From b23b175f8f7701e17e888b152adb57409d618d33 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Wilfried=20G=C3=B6esgens?= <willi@citadel.org>
Date: Wed, 25 Mar 2009 23:18:46 +0000
Subject: [PATCH] * make some pointers const... * trace whether we were shut
 down regular, or we crashed/were killed/... * send an aide message if we
 unconditionaly exit.

---
 citadel/msgbase.c      |  4 ++--
 citadel/msgbase.h      |  2 +-
 citadel/server_main.c  |  8 ++++++++
 citadel/sysdep.c       | 32 ++++++++++++++++++++++++++++++--
 citadel/sysdep_decls.h |  1 +
 5 files changed, 42 insertions(+), 5 deletions(-)

diff --git a/citadel/msgbase.c b/citadel/msgbase.c
index 8a1424a1b..60648431e 100644
--- a/citadel/msgbase.c
+++ b/citadel/msgbase.c
@@ -3031,8 +3031,8 @@ long CtdlSubmitMsg(struct CtdlMessage *msg,	/* message to save */
 /*
  * Convenience function for generating small administrative messages.
  */
-void quickie_message(char *from, char *fromaddr, char *to, char *room, char *text, 
-			int format_type, char *subject)
+void quickie_message(const char *from, const char *fromaddr, char *to, char *room, const char *text, 
+			int format_type, const char *subject)
 {
 	struct CtdlMessage *msg;
 	struct recptypes *recp = NULL;
diff --git a/citadel/msgbase.h b/citadel/msgbase.h
index 560977361..4d4876791 100644
--- a/citadel/msgbase.h
+++ b/citadel/msgbase.h
@@ -100,7 +100,7 @@ void cmd_dlat (char *cmdbuf);
 long send_message (struct CtdlMessage *);
 void loadtroom (void);
 long CtdlSubmitMsg(struct CtdlMessage *, struct recptypes *, char *, int);
-void quickie_message (char *, char *, char *, char *, char *, int, char *);
+void quickie_message (const char *, const char *, char *, char *, const char *, int, const char *);
 void cmd_ent0 (char *entargs);
 void cmd_dele (char *delstr);
 void cmd_move (char *args);
diff --git a/citadel/server_main.c b/citadel/server_main.c
index 2d7d65717..b3d110cd8 100644
--- a/citadel/server_main.c
+++ b/citadel/server_main.c
@@ -310,6 +310,14 @@ int main(int argc, char **argv)
 		start_chkpwd_daemon();
 	}
 
+
+	/*
+	 * check, whether we're fired up another time after a crash.
+	 * if, post an aide message, so the admin has a chance to react.
+	 */
+	checkcrash ();
+
+
 	/*
 	 * Now that we've bound the sockets, change to the Citadel user id and its
 	 * corresponding group ids
diff --git a/citadel/sysdep.c b/citadel/sysdep.c
index 995742b40..359b4c33b 100644
--- a/citadel/sysdep.c
+++ b/citadel/sysdep.c
@@ -896,6 +896,9 @@ void graceful_shutdown(int signum) {
 	exit(0);
 }
 
+int nFireUps = 0;
+int nFireUpsNonRestart = 0;
+pid_t ForkedPid = 1;
 
 /*
  * Start running as a daemon.
@@ -951,9 +954,8 @@ void start_daemon(int unused) {
 			}
 			waitpid(current_child, &status, 0);
 		}
-
 		do_restart = 0;
-
+		nFireUpsNonRestart = nFireUps;
 		/* Did the main process exit with an actual exit code? */
 		if (WIFEXITED(status)) {
 
@@ -970,12 +972,16 @@ void start_daemon(int unused) {
 			/* Any other exit code means we should restart. */
 			else {
 				do_restart = 1;
+				nFireUps++;
+				ForkedPid = current_child;
 			}
 		}
 
 		/* Any other type of termination (signals, etc.) should also restart. */
 		else {
 			do_restart = 1;
+			nFireUps++;
+			ForkedPid = current_child;
 		}
 
 	} while (do_restart);
@@ -986,6 +992,28 @@ void start_daemon(int unused) {
 
 
 
+void checkcrash(void)
+{
+	if (nFireUpsNonRestart != nFireUps)
+	{
+		StrBuf *CrashMail;
+
+		CrashMail = NewStrBuf();
+		CtdlLogPrintf (CTDL_ALERT, "----------------sending crash mail\n");
+		StrBufPrintf(CrashMail, 
+			     "Your CitServer is just recovering from an unexpected termination.\n"
+			     " this maybe the result of an error in citserver or an external influence.\n"
+			     " You can get more information on this by enabling coredumping; for more information see\n"
+			     " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files\n"
+			     " If you already did, the file you're looking for most probably is %score.%d\n"
+			     " Yours faithfully...",
+			     ctdl_run_dir, ForkedPid);
+		aide_message(ChrPtr(CrashMail), "Citadel server crashed.");
+		FreeStrBuf(&CrashMail);
+	}
+}
+
+
 /*
  * Generic routine to convert a login name to a full name (gecos)
  * Returns nonzero if a conversion took place
diff --git a/citadel/sysdep_decls.h b/citadel/sysdep_decls.h
index 8a16f7305..802ae3305 100644
--- a/citadel/sysdep_decls.h
+++ b/citadel/sysdep_decls.h
@@ -70,6 +70,7 @@ void sysdep_master_cleanup (void);
 void kill_session (int session_to_kill);
 void *sd_context_loop (struct CitContext *con);
 void start_daemon (int do_close_stdio);
+void checkcrash(void);
 void cmd_nset (char *cmdbuf);
 int convert_login (char *NameToConvert);
 void *worker_thread (void *arg);
-- 
2.30.2