e291f464ee
- Implemented daemon.lock using flock (Unix) and LockFileEx (Windows) - Lock acquired before PID file, held for daemon lifetime - Eliminates race conditions in concurrent daemon starts - Backward compatible: falls back to PID check for old daemons - Updated isDaemonRunning() to check lock availability - All tests pass including new lock and backward compatibility tests Amp-Thread-ID: https://ampcode.com/threads/T-0e2627f4-03f9-4024-bb4b-21d23d296300 Co-authored-by: Amp <amp@ampcode.com>
19 lines
316 B
Go
19 lines
316 B
Go
//go:build unix
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package main
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import (
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"os"
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"golang.org/x/sys/unix"
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)
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// flockExclusive acquires an exclusive non-blocking lock on the file
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func flockExclusive(f *os.File) error {
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err := unix.Flock(int(f.Fd()), unix.LOCK_EX|unix.LOCK_NB)
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if err == unix.EWOULDBLOCK {
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return ErrDaemonLocked
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}
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return err
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}
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