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annotate src/dotlock.c @ 421:f37384470855

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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 b27f66555ba8
children
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1 /*
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2 ** MasqMail
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3 ** Copyright (C) 2001 Oliver Kurth
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4 **
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5 ** This program is free software; you can redistribute it and/or modify
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6 ** it under the terms of the GNU General Public License as published by
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7 ** the Free Software Foundation; either version 2 of the License, or
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8 ** (at your option) any later version.
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9 **
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10 ** This program is distributed in the hope that it will be useful,
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11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 ** GNU General Public License for more details.
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14 **
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15 ** You should have received a copy of the GNU General Public License
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16 ** along with this program; if not, write to the Free Software
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17 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
0
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18 */
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19
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20 #include <glib.h>
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21 #include <unistd.h>
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22 #include <fcntl.h>
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23 #include <sys/stat.h>
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24 #include <sys/types.h>
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25 #include <syslog.h>
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26 #include <errno.h>
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27 #include <string.h>
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28 #include <time.h>
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29
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30 #include "masqmail.h"
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31 #include "dotlock.h"
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32
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33 gboolean
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34 dot_lock(gchar *lock_name, gchar *hitch_name)
0
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35 {
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36 gboolean ok = FALSE;
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37 int fd;
0
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39 fd = open(hitch_name, O_WRONLY | O_CREAT | O_EXCL, 0);
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40 if (fd != -1) {
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41 struct stat stat_buf;
0
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42
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43 close(fd);
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44 link(hitch_name, lock_name);
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45 if (stat(hitch_name, &stat_buf) == 0) {
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46 if (stat_buf.st_nlink == 2) {
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47 unlink(hitch_name);
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48 ok = TRUE;
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49 } else {
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50 if (stat(lock_name, &stat_buf) == 0) {
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51 if ((time(NULL) - stat_buf.st_mtime) > MAX_LOCKAGE) {
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52 /* remove lock if uncredibly old */
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53 unlink(lock_name);
0
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54
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55 link(hitch_name, lock_name);
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56 if (stat(hitch_name, &stat_buf) == 0) {
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57 if (stat_buf.st_nlink == 2) {
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58 unlink(hitch_name);
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59 ok = TRUE;
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60 }
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61 }
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62 }
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63 }
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64 }
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65 }
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66 if (!ok) {
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67 unlink(hitch_name);
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68 }
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69 } else
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70 logwrite(LOG_WARNING, "could not create lock file %s: %s\n", lock_name, strerror(errno));
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72 return ok;
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73 }
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75 gboolean
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76 dot_unlock(gchar *lock_name)
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77 {
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78 unlink(lock_name);
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80 return TRUE;
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81 }