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39 lines
728 B
Go
39 lines
728 B
Go
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// +build darwin
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package daemon
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import (
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"syscall"
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"unsafe"
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)
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import "C"
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// darwin's MAXPATHLEN
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const maxpathlen = 1024
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func lockFile(fd uintptr) error {
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err := syscall.Flock(int(fd), syscall.LOCK_EX|syscall.LOCK_NB)
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if err == syscall.EWOULDBLOCK {
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err = ErrWouldBlock
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}
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return err
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}
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func unlockFile(fd uintptr) error {
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err := syscall.Flock(int(fd), syscall.LOCK_UN)
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if err == syscall.EWOULDBLOCK {
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err = ErrWouldBlock
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}
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return err
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}
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func getFdName(fd uintptr) (name string, err error) {
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buf := make([]C.char, maxpathlen+1)
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_, _, errno := syscall.Syscall(syscall.SYS_FCNTL, fd, syscall.F_GETPATH, uintptr(unsafe.Pointer(&buf[0])))
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if errno == 0 {
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return C.GoString(&buf[0]), nil
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}
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return "", errno
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}
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