package os
Golang os.StarProcess(), os.Process.Kill(), Wait(), Signal() and Release() functions usage example
package main
import (
"fmt"
"os"
"syscall"
)
func main() {
r, w, err := os.Pipe()
if err != nil {
panic(err)
}
defer r.Close()
process, err := os.StartProcess("/bin/ps", []string{"-ef"}, &os.ProcAttr{Files: []*os.File{nil, w, os.Stderr}})
if err != nil {
panic(err)
}
processState, err := process.Wait()
if err != nil {
panic(err)
}
err = process.Release()
if err != nil {
panic(err)
}
fmt.Println("Did the child process exited? : ", processState.Exited())
fmt.Println("So the child pid is? : ", processState.Pid())
fmt.Println("Exited successfully? : ", processState.Success())
fmt.Println("Exited system CPU time ? : ", processState.SystemTime())
fmt.Println("Exited user CPU time ? : ", processState.UserTime())
// just to be sure, let's kill again
err = process.Signal(syscall.SIGKILL)
if err != nil {
fmt.Println(err) // see what the serial killer has to say
return
}
w.Close()
}
Sample output :
Did the child process exited? : true
So the child pid is? : 1376
Exited successfully? : true
Exited system CPU time ? : 3.722ms
Exited user CPU time ? : 984µs
os: process already released
References :
http://golang.org/pkg/os/#StartProcess
http://golang.org/pkg/os/#Process.Kill
http://golang.org/pkg/os/#Process.Release
http://golang.org/pkg/os/#Process.Signal
