ba1b856acb
- Extract lock checking to internal/lockfile package - Add lock probe in RPC client before connection attempts - Update daemon discovery to use lock probe - Eliminates unnecessary connection attempts when socket missing Closes bd-wgu4 Amp-Thread-ID: https://ampcode.com/threads/T-3b863f21-3af4-49d3-9214-477d904b80fe Co-authored-by: Amp <amp@ampcode.com>
22 lines
411 B
Go
22 lines
411 B
Go
//go:build unix
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package lockfile
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import (
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"errors"
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"os"
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"golang.org/x/sys/unix"
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)
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var errDaemonLocked = errors.New("daemon lock already held by another process")
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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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