fortify-headers

standalone fortify-source implementation
git clone git://git.2f30.org/fortify-headers.git
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commit 33d2ff5aa8b0bee2ba886857db4acfa9126e8b6d
parent 2f0e3f574f74e85f2a38aebc141f3d6fbc380910
Author: sin <sin@2f30.org>
Date:   Sat Feb 28 15:30:25 +0000

Add ttyname_r() check

Diffstat:
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)