micro/runtime/local/process/os/os.go
2020-01-19 17:47:27 +00:00

101 lines
1.6 KiB
Go

// +build !windows
// Package os runs processes locally
package os
import (
"fmt"
"os"
"os/exec"
"strconv"
"syscall"
"github.com/micro/go-micro/runtime/local/process"
)
func (p *Process) Exec(exe *process.Executable) error {
cmd := exec.Command(exe.Package.Path)
return cmd.Run()
}
func (p *Process) Fork(exe *process.Executable) (*process.PID, error) {
// create command
cmd := exec.Command(exe.Package.Path, exe.Args...)
// set env vars
cmd.Env = append(cmd.Env, exe.Env...)
// create process group
cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
in, err := cmd.StdinPipe()
if err != nil {
return nil, err
}
out, err := cmd.StdoutPipe()
if err != nil {
return nil, err
}
er, err := cmd.StderrPipe()
if err != nil {
return nil, err
}
// start the process
if err := cmd.Start(); err != nil {
return nil, err
}
return &process.PID{
ID: fmt.Sprintf("%d", cmd.Process.Pid),
Input: in,
Output: out,
Error: er,
}, nil
}
func (p *Process) Kill(pid *process.PID) error {
id, err := strconv.Atoi(pid.ID)
if err != nil {
return err
}
pr, err := os.FindProcess(id)
if err != nil {
return err
}
// now kill it
err = pr.Kill()
// kill the group
if pgid, err := syscall.Getpgid(id); err == nil {
syscall.Kill(-pgid, syscall.SIGKILL)
}
// return the kill error
return err
}
func (p *Process) Wait(pid *process.PID) error {
id, err := strconv.Atoi(pid.ID)
if err != nil {
return err
}
pr, err := os.FindProcess(id)
if err != nil {
return err
}
ps, err := pr.Wait()
if err != nil {
return err
}
if ps.Success() {
return nil
}
return fmt.Errorf(ps.String())
}