Use retval from sprintf while walking buffers

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

diff --git a/src/src/parse.c b/src/src/parse.c
index 9b7069f9efb36c617f6ba9ec65809014186ec8b9..a7231f39b5b80c0d5f1d1bcc9be0b8971872393a 100644 (file)
--- a/src/src/parse.c
+++ b/src/src/parse.c
@@ -2,7 +2,7 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2015 */
+/* Copyright (c) University of Cambridge 1995 - 2017 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* Functions for parsing addresses */
@@ -187,7 +187,7 @@ The start of the last potential comment position is remembered to
 make it possible to ignore comments at the end of compound items.
 
 Argument: current character pointer
-Regurns:  new character pointer
+Returns:  new character pointer
 */
 
 static uschar *
@@ -661,7 +661,7 @@ if (*s != '@' && *s != '<')
   while (*s != '<' && (!parse_allow_group || *s != ':'))
     {
     s = read_local_part(s, t, errorptr, FALSE);
-    if (*errorptr != NULL)
+    if (*errorptr)
       {
       *errorptr = string_sprintf("%s (expected word or \"<\")", *errorptr);
       goto PARSE_FAILED;
@@ -686,8 +686,8 @@ processing it. Note that this is "if" rather than "else if" because it's also
 used after reading a preceding phrase.
 
 There are a lot of broken sendmails out there that put additional pairs of <>
-round <route-addr>s. If strip_excess_angle_brackets is set, allow any number of
-them, as long as they match. */
+round <route-addr>s.  If strip_excess_angle_brackets is set, allow a limited
+number of them, as long as they match. */
 
 if (*s == '<')
   {
@@ -696,8 +696,11 @@ if (*s == '<')
   int bracket_count = 1;
 
   s++;
-  if (strip_excess_angle_brackets)
-    while (*s == '<') { bracket_count++; s++; }
+  if (strip_excess_angle_brackets) while (*s == '<')
+   {
+   if(bracket_count++ > 5) FAILED(US"angle-brackets nested too deep");
+   s++;
+   }
 
   t = yield;
   startptr = s;
@@ -711,7 +714,7 @@ if (*s == '<')
   if (*s == '@')
     {
     s = read_route(s, t, errorptr);
-    if (*errorptr != NULL) goto PARSE_FAILED;
+    if (*errorptr) goto PARSE_FAILED;
     *t = 0;                  /* Ensure route is ignored - probably overkill */
     source_routed = TRUE;
     }
@@ -729,7 +732,7 @@ if (*s == '<')
   else
     {
     s = read_addr_spec(s, t, '>', errorptr, &domainptr);
-    if (*errorptr != NULL) goto PARSE_FAILED;
+    if (*errorptr) goto PARSE_FAILED;
     *domain = domainptr - yield;
     if (source_routed && *domain == 0)
       FAILED(US"domain missing in source-routed address");
@@ -739,9 +742,10 @@ if (*s == '<')
   if (*errorptr != NULL) goto PARSE_FAILED;
   while (bracket_count-- > 0) if (*s++ != '>')
     {
-    *errorptr = (s[-1] == 0)? US"'>' missing at end of address" :
-      string_sprintf("malformed address: %.32s may not follow %.*s",
-        s-1, s - (uschar *)mailbox - 1, mailbox);
+    *errorptr = s[-1] == 0
+      ? US"'>' missing at end of address"
+      : string_sprintf("malformed address: %.32s may not follow %.*s",
+         s-1, s - (uschar *)mailbox - 1, mailbox);
     goto PARSE_FAILED;
     }
 
@@ -909,8 +913,7 @@ for (; len > 0; len--)
       }
     else
       {
-      sprintf(CS t, "=%02X", ch);
-      while (*t != 0) t++;
+      t += sprintf(CS t, "=%02X", ch);
       coded = TRUE;
       first_byte = !first_byte;
       }
@@ -1444,7 +1447,7 @@ for (;;)
       with a flag that fails symlinks. */
 
       {
-      int fd = open(directory, O_RDONLY);
+      int fd = open(CS directory, O_RDONLY);
       if (fd < 0)
        {
        *error = string_sprintf("failed to open directory %s", directory);
@@ -1460,7 +1463,7 @@ for (;;)
        temp = *p;
        *p = '\0';
 
-       fd2 = openat(fd, q, O_RDONLY|O_NOFOLLOW);
+       fd2 = openat(fd, CS q, O_RDONLY|O_NOFOLLOW);
        close(fd);
        *p = temp;
        if (fd2 < 0)