Fix logging of cmdline args when starting in an unlinked cwd. Bug 2274

[users/heiko/exim.git] / src / exim_monitor / em_log.c

diff --git a/src/exim_monitor/em_log.c b/src/exim_monitor/em_log.c
index 5f0f9b29d9a3c70d83f4e3d34d3e680f7486d514..52eef6b2096ff8b994c31ed8ed424fcbc2f90c3e 100644 (file)
--- a/src/exim_monitor/em_log.c
+++ b/src/exim_monitor/em_log.c
@@ -1,13 +1,11 @@
-/* $Cambridge: exim/src/exim_monitor/em_log.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */
-
 /*************************************************
 *                 Exim Monitor                   *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2004 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
 /* See the file NOTICE for conditions of use and distribution. */
 
-/* This module contains code for scanning the smaill log,
+/* This module contains code for scanning the main log,
 extracting information from it, and displaying a "tail". */
 
 #include "em_hdr.h"
@@ -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)
     {
@@ -250,14 +254,20 @@ if (LOG != NULL)
       }
 
     /* Munge the log entry and display shortened form on one line.
-    We omit the date and show only the time. Remove any time zone offset. */
+    We omit the date and show only the time. Remove any time zone offset.
+    Take note of the presence of [pid]. */
 
     if (pcre_exec(yyyymmdd_regex,NULL,CS buffer,length,0,PCRE_EOPT,NULL,0) >= 0)
       {
+      int pidlength = 0;
       if ((buffer[20] == '+' || buffer[20] == '-') &&
           isdigit(buffer[21]) && buffer[25] == ' ')
         memmove(buffer + 20, buffer + 26, Ustrlen(buffer + 26) + 1);
-      id = string_copyn(buffer + 20, MESSAGE_ID_LENGTH);
+      if (buffer[20] == '[')
+        {
+        while (Ustrchr("[]0123456789", buffer[20+pidlength++]) != NULL);
+        }
+      id = string_copyn(buffer + 20 + pidlength, MESSAGE_ID_LENGTH);
       show_log("%s", buffer+11);
       }
     else
@@ -271,12 +281,8 @@ if (LOG != NULL)
     if (strstric(buffer, US"frozen", FALSE) != NULL)
       {
       queue_item *qq = find_queue(id, queue_noop, 0);
-      if (qq != NULL)
-        {
-        if (strstric(buffer, US"unfrozen", FALSE) != NULL)
-          qq->frozen = FALSE;
-        else qq->frozen = TRUE;
-        }
+      if (qq)
+        qq->frozen = strstric(buffer, US"unfrozen", FALSE) == NULL;
       }
 
     /* Notice defer messages, and add the destination if it
@@ -358,6 +364,8 @@ 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)
     {
@@ -385,7 +393,11 @@ 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;
     }
   }