From a494b1e1085547c1f1fb9429081bc2666b21fdc1 Mon Sep 17 00:00:00 2001
From: Philip Hazel <ph10@hermes.cam.ac.uk>
Date: Mon, 18 Oct 2004 09:26:02 +0000
Subject: [PATCH] If setrlimit() barfs at 1000 file descriptors, try for 256 to
 accommodate those old OS for which this is the upper limit.

---
 doc/doc-txt/ChangeLog |  9 +++++++--
 src/src/exim.c        | 15 ++++++++++++---
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index c27cbbef5..2283f726f 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -1,4 +1,4 @@
-$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.7 2004/10/18 09:16:57 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.8 2004/10/18 09:26:02 ph10 Exp $
 
 Change log file for Exim from version 4.21
 -------------------------------------------
@@ -25,7 +25,12 @@ Exim version 4.44
     now done for all such subprocesses. The other cases are: ${run, transport
     filters, and the commands run by the lmtp and pipe transports.
 
- 5. Added CONFIGURE_GROUP build-time option.
+ 6. Added CONFIGURE_GROUP build-time option.
+
+ 7. Some older OS have a limit of 256 on the maximum number of file
+    descriptors. Exim was using setrlimit() to set 1000 as a large value
+    unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
+    systems. I've change it so that if it can't get 1000, it tries for 256.
 
 
 Exim version 4.43
diff --git a/src/src/exim.c b/src/src/exim.c
index bfdcbc6e0..dcf261879 100644
--- a/src/src/exim.c
+++ b/src/src/exim.c
@@ -1,4 +1,4 @@
-/* $Cambridge: exim/src/src/exim.c,v 1.3 2004/10/18 09:16:57 ph10 Exp $ */
+/* $Cambridge: exim/src/src/exim.c,v 1.4 2004/10/18 09:26:02 ph10 Exp $ */
 
 /*************************************************
 *     Exim - an Internet mail transport agent    *
@@ -2837,12 +2837,21 @@ else
       strerror(errno));
     rlp.rlim_cur = rlp.rlim_max = 0;
     }
+    
+  /* I originally chose 1000 as a nice big number that was unlikely to 
+  be exceeded. It turns out that some older OS have a fixed upper limit of
+  256. */
+     
   if (rlp.rlim_cur < 1000)
     {
     rlp.rlim_cur = rlp.rlim_max = 1000;
     if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
-      log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
-        strerror(errno));
+      { 
+      rlp.rlim_cur = rlp.rlim_max = 256;
+      if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
+        log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
+          strerror(errno));
+      } 
     }
   #endif
 
-- 
2.25.1