masqmail

annotate src/dotlock.c @ 421:f37384470855

find changesets by author, revision, files, or words in the commit message
Changed lockdir to /var/lock/masqmail; Create lockdir and piddir on startup. Moved the lockdir out of the spool dir. (When /var/lock is a ramdisk we do well to have the lock files there.) Added the new configure option --with-lockdir to change that location. Nontheless, if we run_as_user, then lock files are always stored in the spool dir directly. Instead of installing the lockdir and piddir at installation time, we create them on startup time now if they are missing. This is necessary if lockdir or piddir are a tmpfs.
author markus schnalke <meillo@marmaro.de>
date Wed, 30 May 2012 09:38:38 +0200
parents 41958685480d
children
rev   line source
meillo@367 1 /*
meillo@367 2 ** MasqMail
meillo@367 3 ** Copyright (C) 2001 Oliver Kurth
meillo@367 4 **
meillo@367 5 ** This program is free software; you can redistribute it and/or modify
meillo@367 6 ** it under the terms of the GNU General Public License as published by
meillo@367 7 ** the Free Software Foundation; either version 2 of the License, or
meillo@367 8 ** (at your option) any later version.
meillo@367 9 **
meillo@367 10 ** This program is distributed in the hope that it will be useful,
meillo@367 11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@367 12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@367 13 ** GNU General Public License for more details.
meillo@367 14 **
meillo@367 15 ** You should have received a copy of the GNU General Public License
meillo@367 16 ** along with this program; if not, write to the Free Software
meillo@367 17 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0 18 */
meillo@0 19
meillo@0 20 #include <glib.h>
meillo@0 21 #include <unistd.h>
meillo@0 22 #include <fcntl.h>
meillo@0 23 #include <sys/stat.h>
meillo@0 24 #include <sys/types.h>
meillo@0 25 #include <syslog.h>
meillo@0 26 #include <errno.h>
meillo@0 27 #include <string.h>
meillo@0 28 #include <time.h>
meillo@0 29
meillo@0 30 #include "masqmail.h"
meillo@0 31 #include "dotlock.h"
meillo@0 32
meillo@10 33 gboolean
meillo@366 34 dot_lock(gchar *lock_name, gchar *hitch_name)
meillo@0 35 {
meillo@10 36 gboolean ok = FALSE;
meillo@10 37 int fd;
meillo@0 38
meillo@10 39 fd = open(hitch_name, O_WRONLY | O_CREAT | O_EXCL, 0);
meillo@10 40 if (fd != -1) {
meillo@10 41 struct stat stat_buf;
meillo@0 42
meillo@10 43 close(fd);
meillo@10 44 link(hitch_name, lock_name);
meillo@10 45 if (stat(hitch_name, &stat_buf) == 0) {
meillo@10 46 if (stat_buf.st_nlink == 2) {
meillo@10 47 unlink(hitch_name);
meillo@10 48 ok = TRUE;
meillo@10 49 } else {
meillo@10 50 if (stat(lock_name, &stat_buf) == 0) {
meillo@10 51 if ((time(NULL) - stat_buf.st_mtime) > MAX_LOCKAGE) {
meillo@10 52 /* remove lock if uncredibly old */
meillo@10 53 unlink(lock_name);
meillo@0 54
meillo@10 55 link(hitch_name, lock_name);
meillo@10 56 if (stat(hitch_name, &stat_buf) == 0) {
meillo@10 57 if (stat_buf.st_nlink == 2) {
meillo@10 58 unlink(hitch_name);
meillo@10 59 ok = TRUE;
meillo@10 60 }
meillo@10 61 }
meillo@10 62 }
meillo@10 63 }
meillo@10 64 }
meillo@10 65 }
meillo@10 66 if (!ok) {
meillo@10 67 unlink(hitch_name);
meillo@10 68 }
meillo@10 69 } else
meillo@10 70 logwrite(LOG_WARNING, "could not create lock file %s: %s\n", lock_name, strerror(errno));
meillo@0 71
meillo@10 72 return ok;
meillo@0 73 }
meillo@0 74
meillo@10 75 gboolean
meillo@366 76 dot_unlock(gchar *lock_name)
meillo@0 77 {
meillo@10 78 unlink(lock_name);
meillo@0 79
meillo@10 80 return TRUE;
meillo@0 81 }