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Package procutil provides cross-platform process liveness checks.

#internal/procutil

#internal/procutil

Package procutil provides cross-platform process liveness checks.

#ErrNoStartTime

Go go
var ErrNoStartTime = errors.New("process start time unavailable")

ErrNoStartTime is returned by StartTime when the process start time cannot be determined: the platform does not expose it, the PID is gone, or the kernel-provided data is unparseable. Callers must fail closed on this error (assume the recorded identity still holds) rather than guessing.

#Start

Go go
type Start struct

Start identifies one specific run of a process on the local machine.

A PID alone is not an identity: PIDs are reused. Ticks pins the PID to the exact process instance that occupied it, so a recorded (pid, ticks) pair can be re-read later and compared to decide whether the original process is still the one holding that PID.

#ProcessAlive

Go go
func ProcessAlive(pid int) bool

ProcessAlive checks if a process with the given PID exists. Returns true if the process is alive (including cases where we lack permission to signal it).

#StartTime

Go go
func StartTime(pid int) (Start, error)

StartTime reads the start time of the process with the given PID from /proc//stat. It returns ErrNoStartTime when /proc is unavailable, the process is gone, or the kernel data cannot be parsed.

#StartTime

Go go
func StartTime(pid int) (Start, error)

StartTime is unavailable off Linux: there is no /proc//stat to read a process start time from. Callers fail closed on ErrNoStartTime, so PID-reuse detection is simply absent on these platforms rather than guessed at.

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