39 lines
754 B
Go
39 lines
754 B
Go
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package utils
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import (
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"fmt"
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"os"
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"syscall"
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)
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func FindProcess(pid int) (*os.Process, error) {
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if pid <= 0 {
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return nil, fmt.Errorf("invalid pid %v", pid)
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}
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// The error doesn't mean anything on Unix systems, let's just check manually
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// that the new gunicorn master has properly started
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// https://github.com/golang/go/issues/34396
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proc, err := os.FindProcess(int(pid))
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if err != nil {
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return nil, err
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}
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err = proc.Signal(syscall.Signal(0))
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if err == nil {
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return proc, nil
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}
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if err.Error() == "os: process already finished" {
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return nil, nil
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}
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errno, ok := err.(syscall.Errno)
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if !ok {
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return nil, err
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}
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switch errno {
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case syscall.ESRCH:
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return nil, nil
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case syscall.EPERM:
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return proc, nil
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}
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return nil, err
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}
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