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-rw-r--r--debug/vsnprintf_chk.c46
1 files changed, 6 insertions, 40 deletions
diff --git a/debug/vsnprintf_chk.c b/debug/vsnprintf_chk.c
index 95d286f4161..666a83b7017 100644
--- a/debug/vsnprintf_chk.c
+++ b/debug/vsnprintf_chk.c
@@ -15,56 +15,22 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#include <stdarg.h>
-#include <stdio.h>
-#include "../libio/libioP.h"
-#include "../libio/strfile.h"
+#include <libio/libioP.h>
-extern const struct _IO_jump_t _IO_strn_jumps libio_vtable attribute_hidden;
/* Write formatted output into S, according to the format
string FORMAT, writing no more than MAXLEN characters. */
-/* VARARGS5 */
int
-___vsnprintf_chk (char *s, size_t maxlen, int flags, size_t slen,
- const char *format, va_list args)
+___vsnprintf_chk (char *s, size_t maxlen, int flag, size_t slen,
+ const char *format, va_list ap)
{
- /* XXX Maybe for less strict version do not fail immediately.
- Though, maxlen is supposed to be the size of buffer pointed
- to by s, so a conforming program can't pass such maxlen
- to *snprintf. */
if (__glibc_unlikely (slen < maxlen))
__chk_fail ();
- _IO_strnfile sf;
- int ret;
-#ifdef _IO_MTSAFE_IO
- sf.f._sbf._f._lock = NULL;
-#endif
-
- /* We need to handle the special case where MAXLEN is 0. Use the
- overflow buffer right from the start. */
- if (maxlen == 0)
- {
- s = sf.overflow_buf;
- maxlen = sizeof (sf.overflow_buf);
- }
-
- _IO_no_init (&sf.f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL);
- _IO_JUMPS (&sf.f._sbf) = &_IO_strn_jumps;
- s[0] = '\0';
-
- /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
+ /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
can only come from read-only format strings. */
- if (flags > 0)
- sf.f._sbf._f._flags2 |= _IO_FLAGS2_FORTIFY;
-
- _IO_str_init_static_internal (&sf.f, s, maxlen - 1, s);
- ret = __vfprintf_internal (&sf.f._sbf._f, format, args, 0);
+ unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0;
- if (sf.f._sbf._f._IO_buf_base != sf.overflow_buf)
- *sf.f._sbf._f._IO_write_ptr = '\0';
- return ret;
+ return __vsnprintf_internal (s, maxlen, format, ap, mode);
}
-ldbl_hidden_def (___vsnprintf_chk, __vsnprintf_chk)
ldbl_strong_alias (___vsnprintf_chk, __vsnprintf_chk)