Tidying: Issues detected by gcc --fsanitize=undefined

[exim.git] / src / src / transports / autoreply.c

diff --git a/src/src/transports/autoreply.c b/src/src/transports/autoreply.c
index a1d13cd4ce32d7c54f0809ec4fb5df6324002903..e93267e4876d4d67862e3a77df852ab2ef33f325 100644 (file)
--- a/src/src/transports/autoreply.c
+++ b/src/src/transports/autoreply.c
@@ -1,10 +1,8 @@
-/* $Cambridge: exim/src/src/transports/autoreply.c,v 1.11 2009/11/16 19:50:39 nm4 Exp $ */
-
 /*************************************************
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2009 */
+/* Copyright (c) University of Cambridge 1995 - 2015 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 
@@ -159,12 +157,13 @@ if (ss == NULL)
 if (type != cke_text) for (t = ss; *t != 0; t++)
   {
   int c = *t;
+  const uschar * sp;
   if (mac_isprint(c)) continue;
   if (type == cke_hdr && c == '\n' && (t[1] == ' ' || t[1] == '\t')) continue;
-  s = string_printing(s);
+  sp = string_printing(s);
   addr->transport_return = FAIL;
   addr->message = string_sprintf("Expansion of \"%s\" in %s transport "
-    "contains non-printing character %d", s, name, c);
+    "contains non-printing character %d", sp, name, c);
   return NULL;
   }
 
@@ -189,7 +188,7 @@ Returns:      nothing
 */
 
 static void
-check_never_mail(uschar **listptr, uschar *never_mail)
+check_never_mail(uschar **listptr, const uschar *never_mail)
 {
 uschar *s = *listptr;
 
@@ -268,7 +267,6 @@ autoreply_transport_entry(
 {
 int fd, pid, rc;
 int cache_fd = -1;
-int log_fd = -1;
 int cache_size = 0;
 int add_size = 0;
 EXIM_DB *dbm_file = NULL;
@@ -381,7 +379,7 @@ remove those that match. */
 
 if (ob->never_mail != NULL)
   {
-  uschar *never_mail = expand_string(ob->never_mail);
+  const uschar *never_mail = expand_string(ob->never_mail);
 
   if (never_mail == NULL)
     {
@@ -523,16 +521,19 @@ if (oncelog != NULL && *oncelog != 0 && to != NULL)
 
   if (then != 0 && (once_repeat_sec <= 0 || now - then < once_repeat_sec))
     {
+    int log_fd;
     DEBUG(D_transport) debug_printf("message previously sent to %s%s\n", to,
       (once_repeat_sec > 0)? " and repeat time not reached" : "");
-    log_fd = Uopen(logfile, O_WRONLY|O_APPEND|O_CREAT, ob->mode);
+    log_fd = logfile ? Uopen(logfile, O_WRONLY|O_APPEND|O_CREAT, ob->mode) : -1;
     if (log_fd >= 0)
       {
       uschar *ptr = log_buffer;
       sprintf(CS ptr, "%s\n  previously sent to %.200s\n", tod_stamp(tod_log), to);
       while(*ptr) ptr++;
-      (void)write(log_fd, log_buffer, ptr - log_buffer);
-      (void)close(log_fd);
+      if(write(log_fd, log_buffer, ptr - log_buffer) != ptr-log_buffer
+        || close(log_fd))
+        DEBUG(D_transport) debug_printf("Problem writing log file %s for %s "
+          "transport\n", logfile, tblock->name);
       }
     goto END_OFF;
     }
@@ -676,6 +677,7 @@ if (ff != NULL)
       }
     else fprintf(f, "%s", CS big_buffer);
     }
+  (void) fclose(ff);
   }
 
 /* Copy the original message if required, observing the return size
@@ -755,7 +757,9 @@ if (cache_fd >= 0)
     }
 
   memcpy(cache_time, &now, sizeof(time_t));
-  (void)write(cache_fd, from, size);
+  if(write(cache_fd, from, size) != size)
+    DEBUG(D_transport) debug_printf("Problem writing cache file %s for %s "
+      "transport\n", oncelog, tblock->name);
   }
 
 /* Update DBM file */
@@ -851,8 +855,10 @@ if (logfile != NULL)
         "  %s\n", headers);
       while(*ptr) ptr++;
       }
-    (void)write(log_fd, log_buffer, ptr - log_buffer);
-    (void)close(log_fd);
+    if(write(log_fd, log_buffer, ptr - log_buffer) != ptr-log_buffer
+      || close(log_fd))
+      DEBUG(D_transport) debug_printf("Problem writing log file %s for %s "
+        "transport\n", logfile, tblock->name);
     }
   else DEBUG(D_transport) debug_printf("Failed to open log file %s for %s "
     "transport: %s\n", logfile, tblock->name, strerror(errno));