fortify-headers

commit f05c09fac82907ed0f05adaffe10c3832a245297
parent eecef18261cc278fbc13ecbfb4e5bc10762cc794
Author: sin <sin@2f30.org>
Date:   Tue, 24 Feb 2015 19:04:02 +0000

Add realpath() check

Diffstat:
A
include/stdlib.h
 | 
35
+++++++++++++++++++++++++++++++++++

1 file changed, 35 insertions(+), 0 deletions(-)
diff --git a/include/stdlib.h b/include/stdlib.h
@@ -0,0 +1,35 @@
+#ifndef FORTIFY_STDLIB_H_
+#define FORTIFY_STDLIB_H_
+
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
+#include_next <limits.h>
+#endif
+
+#include_next <stdlib.h>
+
+#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
+
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
+static inline __attribute__ ((always_inline))
+char *
+__fortify_realpath(const char *path, char *resolved)
+{
+	size_t bos;
+
+	if (resolved) {
+		bos = __builtin_object_size(resolved, 0);
+		if (PATH_MAX > bos)
+			__builtin_trap();
+	}
+	return realpath(path, resolved);
+}
+
+#undef realpath
+#define realpath(path, resolved) __fortify_realpath(path, resolved)
+#endif
+
+#endif
+
+#endif