pidalive

Overview ¶

Package pidalive provides a single canonical answer to "is this PID alive?" for all of sprout. Replaces the per-package duplicate helpers that used os.FindProcess (which returns a non-nil handle even for dead PIDs on Windows, so a recycled PID would falsely appear alive).

Build tags in pidalive_windows.go and pidalive_unix.go route to the platform-specific implementation. The Unix version uses syscall.Kill(pid, 0) which is the correct cross-platform check on POSIX. The Windows version uses OpenProcess + GetExitCodeProcess via golang.org/x/sys/windows so it correctly distinguishes running PIDs from recycled/reused PIDs.

Tier 1 of SP-112 (platform parity).