diff options
Diffstat (limited to 'debug/fprintf_chk.c')
| -rw-r--r-- | debug/fprintf_chk.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/debug/fprintf_chk.c b/debug/fprintf_chk.c index cff4438afb..14afc073b2 100644 --- a/debug/fprintf_chk.c +++ b/debug/fprintf_chk.c @@ -16,29 +16,23 @@ <http://www.gnu.org/licenses/>. */ #include <stdarg.h> -#include <stdio.h> -#include "../libio/libioP.h" +#include <libio/libioP.h> /* Write formatted output to FP from the format string FORMAT. */ int ___fprintf_chk (FILE *fp, int flag, const char *format, ...) { + /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n + can only come from read-only format strings. */ + unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0; va_list ap; - int done; - - _IO_acquire_lock_clear_flags2 (fp); - if (flag > 0) - fp->_flags2 |= _IO_FLAGS2_FORTIFY; + int ret; va_start (ap, format); - done = vfprintf (fp, format, ap); + ret = __vfprintf_internal (fp, format, ap, mode); va_end (ap); - if (flag > 0) - fp->_flags2 &= ~_IO_FLAGS2_FORTIFY; - _IO_release_lock (fp); - - return done; + return ret; } ldbl_strong_alias (___fprintf_chk, __fprintf_chk) |