50 lines
961 B
Go
50 lines
961 B
Go
package utils
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import "syscall"
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// Exit is the wait4 information from an exited process
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type Exit struct {
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Pid int
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Status int
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}
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// Reap reaps all child processes for the calling process and returns their
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// exit information
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func Reap(wait bool) (exits []Exit, err error) {
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var (
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ws syscall.WaitStatus
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rus syscall.Rusage
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)
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flag := syscall.WNOHANG
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if wait {
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flag = 0
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}
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for {
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pid, err := syscall.Wait4(-1, &ws, flag, &rus)
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if err != nil {
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if err == syscall.ECHILD {
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return exits, nil
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}
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return exits, err
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}
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if pid <= 0 {
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return exits, nil
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}
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exits = append(exits, Exit{
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Pid: pid,
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Status: ExitStatus(ws),
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})
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}
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}
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const exitSignalOffset = 128
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// ExitStatus returns the correct exit status for a process based on if it
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// was signaled or exited cleanly
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func ExitStatus(status syscall.WaitStatus) int {
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if status.Signaled() {
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return exitSignalOffset + int(status.Signal())
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}
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return status.ExitStatus()
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}
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