/
runner.go
112 lines (99 loc) · 2.01 KB
/
runner.go
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// Copyright (c) 2019, 2021, AT&T Intellectual Property. All rights reserved.
//
// Copyright (c) 2013-2017 by Brocade Communications Systems, Inc.
// All rights reserved.
//
// SPDX-License-Identifier: LGPL-2.1-only
package main
import (
"fmt"
"io"
"os"
"os/exec"
"strings"
"syscall"
)
type Cmd struct {
Path string
Args []string
Env []string
Dir string
Uid uint32
Setuid bool
Istty bool
Termpath string
Term *os.File
Stdin io.ReadCloser
Stdout io.WriteCloser
Stderr io.WriteCloser
}
func getExecCommand(cmd *Cmd) (*exec.Cmd, error) {
/*prepare command for exec*/
c := exec.Command(cmd.Path, cmd.Args...)
if cmd.Env != nil {
var dir string
for _, v := range cmd.Env {
ev := strings.Split(v, "=")
if len(ev) < 2 {
continue
}
switch ev[0] {
case "PWD":
dir = ev[1]
}
}
c.Env = cmd.Env
c.Env = append(c.Env, fmt.Sprintf("OPD_PTY=%t", cmd.Istty))
if !cmd.Istty {
c.Env = append(c.Env, "TERM=dumb")
}
c.Dir = dir
}
c.Stdout = cmd.Stdout
c.Stdin = cmd.Stdin
c.Stderr = cmd.Stderr
c.SysProcAttr = &syscall.SysProcAttr{
Setctty: cmd.Istty,
// Set session ID to true for all processes, to
// ensure it dies when the parent process dies
Setsid: true,
}
return c, nil
}
func Run(cmd *Cmd) (int, error) {
var err error
var term *os.File
var rc int = 1
if cmd.Term != nil {
term = cmd.Term
} else if cmd.Termpath != "" {
term, err = os.OpenFile(cmd.Termpath, os.O_RDWR|syscall.O_NOCTTY, 0)
if err != nil {
return rc, err
}
defer term.Close()
} else {
return rc, fmt.Errorf("No terminal specified by descriptor or path")
}
cmd.Stdin = term
cmd.Stdout = term
cmd.Stderr = term
c, err := getExecCommand(cmd)
if err != nil {
return rc, err
}
err = c.Start()
if err != nil {
return rc, err
}
if err = c.Wait(); err != nil {
if exiterr, ok := err.(*exec.ExitError); ok {
if status, ok := exiterr.Sys().(syscall.WaitStatus); ok {
rc = status.ExitStatus()
}
}
} else {
rc = 0
}
return rc, nil
}