Ticket #333: Added buffer overflow detection in vsprintf emulation for Symbian
git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@1361 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjlib/src/pj/compat/string_compat.c b/pjlib/src/pj/compat/string_compat.c
index 28f1312..d87bb96 100644
--- a/pjlib/src/pj/compat/string_compat.c
+++ b/pjlib/src/pj/compat/string_compat.c
@@ -19,6 +19,8 @@
#include <pj/types.h>
#include <pj/compat/string.h>
#include <pj/ctype.h>
+#include <pj/assert.h>
+
#if defined(PJ_HAS_STRING_H) && PJ_HAS_STRING_H != 0
/* Nothing to do */
@@ -64,8 +66,16 @@
PJ_DEF(int) vsnprintf(char *s1, pj_size_t len, const char *s2, va_list arg)
{
- PJ_UNUSED_ARG(len);
- return vsprintf(s1,s2,arg);
+#define MARK_CHAR ((char)255)
+ int rc;
+
+ s1[len-1] = MARK_CHAR;
+
+ rc = vsprintf(s1,s2,arg);
+
+ pj_assert(s1[len-1] == MARK_CHAR || s1[len-1] == '\0');
+
+ return rc;
}
#endif