/*
- * daemon.c by Kern Sibbald
- *
- * Version $Id$
- *
- * this code is inspired by the Prentice Hall book
- * "Unix Network Programming" by W. Richard Stevens
- * and later updated from his book "Advanced Programming
- * in the UNIX Environment"
- *
- * Initialize a daemon process completely detaching us from
- * any terminal processes.
- *
- */
+ Bacula® - The Network Backup Solution
-/*
- Copyright (C) 2000, 2001, 2002 Kern Sibbald and John Walker
+ Copyright (C) 2000-2011 Free Software Foundation Europe e.V.
- 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.
+ The main author of Bacula is Kern Sibbald, with contributions from
+ many others, a complete list can be found in the file AUTHORS.
+ This program is Free Software; you can redistribute it and/or
+ modify it under the terms of version three of the GNU Affero General Public
+ License as published by the Free Software Foundation and included
+ in the file LICENSE.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
+ 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., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA.
+ You should have received a copy of the GNU Affero General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
+ Bacula® is a registered trademark of Kern Sibbald.
+ The licensor of Bacula is the Free Software Foundation Europe
+ (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
+ Switzerland, email:ftf@fsfeurope.org.
+*/
+/*
+ * daemon.c by Kern Sibbald 2000
+ *
+ * This code is inspired by the Prentice Hall book
+ * "Unix Network Programming" by W. Richard Stevens
+ * and later updated from his book "Advanced Programming
+ * in the UNIX Environment"
+ *
+ * Initialize a daemon process completely detaching us from
+ * any terminal processes.
+ *
*/
#include "bacula.h"
+extern int debug_level;
-void
+void
daemon_start()
{
-#ifndef HAVE_CYGWIN
+#if !defined(HAVE_WIN32)
int i;
- int cpid;
+ pid_t cpid;
+ mode_t oldmask;
+#ifdef DEVELOPER
+ int low_fd = 2;
+#else
+ int low_fd = -1;
+#endif
/*
* Become a daemon.
*/
- Dmsg0(200, "Enter daemon_start\n");
- if ( (cpid = fork() ) < 0)
- Emsg1(M_ABORT, 0, "Cannot fork to become daemon: %s\n", strerror(errno));
- else if (cpid > 0)
- exit(0); /* parent exits */
+ Dmsg0(900, "Enter daemon_start\n");
+ if ( (cpid = fork() ) < 0) {
+ berrno be;
+ Emsg1(M_ABORT, 0, _("Cannot fork to become daemon: ERR=%s\n"), be.bstrerror());
+ } else if (cpid > 0) {
+ exit(0); /* parent exits */
+ }
/* Child continues */
-
+
setsid();
/* In the PRODUCTION system, we close ALL
- * file descriptors. It is useful
- * for debugging to leave the standard ones open.
+ * file descriptors except stdin, stdout, and stderr.
*/
- for (i=sysconf(_SC_OPEN_MAX)-1; i >=0; i--) {
-#ifdef DEBUG
- if (i != STDIN_FILENO && i != STDOUT_FILENO && i != STDERR_FILENO) {
- close(i);
- }
-#else
+ if (debug_level > 0) {
+ low_fd = 2; /* don't close debug output */
+ }
+ for (i=sysconf(_SC_OPEN_MAX)-1; i > low_fd; i--) {
close(i);
-#endif
}
/* Move to root directory. For debug we stay
chdir("/");
#endif
- /* clear any inherited umask */
- umask(0);
+ /*
+ * Avoid creating files 666 but don't override any
+ * more restrictive mask set by the user.
+ */
+ oldmask = umask(026);
+ oldmask |= 026;
+ umask(oldmask);
+
+
+ /*
+ * Make sure we have fd's 0, 1, 2 open
+ * If we don't do this one of our sockets may open
+ * there and if we then use stdout, it could
+ * send total garbage to our socket.
+ *
+ */
+ int fd;
+ fd = open("/dev/null", O_RDONLY, 0644);
+ if (fd > 2) {
+ close(fd);
+ } else {
+ for(i=1; fd + i <= 2; i++) {
+ dup2(fd, fd+i);
+ }
+ }
- Dmsg0(200, "Exit daemon_start\n");
-#endif /* HAVE_CYGWIN */
+#endif /* HAVE_WIN32 */
+ Dmsg0(900, "Exit daemon_start\n");
}