X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/0a49a7a4f1090b6f1ce1d0f9d969804c9226b53e..c3d6f1ff09458b3e7619f9bc4799aec0ab5fc2f2:/src/src/dummies.c

diff --git a/src/src/dummies.c b/src/src/dummies.c
index 23869f964..38b514b6c 100644
--- a/src/src/dummies.c
+++ b/src/src/dummies.c
@@ -1,10 +1,9 @@
-/* $Cambridge: exim/src/src/dummies.c,v 1.5 2009/11/16 19:50:36 nm4 Exp $ */
-
 /*************************************************
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
 /* Copyright (c) University of Cambridge 1995 - 2009 */
+/* Copyright (c) The Exim Maintainers 2021 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* This file is not part of the main Exim code. There are little bits of test
@@ -22,7 +21,7 @@ alternates. */
 /* We don't have the full Exim headers dragged in, but this function
 is used for debugging output. */
 
-extern int  string_vformat(char *, int, char *, va_list);
+extern gstring * string_vformat(gstring *, unsigned, const char *, va_list);
 
 
 /*************************************************
@@ -49,8 +48,6 @@ va_start(ap, format);
 vfprintf(stderr, format, ap);
 fprintf(stderr, "\n");
 va_end(ap);
-selector = selector;     /* Keep picky compilers happy */
-flags = flags;
 }
 
 
@@ -58,7 +55,9 @@ flags = flags;
 *      Handle calls to print debug output        *
 *************************************************/
 
-/* The message just gets written to stderr
+/* The message just gets written to stderr.
+We use tainted memory to format into just so that we can handle
+tainted arguments.
 
 Arguments:
   format    a printf() format
@@ -71,22 +70,24 @@ void
 debug_printf(char *format, ...)
 {
 va_list ap;
-char buffer[1024];
+rmark reset_point = store_mark();
+gstring * g = string_get_tainted(1024, TRUE);
 
 va_start(ap, format);
 
-if (!string_vformat(buffer, sizeof(buffer), format, ap))
+if (!string_vformat(g, 0, format, ap))
   {
-  char *s = "**** debug string overflowed buffer ****\n";
-  char *p = buffer + (int)strlen(buffer);
-  int maxlen = sizeof(buffer) - (int)strlen(s) - 3;
-  if (p > buffer + maxlen) p = buffer + maxlen;
-  if (p > buffer && p[-1] != '\n') *p++ = '\n';
+  char * s = "**** debug string overflowed buffer ****\n";
+  char * p = CS g->s + g->ptr;
+  int maxlen = g->size - (int)strlen(s) - 3;
+  if (p > g->s + maxlen) p = g->s + maxlen;
+  if (p > g->s && p[-1] != '\n') *p++ = '\n';
   strcpy(p, s);
   }
 
-fprintf(stderr, "%s", buffer);
+fprintf(stderr, "%s", string_from_gstring(g));
 fflush(stderr);
+store_reset(reset_point);
 va_end(ap);
 }
 
@@ -101,8 +102,7 @@ extern int sigalrm_seen;
 void
 sigalrm_handler(int sig)
 {
-sig = sig;            /* Keep picky compilers happy */
-sigalrm_seen = 1;
+sigalrm_seen = TRUE;
 }
 
 
@@ -114,19 +114,12 @@ sigalrm_seen = 1;
 int
 header_checkname(void *h, char *name, int len)
 {
-h = h;            /* Keep picky compilers happy */
-name = name;
-len = len;
 return 0;
 }
 
 void
 directory_make(char *parent, char *name, int mode, int panic)
 {
-parent = parent;  /* Keep picky compilers happy */
-name = name;
-mode = mode;
-panic = panic;
 }
 
 void
@@ -138,10 +131,6 @@ host_build_sender_fullhost(void) { }
 char *
 host_ntoa(int type, const void *arg, char *buffer, int *portptr)
 {
-type = type;      /* Keep picky compilers happy */
-arg = arg;
-buffer = buffer;
-portptr = portptr;
 return NULL;
 }
 #endif