command.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Causes forwarding of the invocation; all possible side effects may
|
||
* occur as a result of invoking the command to which the invocation is
|
||
* forwarded.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
AliasNRCmd(
|
||
ClientData clientData, /* Alias record. */
|
||
Tcl_Interp *interp, /* Current interpreter. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument vector. */
|
||
{
|
||
Alias *aliasPtr = clientData;
|
||
int prefc, cmdc, i;
|
||
Tcl_Obj **prefv, **cmdv;
|
||
Tcl_Obj *listPtr;
|
||
List *listRep;
|
||
int flags = TCL_EVAL_INVOKE;
|
||
|
||
/*
|
||
* Append the arguments to the command prefix and invoke the command in
|
||
* the target interp's global namespace.
|
||
*/
|
||
|
||
prefc = aliasPtr->objc;
|
||
prefv = &aliasPtr->objPtr;
|
||
cmdc = prefc + objc - 1;
|
||
|
||
listPtr = Tcl_NewListObj(cmdc, NULL);
|
||
listRep = listPtr->internalRep.twoPtrValue.ptr1;
|
||
listRep->elemCount = cmdc;
|
||
cmdv = &listRep->elements;
|
||
|
||
prefv = &aliasPtr->objPtr;
|
||
memcpy(cmdv, prefv, prefc * sizeof(Tcl_Obj *));
|
||
memcpy(cmdv+prefc, objv+1, (objc-1) * sizeof(Tcl_Obj *));
|
||
|
||
for (i=0; i<cmdc; i++) {
|
||
Tcl_IncrRefCount(cmdv[i]);
|
||
}
|
||
|
||
/*
|
||
* Use the ensemble rewriting machinery to ensure correct error messages:
|
||
* only the source command should show, not the full target prefix.
|
||
*/
|
||
|
||
if (TclInitRewriteEnsemble(interp, 1, prefc, objv)) {
|
||
TclNRAddCallback(interp, TclClearRootEnsemble, NULL, NULL, NULL, NULL);
|
||
}
|
||
TclSkipTailcall(interp);
|
||
return Tcl_NREvalObj(interp, listPtr, flags);
|
||
}
|
||
|
||
static int
|
||
AliasObjCmd(
|
||
ClientData clientData, /* Alias record. */
|
||
Tcl_Interp *interp, /* Current interpreter. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument vector. */
|
||
{
|
||
#define ALIAS_CMDV_PREALLOC 10
|
||
Alias *aliasPtr = clientData;
|
||
Tcl_Interp *targetInterp = aliasPtr->targetInterp;
|
||
int result, prefc, cmdc, i;
|
||
Tcl_Obj **prefv, **cmdv;
|
||
Tcl_Obj *cmdArr[ALIAS_CMDV_PREALLOC];
|
||
Interp *tPtr = (Interp *) targetInterp;
|
||
int isRootEnsemble;
|
||
|
||
/*
|
||
* Append the arguments to the command prefix and invoke the command in
|
||
* the target interp's global namespace.
|
||
*/
|
||
|
||
prefc = aliasPtr->objc;
|
||
prefv = &aliasPtr->objPtr;
|
||
cmdc = prefc + objc - 1;
|
||
if (cmdc <= ALIAS_CMDV_PREALLOC) {
|
||
cmdv = cmdArr;
|
||
} else {
|
||
cmdv = TclStackAlloc(interp, cmdc * sizeof(Tcl_Obj *));
|
||
}
|
||
|
||
memcpy(cmdv, prefv, prefc * sizeof(Tcl_Obj *));
|
||
memcpy(cmdv+prefc, objv+1, (objc-1) * sizeof(Tcl_Obj *));
|
||
|
||
Tcl_ResetResult(targetInterp);
|
||
|
||
for (i=0; i<cmdc; i++) {
|
||
Tcl_IncrRefCount(cmdv[i]);
|
||
}
|
||
|
||
/*
|
||
* Use the ensemble rewriting machinery to ensure correct error messages:
|
||
* only the source command should show, not the full target prefix.
|
||
*/
|
||
|
||
isRootEnsemble = TclInitRewriteEnsemble((Tcl_Interp *)tPtr, 1, prefc, objv);
|
||
|
||
/*
|
||
* Protect the target interpreter if it isn't the same as the source
|
||
* interpreter so that we can continue to work with it after the target
|
||
* command completes.
|
||
*/
|
||
|
||
if (targetInterp != interp) {
|
||
Tcl_Preserve(targetInterp);
|
||
}
|
||
|
||
/*
|
||
* Execute the target command in the target interpreter.
|
||
*/
|
||
|
||
result = Tcl_EvalObjv(targetInterp, cmdc, cmdv, TCL_EVAL_INVOKE);
|
||
|
||
/*
|
||
* Clean up the ensemble rewrite info if we set it in the first place.
|
||
*/
|
||
|
||
if (isRootEnsemble) {
|
||
TclResetRewriteEnsemble((Tcl_Interp *)tPtr, 1);
|
||
}
|
||
|
||
/*
|
||
* If it was a cross-interpreter alias, we need to transfer the result
|
||
* back to the source interpreter and release the lock we previously set
|
||
* on the target interpreter.
|
||
*/
|
||
|
||
if (targetInterp != interp) {
|
||
Tcl_TransferResult(targetInterp, result, interp);
|
||
Tcl_Release(targetInterp);
|
||
}
|
||
|
||
for (i=0; i<cmdc; i++) {
|
||
Tcl_DecrRefCount(cmdv[i]);
|
||
}
|
||
if (cmdv != cmdArr) {
|
||
TclStackFree(interp, cmdv);
|
||
}
|
||
return result;
|
||
#undef ALIAS_CMDV_PREALLOC
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* AliasObjCmdDeleteProc --
|
||
*
|
||
* Is invoked when an alias command is deleted in a child. Cleans up all
|
||
* storage associated with this alias.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Deletes the alias record and its entry in the alias table for the
|
||
* interpreter.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
AliasObjCmdDeleteProc(
|
||
ClientData clientData) /* The alias record for this alias. */
|
||
{
|
||
Alias *aliasPtr = clientData;
|
||
Target *targetPtr;
|
||
int i;
|
||
Tcl_Obj **objv;
|
||
|
||
Tcl_DecrRefCount(aliasPtr->token);
|
||
objv = &aliasPtr->objPtr;
|
||
for (i = 0; i < aliasPtr->objc; i++) {
|
||
Tcl_DecrRefCount(objv[i]);
|
||
}
|
||
Tcl_DeleteHashEntry(aliasPtr->aliasEntryPtr);
|
||
|
||
/*
|
||
* Splice the target record out of the target interpreter's parent list.
|
||
*/
|
||
|
||
targetPtr = aliasPtr->targetPtr;
|
||
if (targetPtr->prevPtr != NULL) {
|
||
targetPtr->prevPtr->nextPtr = targetPtr->nextPtr;
|
||
} else {
|
||
Parent *parentPtr = &((InterpInfo *) ((Interp *)
|
||
aliasPtr->targetInterp)->interpInfo)->parent;
|
||
|
||
parentPtr->targetsPtr = targetPtr->nextPtr;
|
||
}
|
||
if (targetPtr->nextPtr != NULL) {
|
||
targetPtr->nextPtr->prevPtr = targetPtr->prevPtr;
|
||
}
|
||
|
||
ckfree(targetPtr);
|
||
ckfree(aliasPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_CreateChild --
|
||
*
|
||
* Creates a child interpreter. The childPath argument denotes the name
|
||
* of the new child relative to the current interpreter; the child is a
|
||
* direct descendant of the one-before-last component of the path,
|
||
* e.g. it is a descendant of the current interpreter if the childPath
|
||
* argument contains only one component. Optionally makes the child
|
||
* interpreter safe.
|
||
*
|
||
* Results:
|
||
* Returns the interpreter structure created, or NULL if an error
|
||
* occurred.
|
||
*
|
||
* Side effects:
|
||
* Creates a new interpreter and a new interpreter object command in the
|
||
* interpreter indicated by the childPath argument.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Interp *
|
||
Tcl_CreateChild(
|
||
Tcl_Interp *interp, /* Interpreter to start search at. */
|
||
const char *childPath, /* Name of child to create. */
|
||
int isSafe) /* Should new child be "safe" ? */
|
||
{
|
||
Tcl_Obj *pathPtr;
|
||
Tcl_Interp *childInterp;
|
||
|
||
pathPtr = Tcl_NewStringObj(childPath, -1);
|
||
childInterp = ChildCreate(interp, pathPtr, isSafe);
|
||
Tcl_DecrRefCount(pathPtr);
|
||
|
||
return childInterp;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetChild --
|
||
*
|
||
* Finds a child interpreter by its path name.
|
||
*
|
||
* Results:
|
||
* Returns a Tcl_Interp * for the named interpreter or NULL if not found.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Interp *
|
||
Tcl_GetChild(
|
||
Tcl_Interp *interp, /* Interpreter to start search from. */
|
||
const char *childPath) /* Path of child to find. */
|
||
{
|
||
Tcl_Obj *pathPtr;
|
||
Tcl_Interp *childInterp;
|
||
|
||
pathPtr = Tcl_NewStringObj(childPath, -1);
|
||
childInterp = GetInterp(interp, pathPtr);
|
||
Tcl_DecrRefCount(pathPtr);
|
||
|
||
return childInterp;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetParent --
|
||
*
|
||
* Finds the parent interpreter of a child interpreter.
|
||
*
|
||
* Results:
|
||
* Returns a Tcl_Interp * for the parent interpreter or NULL if none.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Interp *
|
||
Tcl_GetParent(
|
||
Tcl_Interp *interp) /* Get the parent of this interpreter. */
|
||
{
|
||
Child *childPtr; /* Child record of this interpreter. */
|
||
|
||
if (interp == NULL) {
|
||
return NULL;
|
||
}
|
||
childPtr = &((InterpInfo *) ((Interp *) interp)->interpInfo)->child;
|
||
return childPtr->parentInterp;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclSetChildCancelFlags --
|
||
*
|
||
* This function marks all child interpreters belonging to a given
|
||
* interpreter as being canceled or not canceled, depending on the
|
||
* provided flags.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
TclSetChildCancelFlags(
|
||
Tcl_Interp *interp, /* Set cancel flags of this interpreter. */
|
||
int flags, /* Collection of OR-ed bits that control
|
||
* the cancellation of the script. Only
|
||
* TCL_CANCEL_UNWIND is currently
|
||
* supported. */
|
||
int force) /* Non-zero to ignore numLevels for the purpose
|
||
* of resetting the cancellation flags. */
|
||
{
|
||
Parent *parentPtr; /* Parent record of given interpreter. */
|
||
Tcl_HashEntry *hPtr; /* Search element. */
|
||
Tcl_HashSearch hashSearch; /* Search variable. */
|
||
Child *childPtr; /* Child record of interpreter. */
|
||
Interp *iPtr;
|
||
|
||
if (interp == NULL) {
|
||
return;
|
||
}
|
||
|
||
flags &= (CANCELED | TCL_CANCEL_UNWIND);
|
||
|
||
parentPtr = &((InterpInfo *) ((Interp *) interp)->interpInfo)->parent;
|
||
|
||
hPtr = Tcl_FirstHashEntry(&parentPtr->childTable, &hashSearch);
|
||
for ( ; hPtr != NULL; hPtr = Tcl_NextHashEntry(&hashSearch)) {
|
||
childPtr = Tcl_GetHashValue(hPtr);
|
||
iPtr = (Interp *) childPtr->childInterp;
|
||
|
||
if (iPtr == NULL) {
|
||
continue;
|
||
}
|
||
|
||
if (flags == 0) {
|
||
TclResetCancellation((Tcl_Interp *) iPtr, force);
|
||
} else {
|
||
TclSetCancelFlags(iPtr, flags);
|
||
}
|
||
|
||
/*
|
||
* Now, recursively handle this for the children of this child
|
||
* interpreter.
|
||
*/
|
||
|
||
TclSetChildCancelFlags((Tcl_Interp *) iPtr, flags, force);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetInterpPath --
|
||
*
|
||
* Sets the result of the asking interpreter to a proper Tcl list
|
||
* containing the names of interpreters between the asking and target
|
||
* interpreters. The target interpreter must be either the same as the
|
||
* asking interpreter or one of its children (including recursively).
|
||
*
|
||
* Results:
|
||
* TCL_OK if the target interpreter is the same as, or a descendant of,
|
||
* the asking interpreter; TCL_ERROR else. This way one can distinguish
|
||
* between the case where the asking and target interps are the same (an
|
||
* empty list is the result, and TCL_OK is returned) and when the target
|
||
* is not a descendant of the asking interpreter (in which case the Tcl
|
||
* result is an error message and the function returns TCL_ERROR).
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_GetInterpPath(
|
||
Tcl_Interp *interp, /* Interpreter to start search from. */
|
||
Tcl_Interp *targetInterp) /* Interpreter to find. */
|
||
{
|
||
InterpInfo *iiPtr;
|
||
|
||
if (targetInterp == interp) {
|
||
Tcl_SetObjResult(interp, Tcl_NewObj());
|
||
return TCL_OK;
|
||
}
|
||
if (targetInterp == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
iiPtr = (InterpInfo *) ((Interp *) targetInterp)->interpInfo;
|
||
if (Tcl_GetInterpPath(interp, iiPtr->child.parentInterp) != TCL_OK){
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_ListObjAppendElement(NULL, Tcl_GetObjResult(interp),
|
||
Tcl_NewStringObj(Tcl_GetHashKey(&iiPtr->parent.childTable,
|
||
iiPtr->child.childEntryPtr), -1));
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* GetInterp --
|
||
*
|
||
* Helper function to find a child interpreter given a pathname.
|
||
*
|
||
* Results:
|
||
* Returns the child interpreter known by that name in the calling
|
||
* interpreter, or NULL if no interpreter known by that name exists.
|
||
*
|
||
* Side effects:
|
||
* Assigns to the pointer variable passed in, if not NULL.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static Tcl_Interp *
|
||
GetInterp(
|
||
Tcl_Interp *interp, /* Interp. to start search from. */
|
||
Tcl_Obj *pathPtr) /* List object containing name of interp. to
|
||
* be found. */
|
||
{
|
||
Tcl_HashEntry *hPtr; /* Search element. */
|
||
Child *childPtr; /* Interim child record. */
|
||
Tcl_Obj **objv;
|
||
int objc, i;
|
||
Tcl_Interp *searchInterp; /* Interim storage for interp. to find. */
|
||
InterpInfo *parentInfoPtr;
|
||
|
||
if (TclListObjGetElements(interp, pathPtr, &objc, &objv) != TCL_OK) {
|
||
return NULL;
|
||
}
|
||
|
||
searchInterp = interp;
|
||
for (i = 0; i < objc; i++) {
|
||
parentInfoPtr = (InterpInfo *) ((Interp *) searchInterp)->interpInfo;
|
||
hPtr = Tcl_FindHashEntry(&parentInfoPtr->parent.childTable,
|
||
TclGetString(objv[i]));
|
||
if (hPtr == NULL) {
|
||
searchInterp = NULL;
|
||
break;
|
||
}
|
||
childPtr = Tcl_GetHashValue(hPtr);
|
||
searchInterp = childPtr->childInterp;
|
||
if (searchInterp == NULL) {
|
||
break;
|
||
}
|
||
}
|
||
if (searchInterp == NULL) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"could not find interpreter \"%s\"", TclGetString(pathPtr)));
|
||
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "INTERP",
|
||
TclGetString(pathPtr), NULL);
|
||
}
|
||
return searchInterp;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildBgerror --
|
||
*
|
||
* Helper function to set/query the background error handling command
|
||
* prefix of an interp
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* When (objc == 1), childInterp will be set to a new background handler
|
||
* of objv[0].
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildBgerror(
|
||
Tcl_Interp *interp, /* Interp for error return. */
|
||
Tcl_Interp *childInterp, /* Interp in which limit is set/queried. */
|
||
int objc, /* Set or Query. */
|
||
Tcl_Obj *const objv[]) /* Argument strings. */
|
||
{
|
||
if (objc) {
|
||
int length;
|
||
|
||
if (TCL_ERROR == TclListObjLength(NULL, objv[0], &length)
|
||
|| (length < 1)) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"cmdPrefix must be list of length >= 1", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"BGERRORFORMAT", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
TclSetBgErrorHandler(childInterp, objv[0]);
|
||
}
|
||
Tcl_SetObjResult(interp, TclGetBgErrorHandler(childInterp));
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildCreate --
|
||
*
|
||
* Helper function to do the actual work of creating a child interp and
|
||
* new object command. Also optionally makes the new child interpreter
|
||
* "safe".
|
||
*
|
||
* Results:
|
||
* Returns the new Tcl_Interp * if successful or NULL if not. If failed,
|
||
* the result of the invoking interpreter contains an error message.
|
||
*
|
||
* Side effects:
|
||
* Creates a new child interpreter and a new object command.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static Tcl_Interp *
|
||
ChildCreate(
|
||
Tcl_Interp *interp, /* Interp. to start search from. */
|
||
Tcl_Obj *pathPtr, /* Path (name) of child to create. */
|
||
int safe) /* Should we make it "safe"? */
|
||
{
|
||
Tcl_Interp *parentInterp, *childInterp;
|
||
Child *childPtr;
|
||
InterpInfo *parentInfoPtr;
|
||
Tcl_HashEntry *hPtr;
|
||
const char *path;
|
||
int isNew, objc;
|
||
Tcl_Obj **objv;
|
||
|
||
if (Tcl_ListObjGetElements(interp, pathPtr, &objc, &objv) != TCL_OK) {
|
||
return NULL;
|
||
}
|
||
if (objc < 2) {
|
||
parentInterp = interp;
|
||
path = TclGetString(pathPtr);
|
||
} else {
|
||
Tcl_Obj *objPtr;
|
||
|
||
objPtr = Tcl_NewListObj(objc - 1, objv);
|
||
parentInterp = GetInterp(interp, objPtr);
|
||
Tcl_DecrRefCount(objPtr);
|
||
if (parentInterp == NULL) {
|
||
return NULL;
|
||
}
|
||
path = TclGetString(objv[objc - 1]);
|
||
}
|
||
if (safe == 0) {
|
||
safe = Tcl_IsSafe(parentInterp);
|
||
}
|
||
|
||
parentInfoPtr = (InterpInfo *) ((Interp *) parentInterp)->interpInfo;
|
||
hPtr = Tcl_CreateHashEntry(&parentInfoPtr->parent.childTable, path,
|
||
&isNew);
|
||
if (isNew == 0) {
|
||
Tcl_SetObjResult(interp, Tcl_ObjPrintf(
|
||
"interpreter named \"%s\" already exists, cannot create",
|
||
path));
|
||
return NULL;
|
||
}
|
||
|
||
childInterp = Tcl_CreateInterp();
|
||
childPtr = &((InterpInfo *) ((Interp *) childInterp)->interpInfo)->child;
|
||
childPtr->parentInterp = parentInterp;
|
||
childPtr->childEntryPtr = hPtr;
|
||
childPtr->childInterp = childInterp;
|
||
childPtr->interpCmd = Tcl_NRCreateCommand(parentInterp, path,
|
||
ChildObjCmd, NRChildCmd, childInterp, ChildObjCmdDeleteProc);
|
||
Tcl_InitHashTable(&childPtr->aliasTable, TCL_STRING_KEYS);
|
||
Tcl_SetHashValue(hPtr, childPtr);
|
||
Tcl_SetVar(childInterp, "tcl_interactive", "0", TCL_GLOBAL_ONLY);
|
||
|
||
/*
|
||
* Inherit the recursion limit.
|
||
*/
|
||
|
||
((Interp *) childInterp)->maxNestingDepth =
|
||
((Interp *) parentInterp)->maxNestingDepth;
|
||
|
||
if (safe) {
|
||
if (Tcl_MakeSafe(childInterp) == TCL_ERROR) {
|
||
goto error;
|
||
}
|
||
} else {
|
||
if (Tcl_Init(childInterp) == TCL_ERROR) {
|
||
goto error;
|
||
}
|
||
|
||
/*
|
||
* This will create the "memory" command in child interpreters if we
|
||
* compiled with TCL_MEM_DEBUG, otherwise it does nothing.
|
||
*/
|
||
|
||
Tcl_InitMemory(childInterp);
|
||
}
|
||
|
||
/*
|
||
* Inherit the TIP#143 limits.
|
||
*/
|
||
|
||
InheritLimitsFromParent(childInterp, parentInterp);
|
||
|
||
/*
|
||
* The [clock] command presents a safe API, but uses unsafe features in
|
||
* its implementation. This means it has to be implemented in safe interps
|
||
* as an alias to a version in the (trusted) parent.
|
||
*/
|
||
|
||
if (safe) {
|
||
Tcl_Obj *clockObj;
|
||
int status;
|
||
|
||
TclNewLiteralStringObj(clockObj, "clock");
|
||
Tcl_IncrRefCount(clockObj);
|
||
status = AliasCreate(interp, childInterp, parentInterp, clockObj,
|
||
clockObj, 0, NULL);
|
||
Tcl_DecrRefCount(clockObj);
|
||
if (status != TCL_OK) {
|
||
goto error2;
|
||
}
|
||
}
|
||
|
||
return childInterp;
|
||
|
||
error:
|
||
Tcl_TransferResult(childInterp, TCL_ERROR, interp);
|
||
error2:
|
||
Tcl_DeleteInterp(childInterp);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildObjCmd --
|
||
*
|
||
* Command to manipulate an interpreter, e.g. to send commands to it to
|
||
* be evaluated. One such command exists for each child interpreter.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* See user documentation for details.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildObjCmd(
|
||
ClientData clientData, /* Child interpreter. */
|
||
Tcl_Interp *interp, /* Current interpreter. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument objects. */
|
||
{
|
||
return Tcl_NRCallObjProc(interp, NRChildCmd, clientData, objc, objv);
|
||
}
|
||
|
||
static int
|
||
NRChildCmd(
|
||
ClientData clientData, /* Child interpreter. */
|
||
Tcl_Interp *interp, /* Current interpreter. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument objects. */
|
||
{
|
||
Tcl_Interp *childInterp = clientData;
|
||
int index;
|
||
static const char *const options[] = {
|
||
"alias", "aliases", "bgerror", "debug",
|
||
"eval", "expose", "hide", "hidden",
|
||
"issafe", "invokehidden", "limit", "marktrusted",
|
||
"recursionlimit", NULL
|
||
};
|
||
enum options {
|
||
OPT_ALIAS, OPT_ALIASES, OPT_BGERROR, OPT_DEBUG,
|
||
OPT_EVAL, OPT_EXPOSE, OPT_HIDE, OPT_HIDDEN,
|
||
OPT_ISSAFE, OPT_INVOKEHIDDEN, OPT_LIMIT, OPT_MARKTRUSTED,
|
||
OPT_RECLIMIT
|
||
};
|
||
|
||
if (childInterp == NULL) {
|
||
Tcl_Panic("ChildObjCmd: interpreter has been deleted");
|
||
}
|
||
|
||
if (objc < 2) {
|
||
Tcl_WrongNumArgs(interp, 1, objv, "cmd ?arg ...?");
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_GetIndexFromObj(interp, objv[1], options, "option", 0,
|
||
&index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
switch ((enum options) index) {
|
||
case OPT_ALIAS:
|
||
if (objc > 2) {
|
||
if (objc == 3) {
|
||
return AliasDescribe(interp, childInterp, objv[2]);
|
||
}
|
||
if (TclGetString(objv[3])[0] == '\0') {
|
||
if (objc == 4) {
|
||
return AliasDelete(interp, childInterp, objv[2]);
|
||
}
|
||
} else {
|
||
return AliasCreate(interp, childInterp, interp, objv[2],
|
||
objv[3], objc - 4, objv + 4);
|
||
}
|
||
}
|
||
Tcl_WrongNumArgs(interp, 2, objv, "aliasName ?targetName? ?arg ...?");
|
||
return TCL_ERROR;
|
||
case OPT_ALIASES:
|
||
if (objc != 2) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
return AliasList(interp, childInterp);
|
||
case OPT_BGERROR:
|
||
if (objc != 2 && objc != 3) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "?cmdPrefix?");
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildBgerror(interp, childInterp, objc - 2, objv + 2);
|
||
case OPT_DEBUG:
|
||
/*
|
||
* TIP #378
|
||
* Currently only -frame supported, otherwise ?-option ?value? ...?
|
||
*/
|
||
if (objc > 4) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "?-frame ?bool??");
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildDebugCmd(interp, childInterp, objc - 2, objv + 2);
|
||
case OPT_EVAL:
|
||
if (objc < 3) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "arg ?arg ...?");
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildEval(interp, childInterp, objc - 2, objv + 2);
|
||
case OPT_EXPOSE:
|
||
if ((objc < 3) || (objc > 4)) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "hiddenCmdName ?cmdName?");
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildExpose(interp, childInterp, objc - 2, objv + 2);
|
||
case OPT_HIDE:
|
||
if ((objc < 3) || (objc > 4)) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "cmdName ?hiddenCmdName?");
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildHide(interp, childInterp, objc - 2, objv + 2);
|
||
case OPT_HIDDEN:
|
||
if (objc != 2) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildHidden(interp, childInterp);
|
||
case OPT_ISSAFE:
|
||
if (objc != 2) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(Tcl_IsSafe(childInterp)));
|
||
return TCL_OK;
|
||
case OPT_INVOKEHIDDEN: {
|
||
int i;
|
||
const char *namespaceName;
|
||
static const char *const hiddenOptions[] = {
|
||
"-global", "-namespace", "--", NULL
|
||
};
|
||
enum hiddenOption {
|
||
OPT_GLOBAL, OPT_NAMESPACE, OPT_LAST
|
||
};
|
||
|
||
namespaceName = NULL;
|
||
for (i = 2; i < objc; i++) {
|
||
if (TclGetString(objv[i])[0] != '-') {
|
||
break;
|
||
}
|
||
if (Tcl_GetIndexFromObj(interp, objv[i], hiddenOptions, "option",
|
||
0, &index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (index == OPT_GLOBAL) {
|
||
namespaceName = "::";
|
||
} else if (index == OPT_NAMESPACE) {
|
||
if (++i == objc) { /* There must be more arguments. */
|
||
break;
|
||
} else {
|
||
namespaceName = TclGetString(objv[i]);
|
||
}
|
||
} else {
|
||
i++;
|
||
break;
|
||
}
|
||
}
|
||
if (objc - i < 1) {
|
||
Tcl_WrongNumArgs(interp, 2, objv,
|
||
"?-namespace ns? ?-global? ?--? cmd ?arg ..?");
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildInvokeHidden(interp, childInterp, namespaceName,
|
||
objc - i, objv + i);
|
||
}
|
||
case OPT_LIMIT: {
|
||
static const char *const limitTypes[] = {
|
||
"commands", "time", NULL
|
||
};
|
||
enum LimitTypes {
|
||
LIMIT_TYPE_COMMANDS, LIMIT_TYPE_TIME
|
||
};
|
||
int limitType;
|
||
|
||
if (objc < 3) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "limitType ?-option value ...?");
|
||
return TCL_ERROR;
|
||
}
|
||
if (Tcl_GetIndexFromObj(interp, objv[2], limitTypes, "limit type", 0,
|
||
&limitType) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
switch ((enum LimitTypes) limitType) {
|
||
case LIMIT_TYPE_COMMANDS:
|
||
return ChildCommandLimitCmd(interp, childInterp, 3, objc,objv);
|
||
case LIMIT_TYPE_TIME:
|
||
return ChildTimeLimitCmd(interp, childInterp, 3, objc, objv);
|
||
}
|
||
}
|
||
break;
|
||
case OPT_MARKTRUSTED:
|
||
if (objc != 2) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildMarkTrusted(interp, childInterp);
|
||
case OPT_RECLIMIT:
|
||
if (objc != 2 && objc != 3) {
|
||
Tcl_WrongNumArgs(interp, 2, objv, "?newlimit?");
|
||
return TCL_ERROR;
|
||
}
|
||
return ChildRecursionLimit(interp, childInterp, objc - 2, objv + 2);
|
||
}
|
||
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildObjCmdDeleteProc --
|
||
*
|
||
* Invoked when an object command for a child interpreter is deleted;
|
||
* cleans up all state associated with the child interpreter and destroys
|
||
* the child interpreter.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Cleans up all state associated with the child interpreter and destroys
|
||
* the child interpreter.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ChildObjCmdDeleteProc(
|
||
ClientData clientData) /* The ChildRecord for the command. */
|
||
{
|
||
Child *childPtr; /* Interim storage for Child record. */
|
||
Tcl_Interp *childInterp = clientData;
|
||
/* And for a child interp. */
|
||
|
||
childPtr = &((InterpInfo *) ((Interp *) childInterp)->interpInfo)->child;
|
||
|
||
/*
|
||
* Unlink the child from its parent interpreter.
|
||
*/
|
||
|
||
Tcl_DeleteHashEntry(childPtr->childEntryPtr);
|
||
|
||
/*
|
||
* Set to NULL so that when the InterpInfo is cleaned up in the child it
|
||
* does not try to delete the command causing all sorts of grief. See
|
||
* ChildRecordDeleteProc().
|
||
*/
|
||
|
||
childPtr->interpCmd = NULL;
|
||
|
||
if (childPtr->childInterp != NULL) {
|
||
Tcl_DeleteInterp(childPtr->childInterp);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildDebugCmd -- TIP #378
|
||
*
|
||
* Helper function to handle 'debug' command in a child interpreter.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* May modify INTERP_DEBUG_FRAME flag in the child.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildDebugCmd(
|
||
Tcl_Interp *interp, /* Interp for error return. */
|
||
Tcl_Interp *childInterp, /* The child interpreter in which command
|
||
* will be evaluated. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument objects. */
|
||
{
|
||
static const char *const debugTypes[] = {
|
||
"-frame", NULL
|
||
};
|
||
enum DebugTypes {
|
||
DEBUG_TYPE_FRAME
|
||
};
|
||
int debugType;
|
||
Interp *iPtr;
|
||
Tcl_Obj *resultPtr;
|
||
|
||
iPtr = (Interp *) childInterp;
|
||
if (objc == 0) {
|
||
resultPtr = Tcl_NewObj();
|
||
Tcl_ListObjAppendElement(NULL, resultPtr,
|
||
Tcl_NewStringObj("-frame", -1));
|
||
Tcl_ListObjAppendElement(NULL, resultPtr,
|
||
Tcl_NewBooleanObj(iPtr->flags & INTERP_DEBUG_FRAME));
|
||
Tcl_SetObjResult(interp, resultPtr);
|
||
} else {
|
||
if (Tcl_GetIndexFromObj(interp, objv[0], debugTypes, "debug option",
|
||
0, &debugType) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (debugType == DEBUG_TYPE_FRAME) {
|
||
if (objc == 2) { /* set */
|
||
if (Tcl_GetBooleanFromObj(interp, objv[1], &debugType)
|
||
!= TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Quietly ignore attempts to disable interp debugging. This
|
||
* is a one-way switch as frame debug info is maintained in a
|
||
* stack that must be consistent once turned on.
|
||
*/
|
||
|
||
if (debugType) {
|
||
iPtr->flags |= INTERP_DEBUG_FRAME;
|
||
}
|
||
}
|
||
Tcl_SetObjResult(interp,
|
||
Tcl_NewBooleanObj(iPtr->flags & INTERP_DEBUG_FRAME));
|
||
}
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildEval --
|
||
*
|
||
* Helper function to evaluate a command in a child interpreter.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Whatever the command does.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildEval(
|
||
Tcl_Interp *interp, /* Interp for error return. */
|
||
Tcl_Interp *childInterp, /* The child interpreter in which command
|
||
* will be evaluated. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument objects. */
|
||
{
|
||
int result;
|
||
|
||
/*
|
||
* TIP #285: If necessary, reset the cancellation flags for the child
|
||
* interpreter now; otherwise, canceling a script in a parent interpreter
|
||
* can result in a situation where a child interpreter can no longer
|
||
* evaluate any scripts unless somebody calls the TclResetCancellation
|
||
* function for that particular Tcl_Interp.
|
||
*/
|
||
|
||
TclSetChildCancelFlags(childInterp, 0, 0);
|
||
|
||
Tcl_Preserve(childInterp);
|
||
Tcl_AllowExceptions(childInterp);
|
||
|
||
if (objc == 1) {
|
||
/*
|
||
* TIP #280: Make actual argument location available to eval'd script.
|
||
*/
|
||
|
||
Interp *iPtr = (Interp *) interp;
|
||
CmdFrame *invoker = iPtr->cmdFramePtr;
|
||
int word = 0;
|
||
|
||
TclArgumentGet(interp, objv[0], &invoker, &word);
|
||
|
||
result = TclEvalObjEx(childInterp, objv[0], 0, invoker, word);
|
||
} else {
|
||
Tcl_Obj *objPtr = Tcl_ConcatObj(objc, objv);
|
||
Tcl_IncrRefCount(objPtr);
|
||
result = Tcl_EvalObjEx(childInterp, objPtr, 0);
|
||
Tcl_DecrRefCount(objPtr);
|
||
}
|
||
Tcl_TransferResult(childInterp, result, interp);
|
||
|
||
Tcl_Release(childInterp);
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildExpose --
|
||
*
|
||
* Helper function to expose a command in a child interpreter.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* After this call scripts in the child will be able to invoke the newly
|
||
* exposed command.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildExpose(
|
||
Tcl_Interp *interp, /* Interp for error return. */
|
||
Tcl_Interp *childInterp, /* Interp in which command will be exposed. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument strings. */
|
||
{
|
||
const char *name;
|
||
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"permission denied: safe interpreter cannot expose commands",
|
||
-1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "UNSAFE",
|
||
NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
name = TclGetString(objv[(objc == 1) ? 0 : 1]);
|
||
if (Tcl_ExposeCommand(childInterp, TclGetString(objv[0]),
|
||
name) != TCL_OK) {
|
||
Tcl_TransferResult(childInterp, TCL_ERROR, interp);
|
||
return TCL_ERROR;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildRecursionLimit --
|
||
*
|
||
* Helper function to set/query the Recursion limit of an interp
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* When (objc == 1), childInterp will be set to a new recursion limit of
|
||
* objv[0].
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildRecursionLimit(
|
||
Tcl_Interp *interp, /* Interp for error return. */
|
||
Tcl_Interp *childInterp, /* Interp in which limit is set/queried. */
|
||
int objc, /* Set or Query. */
|
||
Tcl_Obj *const objv[]) /* Argument strings. */
|
||
{
|
||
Interp *iPtr;
|
||
int limit;
|
||
|
||
if (objc) {
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj("permission denied: "
|
||
"safe interpreters cannot change recursion limit", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "UNSAFE",
|
||
NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if (TclGetIntFromObj(interp, objv[0], &limit) == TCL_ERROR) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (limit <= 0) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"recursion limit must be > 0", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "BADLIMIT",
|
||
NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_SetRecursionLimit(childInterp, limit);
|
||
iPtr = (Interp *) childInterp;
|
||
if (interp == childInterp && iPtr->numLevels > limit) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"falling back due to new recursion limit", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "RECURSION", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_SetObjResult(interp, objv[0]);
|
||
return TCL_OK;
|
||
} else {
|
||
limit = Tcl_SetRecursionLimit(childInterp, 0);
|
||
Tcl_SetObjResult(interp, Tcl_NewIntObj(limit));
|
||
return TCL_OK;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildHide --
|
||
*
|
||
* Helper function to hide a command in a child interpreter.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* After this call scripts in the child will no longer be able to invoke
|
||
* the named command.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildHide(
|
||
Tcl_Interp *interp, /* Interp for error return. */
|
||
Tcl_Interp *childInterp, /* Interp in which command will be exposed. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument strings. */
|
||
{
|
||
const char *name;
|
||
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"permission denied: safe interpreter cannot hide commands",
|
||
-1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "UNSAFE",
|
||
NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
name = TclGetString(objv[(objc == 1) ? 0 : 1]);
|
||
if (Tcl_HideCommand(childInterp, TclGetString(objv[0]), name) != TCL_OK) {
|
||
Tcl_TransferResult(childInterp, TCL_ERROR, interp);
|
||
return TCL_ERROR;
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildHidden --
|
||
*
|
||
* Helper function to compute list of hidden commands in a child
|
||
* interpreter.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildHidden(
|
||
Tcl_Interp *interp, /* Interp for data return. */
|
||
Tcl_Interp *childInterp) /* Interp whose hidden commands to query. */
|
||
{
|
||
Tcl_Obj *listObjPtr = Tcl_NewObj(); /* Local object pointer. */
|
||
Tcl_HashTable *hTblPtr; /* For local searches. */
|
||
Tcl_HashEntry *hPtr; /* For local searches. */
|
||
Tcl_HashSearch hSearch; /* For local searches. */
|
||
|
||
hTblPtr = ((Interp *) childInterp)->hiddenCmdTablePtr;
|
||
if (hTblPtr != NULL) {
|
||
for (hPtr = Tcl_FirstHashEntry(hTblPtr, &hSearch);
|
||
hPtr != NULL;
|
||
hPtr = Tcl_NextHashEntry(&hSearch)) {
|
||
Tcl_ListObjAppendElement(NULL, listObjPtr,
|
||
Tcl_NewStringObj(Tcl_GetHashKey(hTblPtr, hPtr), -1));
|
||
}
|
||
}
|
||
Tcl_SetObjResult(interp, listObjPtr);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildInvokeHidden --
|
||
*
|
||
* Helper function to invoke a hidden command in a child interpreter.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Whatever the hidden command does.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildInvokeHidden(
|
||
Tcl_Interp *interp, /* Interp for error return. */
|
||
Tcl_Interp *childInterp, /* The child interpreter in which command will
|
||
* be invoked. */
|
||
const char *namespaceName, /* The namespace to use, if any. */
|
||
int objc, /* Number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument objects. */
|
||
{
|
||
int result;
|
||
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"not allowed to invoke hidden commands from safe interpreter",
|
||
-1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "UNSAFE",
|
||
NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
Tcl_Preserve(childInterp);
|
||
Tcl_AllowExceptions(childInterp);
|
||
|
||
if (namespaceName == NULL) {
|
||
NRE_callback *rootPtr = TOP_CB(childInterp);
|
||
|
||
Tcl_NRAddCallback(interp, NRPostInvokeHidden, childInterp,
|
||
rootPtr, NULL, NULL);
|
||
return TclNRInvoke(NULL, childInterp, objc, objv);
|
||
} else {
|
||
Namespace *nsPtr, *dummy1, *dummy2;
|
||
const char *tail;
|
||
|
||
result = TclGetNamespaceForQualName(childInterp, namespaceName, NULL,
|
||
TCL_FIND_ONLY_NS | TCL_GLOBAL_ONLY | TCL_LEAVE_ERR_MSG
|
||
| TCL_CREATE_NS_IF_UNKNOWN, &nsPtr, &dummy1, &dummy2, &tail);
|
||
if (result == TCL_OK) {
|
||
result = TclObjInvokeNamespace(childInterp, objc, objv,
|
||
(Tcl_Namespace *) nsPtr, TCL_INVOKE_HIDDEN);
|
||
}
|
||
}
|
||
|
||
Tcl_TransferResult(childInterp, result, interp);
|
||
|
||
Tcl_Release(childInterp);
|
||
return result;
|
||
}
|
||
|
||
static int
|
||
NRPostInvokeHidden(
|
||
ClientData data[],
|
||
Tcl_Interp *interp,
|
||
int result)
|
||
{
|
||
Tcl_Interp *childInterp = (Tcl_Interp *)data[0];
|
||
NRE_callback *rootPtr = (NRE_callback *)data[1];
|
||
|
||
if (interp != childInterp) {
|
||
result = TclNRRunCallbacks(childInterp, result, rootPtr);
|
||
Tcl_TransferResult(childInterp, result, interp);
|
||
}
|
||
Tcl_Release(childInterp);
|
||
return result;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildMarkTrusted --
|
||
*
|
||
* Helper function to mark a child interpreter as trusted (unsafe).
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* After this call the hard-wired security checks in the core no longer
|
||
* prevent the child from performing certain operations.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildMarkTrusted(
|
||
Tcl_Interp *interp, /* Interp for error return. */
|
||
Tcl_Interp *childInterp) /* The child interpreter which will be marked
|
||
* trusted. */
|
||
{
|
||
if (Tcl_IsSafe(interp)) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"permission denied: safe interpreter cannot mark trusted",
|
||
-1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "UNSAFE",
|
||
NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
((Interp *) childInterp)->flags &= ~SAFE_INTERP;
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_IsSafe --
|
||
*
|
||
* Determines whether an interpreter is safe
|
||
*
|
||
* Results:
|
||
* 1 if it is safe, 0 if it is not.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_IsSafe(
|
||
Tcl_Interp *interp) /* Is this interpreter "safe" ? */
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
if (iPtr == NULL) {
|
||
return 0;
|
||
}
|
||
return (iPtr->flags & SAFE_INTERP) ? 1 : 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_MakeSafe --
|
||
*
|
||
* Makes its argument interpreter contain only functionality that is
|
||
* defined to be part of Safe Tcl. Unsafe commands are hidden, the env
|
||
* array is unset, and the standard channels are removed.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Hides commands in its argument interpreter, and removes settings and
|
||
* channels.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_MakeSafe(
|
||
Tcl_Interp *interp) /* Interpreter to be made safe. */
|
||
{
|
||
Tcl_Channel chan; /* Channel to remove from safe interpreter. */
|
||
Interp *iPtr = (Interp *) interp;
|
||
Tcl_Interp *parent = ((InterpInfo*) iPtr->interpInfo)->child.parentInterp;
|
||
|
||
TclHideUnsafeCommands(interp);
|
||
|
||
if (parent != NULL) {
|
||
/*
|
||
* Alias these function implementations in the child to those in the
|
||
* parent; the overall implementations are safe, but they're normally
|
||
* defined by init.tcl which is not sourced by safe interpreters.
|
||
* Assume these functions all work. [Bug 2895741]
|
||
*/
|
||
|
||
(void) Tcl_Eval(interp,
|
||
"namespace eval ::tcl {namespace eval mathfunc {}}");
|
||
(void) Tcl_CreateAlias(interp, "::tcl::mathfunc::min", parent,
|
||
"::tcl::mathfunc::min", 0, NULL);
|
||
(void) Tcl_CreateAlias(interp, "::tcl::mathfunc::max", parent,
|
||
"::tcl::mathfunc::max", 0, NULL);
|
||
}
|
||
|
||
iPtr->flags |= SAFE_INTERP;
|
||
|
||
/*
|
||
* Unsetting variables : (which should not have been set in the first
|
||
* place, but...)
|
||
*/
|
||
|
||
/*
|
||
* No env array in a safe interpreter.
|
||
*/
|
||
|
||
Tcl_UnsetVar(interp, "env", TCL_GLOBAL_ONLY);
|
||
|
||
/*
|
||
* Remove unsafe parts of tcl_platform
|
||
*/
|
||
|
||
Tcl_UnsetVar2(interp, "tcl_platform", "os", TCL_GLOBAL_ONLY);
|
||
Tcl_UnsetVar2(interp, "tcl_platform", "osVersion", TCL_GLOBAL_ONLY);
|
||
Tcl_UnsetVar2(interp, "tcl_platform", "machine", TCL_GLOBAL_ONLY);
|
||
Tcl_UnsetVar2(interp, "tcl_platform", "user", TCL_GLOBAL_ONLY);
|
||
|
||
/*
|
||
* Unset path informations variables (the only one remaining is [info
|
||
* nameofexecutable])
|
||
*/
|
||
|
||
Tcl_UnsetVar(interp, "tclDefaultLibrary", TCL_GLOBAL_ONLY);
|
||
Tcl_UnsetVar(interp, "tcl_library", TCL_GLOBAL_ONLY);
|
||
Tcl_UnsetVar(interp, "tcl_pkgPath", TCL_GLOBAL_ONLY);
|
||
|
||
/*
|
||
* Remove the standard channels from the interpreter; safe interpreters do
|
||
* not ordinarily have access to stdin, stdout and stderr.
|
||
*
|
||
* NOTE: These channels are not added to the interpreter by the
|
||
* Tcl_CreateInterp call, but may be added later, by another I/O
|
||
* operation. We want to ensure that the interpreter does not have these
|
||
* channels even if it is being made safe after being used for some time..
|
||
*/
|
||
|
||
chan = Tcl_GetStdChannel(TCL_STDIN);
|
||
if (chan != NULL) {
|
||
Tcl_UnregisterChannel(interp, chan);
|
||
}
|
||
chan = Tcl_GetStdChannel(TCL_STDOUT);
|
||
if (chan != NULL) {
|
||
Tcl_UnregisterChannel(interp, chan);
|
||
}
|
||
chan = Tcl_GetStdChannel(TCL_STDERR);
|
||
if (chan != NULL) {
|
||
Tcl_UnregisterChannel(interp, chan);
|
||
}
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitExceeded --
|
||
*
|
||
* Tests whether any limit has been exceeded in the given interpreter
|
||
* (i.e. whether the interpreter is currently unable to process further
|
||
* scripts).
|
||
*
|
||
* Results:
|
||
* A boolean value.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
* Notes:
|
||
* If you change this function, you MUST also update TclLimitExceeded() in
|
||
* tclInt.h.
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_LimitExceeded(
|
||
Tcl_Interp *interp)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
return iPtr->limit.exceeded != 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitReady --
|
||
*
|
||
* Find out whether any limit has been set on the interpreter, and if so
|
||
* check whether the granularity of that limit is such that the full
|
||
* limit check should be carried out.
|
||
*
|
||
* Results:
|
||
* A boolean value that indicates whether to call Tcl_LimitCheck.
|
||
*
|
||
* Side effects:
|
||
* Increments the limit granularity counter.
|
||
*
|
||
* Notes:
|
||
* If you change this function, you MUST also update TclLimitReady() in
|
||
* tclInt.h.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_LimitReady(
|
||
Tcl_Interp *interp)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
if (iPtr->limit.active != 0) {
|
||
int ticker = ++iPtr->limit.granularityTicker;
|
||
|
||
if ((iPtr->limit.active & TCL_LIMIT_COMMANDS) &&
|
||
((iPtr->limit.cmdGranularity == 1) ||
|
||
(ticker % iPtr->limit.cmdGranularity == 0))) {
|
||
return 1;
|
||
}
|
||
if ((iPtr->limit.active & TCL_LIMIT_TIME) &&
|
||
((iPtr->limit.timeGranularity == 1) ||
|
||
(ticker % iPtr->limit.timeGranularity == 0))) {
|
||
return 1;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitCheck --
|
||
*
|
||
* Check all currently set limits in the interpreter (where permitted by
|
||
* granularity). If a limit is exceeded, call its callbacks and, if the
|
||
* limit is still exceeded after the callbacks have run, make the
|
||
* interpreter generate an error that cannot be caught within the limited
|
||
* interpreter.
|
||
*
|
||
* Results:
|
||
* A Tcl result value (TCL_OK if no limit is exceeded, and TCL_ERROR if a
|
||
* limit has been exceeded).
|
||
*
|
||
* Side effects:
|
||
* May invoke system calls. May invoke other interpreters. May be
|
||
* reentrant. May put the interpreter into a state where it can no longer
|
||
* execute commands without outside intervention.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_LimitCheck(
|
||
Tcl_Interp *interp)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
int ticker = iPtr->limit.granularityTicker;
|
||
|
||
if (Tcl_InterpDeleted(interp)) {
|
||
return TCL_OK;
|
||
}
|
||
|
||
if ((iPtr->limit.active & TCL_LIMIT_COMMANDS) &&
|
||
((iPtr->limit.cmdGranularity == 1) ||
|
||
(ticker % iPtr->limit.cmdGranularity == 0)) &&
|
||
(iPtr->limit.cmdCount < iPtr->cmdCount)) {
|
||
iPtr->limit.exceeded |= TCL_LIMIT_COMMANDS;
|
||
Tcl_Preserve(interp);
|
||
RunLimitHandlers(iPtr->limit.cmdHandlers, interp);
|
||
if (iPtr->limit.cmdCount >= iPtr->cmdCount) {
|
||
iPtr->limit.exceeded &= ~TCL_LIMIT_COMMANDS;
|
||
} else if (iPtr->limit.exceeded & TCL_LIMIT_COMMANDS) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"command count limit exceeded", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "LIMIT", "COMMANDS", NULL);
|
||
Tcl_Release(interp);
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_Release(interp);
|
||
}
|
||
|
||
if ((iPtr->limit.active & TCL_LIMIT_TIME) &&
|
||
((iPtr->limit.timeGranularity == 1) ||
|
||
(ticker % iPtr->limit.timeGranularity == 0))) {
|
||
Tcl_Time now;
|
||
|
||
Tcl_GetTime(&now);
|
||
if (iPtr->limit.time.sec < now.sec ||
|
||
(iPtr->limit.time.sec == now.sec &&
|
||
iPtr->limit.time.usec < now.usec)) {
|
||
iPtr->limit.exceeded |= TCL_LIMIT_TIME;
|
||
Tcl_Preserve(interp);
|
||
RunLimitHandlers(iPtr->limit.timeHandlers, interp);
|
||
if (iPtr->limit.time.sec > now.sec ||
|
||
(iPtr->limit.time.sec == now.sec &&
|
||
iPtr->limit.time.usec >= now.usec)) {
|
||
iPtr->limit.exceeded &= ~TCL_LIMIT_TIME;
|
||
} else if (iPtr->limit.exceeded & TCL_LIMIT_TIME) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"time limit exceeded", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "LIMIT", "TIME", NULL);
|
||
Tcl_Release(interp);
|
||
return TCL_ERROR;
|
||
}
|
||
Tcl_Release(interp);
|
||
}
|
||
}
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* RunLimitHandlers --
|
||
*
|
||
* Invoke all the limit handlers in a list (for a particular limit).
|
||
* Note that no particular limit handler callback will be invoked
|
||
* reentrantly.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Depends on the limit handlers.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
RunLimitHandlers(
|
||
LimitHandler *handlerPtr,
|
||
Tcl_Interp *interp)
|
||
{
|
||
LimitHandler *nextPtr;
|
||
for (; handlerPtr!=NULL ; handlerPtr=nextPtr) {
|
||
if (handlerPtr->flags & (LIMIT_HANDLER_DELETED|LIMIT_HANDLER_ACTIVE)) {
|
||
/*
|
||
* Reentrant call or something seriously strange in the delete
|
||
* code.
|
||
*/
|
||
|
||
nextPtr = handlerPtr->nextPtr;
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
* Set the ACTIVE flag while running the limit handler itself so we
|
||
* cannot reentrantly call this handler and know to use the alternate
|
||
* method of deletion if necessary.
|
||
*/
|
||
|
||
handlerPtr->flags |= LIMIT_HANDLER_ACTIVE;
|
||
handlerPtr->handlerProc(handlerPtr->clientData, interp);
|
||
handlerPtr->flags &= ~LIMIT_HANDLER_ACTIVE;
|
||
|
||
/*
|
||
* Rediscover this value; it might have changed during the processing
|
||
* of a limit handler. We have to record it here because we might
|
||
* delete the structure below, and reading a value out of a deleted
|
||
* structure is unsafe (even if actually legal with some
|
||
* malloc()/free() implementations.)
|
||
*/
|
||
|
||
nextPtr = handlerPtr->nextPtr;
|
||
|
||
/*
|
||
* If we deleted the current handler while we were executing it, we
|
||
* will have spliced it out of the list and set the
|
||
* LIMIT_HANDLER_DELETED flag.
|
||
*/
|
||
|
||
if (handlerPtr->flags & LIMIT_HANDLER_DELETED) {
|
||
if (handlerPtr->deleteProc != NULL) {
|
||
handlerPtr->deleteProc(handlerPtr->clientData);
|
||
}
|
||
ckfree(handlerPtr);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitAddHandler --
|
||
*
|
||
* Add a callback handler for a particular resource limit.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Extends the internal linked list of handlers for a limit.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_LimitAddHandler(
|
||
Tcl_Interp *interp,
|
||
int type,
|
||
Tcl_LimitHandlerProc *handlerProc,
|
||
ClientData clientData,
|
||
Tcl_LimitHandlerDeleteProc *deleteProc)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
LimitHandler *handlerPtr;
|
||
|
||
/*
|
||
* Convert everything into a real deletion callback.
|
||
*/
|
||
|
||
if (deleteProc == (Tcl_LimitHandlerDeleteProc *) TCL_DYNAMIC) {
|
||
deleteProc = (Tcl_LimitHandlerDeleteProc *) Tcl_Free;
|
||
}
|
||
if (deleteProc == (Tcl_LimitHandlerDeleteProc *) TCL_STATIC) {
|
||
deleteProc = NULL;
|
||
}
|
||
|
||
/*
|
||
* Allocate a handler record.
|
||
*/
|
||
|
||
handlerPtr = ckalloc(sizeof(LimitHandler));
|
||
handlerPtr->flags = 0;
|
||
handlerPtr->handlerProc = handlerProc;
|
||
handlerPtr->clientData = clientData;
|
||
handlerPtr->deleteProc = deleteProc;
|
||
handlerPtr->prevPtr = NULL;
|
||
|
||
/*
|
||
* Prepend onto the front of the correct linked list.
|
||
*/
|
||
|
||
switch (type) {
|
||
case TCL_LIMIT_COMMANDS:
|
||
handlerPtr->nextPtr = iPtr->limit.cmdHandlers;
|
||
if (handlerPtr->nextPtr != NULL) {
|
||
handlerPtr->nextPtr->prevPtr = handlerPtr;
|
||
}
|
||
iPtr->limit.cmdHandlers = handlerPtr;
|
||
return;
|
||
|
||
case TCL_LIMIT_TIME:
|
||
handlerPtr->nextPtr = iPtr->limit.timeHandlers;
|
||
if (handlerPtr->nextPtr != NULL) {
|
||
handlerPtr->nextPtr->prevPtr = handlerPtr;
|
||
}
|
||
iPtr->limit.timeHandlers = handlerPtr;
|
||
return;
|
||
}
|
||
|
||
Tcl_Panic("unknown type of resource limit");
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitRemoveHandler --
|
||
*
|
||
* Remove a callback handler for a particular resource limit.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The handler is spliced out of the internal linked list for the limit,
|
||
* and if not currently being invoked, deleted. Otherwise it is just
|
||
* marked for deletion and removed when the limit handler has finished
|
||
* executing.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_LimitRemoveHandler(
|
||
Tcl_Interp *interp,
|
||
int type,
|
||
Tcl_LimitHandlerProc *handlerProc,
|
||
ClientData clientData)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
LimitHandler *handlerPtr;
|
||
|
||
switch (type) {
|
||
case TCL_LIMIT_COMMANDS:
|
||
handlerPtr = iPtr->limit.cmdHandlers;
|
||
break;
|
||
case TCL_LIMIT_TIME:
|
||
handlerPtr = iPtr->limit.timeHandlers;
|
||
break;
|
||
default:
|
||
Tcl_Panic("unknown type of resource limit");
|
||
return;
|
||
}
|
||
|
||
for (; handlerPtr!=NULL ; handlerPtr=handlerPtr->nextPtr) {
|
||
if ((handlerPtr->handlerProc != handlerProc) ||
|
||
(handlerPtr->clientData != clientData)) {
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
* We've found the handler to delete; mark it as doomed if not already
|
||
* so marked (which shouldn't actually happen).
|
||
*/
|
||
|
||
if (handlerPtr->flags & LIMIT_HANDLER_DELETED) {
|
||
return;
|
||
}
|
||
handlerPtr->flags |= LIMIT_HANDLER_DELETED;
|
||
|
||
/*
|
||
* Splice the handler out of the doubly-linked list.
|
||
*/
|
||
|
||
if (handlerPtr->prevPtr == NULL) {
|
||
switch (type) {
|
||
case TCL_LIMIT_COMMANDS:
|
||
iPtr->limit.cmdHandlers = handlerPtr->nextPtr;
|
||
break;
|
||
case TCL_LIMIT_TIME:
|
||
iPtr->limit.timeHandlers = handlerPtr->nextPtr;
|
||
break;
|
||
}
|
||
} else {
|
||
handlerPtr->prevPtr->nextPtr = handlerPtr->nextPtr;
|
||
}
|
||
if (handlerPtr->nextPtr != NULL) {
|
||
handlerPtr->nextPtr->prevPtr = handlerPtr->prevPtr;
|
||
}
|
||
|
||
/*
|
||
* If nothing is currently executing the handler, delete its client
|
||
* data and the overall handler structure now. Otherwise it will all
|
||
* go away when the handler returns.
|
||
*/
|
||
|
||
if (!(handlerPtr->flags & LIMIT_HANDLER_ACTIVE)) {
|
||
if (handlerPtr->deleteProc != NULL) {
|
||
handlerPtr->deleteProc(handlerPtr->clientData);
|
||
}
|
||
ckfree(handlerPtr);
|
||
}
|
||
return;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclLimitRemoveAllHandlers --
|
||
*
|
||
* Remove all limit callback handlers for an interpreter. This is invoked
|
||
* as part of deleting the interpreter.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Limit handlers are deleted or marked for deletion (as with
|
||
* Tcl_LimitRemoveHandler).
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
TclLimitRemoveAllHandlers(
|
||
Tcl_Interp *interp)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
LimitHandler *handlerPtr, *nextHandlerPtr;
|
||
|
||
/*
|
||
* Delete all command-limit handlers.
|
||
*/
|
||
|
||
for (handlerPtr=iPtr->limit.cmdHandlers, iPtr->limit.cmdHandlers=NULL;
|
||
handlerPtr!=NULL; handlerPtr=nextHandlerPtr) {
|
||
nextHandlerPtr = handlerPtr->nextPtr;
|
||
|
||
/*
|
||
* Do not delete here if it has already been marked for deletion.
|
||
*/
|
||
|
||
if (handlerPtr->flags & LIMIT_HANDLER_DELETED) {
|
||
continue;
|
||
}
|
||
handlerPtr->flags |= LIMIT_HANDLER_DELETED;
|
||
handlerPtr->prevPtr = NULL;
|
||
handlerPtr->nextPtr = NULL;
|
||
|
||
/*
|
||
* If nothing is currently executing the handler, delete its client
|
||
* data and the overall handler structure now. Otherwise it will all
|
||
* go away when the handler returns.
|
||
*/
|
||
|
||
if (!(handlerPtr->flags & LIMIT_HANDLER_ACTIVE)) {
|
||
if (handlerPtr->deleteProc != NULL) {
|
||
handlerPtr->deleteProc(handlerPtr->clientData);
|
||
}
|
||
ckfree(handlerPtr);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Delete all time-limit handlers.
|
||
*/
|
||
|
||
for (handlerPtr=iPtr->limit.timeHandlers, iPtr->limit.timeHandlers=NULL;
|
||
handlerPtr!=NULL; handlerPtr=nextHandlerPtr) {
|
||
nextHandlerPtr = handlerPtr->nextPtr;
|
||
|
||
/*
|
||
* Do not delete here if it has already been marked for deletion.
|
||
*/
|
||
|
||
if (handlerPtr->flags & LIMIT_HANDLER_DELETED) {
|
||
continue;
|
||
}
|
||
handlerPtr->flags |= LIMIT_HANDLER_DELETED;
|
||
handlerPtr->prevPtr = NULL;
|
||
handlerPtr->nextPtr = NULL;
|
||
|
||
/*
|
||
* If nothing is currently executing the handler, delete its client
|
||
* data and the overall handler structure now. Otherwise it will all
|
||
* go away when the handler returns.
|
||
*/
|
||
|
||
if (!(handlerPtr->flags & LIMIT_HANDLER_ACTIVE)) {
|
||
if (handlerPtr->deleteProc != NULL) {
|
||
handlerPtr->deleteProc(handlerPtr->clientData);
|
||
}
|
||
ckfree(handlerPtr);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Delete the timer callback that is used to trap limits that occur in
|
||
* [vwait]s...
|
||
*/
|
||
|
||
if (iPtr->limit.timeEvent != NULL) {
|
||
Tcl_DeleteTimerHandler(iPtr->limit.timeEvent);
|
||
iPtr->limit.timeEvent = NULL;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitTypeEnabled --
|
||
*
|
||
* Check whether a particular limit has been enabled for an interpreter.
|
||
*
|
||
* Results:
|
||
* A boolean value.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_LimitTypeEnabled(
|
||
Tcl_Interp *interp,
|
||
int type)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
return (iPtr->limit.active & type) != 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitTypeExceeded --
|
||
*
|
||
* Check whether a particular limit has been exceeded for an interpreter.
|
||
*
|
||
* Results:
|
||
* A boolean value (note that Tcl_LimitExceeded will always return
|
||
* non-zero when this function returns non-zero).
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_LimitTypeExceeded(
|
||
Tcl_Interp *interp,
|
||
int type)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
return (iPtr->limit.exceeded & type) != 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitTypeSet --
|
||
*
|
||
* Enable a particular limit for an interpreter.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The limit is turned on and will be checked in future at an interval
|
||
* determined by the frequency of calling of Tcl_LimitReady and the
|
||
* granularity of the limit in question.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_LimitTypeSet(
|
||
Tcl_Interp *interp,
|
||
int type)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
iPtr->limit.active |= type;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitTypeReset --
|
||
*
|
||
* Disable a particular limit for an interpreter.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The limit is disabled. If the limit was exceeded when this function
|
||
* was called, the limit will no longer be exceeded afterwards and the
|
||
* interpreter will be free to execute further scripts (assuming it isn't
|
||
* also deleted, of course).
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_LimitTypeReset(
|
||
Tcl_Interp *interp,
|
||
int type)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
iPtr->limit.active &= ~type;
|
||
iPtr->limit.exceeded &= ~type;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitSetCommands --
|
||
*
|
||
* Set the command limit for an interpreter.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Also resets whether the command limit was exceeded. This might permit
|
||
* a small amount of further execution in the interpreter even if the
|
||
* limit itself is theoretically exceeded.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_LimitSetCommands(
|
||
Tcl_Interp *interp,
|
||
int commandLimit)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
iPtr->limit.cmdCount = commandLimit;
|
||
iPtr->limit.exceeded &= ~TCL_LIMIT_COMMANDS;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitGetCommands --
|
||
*
|
||
* Get the number of commands that may be executed in the interpreter
|
||
* before the command-limit is reached.
|
||
*
|
||
* Results:
|
||
* An upper bound on the number of commands.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_LimitGetCommands(
|
||
Tcl_Interp *interp)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
return iPtr->limit.cmdCount;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitSetTime --
|
||
*
|
||
* Set the time limit for an interpreter by copying it from the value
|
||
* pointed to by the timeLimitPtr argument.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Also resets whether the time limit was exceeded. This might permit a
|
||
* small amount of further execution in the interpreter even if the limit
|
||
* itself is theoretically exceeded.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_LimitSetTime(
|
||
Tcl_Interp *interp,
|
||
Tcl_Time *timeLimitPtr)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
Tcl_Time nextMoment;
|
||
|
||
memcpy(&iPtr->limit.time, timeLimitPtr, sizeof(Tcl_Time));
|
||
if (iPtr->limit.timeEvent != NULL) {
|
||
Tcl_DeleteTimerHandler(iPtr->limit.timeEvent);
|
||
}
|
||
nextMoment.sec = timeLimitPtr->sec;
|
||
nextMoment.usec = timeLimitPtr->usec+10;
|
||
if (nextMoment.usec >= 1000000) {
|
||
nextMoment.sec++;
|
||
nextMoment.usec -= 1000000;
|
||
}
|
||
iPtr->limit.timeEvent = TclCreateAbsoluteTimerHandler(&nextMoment,
|
||
TimeLimitCallback, interp);
|
||
iPtr->limit.exceeded &= ~TCL_LIMIT_TIME;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TimeLimitCallback --
|
||
*
|
||
* Callback that allows time limits to be enforced even when doing a
|
||
* blocking wait for events.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* May put the interpreter into a state where it can no longer execute
|
||
* commands. May make callbacks into other interpreters.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
TimeLimitCallback(
|
||
ClientData clientData)
|
||
{
|
||
Tcl_Interp *interp = clientData;
|
||
Interp *iPtr = clientData;
|
||
int code;
|
||
|
||
Tcl_Preserve(interp);
|
||
iPtr->limit.timeEvent = NULL;
|
||
|
||
/*
|
||
* Must reset the granularity ticker here to force an immediate full
|
||
* check. This is OK because we're swallowing the cost in the overall cost
|
||
* of the event loop. [Bug 2891362]
|
||
*/
|
||
|
||
iPtr->limit.granularityTicker = 0;
|
||
|
||
code = Tcl_LimitCheck(interp);
|
||
if (code != TCL_OK) {
|
||
Tcl_AddErrorInfo(interp, "\n (while waiting for event)");
|
||
Tcl_BackgroundException(interp, code);
|
||
}
|
||
Tcl_Release(interp);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitGetTime --
|
||
*
|
||
* Get the current time limit.
|
||
*
|
||
* Results:
|
||
* The time limit (by it being copied into the variable pointed to by the
|
||
* timeLimitPtr).
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_LimitGetTime(
|
||
Tcl_Interp *interp,
|
||
Tcl_Time *timeLimitPtr)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
memcpy(timeLimitPtr, &iPtr->limit.time, sizeof(Tcl_Time));
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitSetGranularity --
|
||
*
|
||
* Set the granularity divisor (which must be positive) for a particular
|
||
* limit.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The granularity is updated.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
Tcl_LimitSetGranularity(
|
||
Tcl_Interp *interp,
|
||
int type,
|
||
int granularity)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
if (granularity < 1) {
|
||
Tcl_Panic("limit granularity must be positive");
|
||
}
|
||
|
||
switch (type) {
|
||
case TCL_LIMIT_COMMANDS:
|
||
iPtr->limit.cmdGranularity = granularity;
|
||
return;
|
||
case TCL_LIMIT_TIME:
|
||
iPtr->limit.timeGranularity = granularity;
|
||
return;
|
||
}
|
||
Tcl_Panic("unknown type of resource limit");
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_LimitGetGranularity --
|
||
*
|
||
* Get the granularity divisor for a particular limit.
|
||
*
|
||
* Results:
|
||
* The granularity divisor for the given limit.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_LimitGetGranularity(
|
||
Tcl_Interp *interp,
|
||
int type)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
switch (type) {
|
||
case TCL_LIMIT_COMMANDS:
|
||
return iPtr->limit.cmdGranularity;
|
||
case TCL_LIMIT_TIME:
|
||
return iPtr->limit.timeGranularity;
|
||
}
|
||
Tcl_Panic("unknown type of resource limit");
|
||
return -1; /* NOT REACHED */
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DeleteScriptLimitCallback --
|
||
*
|
||
* Callback for when a script limit (a limit callback implemented as a
|
||
* Tcl script in a parent interpreter, as set up from Tcl) is deleted.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The reference to the script callback from the controlling interpreter
|
||
* is removed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DeleteScriptLimitCallback(
|
||
ClientData clientData)
|
||
{
|
||
ScriptLimitCallback *limitCBPtr = clientData;
|
||
|
||
Tcl_DecrRefCount(limitCBPtr->scriptObj);
|
||
if (limitCBPtr->entryPtr != NULL) {
|
||
Tcl_DeleteHashEntry(limitCBPtr->entryPtr);
|
||
}
|
||
ckfree(limitCBPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* CallScriptLimitCallback --
|
||
*
|
||
* Invoke a script limit callback. Used to implement limit callbacks set
|
||
* at the Tcl level on child interpreters.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Depends on the callback script. Errors are reported as background
|
||
* errors.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
CallScriptLimitCallback(
|
||
ClientData clientData,
|
||
Tcl_Interp *interp) /* Interpreter which failed the limit */
|
||
{
|
||
ScriptLimitCallback *limitCBPtr = clientData;
|
||
int code;
|
||
|
||
if (Tcl_InterpDeleted(limitCBPtr->interp)) {
|
||
return;
|
||
}
|
||
Tcl_Preserve(limitCBPtr->interp);
|
||
code = Tcl_EvalObjEx(limitCBPtr->interp, limitCBPtr->scriptObj,
|
||
TCL_EVAL_GLOBAL);
|
||
if (code != TCL_OK && !Tcl_InterpDeleted(limitCBPtr->interp)) {
|
||
Tcl_BackgroundException(limitCBPtr->interp, code);
|
||
}
|
||
Tcl_Release(limitCBPtr->interp);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* SetScriptLimitCallback --
|
||
*
|
||
* Install (or remove, if scriptObj is NULL) a limit callback script that
|
||
* is called when the target interpreter exceeds the type of limit
|
||
* specified. Each interpreter may only have one callback set on another
|
||
* interpreter through this mechanism (though as many interpreters may be
|
||
* limited as the programmer chooses overall).
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* A limit callback implemented as an invokation of a Tcl script in
|
||
* another interpreter is either installed or removed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
SetScriptLimitCallback(
|
||
Tcl_Interp *interp,
|
||
int type,
|
||
Tcl_Interp *targetInterp,
|
||
Tcl_Obj *scriptObj)
|
||
{
|
||
ScriptLimitCallback *limitCBPtr;
|
||
Tcl_HashEntry *hashPtr;
|
||
int isNew;
|
||
ScriptLimitCallbackKey key;
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
if (interp == targetInterp) {
|
||
Tcl_Panic("installing limit callback to the limited interpreter");
|
||
}
|
||
|
||
key.interp = targetInterp;
|
||
key.type = type;
|
||
|
||
if (scriptObj == NULL) {
|
||
hashPtr = Tcl_FindHashEntry(&iPtr->limit.callbacks, (char *) &key);
|
||
if (hashPtr != NULL) {
|
||
Tcl_LimitRemoveHandler(targetInterp, type, CallScriptLimitCallback,
|
||
Tcl_GetHashValue(hashPtr));
|
||
}
|
||
return;
|
||
}
|
||
|
||
hashPtr = Tcl_CreateHashEntry(&iPtr->limit.callbacks, &key,
|
||
&isNew);
|
||
if (!isNew) {
|
||
limitCBPtr = Tcl_GetHashValue(hashPtr);
|
||
limitCBPtr->entryPtr = NULL;
|
||
Tcl_LimitRemoveHandler(targetInterp, type, CallScriptLimitCallback,
|
||
limitCBPtr);
|
||
}
|
||
|
||
limitCBPtr = ckalloc(sizeof(ScriptLimitCallback));
|
||
limitCBPtr->interp = interp;
|
||
limitCBPtr->scriptObj = scriptObj;
|
||
limitCBPtr->entryPtr = hashPtr;
|
||
limitCBPtr->type = type;
|
||
Tcl_IncrRefCount(scriptObj);
|
||
|
||
Tcl_LimitAddHandler(targetInterp, type, CallScriptLimitCallback,
|
||
limitCBPtr, DeleteScriptLimitCallback);
|
||
Tcl_SetHashValue(hashPtr, limitCBPtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclRemoveScriptLimitCallbacks --
|
||
*
|
||
* Remove all script-implemented limit callbacks that make calls back
|
||
* into the given interpreter. This invoked as part of deleting an
|
||
* interpreter.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The script limit callbacks are removed or marked for later removal.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
TclRemoveScriptLimitCallbacks(
|
||
Tcl_Interp *interp)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
Tcl_HashEntry *hashPtr;
|
||
Tcl_HashSearch search;
|
||
ScriptLimitCallbackKey *keyPtr;
|
||
|
||
hashPtr = Tcl_FirstHashEntry(&iPtr->limit.callbacks, &search);
|
||
while (hashPtr != NULL) {
|
||
keyPtr = (ScriptLimitCallbackKey *)
|
||
Tcl_GetHashKey(&iPtr->limit.callbacks, hashPtr);
|
||
Tcl_LimitRemoveHandler(keyPtr->interp, keyPtr->type,
|
||
CallScriptLimitCallback, Tcl_GetHashValue(hashPtr));
|
||
hashPtr = Tcl_NextHashEntry(&search);
|
||
}
|
||
Tcl_DeleteHashTable(&iPtr->limit.callbacks);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclInitLimitSupport --
|
||
*
|
||
* Initialise all the parts of the interpreter relating to resource limit
|
||
* management. This allows an interpreter to both have limits set upon
|
||
* itself and set limits upon other interpreters.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The resource limit subsystem is initialised for the interpreter.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
TclInitLimitSupport(
|
||
Tcl_Interp *interp)
|
||
{
|
||
Interp *iPtr = (Interp *) interp;
|
||
|
||
iPtr->limit.active = 0;
|
||
iPtr->limit.granularityTicker = 0;
|
||
iPtr->limit.exceeded = 0;
|
||
iPtr->limit.cmdCount = 0;
|
||
iPtr->limit.cmdHandlers = NULL;
|
||
iPtr->limit.cmdGranularity = 1;
|
||
memset(&iPtr->limit.time, 0, sizeof(Tcl_Time));
|
||
iPtr->limit.timeHandlers = NULL;
|
||
iPtr->limit.timeEvent = NULL;
|
||
iPtr->limit.timeGranularity = 10;
|
||
Tcl_InitHashTable(&iPtr->limit.callbacks,
|
||
sizeof(ScriptLimitCallbackKey)/sizeof(int));
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* InheritLimitsFromParent --
|
||
*
|
||
* Derive the interpreter limit configuration for a child interpreter
|
||
* from the limit config for the parent.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The child interpreter limits are set so that if the parent has a
|
||
* limit, it may not exceed it by handing off work to child interpreters.
|
||
* Note that this does not transfer limit callbacks from the parent to
|
||
* the child.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
InheritLimitsFromParent(
|
||
Tcl_Interp *childInterp,
|
||
Tcl_Interp *parentInterp)
|
||
{
|
||
Interp *childPtr = (Interp *) childInterp;
|
||
Interp *parentPtr = (Interp *) parentInterp;
|
||
|
||
if (parentPtr->limit.active & TCL_LIMIT_COMMANDS) {
|
||
childPtr->limit.active |= TCL_LIMIT_COMMANDS;
|
||
childPtr->limit.cmdCount = 0;
|
||
childPtr->limit.cmdGranularity = parentPtr->limit.cmdGranularity;
|
||
}
|
||
if (parentPtr->limit.active & TCL_LIMIT_TIME) {
|
||
childPtr->limit.active |= TCL_LIMIT_TIME;
|
||
memcpy(&childPtr->limit.time, &parentPtr->limit.time,
|
||
sizeof(Tcl_Time));
|
||
childPtr->limit.timeGranularity = parentPtr->limit.timeGranularity;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildCommandLimitCmd --
|
||
*
|
||
* Implementation of the [interp limit $i commands] and [$i limit
|
||
* commands] subcommands. See the interp manual page for a full
|
||
* description.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Depends on the arguments.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildCommandLimitCmd(
|
||
Tcl_Interp *interp, /* Current interpreter. */
|
||
Tcl_Interp *childInterp, /* Interpreter being adjusted. */
|
||
int consumedObjc, /* Number of args already parsed. */
|
||
int objc, /* Total number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument objects. */
|
||
{
|
||
static const char *const options[] = {
|
||
"-command", "-granularity", "-value", NULL
|
||
};
|
||
enum Options {
|
||
OPT_CMD, OPT_GRAN, OPT_VAL
|
||
};
|
||
Interp *iPtr = (Interp *) interp;
|
||
int index;
|
||
ScriptLimitCallbackKey key;
|
||
ScriptLimitCallback *limitCBPtr;
|
||
Tcl_HashEntry *hPtr;
|
||
|
||
/*
|
||
* First, ensure that we are not reading or writing the calling
|
||
* interpreter's limits; it may only manipulate its children. Note that
|
||
* the low level API enforces this with Tcl_Panic, which we want to
|
||
* avoid. [Bug 3398794]
|
||
*/
|
||
|
||
if (interp == childInterp) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"limits on current interpreter inaccessible", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "SELF", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (objc == consumedObjc) {
|
||
Tcl_Obj *dictPtr;
|
||
|
||
TclNewObj(dictPtr);
|
||
key.interp = childInterp;
|
||
key.type = TCL_LIMIT_COMMANDS;
|
||
hPtr = Tcl_FindHashEntry(&iPtr->limit.callbacks, (char *) &key);
|
||
if (hPtr != NULL) {
|
||
limitCBPtr = Tcl_GetHashValue(hPtr);
|
||
if (limitCBPtr != NULL && limitCBPtr->scriptObj != NULL) {
|
||
Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[0], -1),
|
||
limitCBPtr->scriptObj);
|
||
} else {
|
||
goto putEmptyCommandInDict;
|
||
}
|
||
} else {
|
||
Tcl_Obj *empty;
|
||
|
||
putEmptyCommandInDict:
|
||
TclNewObj(empty);
|
||
Tcl_DictObjPut(NULL, dictPtr,
|
||
Tcl_NewStringObj(options[0], -1), empty);
|
||
}
|
||
Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[1], -1),
|
||
Tcl_NewIntObj(Tcl_LimitGetGranularity(childInterp,
|
||
TCL_LIMIT_COMMANDS)));
|
||
|
||
if (Tcl_LimitTypeEnabled(childInterp, TCL_LIMIT_COMMANDS)) {
|
||
Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[2], -1),
|
||
Tcl_NewIntObj(Tcl_LimitGetCommands(childInterp)));
|
||
} else {
|
||
Tcl_Obj *empty;
|
||
|
||
TclNewObj(empty);
|
||
Tcl_DictObjPut(NULL, dictPtr,
|
||
Tcl_NewStringObj(options[2], -1), empty);
|
||
}
|
||
Tcl_SetObjResult(interp, dictPtr);
|
||
return TCL_OK;
|
||
} else if (objc == consumedObjc+1) {
|
||
if (Tcl_GetIndexFromObj(interp, objv[consumedObjc], options, "option",
|
||
0, &index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
switch ((enum Options) index) {
|
||
case OPT_CMD:
|
||
key.interp = childInterp;
|
||
key.type = TCL_LIMIT_COMMANDS;
|
||
hPtr = Tcl_FindHashEntry(&iPtr->limit.callbacks, (char *) &key);
|
||
if (hPtr != NULL) {
|
||
limitCBPtr = Tcl_GetHashValue(hPtr);
|
||
if (limitCBPtr != NULL && limitCBPtr->scriptObj != NULL) {
|
||
Tcl_SetObjResult(interp, limitCBPtr->scriptObj);
|
||
}
|
||
}
|
||
break;
|
||
case OPT_GRAN:
|
||
Tcl_SetObjResult(interp, Tcl_NewIntObj(
|
||
Tcl_LimitGetGranularity(childInterp, TCL_LIMIT_COMMANDS)));
|
||
break;
|
||
case OPT_VAL:
|
||
if (Tcl_LimitTypeEnabled(childInterp, TCL_LIMIT_COMMANDS)) {
|
||
Tcl_SetObjResult(interp,
|
||
Tcl_NewIntObj(Tcl_LimitGetCommands(childInterp)));
|
||
}
|
||
break;
|
||
}
|
||
return TCL_OK;
|
||
} else if ((objc-consumedObjc) & 1 /* isOdd(objc-consumedObjc) */) {
|
||
Tcl_WrongNumArgs(interp, consumedObjc, objv, "?-option value ...?");
|
||
return TCL_ERROR;
|
||
} else {
|
||
int i, scriptLen = 0, limitLen = 0;
|
||
Tcl_Obj *scriptObj = NULL, *granObj = NULL, *limitObj = NULL;
|
||
int gran = 0, limit = 0;
|
||
|
||
for (i=consumedObjc ; i<objc ; i+=2) {
|
||
if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", 0,
|
||
&index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
switch ((enum Options) index) {
|
||
case OPT_CMD:
|
||
scriptObj = objv[i+1];
|
||
(void) Tcl_GetStringFromObj(objv[i+1], &scriptLen);
|
||
break;
|
||
case OPT_GRAN:
|
||
granObj = objv[i+1];
|
||
if (TclGetIntFromObj(interp, objv[i+1], &gran) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (gran < 1) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"granularity must be at least 1", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"BADVALUE", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
break;
|
||
case OPT_VAL:
|
||
limitObj = objv[i+1];
|
||
(void) Tcl_GetStringFromObj(objv[i+1], &limitLen);
|
||
if (limitLen == 0) {
|
||
break;
|
||
}
|
||
if (TclGetIntFromObj(interp, objv[i+1], &limit) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (limit < 0) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"command limit value must be at least 0", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"BADVALUE", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
if (scriptObj != NULL) {
|
||
SetScriptLimitCallback(interp, TCL_LIMIT_COMMANDS, childInterp,
|
||
(scriptLen > 0 ? scriptObj : NULL));
|
||
}
|
||
if (granObj != NULL) {
|
||
Tcl_LimitSetGranularity(childInterp, TCL_LIMIT_COMMANDS, gran);
|
||
}
|
||
if (limitObj != NULL) {
|
||
if (limitLen > 0) {
|
||
Tcl_LimitSetCommands(childInterp, limit);
|
||
Tcl_LimitTypeSet(childInterp, TCL_LIMIT_COMMANDS);
|
||
} else {
|
||
Tcl_LimitTypeReset(childInterp, TCL_LIMIT_COMMANDS);
|
||
}
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ChildTimeLimitCmd --
|
||
*
|
||
* Implementation of the [interp limit $i time] and [$i limit time]
|
||
* subcommands. See the interp manual page for a full description.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* Depends on the arguments.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ChildTimeLimitCmd(
|
||
Tcl_Interp *interp, /* Current interpreter. */
|
||
Tcl_Interp *childInterp, /* Interpreter being adjusted. */
|
||
int consumedObjc, /* Number of args already parsed. */
|
||
int objc, /* Total number of arguments. */
|
||
Tcl_Obj *const objv[]) /* Argument objects. */
|
||
{
|
||
static const char *const options[] = {
|
||
"-command", "-granularity", "-milliseconds", "-seconds", NULL
|
||
};
|
||
enum Options {
|
||
OPT_CMD, OPT_GRAN, OPT_MILLI, OPT_SEC
|
||
};
|
||
Interp *iPtr = (Interp *) interp;
|
||
int index;
|
||
ScriptLimitCallbackKey key;
|
||
ScriptLimitCallback *limitCBPtr;
|
||
Tcl_HashEntry *hPtr;
|
||
|
||
/*
|
||
* First, ensure that we are not reading or writing the calling
|
||
* interpreter's limits; it may only manipulate its children. Note that
|
||
* the low level API enforces this with Tcl_Panic, which we want to
|
||
* avoid. [Bug 3398794]
|
||
*/
|
||
|
||
if (interp == childInterp) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"limits on current interpreter inaccessible", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "SELF", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if (objc == consumedObjc) {
|
||
Tcl_Obj *dictPtr;
|
||
|
||
TclNewObj(dictPtr);
|
||
key.interp = childInterp;
|
||
key.type = TCL_LIMIT_TIME;
|
||
hPtr = Tcl_FindHashEntry(&iPtr->limit.callbacks, (char *) &key);
|
||
if (hPtr != NULL) {
|
||
limitCBPtr = Tcl_GetHashValue(hPtr);
|
||
if (limitCBPtr != NULL && limitCBPtr->scriptObj != NULL) {
|
||
Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[0], -1),
|
||
limitCBPtr->scriptObj);
|
||
} else {
|
||
goto putEmptyCommandInDict;
|
||
}
|
||
} else {
|
||
Tcl_Obj *empty;
|
||
putEmptyCommandInDict:
|
||
TclNewObj(empty);
|
||
Tcl_DictObjPut(NULL, dictPtr,
|
||
Tcl_NewStringObj(options[0], -1), empty);
|
||
}
|
||
Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[1], -1),
|
||
Tcl_NewIntObj(Tcl_LimitGetGranularity(childInterp,
|
||
TCL_LIMIT_TIME)));
|
||
|
||
if (Tcl_LimitTypeEnabled(childInterp, TCL_LIMIT_TIME)) {
|
||
Tcl_Time limitMoment;
|
||
|
||
Tcl_LimitGetTime(childInterp, &limitMoment);
|
||
Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[2], -1),
|
||
Tcl_NewLongObj(limitMoment.usec/1000));
|
||
Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[3], -1),
|
||
Tcl_NewLongObj(limitMoment.sec));
|
||
} else {
|
||
Tcl_Obj *empty;
|
||
|
||
TclNewObj(empty);
|
||
Tcl_DictObjPut(NULL, dictPtr,
|
||
Tcl_NewStringObj(options[2], -1), empty);
|
||
Tcl_DictObjPut(NULL, dictPtr,
|
||
Tcl_NewStringObj(options[3], -1), empty);
|
||
}
|
||
Tcl_SetObjResult(interp, dictPtr);
|
||
return TCL_OK;
|
||
} else if (objc == consumedObjc+1) {
|
||
if (Tcl_GetIndexFromObj(interp, objv[consumedObjc], options, "option",
|
||
0, &index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
switch ((enum Options) index) {
|
||
case OPT_CMD:
|
||
key.interp = childInterp;
|
||
key.type = TCL_LIMIT_TIME;
|
||
hPtr = Tcl_FindHashEntry(&iPtr->limit.callbacks, (char *) &key);
|
||
if (hPtr != NULL) {
|
||
limitCBPtr = Tcl_GetHashValue(hPtr);
|
||
if (limitCBPtr != NULL && limitCBPtr->scriptObj != NULL) {
|
||
Tcl_SetObjResult(interp, limitCBPtr->scriptObj);
|
||
}
|
||
}
|
||
break;
|
||
case OPT_GRAN:
|
||
Tcl_SetObjResult(interp, Tcl_NewIntObj(
|
||
Tcl_LimitGetGranularity(childInterp, TCL_LIMIT_TIME)));
|
||
break;
|
||
case OPT_MILLI:
|
||
if (Tcl_LimitTypeEnabled(childInterp, TCL_LIMIT_TIME)) {
|
||
Tcl_Time limitMoment;
|
||
|
||
Tcl_LimitGetTime(childInterp, &limitMoment);
|
||
Tcl_SetObjResult(interp,
|
||
Tcl_NewLongObj(limitMoment.usec/1000));
|
||
}
|
||
break;
|
||
case OPT_SEC:
|
||
if (Tcl_LimitTypeEnabled(childInterp, TCL_LIMIT_TIME)) {
|
||
Tcl_Time limitMoment;
|
||
|
||
Tcl_LimitGetTime(childInterp, &limitMoment);
|
||
Tcl_SetObjResult(interp, Tcl_NewLongObj(limitMoment.sec));
|
||
}
|
||
break;
|
||
}
|
||
return TCL_OK;
|
||
} else if ((objc-consumedObjc) & 1 /* isOdd(objc-consumedObjc) */) {
|
||
Tcl_WrongNumArgs(interp, consumedObjc, objv, "?-option value ...?");
|
||
return TCL_ERROR;
|
||
} else {
|
||
int i, scriptLen = 0, milliLen = 0, secLen = 0;
|
||
Tcl_Obj *scriptObj = NULL, *granObj = NULL;
|
||
Tcl_Obj *milliObj = NULL, *secObj = NULL;
|
||
int gran = 0;
|
||
Tcl_Time limitMoment;
|
||
int tmp;
|
||
|
||
Tcl_LimitGetTime(childInterp, &limitMoment);
|
||
for (i=consumedObjc ; i<objc ; i+=2) {
|
||
if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", 0,
|
||
&index) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
switch ((enum Options) index) {
|
||
case OPT_CMD:
|
||
scriptObj = objv[i+1];
|
||
(void) Tcl_GetStringFromObj(objv[i+1], &scriptLen);
|
||
break;
|
||
case OPT_GRAN:
|
||
granObj = objv[i+1];
|
||
if (TclGetIntFromObj(interp, objv[i+1], &gran) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (gran < 1) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"granularity must be at least 1", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"BADVALUE", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
break;
|
||
case OPT_MILLI:
|
||
milliObj = objv[i+1];
|
||
(void) Tcl_GetStringFromObj(objv[i+1], &milliLen);
|
||
if (milliLen == 0) {
|
||
break;
|
||
}
|
||
if (TclGetIntFromObj(interp, objv[i+1], &tmp) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (tmp < 0) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"milliseconds must be at least 0", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"BADVALUE", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
limitMoment.usec = ((long) tmp)*1000;
|
||
break;
|
||
case OPT_SEC:
|
||
secObj = objv[i+1];
|
||
(void) Tcl_GetStringFromObj(objv[i+1], &secLen);
|
||
if (secLen == 0) {
|
||
break;
|
||
}
|
||
if (TclGetIntFromObj(interp, objv[i+1], &tmp) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
if (tmp < 0) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"seconds must be at least 0", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"BADVALUE", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
limitMoment.sec = tmp;
|
||
break;
|
||
}
|
||
}
|
||
if (milliObj != NULL || secObj != NULL) {
|
||
if (milliObj != NULL) {
|
||
/*
|
||
* Setting -milliseconds but clearing -seconds, or resetting
|
||
* -milliseconds but not resetting -seconds? Bad voodoo!
|
||
*/
|
||
|
||
if (secObj != NULL && secLen == 0 && milliLen > 0) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"may only set -milliseconds if -seconds is not "
|
||
"also being reset", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"BADUSAGE", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if (milliLen == 0 && (secObj == NULL || secLen > 0)) {
|
||
Tcl_SetObjResult(interp, Tcl_NewStringObj(
|
||
"may only reset -milliseconds if -seconds is "
|
||
"also being reset", -1));
|
||
Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP",
|
||
"BADUSAGE", NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
}
|
||
|
||
if (milliLen > 0 || secLen > 0) {
|
||
/*
|
||
* Force usec to be in range [0..1000000), possibly
|
||
* incrementing sec in the process. This makes it much easier
|
||
* for people to write scripts that do small time increments.
|
||
*/
|
||
|
||
limitMoment.sec += limitMoment.usec / 1000000;
|
||
limitMoment.usec %= 1000000;
|
||
|
||
Tcl_LimitSetTime(childInterp, &limitMoment);
|
||
Tcl_LimitTypeSet(childInterp, TCL_LIMIT_TIME);
|
||
} else {
|
||
Tcl_LimitTypeReset(childInterp, TCL_LIMIT_TIME);
|
||
}
|
||
}
|
||
if (scriptObj != NULL) {
|
||
SetScriptLimitCallback(interp, TCL_LIMIT_TIME, childInterp,
|
||
(scriptLen > 0 ? scriptObj : NULL));
|
||
}
|
||
if (granObj != NULL) {
|
||
Tcl_LimitSetGranularity(childInterp, TCL_LIMIT_TIME, gran);
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Local Variables:
|
||
* mode: c
|
||
* c-basic-offset: 4
|
||
* fill-column: 78
|
||
* End:
|
||
*/
|