X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/460b9539a7c15580e41a71bbc0f47ae776238915..5dba54ab01bce6ca8a6f1fd64b46cd304501b596:/server/daemonize.c

diff --git a/server/daemonize.c b/server/daemonize.c
index bddc167..7333819 100644
--- a/server/daemonize.c
+++ b/server/daemonize.c
@@ -1,36 +1,35 @@
 /*
  * This file is part of DisOrder.
- * Copyright (C) 2004, 2005 Richard Kettlewell
+ * Copyright (C) 2004, 2005, 2007-2009 Richard Kettlewell
  *
- * This program is free software; you can redistribute it and/or modify
+ * 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
+ * the Free Software Foundation, either version 3 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.
- *
+ * 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
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/** @file server/daemonize.c
+ * @brief Go into background
  */
 
-#include <config.h>
-
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <errno.h>
-#include <sys/wait.h>
-#include <syslog.h>
-
-#include "daemonize.h"
-#include "syscalls.h"
-#include "log.h"
+#include "disorder-server.h"
 
+/** @brief Go into background
+ * @param tag Message tag, or NULL
+ * @param fac Logging facility
+ * @param pidfile Where to store PID, or NULL
+ *
+ * Become a daemon.  stdout/stderr are lost and DisOrder's logging is
+ * redirected to syslog.  It is assumed that there are no FDs beyond 2
+ * that need closing.
+ */
 void daemonize(const char *tag, int fac, const char *pidfile) {
   pid_t pid, r;
   int w, dn;
@@ -42,7 +41,7 @@ void daemonize(const char *tag, int fac, const char *pidfile) {
    * /dev/null) */
   do {
     if((dn = open("/dev/null", O_RDWR, 0)) < 0)
-      fatal(errno, "error opening /dev/null");
+      disorder_fatal(errno, "error opening /dev/null");
   } while(dn < 3);
   pid = xfork();
   if(pid) {
@@ -51,14 +50,16 @@ void daemonize(const char *tag, int fac, const char *pidfile) {
     exitfn = _exit;
     while((r = waitpid(pid, &w, 0)) == -1 && errno == EINTR)
       ;
-    if(r < 0) fatal(errno, "error calling waitpid");
-    if(w) error(0, "subprocess exited with wait status %#x", (unsigned)w);
+    if(r < 0) disorder_fatal(errno, "error calling waitpid");
+    if(w)
+      disorder_error(0, "subprocess exited with wait status %#x", (unsigned)w);
     _exit(0);
   }
   /* First child process.  This will be the session leader, and will
    * be transient. */
   D(("first child pid=%lu", (unsigned long)getpid()));
-  if(setsid() < 0) fatal(errno, "error calling setsid");
+  if(setsid() < 0)
+    disorder_fatal(errno, "error calling setsid");
   /* we'll log to syslog */
   openlog(tag, LOG_PID, fac);
   log_default = &log_syslog;
@@ -76,7 +77,7 @@ void daemonize(const char *tag, int fac, const char *pidfile) {
     if(!(fp = fopen(pidfile, "w"))
        || fprintf(fp, "%lu\n", (unsigned long)getpid()) < 0
        || fclose(fp) < 0)
-      fatal(errno, "error creating %s", pidfile);
+      disorder_fatal(errno, "error creating %s", pidfile);
   }
 }
 
@@ -86,4 +87,3 @@ c-basic-offset:2
 comment-column:40
 End:
 */
-/* arch-tag:dc74d9007ddce97d782d3dacf9aa2ed6 */