golang执行cmd命令行启动一个程序，然后怎么获取到这个进程的ID呢
linux 下可以
```
package main
import (
"fmt"
"os"
"syscall"
)
const (
UID = 501
GUID = 100
)
func main() {
// The Credential fields are used to set UID, GID and attitional GIDS of the process
// You need to run the program as root to do this
var cred = &syscall.Credential{ UID, GUID, []uint32{} ,true}
// the Noctty flag is used to detach the process from parent tty
var sysproc = &syscall.SysProcAttr{ Credential:cred, Noctty:true }
var attr = os.ProcAttr{
Dir: ".",
Env: os.Environ(),
Files: []*os.File{
os.Stdin,
nil,
nil,
},
Sys:sysproc,
}
process, err := os.StartProcess("/bin/sleep", []string{"/bin/sleep", "100"}, &attr)
if err == nil {
fmt.Println(process.Pid)
// It is not clear from docs, but Realease actually detaches the process
err = process.Release();
if err != nil {
fmt.Println(err.Error())
}
} else {
fmt.Println(err.Error())
}
}
```
来自 stackoverflow https://stackoverflow.com/questions/23031752/start-a-process-in-go-and-detach-from-it