fortify-headers

commit 33d2ff5aa8b0bee2ba886857db4acfa9126e8b6d
parent 2f0e3f574f74e85f2a38aebc141f3d6fbc380910
Author: sin <sin@2f30.org>
Date:   Sat, 28 Feb 2015 15:30:25 +0000

Add ttyname_r() check

Diffstat:
M
include/unistd.h
 | 
13
+++++++++++++

1 file changed, 13 insertions(+), 0 deletions(-)
diff --git a/include/unistd.h b/include/unistd.h
@@ -96,6 +96,17 @@ __fortify_read(int fd, void *buf, size_t n)
 }
 
 static inline __attribute__ ((always_inline))
+int
+__fortify_ttyname_r(int fd, char *name, size_t n)
+{
+	size_t bos = __builtin_object_size(name, 0);
+
+	if (n > bos)
+		__builtin_trap();
+	return ttyname_r(fd, name, n);
+}
+
+static inline __attribute__ ((always_inline))
 ssize_t
 __fortify_write(int fd, const void *buf, size_t n)
 {
@@ -126,6 +137,8 @@ __fortify_write(int fd, const void *buf, size_t n)
 #define pread(fd, buf, n, offset) __fortify_pread(fd, buf, n, offset)
 #undef read
 #define read(fd, buf, n) __fortify_read(fd, buf, n)
+#undef ttyname_r
+#define ttyname_r(fd, name, n) __fortify_ttyname_r(fd, name, n)
 #undef write
 #define write(fd, buf, n) __fortify_write(fd, buf, n)