internal package

[mmc.git] / lock.go

diff --git a/lock.go b/lock.go
deleted file mode 100644 (file)
index 271b39c..0000000
--- a/lock.go
+++ /dev/null
@@ -1,49 +0,0 @@
-// mmc -- Mattermost client
-// Copyright (C) 2023 Sergey Matveev <stargrave@stargrave.org>
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as
-// published by the Free Software Foundation, either version 3 of the
-// License.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
-//
-// You should have received a copy of the GNU Affero General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-package mmc
-
-import (
-       "io"
-       "os"
-
-       "golang.org/x/sys/unix"
-)
-
-func Lock(what string) (func(), error) {
-       fd, err := os.OpenFile(
-               what,
-               os.O_WRONLY|os.O_TRUNC|os.O_CREATE,
-               os.FileMode(0666),
-       )
-       dummy := func() {}
-       if err != nil {
-               return dummy, err
-       }
-       flock := unix.Flock_t{
-               Type:   unix.F_WRLCK,
-               Whence: io.SeekStart,
-       }
-       if err = unix.FcntlFlock(fd.Fd(), unix.F_SETLKW, &flock); err != nil {
-               fd.Close()
-               return dummy, err
-       }
-       return func() {
-               flock.Type = unix.F_UNLCK
-               unix.FcntlFlock(fd.Fd(), unix.F_SETLK, &flock)
-               fd.Close()
-       }, nil
-}