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-rw-r--r--debug/vsprintf_chk.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/debug/vsprintf_chk.c b/debug/vsprintf_chk.c
new file mode 100644
index 0000000000..83383286da
--- /dev/null
+++ b/debug/vsprintf_chk.c
@@ -0,0 +1,91 @@
+/* Copyright (C) 1994, 1997, 1999-2003, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include "../libio/libioP.h"
+#include "../libio/strfile.h"
+
+
+static int _IO_str_chk_overflow (_IO_FILE *fp, int c) __THROW;
+
+static int
+_IO_str_chk_overflow (fp, c)
+ _IO_FILE *fp;
+ int c;
+{
+ /* When we come to here this means the user supplied buffer is
+ filled. */
+ __chk_fail ();
+}
+
+
+static const struct _IO_jump_t _IO_str_chk_jumps =
+{
+ JUMP_INIT_DUMMY,
+ JUMP_INIT(finish, _IO_str_finish),
+ JUMP_INIT(overflow, _IO_str_chk_overflow),
+ JUMP_INIT(underflow, INTUSE(_IO_str_underflow)),
+ JUMP_INIT(uflow, INTUSE(_IO_default_uflow)),
+ JUMP_INIT(pbackfail, INTUSE(_IO_str_pbackfail)),
+ JUMP_INIT(xsputn, INTUSE(_IO_default_xsputn)),
+ JUMP_INIT(xsgetn, INTUSE(_IO_default_xsgetn)),
+ JUMP_INIT(seekoff, INTUSE(_IO_str_seekoff)),
+ JUMP_INIT(seekpos, _IO_default_seekpos),
+ JUMP_INIT(setbuf, _IO_default_setbuf),
+ JUMP_INIT(sync, _IO_default_sync),
+ JUMP_INIT(doallocate, INTUSE(_IO_default_doallocate)),
+ JUMP_INIT(read, _IO_default_read),
+ JUMP_INIT(write, _IO_default_write),
+ JUMP_INIT(seek, _IO_default_seek),
+ JUMP_INIT(close, _IO_default_close),
+ JUMP_INIT(stat, _IO_default_stat),
+ JUMP_INIT(showmanyc, _IO_default_showmanyc),
+ JUMP_INIT(imbue, _IO_default_imbue)
+};
+
+
+int
+__vsprintf_chk (char *s, int flags, size_t slen, const char *format,
+ va_list args)
+{
+ _IO_strfile f;
+ int ret;
+#ifdef _IO_MTSAFE_IO
+ f._sbf._f._lock = NULL;
+#endif
+
+ if (slen == 0)
+ __chk_fail ();
+
+ _IO_no_init (&f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL);
+ _IO_JUMPS ((struct _IO_FILE_plus *) &f._sbf) = &_IO_str_chk_jumps;
+ s[0] = '\0';
+ _IO_str_init_static_internal (&f, s, slen - 1, s);
+
+ /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
+ can only come from read-only format strings. */
+ if (flags > 0)
+ f._sbf._f._flags2 |= _IO_FLAGS2_CHECK_PERCENT_N;
+
+ ret = INTUSE(_IO_vfprintf) ((_IO_FILE *) &f._sbf, format, args);
+
+ *f._sbf._f._IO_write_ptr = '\0';
+ return ret;
+}
+libc_hidden_def (__vsprintf_chk)