SECURITY: DKIM DNS buffer overflow protection

[exim.git] / src / src / log.c

diff --git a/src/src/log.c b/src/src/log.c
index bfd1fef86efc15c1a447cbb18556b5e53231cf98..3a91ed295d3f6b0315bca29231606604cc5e0f74 100644 (file)
--- a/src/src/log.c
+++ b/src/src/log.c
@@ -2,7 +2,7 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2009 */
+/* Copyright (c) University of Cambridge 1995 - 2012 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* Functions for writing log files. The code for maintaining datestamped
@@ -528,11 +528,11 @@ Returns:
   length actually written, persisting an errno from write()
 */
 ssize_t
-write_to_fd_buf(int fd, uschar *buf, size_t length)
+write_to_fd_buf(int fd, const uschar *buf, size_t length)
 {
 ssize_t wrote;
 size_t total_written = 0;
-uschar *p = buf;
+const uschar *p = buf;
 size_t left = length;
 
 while (1)
@@ -1306,7 +1306,7 @@ misconfiguration.
 
 The first use of this is in ACL logic, "control = debug/tag=foo/opts=+expand"
 which can be combined with conditions, etc, to activate extra logging only
-for certain sources. */
+for certain sources. The second use is inetd wait mode debug preservation. */
 
 void
 debug_logging_activate(uschar *tag_name, uschar *opts)
@@ -1316,7 +1316,7 @@ int fd = -1;
 if (debug_file)
   {
   debug_printf("DEBUGGING ACTIVATED FROM WITHIN CONFIG.\n"
-      "DEBUG: Tag=\"%s\" Opts=\"%s\"\n", tag_name, opts);
+      "DEBUG: Tag=\"%s\" Opts=\"%s\"\n", tag_name, opts ? opts : US"");
   return;
   }