Package lockfile implements a simple automatic lockfile (PID) method for golang.

This version checks for a command line match to the pid if the pid is running. This is useful after a system reboot when another process may have taken the PID.

import "github.com/ehb54/lockfile"

    if lock, err := lockfile.Lock(filename); err != nil {
        panic(err)
    } else {
        defer lock.Unlock()
    }

func Lock(name string) (*LockFile, error)

Lock automatically checks if the file already exists, if so, reads the process ID from the file and checks if the process is running. If the process is running a nil lock is returned and an error stating "Locked by other process".

func (l *LockFile) Unlock()

Unlock closes and deletes the lock file previously created by Lock()

func ProcessRunning(pid int) bool

ProcessRunning is a cross-platform check to work on both Windows and Unix systems as the os.FindProcess() function works differently.