2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
3 Copyright (C) 2016-2023 Sergey Matveev <stargrave@stargrave.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, version 3 of the License.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 "golang.org/x/sys/unix"
27 func (ctx *Ctx) LockDir(nodeId *NodeId, lockCtx string) (*os.File, error) {
28 if err := ctx.ensureRxDir(nodeId); err != nil {
31 lockPath := filepath.Join(ctx.Spool, nodeId.String(), lockCtx) + ".lock"
32 dirLock, err := os.OpenFile(
34 os.O_CREATE|os.O_WRONLY,
38 ctx.LogE("lockdir-open", LEs{{"Path", lockPath}}, err, func(les LEs) string {
39 return "Locking directory: opening " + lockPath
43 err = unix.Flock(int(dirLock.Fd()), unix.LOCK_EX|unix.LOCK_NB)
45 ctx.LogE("lockdir-flock", LEs{{"Path", lockPath}}, err, func(les LEs) string {
46 return "Locking directory: locking " + lockPath
54 func (ctx *Ctx) UnlockDir(fd *os.File) {
56 unix.Flock(int(fd.Fd()), unix.LOCK_UN)