summaryrefslogtreecommitdiff
path: root/source3/lib
diff options
context:
space:
mode:
Diffstat (limited to 'source3/lib')
-rw-r--r--source3/lib/pidfile.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/source3/lib/pidfile.c b/source3/lib/pidfile.c
new file mode 100644
index 0000000000..8dee7421de
--- /dev/null
+++ b/source3/lib/pidfile.c
@@ -0,0 +1,88 @@
+/*
+ Unix SMB/Netbios implementation.
+ Version 1.9.
+ pidfile handling
+ Copyright (C) Andrew Tridgell 1998
+
+ This program 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 of the License, or
+ (at your option) any later version.
+
+ 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+
+extern int DEBUGLEVEL;
+
+#ifndef O_NONBLOCK
+#define O_NONBLOCK
+#endif
+
+
+/* create a pid file in the lock directory. open it and leave it locked */
+void pidfile_create(char *name)
+{
+ int fd;
+ char buf[20];
+ pstring pidFile;
+
+ sprintf(pidFile, "%s/%s.pid", lp_lockdir(), name);
+
+ fd = open(pidFile, O_NONBLOCK | O_CREAT | O_WRONLY | O_TRUNC, 0644);
+ if (fd < 0) {
+ DEBUG(0,("ERROR: can't open %s: %s\n", pidFile,
+ strerror(errno)));
+ exit(1);
+ }
+
+ if (fcntl_lock(fd,F_SETLK,0,1,F_WRLCK)==False) {
+ DEBUG(0,("ERROR: %s is already running\n", name));
+ exit(1);
+ }
+
+ sprintf(buf, "%u\n", (unsigned int) getpid());
+ if (write(fd, buf, strlen(buf)) < 0) {
+ DEBUG(0,("ERROR: can't write to %s: %s\n",
+ pidFile, strerror(errno)));
+ exit(1);
+ }
+ /* Leave pid file open & locked for the duration... */
+}
+
+
+/* return the pid in a pidfile. return 0 if the process (or pidfile)
+ does not exist */
+int pidfile_pid(char *name)
+{
+ FILE *f;
+ pstring pidFile;
+ unsigned ret;
+
+ sprintf(pidFile, "%s/%s.pid", lp_lockdir(), name);
+
+ f = fopen(pidFile, "r");
+ if (!f) {
+ return 0;
+ }
+
+ if (fscanf(f,"%u", &ret) != 1) {
+ fclose(f);
+ return 0;
+ }
+ fclose(f);
+
+ if (!process_exists(ret)) return 0;
+
+ return ret;
+}
+