26 lines
642 B
Go
26 lines
642 B
Go
//go:build unix
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package main
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import (
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"errors"
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"os"
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"syscall"
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)
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const processAliveSupported = true
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// isProcessAlive checks if a process with the given PID is still running.
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// On Unix, FindProcess always succeeds, so we send signal 0 to probe the
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// process. If the signal returns nil or EPERM, the process exists (EPERM
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// means it exists but we lack permission to signal it). ESRCH or any
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// other error indicates the process is gone.
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func isProcessAlive(pid int) bool {
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proc, err := os.FindProcess(pid)
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if err != nil {
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return false
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}
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err = proc.Signal(syscall.Signal(0))
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return err == nil || errors.Is(err, syscall.EPERM)
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}
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