* in the UNIX Environment"
*
* Initialize a daemon process completely detaching us from
- * any terminal processes.
+ * any terminal processes.
*
- */
-
+ */
/*
- Copyright (C) 2000, 2001, 2002 Kern Sibbald and John Walker
+ Copyright (C) 2000-2005 Kern Sibbald
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.
+ modify it under the terms of the GNU General Public License
+ version 2 as amended with additional clauses defined in the
+ file LICENSE in the main source directory.
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.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ the file LICENSE for additional details.
*/
#include "bacula.h"
+extern int debug_level;
-void
+void
daemon_start()
{
-#ifndef HAVE_CYGWIN
+#if !defined(HAVE_CYGWIN) && !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: %s\n"), be.strerror());
+ } else if (cpid > 0) {
+ exit(0); /* parent exits */
+ }
/* Child continues */
-
+
setsid();
/* In the PRODUCTION system, we close ALL
* file descriptors except stdin, stdout, and stderr.
*/
- for (i=sysconf(_SC_OPEN_MAX)-1; i >= 3; i--) {
+ 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);
}
chdir("/");
#endif
- /*
+ /*
* Avoid creating files 666 but don't override any
* more restrictive mask set by the user.
*/
oldmask |= 026;
umask(oldmask);
- Dmsg0(200, "Exit daemon_start\n");
+
+ /*
+ * 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);
+ }
+ }
+
#endif /* HAVE_CYGWIN */
+ Dmsg0(900, "Exit daemon_start\n");
}