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remove some of the wierder code 

Signed-off-by: Jeff Carr <jcarr@wit.com>
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Jeff Carr 2024-03-09 17:46:36 -06:00
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If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

8
LICENSE.md
View File

@ -1,8 +0,0 @@
GNU Lesser General Public License (LGPL)
I don't want it to be possible to make closed source forks of this.
If you need to use this in a proprietary GO application, then
compile this as a plugin. The BSD license is bad for core GO libraries.
(GO now supports plugins as of version 1.8)
https://medium.com/@henvic/opensource-and-go-what-license-f6b36c201854

11
example1/Makefile
View File

@ -1,11 +0,0 @@
all:
# go build
GO111MODULE="off" go run main.go
goimports:
goimports -w *.go
redomod:
rm -f go.*
GO111MODULE= go mod init
GO111MODULE= go mod tidy

43
example1/main.go
View File

@ -1,43 +0,0 @@
package main
/*
import "log"
import "reflect"
*/
import "os"
// import "github.com/davecgh/go-spew/spew"
import "go.wit.com/lib/gui/shell"
func main() {
shell.Run("ls /tmp")
shell.Run("ping -c 3 localhost")
// slow down the polling to every 2 seconds
shell.SetDelayInMsec(2000)
shell.Run("ping -c 4 localhost")
// capture ping output into a file
fout, _ := os.Create("/tmp/example1.ping.stdout")
ferr, _ := os.Create("/tmp/example1.ping.stderr")
shell.SetStdout(fout)
shell.SetStderr(ferr)
shell.Run("ping -c 5 localhost")
// turn out process exit debugging
shell.SpewOn()
fout, _ = os.Create("/tmp/example1.fail.stdout")
ferr, _ = os.Create("/tmp/example1.fail.stderr")
shell.SetStdout(fout)
shell.SetStderr(ferr)
// TODO: this might not be working
// check error handling
shell.Run("ls /tmpthisisnothere")
}

3
example2/Makefile
View File

@ -1,3 +0,0 @@
all:
# go build
GO111MODULE="off" go run main.go

11
example2/main.go
View File

@ -1,11 +0,0 @@
package main
import "log"
// import "fmt"
import "go.wit.com/lib/gui/shell"
func main() {
err := shell.Run("cat /etc/issue")
log.Println("cat /etc/issue returned", err)
// fmt.Print(output)
}

27
linux.go
View File

@ -1,27 +0,0 @@
//go:build linux && go1.7
// +build linux,go1.7
// put stuff in here that you only want compiled under linux
package shell
import (
"log"
"os"
"os/signal"
"syscall"
"github.com/wercker/journalhook"
)
var sigChan chan os.Signal
func handleSignal(err interface{}, ret int) {
log.Println("handleSignal() only should be compiled on linux")
sigChan = make(chan os.Signal, 3)
signal.Notify(sigChan, syscall.SIGUSR1)
}
func UseJournalctl() {
journalhook.Enable()
}

0
nohup.out
View File

161
run.go
View File

@ -1,18 +1,11 @@
package shell package shell
import ( import (
"bufio"
"bytes"
"errors" "errors"
"fmt"
"io"
"os" "os"
"os/exec" "os/exec"
"strings" "strings"
"syscall" "syscall"
"time"
"github.com/svent/go-nbreader"
"go.wit.com/log" "go.wit.com/log"
) )
@ -113,160 +106,6 @@ func RunPath(path string, args []string) *RunResult {
return r return r
} }
func (cmd *OldShell) Run(cmdline string) string {
cmd.InitProcess(cmdline)
if cmd.Error != nil {
return ""
}
cmd.Exec(cmdline)
return Chomp(cmd.Buffer)
}
func (cmd *OldShell) InitProcess(cmdline string) {
log.Log(RUN, "shell.InitProcess() START "+cmdline)
cmd.Cmdline = Chomp(cmdline) // this is like 'chomp' in perl
cmdArgs := strings.Fields(cmd.Cmdline)
if len(cmdArgs) == 0 {
cmd.Error = fmt.Errorf("cmdline == ''")
cmd.Done = true
return
}
if cmdArgs[0] == "cd" {
if len(cmdArgs) > 1 {
log.Log(RUN, "os.Chdir()", cmd)
os.Chdir(cmdArgs[1])
}
handleError(nil, 0)
cmd.Done = true
return
}
cmd.Process = exec.Command(cmdArgs[0], cmdArgs[1:len(cmdArgs)]...)
}
func (cmd *OldShell) FileCreate(out string) {
var newfile File
var iof io.ReadCloser
if out == "STDOUT" {
iof, _ = cmd.Process.StdoutPipe()
} else {
iof, _ = cmd.Process.StderrPipe()
}
newfile.Fio = iof
newfile.Fbufio = bufio.NewReader(iof)
newfile.Fnbreader = nbreader.NewNBReader(newfile.Fbufio, 1024)
if out == "STDOUT" {
cmd.STDOUT = &newfile
} else {
cmd.STDERR = &newfile
}
}
// NOTE: this might cause problems:
// always remove the newlines at the end ?
func (cmd *OldShell) Exec(cmdline string) {
log.Log(RUN, "shell.Run() START "+cmdline)
cmd.InitProcess(cmdline)
if cmd.Error != nil {
return
}
cmd.FileCreate("STDOUT")
cmd.FileCreate("STDERR")
cmd.Process.Start()
// TODO; 'goroutine' both of these
// and make your own wait that will make sure
// the process is then done and run process.Wait()
go cmd.Capture(cmd.STDERR)
cmd.Capture(cmd.STDOUT)
// wait until the process exists
// https://golang.org/pkg/os/exec/#Cmd.Wait
// What should happen here, before calling Wait()
// is checks to make sure the READERS() on STDOUT and STDERR are done
err := cmd.Process.Wait()
// time.Sleep(2 * time.Second) // putting this here doesn't help STDOUT flush()
if err != nil {
cmd.Fail = true
cmd.Error = err
log.Log(RUN, "process.Wait() END err =", err.Error())
} else {
log.Log(RUN, "process.Wait() END")
}
return
}
// nonblocking read until file errors
func (cmd *OldShell) Capture(f *File) {
log.Log(RUN, "nbrREADER() START")
if cmd.Buffer == nil {
cmd.Buffer = new(bytes.Buffer)
}
if cmd.Buffer == nil {
f.Dead = false
cmd.Error = fmt.Errorf("could not make buffer")
log.Error(cmd.Error, "f.Buffer == nil")
log.Error(cmd.Error, "SHOULD DIE HERE")
cmd.Done = true
}
f.Dead = false
// loop that keeps trying to read from f
for f.Dead == false {
time.Sleep(time.Duration(msecDelay) * time.Millisecond) // only check the buffer 500 times a second
// set to false so it keeps retrying reads
f.Empty = false
// tight loop that reads 1024 bytes at a time until buffer is empty
// 1024 is set in f.BufferSize
for f.Empty == false {
f.Empty = cmd.ReadToBuffer(f)
}
}
}
// returns true if filehandle buffer is empty
func (cmd *OldShell) ReadToBuffer(f *File) bool {
log.Log(RUN, "ReadToBuffer() START")
nbr := f.Fnbreader
oneByte := make([]byte, 1024)
if nbr == nil {
// log.Debugln("ReadToBuffer() ERROR nbr is nil")
f.Dead = true
return true
}
count, err := nbr.Read(oneByte)
f.TotalCount += count
if err != nil {
// log.Debugln("ReadToBuffer() file has closed with", err)
// log.Debugln("ReadToBuffer() count = ", count, "err = ", err)
f.Dead = true
return true
}
if count == 0 {
// log.Debugln("ReadToBuffer() START count == 0 return true")
return true
}
// log.Debugln("ReadToBuffer() count = ", count)
// tmp := Chomp(oneByte)
// log.Debugln("ReadToBuffer() tmp = ", tmp)
io.WriteString(cmd.Buffer, strings.Trim(string(oneByte), "\x00"))
return false
}
// send the path and the command // send the path and the command
func RunCmd(workingpath string, parts []string) (error, bool, string) { func RunCmd(workingpath string, parts []string) (error, bool, string) {
if len(parts) == 0 { if len(parts) == 0 {

56
shell.go
View File

@ -1,14 +1,12 @@
package shell package shell
import ( import (
"bufio"
"io/ioutil" "io/ioutil"
"os" "os"
"os/exec" "os/exec"
"strings" "strings"
"time" "time"
"github.com/svent/go-nbreader"
"go.wit.com/log" "go.wit.com/log"
) )
@ -85,21 +83,6 @@ func RM(filename string) {
os.Remove(Path(filename)) os.Remove(Path(filename))
} }
/*
err := process.Wait()
if err != nil {
if (spewOn) {
// this panics: spew.Dump(err.(*exec.ExitError))
spew.Dump(process.ProcessState)
}
// stuff := err.(*exec.ExitError)
log.Log(INFO, "ERROR ", err.Error())
log.Log(INFO, "END ", cmdline)
handleError(err, -1)
return ""
*/
func Daemon(cmdline string, timeout time.Duration) int { func Daemon(cmdline string, timeout time.Duration) int {
for { for {
RunString(cmdline) RunString(cmdline)
@ -107,45 +90,6 @@ func Daemon(cmdline string, timeout time.Duration) int {
} }
} }
// pass in two file handles (1 read, 1 write)
func nonBlockingReader(buffReader *bufio.Reader, writeFileHandle *os.File, stdout *bufio.Writer) {
// newreader := bufio.NewReader(readFileHandle)
// create a nonblocking GO reader
nbr := nbreader.NewNBReader(buffReader, 1024)
for {
// defer buffReader.Close()
// defer writeFileHandle.Flush()
defer writeFileHandle.Close()
totalCount := 0
for {
oneByte := make([]byte, 1024)
count, err := nbr.Read(oneByte)
if err != nil {
log.Log(INFO, "count, err =", count, err)
handleError(err, -1)
return
}
totalCount += count
if count == 0 {
time.Sleep(time.Duration(msecDelay) * time.Millisecond) // without this delay this will peg the CPU
if totalCount != 0 {
log.Log(INFO, "STDERR: totalCount = ", totalCount)
totalCount = 0
}
} else {
log.Log(INFO, "STDERR: count = ", count)
writeFileHandle.Write(oneByte[0:count])
if quiet == false {
stdout.Write(oneByte[0:count])
stdout.Flush()
}
}
}
}
}
// run something and never return from it // run something and never return from it
// TODO: pass STDOUT, STDERR, STDIN correctly // TODO: pass STDOUT, STDERR, STDIN correctly
// TODO: figure out how to nohup the process and exit // TODO: figure out how to nohup the process and exit

157
ssh.go
View File

@ -1,157 +0,0 @@
package shell
import (
"fmt"
"io/ioutil"
"time"
"github.com/tmc/scp"
"go.wit.com/log"
"golang.org/x/crypto/ssh"
)
var sshHostname string
var sshPort int
var sshUsername string
var sshPassword string
var sshKeyfile string
func SSHclientSet(hostname string, port int, username string, pass string, keyfile string) {
sshHostname = hostname
sshPort = port
sshUsername = username
sshPassword = pass
sshKeyfile = keyfile
}
func SSHclientSCP(localfile string, remotefile string) {
log.Log(SSH, "shell.SSHclientSCP() START")
log.Log(SSH, "shell.SSHclientSCP() \tlocalfile =", localfile)
log.Log(SSH, "shell.SSHclientSCP() \tremotefile =", remotefile)
sess := mySsh(sshHostname, sshPort, sshUsername, sshPassword, sshKeyfile)
err := scp.CopyPath(localfile, remotefile, sess)
sess.Close()
log.Log(SSH, "shell.SSHclientSCP() \tscp.CopyPath() err =", err)
log.Log(SSH, "shell.SSHclientSCP() END")
}
func SSHclientRun(cmd string) {
log.Log(SSH, "shell.SSHclientRun() START cmd =", cmd)
sess := mySsh(sshHostname, sshPort, sshUsername, sshPassword, sshKeyfile)
err := sess.Run(cmd)
sess.Close()
log.Log(SSH, "shell.SSHclientRun() END err =", err)
}
func mySsh(hostname string, port int, username string, pass string, keyfile string) *ssh.Session {
// get host public key
// hostKey := getHostKey(host)
// log.Log(SSH, "hostkey =", hostKey)
publicKey, err := PublicKeyFile(keyfile)
if err != nil {
log.Log(SSH, "PublicKeyFile() error =", err)
}
// ssh client config
config := ssh.ClientConfig{
User: username,
Auth: []ssh.AuthMethod{
ssh.Password(pass),
publicKey,
},
// allow any host key to be used (non-prod)
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
// verify host public key
// HostKeyCallback: ssh.FixedHostKey(hostKey),
// optional host key algo list
HostKeyAlgorithms: []string{
ssh.KeyAlgoRSA,
ssh.KeyAlgoDSA,
ssh.KeyAlgoECDSA256,
ssh.KeyAlgoECDSA384,
ssh.KeyAlgoECDSA521,
ssh.KeyAlgoED25519,
},
// optional tcp connect timeout
Timeout: 5 * time.Second,
}
sport := fmt.Sprintf("%d", port)
// connect
client, err := ssh.Dial("tcp", hostname+":"+sport, &config)
if err != nil {
log.Error(err)
}
// defer client.Close()
// start session
sess, err := client.NewSession()
if err != nil {
log.Error(err)
}
// defer sess.Close()
return sess
}
func Scp(sess *ssh.Session, localfile string, remotefile string) {
err := scp.CopyPath(localfile, remotefile, sess)
log.Log(SSH, "scp.CopyPath() err =", err)
}
func PublicKeyFile(file string) (ssh.AuthMethod, error) {
buffer, err := ioutil.ReadFile(file)
log.Log(SSH, "buffer =", string(buffer))
if err != nil {
return nil, err
}
key, err := ssh.ParsePrivateKey(buffer)
if err != nil {
return nil, err
}
return ssh.PublicKeys(key), nil
}
// THIS doesn't work
/*
func getHostKey(host string) ssh.PublicKey {
// parse OpenSSH known_hosts file
// ssh or use ssh-keyscan to get initial key
file, err := os.Open(filepath.Join(os.Getenv("HOME"), ".ssh", "known_hosts"))
if err != nil {
log.Fatal(err)
}
defer file.Close()
scanner := bufio.NewScanner(file)
var hostKey ssh.PublicKey
for scanner.Scan() {
fields := strings.Split(scanner.Text(), " ")
if len(fields) != 3 {
continue
}
if strings.Contains(fields[0], host) {
var err error
hostKey, _, _, _, err = ssh.ParseAuthorizedKey(scanner.Bytes())
if err != nil {
log.Fatalf("error parsing %q: %v", fields[2], err)
}
break
}
}
// 9enFJdMhb8eHN/6qfHSU/jww2Mo=|pcsWQCvAyve9QXBhjL+w/LhkcHU= ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBMQx8BJXxD+vk3wyjy7Irzw4FA6xxJvqUP7Hb+Z+ygpOuidYj9G8x6gHEXFUnABn5YirePrWh5tNsk4Rqs48VwU=
hostKey, _, _, _, err = ssh.ParseAuthorizedKey([]byte("9enFJdMhb8eHN/6qfHSU/jww2Mo=|pcsWQCvAyve9QXBhjL+w/LhkcHU= ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBMQx8BJXxD+vk3wyjy7Irzw4FA6xxJvqUP7Hb+Z+ygpOuidYj9G8x6gHEXFUnABn5YirePrWh5tNsk4Rqs48VwU="))
log.Log(SSH, "hostkey err =", err)
log.Log(SSH, "hostkey =", hostKey)
if hostKey == nil {
log.Log(SSH, "no hostkey found err =", err)
log.Fatalf("no hostkey found for %s", host)
}
return hostKey
}
*/

4
structs.go
View File

@ -5,8 +5,6 @@ import (
"bytes" "bytes"
"io" "io"
"os/exec" "os/exec"
"github.com/svent/go-nbreader"
) )
var FileMap map[string]*File var FileMap map[string]*File
@ -24,7 +22,7 @@ type File struct {
Fio io.ReadCloser // := process.StdoutPipe() Fio io.ReadCloser // := process.StdoutPipe()
Fbufio *bufio.Reader // := bufio.NewReader(pOUT) Fbufio *bufio.Reader // := bufio.NewReader(pOUT)
Fnbreader *nbreader.NBReader // := nbreader.NewNBReader(readOUT, 1024) // Fnbreader *nbreader.NBReader // := nbreader.NewNBReader(readOUT, 1024)
} }
// early code playground // early code playground