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//go:build linux
package namespace
import (
"fmt"
"os"
"path/filepath"
"git.theodohertyfamily.com/tools/wg-wrap/internal/paths"
"golang.org/x/sys/unix"
)
// AcquireProfileLock locks the profile to prevent concurrent startup races.
func AcquireProfileLock(pm *paths.PathManager, profile string) (*os.File, error) {
lockPath := filepath.Join(pm.RuntimeBaseDir(), "profiles", profile+".lock")
if err := os.MkdirAll(filepath.Dir(lockPath), 0755); err != nil {
return nil, fmt.Errorf("failed to create lock directory: %w", err)
}
file, err := os.OpenFile(lockPath, os.O_CREATE|os.O_RDWR, 0600)
if err != nil {
return nil, fmt.Errorf("failed to open lock file: %w", err)
}
if err := unix.Flock(int(file.Fd()), unix.LOCK_EX); err != nil {
_ = file.Close()
return nil, fmt.Errorf("failed to lock profile: %w", err)
}
return file, nil
}
// ReleaseProfileLock unlocks the profile.
func ReleaseProfileLock(file *os.File) {
if file != nil {
_ = unix.Flock(int(file.Fd()), unix.LOCK_UN)
_ = file.Close()
}
}
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