command

func Exists ¶

func Exists(cmd string) bool

func ExistsForUser ¶

func ExistsForUser(cmd, user string) bool

func ForUser ¶

func ForUser(cmd *exec.Cmd, userName string) error

func GetHome ¶

func GetHome(userName string) (string, error)

func IsRunning ¶

func IsRunning(pid string) (bool, error)

func Kill ¶

func Kill(pid string) error

func Quote ¶

func Quote(args []string) string

func StartBackgroundOnce ¶

func StartBackgroundOnce(commandName string, createCommand CreateCommand) error

StartBackgroundOnce starts a background process, ensuring only one instance with the given commandName runs at a time. If a process is already running (determined by PID file), or the lock cannot be acquired, it returns nil.

Process output is redirected to TMPDIR/commandName.streams unless the command already has Stdout/Stderr configured. The PID is recorded in TMPDIR/commandName.pid. These files are not cleaned up on exit.

func WrapCommandError ¶

func WrapCommandError(stdout []byte, err error) error