forked from mattn/goreman
/
proc_posix.go
60 lines (50 loc) · 1.17 KB
/
proc_posix.go
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// +build !windows
package main
import (
"fmt"
"os"
"os/exec"
"syscall"
)
// spawn command that specified as proc.
func spawnProc(proc string) bool {
logger := createLogger(proc)
cs := []string{"/bin/bash", "-c", procs[proc].cmdline}
cmd := exec.Command(cs[0], cs[1:]...)
cmd.Stdin = nil
cmd.Stdout = logger
cmd.Stderr = logger
cmd.Env = append(os.Environ(), fmt.Sprintf("PORT=%d", procs[proc].port))
fmt.Fprintf(logger, "Starting %s on port %d\n", proc, procs[proc].port)
err := cmd.Start()
if err != nil {
fmt.Fprintf(logger, "Failed to start %s: %s\n", proc, err)
return true
}
procs[proc].cmd = cmd
procs[proc].quit = true
procs[proc].cmd.Wait()
procs[proc].cmd = nil
fmt.Fprintf(logger, "Terminating %s\n", proc)
return procs[proc].quit
}
func terminateProc(proc string) error {
p := procs[proc].cmd.Process
if p == nil {
return nil
}
pgid, err := syscall.Getpgid(p.Pid)
if err != nil {
return err
}
// use pgid, ref: http://unix.stackexchange.com/questions/14815/process-descendants
pid := p.Pid
if pgid == p.Pid {
pid = -1 * pid
}
target, err := os.FindProcess(pid)
if err != nil {
err = target.Signal(syscall.SIGHUP)
}
return err
}