2 Unix SMB/Netbios implementation.
5 Copyright (C) Andrew Tridgell 1998
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 extern int DEBUGLEVEL;
31 /* return the pid in a pidfile. return 0 if the process (or pidfile)
33 pid_t pidfile_pid(char *name)
40 slprintf(pidFile, sizeof(pidFile)-1, "%s/%s.pid", lp_lockdir(), name);
42 fd = open(pidFile, O_NONBLOCK | O_RDWR);
49 if (read(fd, pidstr, sizeof(pidstr)-1) <= 0) {
55 if (!process_exists(ret)) {
59 if (fcntl_lock(fd,SMB_F_SETLK,0,1,F_WRLCK)==False) {
60 /* we could get the lock - it can't be a Samba process */
73 /* create a pid file in the lock directory. open it and leave it locked */
74 void pidfile_create(char *name)
81 slprintf(pidFile, sizeof(pidFile)-1, "%s/%s.pid", lp_lockdir(), name);
83 pid = pidfile_pid(name);
85 DEBUG(0,("ERROR: %s is already running. File %s exists and process id %d is running.\n",
90 fd = sys_open(pidFile, O_NONBLOCK | O_CREAT | O_WRONLY | O_EXCL, 0644);
92 DEBUG(0,("ERROR: can't open %s: Error was %s\n", pidFile,
97 if (fcntl_lock(fd,SMB_F_SETLK,0,1,F_WRLCK)==False) {
98 DEBUG(0,("ERROR: %s : fcntl lock of file %s failed. Error was %s\n",
99 name, pidFile, strerror(errno)));
103 memset(buf, 0, sizeof(buf));
104 slprintf(buf, sizeof(buf) - 1, "%u\n", (unsigned int) getpid());
105 if (write(fd, buf, sizeof(buf)) != sizeof(buf)) {
106 DEBUG(0,("ERROR: can't write to file %s: %s\n",
107 pidFile, strerror(errno)));
110 /* Leave pid file open & locked for the duration... */