proc

func Alive ¶

func Alive(pid int) bool

Alive reports whether pid names a live process.

unix:    FindProcess + Signal(0) — existence check, nothing delivered
windows: FindProcess opens a real handle and fails when pid is gone

func Detach ¶

func Detach(cmd *exec.Cmd)

Detach configures cmd (before Start) to outlive the parent terminal — the `evva service start` self-daemonize path.

unix:    SysProcAttr{Setsid: true}
windows: CreationFlags |= CREATE_NEW_PROCESS_GROUP | DETACHED_PROCESS

func Group ¶

func Group(cmd *exec.Cmd)

Group configures cmd (before Start) so the child and all its descendants can later be killed as one unit via KillTree.

unix:    SysProcAttr{Setpgid: true}
windows: CreationFlags |= CREATE_NEW_PROCESS_GROUP

func KillTree ¶

func KillTree(cmd *exec.Cmd) error

KillTree terminates cmd's whole process tree. Intended as (part of) a cmd.Cancel hook on a command prepared with Group. Best-effort by nature — the tree may already be gone; callers typically ignore the error and rely on cmd.WaitDelay to reap straggling pipe holders. A cmd that never started is a no-op.

unix:    syscall.Kill(-pid, SIGKILL)
windows: taskkill /T /F /PID <pid>

func Shell ¶

func Shell() (string, error)

Shell returns the POSIX shell used for `<shell> -c <command>` children: EVVA_SHELL if set, /bin/sh elsewhere, Git Bash on Windows. Resolved once per process. The error text is model/user-facing and says how to fix the environment.

func Terminate ¶

func Terminate(pid int) error

Terminate asks pid to stop.

unix:    SIGTERM (graceful)
windows: Process.Kill — there is no SIGTERM; hard-stop is acceptable
         for evva's own daemons, which are crash-safe by design
         (service resume restores sessions, mail, membership, alarms)