Moves files

internal/lock_unix.go

@@ -0,0 +1,50 @@
+// +build !windows
+
+package restic
+
+import (
+	"os"
+	"os/user"
+	"strconv"
+	"syscall"
+
+	"restic/errors"
+
+	"restic/debug"
+)
+
+// uidGidInt returns uid, gid of the user as a number.
+func uidGidInt(u user.User) (uid, gid uint32, err error) {
+	var ui, gi int64
+	ui, err = strconv.ParseInt(u.Uid, 10, 32)
+	if err != nil {
+		return uid, gid, errors.Wrap(err, "ParseInt")
+	}
+	gi, err = strconv.ParseInt(u.Gid, 10, 32)
+	if err != nil {
+		return uid, gid, errors.Wrap(err, "ParseInt")
+	}
+	uid = uint32(ui)
+	gid = uint32(gi)
+	return
+}
+
+// checkProcess will check if the process retaining the lock
+// exists and responds to SIGHUP signal.
+// Returns true if the process exists and responds.
+func (l Lock) processExists() bool {
+	proc, err := os.FindProcess(l.PID)
+	if err != nil {
+		debug.Log("error searching for process %d: %v\n", l.PID, err)
+		return false
+	}
+	defer proc.Release()
+
+	debug.Log("sending SIGHUP to process %d\n", l.PID)
+	err = proc.Signal(syscall.SIGHUP)
+	if err != nil {
+		debug.Log("signal error: %v, lock is probably stale\n", err)
+		return false
+	}
+	return true
+}