* 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) 2000-2004 Kern Sibbald and John Walker
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
#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");
+ Dmsg0(900, "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 */
/* 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 */
+ Dmsg0(900, "Exit daemon_start\n");
}