--- a/mash/lock.c Sun Jul 15 14:08:19 2018 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,134 +0,0 @@
-/*****************************************************************************
- * Copyright (C) 2014
- *
- * Michiel Broek <mbroek at mbse dot eu>
- *
- * This file is part of the mbsePi-apps
- *
- * This is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * mbsePi-apps 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
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with EC-65K; see the file COPYING. If not, write to the Free
- * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- *****************************************************************************/
-
-#include "mash.h"
-#include "lock.h"
-
-
-/*
- * Put a lock on this program.
- */
-int lockprog(char *name)
-{
- char *tempfile, *lockfile;
- FILE *fp;
- pid_t oldpid;
-
- tempfile = calloc(PATH_MAX, sizeof(char));
- lockfile = calloc(PATH_MAX, sizeof(char));
-
- snprintf(tempfile, PATH_MAX, "/var/run/%s.tmp", name);
- snprintf(lockfile, PATH_MAX, "/var/run/%s.pid", name);
-
- if ((fp = fopen(tempfile, "w")) == NULL) {
- perror(name);
- printf("Can't create lockfile \"%s\"\n", tempfile);
- free(tempfile);
- free(lockfile);
- return 1;
- }
- fprintf(fp, "%10u\n", getpid());
- fclose(fp);
-
- while (TRUE) {
- if (link(tempfile, lockfile) == 0) {
- unlink(tempfile);
- free(tempfile);
- free(lockfile);
- return 0;
- }
- if ((fp = fopen(lockfile, "r")) == NULL) {
- perror(name);
- printf("Can't open lockfile \"%s\"\n", tempfile);
- unlink(tempfile);
- free(tempfile);
- free(lockfile);
- return 1;
- }
- if (fscanf(fp, "%u", &oldpid) != 1) {
- perror(name);
- printf("Can't read old pid from \"%s\"\n", tempfile);
- fclose(fp);
- unlink(tempfile);
- free(tempfile);
- free(lockfile);
- return 1;
- }
- fclose(fp);
- if (kill(oldpid,0) == -1) {
- if (errno == ESRCH) {
- printf("Stale lock found for pid %u\n", oldpid);
- unlink(lockfile);
- /* no return, try lock again */
- } else {
- perror(name);
- printf("Kill for %u failed\n",oldpid);
- unlink(tempfile);
- free(tempfile);
- free(lockfile);
- return 1;
- }
- } else {
- printf("Another %s is already running, pid=%u\n", name, oldpid);
- unlink(tempfile);
- free(tempfile);
- free(lockfile);
- return 1;
- }
- }
-}
-
-
-
-void ulockprog(char *name)
-{
- char *lockfile;
- pid_t oldpid;
- FILE *fp;
-
- lockfile = calloc(PATH_MAX, sizeof(char));
- snprintf(lockfile, PATH_MAX, "/var/run/%s.pid", name);
-
- if ((fp = fopen(lockfile, "r")) == NULL) {
- syslog(LOG_NOTICE, "Can't open lockfile \"%s\"", lockfile);
- free(lockfile);
- return;
- }
-
- if (fscanf(fp, "%u", &oldpid) != 1) {
- syslog(LOG_NOTICE, "Can't read old pid from \"%s\"", lockfile);
- fclose(fp);
- unlink(lockfile);
- free(lockfile);
- return;
- }
-
- fclose(fp);
-
- if (oldpid == getpid()) {
- (void)unlink(lockfile);
- }
-
- free(lockfile);
-}
-
-