21 lines
469 B
Go
21 lines
469 B
Go
//go:build linux || darwin || freebsd || openbsd || netbsd || dragonfly
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package common
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import (
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"os"
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"syscall"
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)
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func lockPersistentFile() (func(), error) {
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file, err := os.OpenFile("persistent.lock", os.O_CREATE|os.O_RDWR, 0600)
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if err != nil {
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return nil, err
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}
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if err := syscall.Flock(int(file.Fd()), syscall.LOCK_EX); err != nil {
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file.Close()
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return nil, err
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}
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return func() { syscall.Flock(int(file.Fd()), syscall.LOCK_UN); file.Close() }, nil
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}
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