47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
//go:build linux || freebsd || darwin
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// +build linux freebsd darwin
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package system // import "github.com/docker/docker/pkg/system"
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import (
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"fmt"
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"os"
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"strings"
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"syscall"
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"golang.org/x/sys/unix"
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)
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// IsProcessAlive returns true if process with a given pid is running.
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func IsProcessAlive(pid int) bool {
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err := unix.Kill(pid, syscall.Signal(0))
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if err == nil || err == unix.EPERM {
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return true
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}
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return false
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}
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// KillProcess force-stops a process.
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func KillProcess(pid int) {
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unix.Kill(pid, unix.SIGKILL)
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}
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// IsProcessZombie return true if process has a state with "Z"
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// http://man7.org/linux/man-pages/man5/proc.5.html
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func IsProcessZombie(pid int) (bool, error) {
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statPath := fmt.Sprintf("/proc/%d/stat", pid)
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dataBytes, err := os.ReadFile(statPath)
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if err != nil {
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// TODO(thaJeztah) should we ignore os.IsNotExist() here? ("/proc/<pid>/stat" will be gone if the process exited)
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return false, err
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}
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data := string(dataBytes)
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sdata := strings.SplitN(data, " ", 4)
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if len(sdata) >= 3 && sdata[2] == "Z" {
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return true, nil
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}
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return false, nil
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}
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