waveterm/pkg/wavebase/wavebase-posix.go
2024-10-04 12:20:52 -07:00

31 lines
600 B
Go

// Copyright 2024, Command Line Inc.
// SPDX-License-Identifier: Apache-2.0
//go:build !windows
package wavebase
import (
"log"
"os"
"path/filepath"
"golang.org/x/sys/unix"
)
func AcquireWaveLock() (FDLock, error) {
homeDir := GetWaveHomeDir()
lockFileName := filepath.Join(homeDir, WaveLockFile)
log.Printf("[base] acquiring lock on %s\n", lockFileName)
fd, err := os.OpenFile(lockFileName, os.O_RDWR|os.O_CREATE, 0600)
if err != nil {
return nil, err
}
err = unix.Flock(int(fd.Fd()), unix.LOCK_EX|unix.LOCK_NB)
if err != nil {
fd.Close()
return nil, err
}
return fd, nil
}