169 lines
3.6 KiB
C
169 lines
3.6 KiB
C
/* $Xorg: lock.c,v 1.4 2001/02/09 02:05:59 xorgcvs Exp $ */
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/******************************************************************************
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Copyright 1994, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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******************************************************************************/
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/* $XFree86: xc/programs/xsm/lock.c,v 3.4 2001/12/14 20:02:25 dawes Exp $ */
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#include "xsm.h"
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#include "lock.h"
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#include "choose.h"
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#include <sys/types.h>
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static char *
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GetPath(void)
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{
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char *path = (char *) getenv ("SM_SAVE_DIR");
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if (!path)
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{
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path = (char *) getenv ("HOME");
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if (!path)
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path = ".";
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}
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return (path);
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}
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Status
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LockSession(char *session_name, Bool write_id)
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{
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char *path;
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char lock_file[PATH_MAX];
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char temp_lock_file[PATH_MAX];
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Status status;
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int fd;
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path = GetPath ();
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#ifndef __UNIXOS2__
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sprintf (lock_file, "%s/.XSMlock-%s", path, session_name);
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sprintf (temp_lock_file, "%s/.XSMtlock-%s", path, session_name);
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#else
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sprintf (temp_lock_file, "%s/%s.slk", path, session_name);
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#endif
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if ((fd = creat (temp_lock_file, 0444)) < 0)
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return (0);
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if ((write_id &&
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(write (fd, networkIds, strlen (networkIds)) != strlen (networkIds))) ||
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(write (fd, "\n", 1) != 1))
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{
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close (fd);
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return (0);
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}
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close (fd);
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#ifndef __UNIXOS2__
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status = 1;
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if (link (temp_lock_file, lock_file) < 0)
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status = 0;
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if (unlink (temp_lock_file) < 0)
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status = 0;
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#else
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status = 0;
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#endif
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return (status);
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}
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void
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UnlockSession(char *session_name)
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{
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char *path;
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char lock_file[PATH_MAX];
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path = GetPath ();
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sprintf (lock_file, "%s/.XSMlock-%s", path, session_name);
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unlink (lock_file);
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}
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char *
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GetLockId(char *session_name)
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{
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char *path;
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FILE *fp;
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char lock_file[PATH_MAX];
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char buf[256];
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char *ret;
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path = GetPath ();
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sprintf (lock_file, "%s/.XSMlock-%s", path, session_name);
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if ((fp = fopen (lock_file, "r")) == NULL)
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{
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return (NULL);
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}
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buf[0] = '\0';
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fscanf (fp, "%s\n", buf);
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ret = XtNewString (buf);
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fclose (fp);
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return (ret);
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}
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Bool
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CheckSessionLocked(char *session_name, Bool get_id, char **id_ret)
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{
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if (get_id)
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*id_ret = GetLockId (session_name);
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if (!LockSession (session_name, False))
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return (1);
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UnlockSession (session_name);
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return (0);
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}
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void
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UnableToLockSession(char *session_name)
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{
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/*
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* We should popup a dialog here giving error.
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*/
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#ifdef XKB
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XkbStdBell(XtDisplay(topLevel),XtWindow(topLevel),0,XkbBI_Failure);
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#else
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XBell (XtDisplay (topLevel), 0);
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#endif
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sleep (2);
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ChooseSession ();
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}
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