From 7086e875ca3e382883f31ef4385044d77c66c035 Mon Sep 17 00:00:00 2001
From: Philip Hazel <ph10@hermes.cam.ac.uk>
Date: Thu, 14 Oct 2004 11:21:02 +0000
Subject: [PATCH] Arrange to panic-die if setitimer() ever fails. Version
 number upped in readiness for next release.

---
 doc/doc-txt/ChangeLog |  6 +++++-
 src/src/exim.c        | 11 ++++++++---
 src/src/version.c     |  4 ++--
 3 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index 83d2ff066..6e1d523b4 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -1,4 +1,4 @@
-$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.3 2004/10/11 13:24:19 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.4 2004/10/14 11:21:02 ph10 Exp $
 
 Change log file for Exim from version 4.21
 -------------------------------------------
@@ -12,6 +12,10 @@ Exim version 4.44
  2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
     computation of the current number of files was incorrect.
 
+ 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
+    bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
+    place.
+
 
 Exim version 4.43
 -----------------
diff --git a/src/src/exim.c b/src/src/exim.c
index 6d227c33e..37f206d26 100644
--- a/src/src/exim.c
+++ b/src/src/exim.c
@@ -1,4 +1,4 @@
-/* $Cambridge: exim/src/src/exim.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */
+/* $Cambridge: exim/src/src/exim.c,v 1.2 2004/10/14 11:21:02 ph10 Exp $ */
 
 /*************************************************
 *     Exim - an Internet mail transport agent    *
@@ -196,7 +196,10 @@ os_non_restarting_signal(SIGALRM, sigalrm_handler);
 
 /* This function is called by millisleep() and exim_wait_tick() to wait for a
 period of time that may include a fraction of a second. The coding is somewhat
-tedious...
+tedious. We do not expect setitimer() ever to fail, but if it does, the process 
+will wait for ever, so we panic in this instance. (There was a case of this 
+when a bug in a function that calls milliwait() caused it to pass invalid data. 
+That's when I added the check. :-)
 
 Argument:  an itimerval structure containing the interval
 Returns:   nothing
@@ -210,7 +213,9 @@ sigset_t old_sigmask;
 (void)sigemptyset(&sigmask);                           /* Empty mask */
 (void)sigaddset(&sigmask, SIGALRM);                    /* Add SIGALRM */
 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask);  /* Block SIGALRM */
-(void)setitimer(ITIMER_REAL, itval, NULL);             /* Start timer */
+if (setitimer(ITIMER_REAL, itval, NULL) < 0)           /* Start timer */
+  log_write(0, LOG_MAIN|LOG_PANIC_DIE, 
+    "setitimer() failed: %s", strerror(errno)); 
 (void)sigfillset(&sigmask);                            /* All signals */
 (void)sigdelset(&sigmask, SIGALRM);                    /* Remove SIGALRM */
 (void)sigsuspend(&sigmask);                            /* Until SIGALRM */
diff --git a/src/src/version.c b/src/src/version.c
index 16554ad6e..6391d13bf 100644
--- a/src/src/version.c
+++ b/src/src/version.c
@@ -1,4 +1,4 @@
-/* $Cambridge: exim/src/src/version.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */
+/* $Cambridge: exim/src/src/version.c,v 1.2 2004/10/14 11:21:02 ph10 Exp $ */
 
 /*************************************************
 *     Exim - an Internet mail transport agent    *
@@ -12,7 +12,7 @@
 #include "exim.h"
 
 
-#define THIS_VERSION  "4.43"
+#define THIS_VERSION  "4.44"
 
 
 /* The header file cnumber.h contains a single line containing the
-- 
2.25.1