github.com/imannamdari/v2ray-core/v5@v5.0.5/transport/internet/filelocker_other.go (about)

     1  //go:build !windows
     2  // +build !windows
     3  
     4  package internet
     5  
     6  import (
     7  	"os"
     8  
     9  	"golang.org/x/sys/unix"
    10  )
    11  
    12  // Acquire lock
    13  func (fl *FileLocker) Acquire() error {
    14  	f, err := os.Create(fl.path)
    15  	if err != nil {
    16  		return err
    17  	}
    18  	if err := unix.Flock(int(f.Fd()), unix.LOCK_EX); err != nil {
    19  		f.Close()
    20  		return newError("failed to lock file: ", fl.path).Base(err)
    21  	}
    22  	fl.file = f
    23  	return nil
    24  }
    25  
    26  // Release lock
    27  func (fl *FileLocker) Release() {
    28  	if err := unix.Flock(int(fl.file.Fd()), unix.LOCK_UN); err != nil {
    29  		newError("failed to unlock file: ", fl.path).Base(err).WriteToLog()
    30  	}
    31  	if err := fl.file.Close(); err != nil {
    32  		newError("failed to close file: ", fl.path).Base(err).WriteToLog()
    33  	}
    34  	if err := os.Remove(fl.path); err != nil {
    35  		newError("failed to remove file: ", fl.path).Base(err).WriteToLog()
    36  	}
    37  }