X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/0a49a7a4f1090b6f1ce1d0f9d969804c9226b53e..d5c0d8c9374623620844d539d4810da63e9abca1:/src/exim_monitor/em_log.c

diff --git a/src/exim_monitor/em_log.c b/src/exim_monitor/em_log.c
index 8cad78245..9ff994ced 100644
--- a/src/exim_monitor/em_log.c
+++ b/src/exim_monitor/em_log.c
@@ -1,10 +1,8 @@
-/* $Cambridge: exim/src/exim_monitor/em_log.c,v 1.6 2009/11/16 19:50:36 nm4 Exp $ */
-
 /*************************************************
 *                 Exim Monitor                   *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2009 */
+/* Copyright (c) University of Cambridge 1995 - 2016 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* This module contains code for scanning the main log,
@@ -58,6 +56,8 @@ static int scrolled = FALSE;
 static int size = 0;
 static int top = 0;
 
+static void show_log(char *s, ...) PRINTF_FUNCTION(1,2);
+
 static void show_log(char *s, ...)
 {
 int length, newtop;
@@ -217,7 +217,11 @@ uschar buffer[log_buffer_len];
 
 if (LOG != NULL)
   {
-  fseek(LOG, log_position, SEEK_SET);
+  if (fseek(LOG, log_position, SEEK_SET))
+    {
+    perror("logfile fseek");
+    exit(1);
+    }
 
   while (Ufgets(buffer, log_buffer_len, LOG) != NULL)
     {
@@ -364,6 +368,8 @@ link count of zero on the currently open file. */
 if (log_datestamping)
   {
   uschar log_file_wanted[256];
+  /* Do *not* use "%s" here, we need the %D datestamp in the log_file to
+   *   be expanded! */
   string_format(log_file_wanted, sizeof(log_file_wanted), CS log_file);
   if (Ustrcmp(log_file_wanted, log_file_open) != 0)
     {
@@ -391,7 +397,11 @@ if (LOG == NULL ||
     {
     if (LOG != NULL) fclose(LOG);
     LOG = TEST;
-    fstat(fileno(LOG), &statdata);
+    if (fstat(fileno(LOG), &statdata))
+      {
+      fprintf(stderr, "fstat %s: %s\n", log_file_open, strerror(errno));
+      exit(1);
+      }
     log_inode = statdata.st_ino;
     }
   }