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author | gcc <gcc@7b3dc134-2b1b-0410-93df-9e9f96275f8d> | 2006-08-17 01:18:26 +0000 |
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committer | gcc <gcc@7b3dc134-2b1b-0410-93df-9e9f96275f8d> | 2006-08-17 01:18:26 +0000 |
commit | 15f34685e7a9b5caf761af2ebf6afa20438d440b (patch) | |
tree | dc04ce3cdf040f198743c15b64557824de174680 /libc/debug/vsprintf_chk.c | |
parent | 1e848e0e775a36f6359161f5deb890942ef42ff3 (diff) | |
download | eglibc2-15f34685e7a9b5caf761af2ebf6afa20438d440b.tar.gz |
Import glibc-mainline for 2006-08-16
git-svn-id: svn://svn.eglibc.org/fsf/trunk@4 7b3dc134-2b1b-0410-93df-9e9f96275f8d
Diffstat (limited to 'libc/debug/vsprintf_chk.c')
-rw-r--r-- | libc/debug/vsprintf_chk.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/libc/debug/vsprintf_chk.c b/libc/debug/vsprintf_chk.c new file mode 100644 index 000000000..6538064dc --- /dev/null +++ b/libc/debug/vsprintf_chk.c @@ -0,0 +1,93 @@ +/* Copyright (C) 1994, 1997, 1999-2003, 2004, 2006 + 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_FORTIFY; + + ret = INTUSE(_IO_vfprintf) ((_IO_FILE *) &f._sbf, format, args); + + *f._sbf._f._IO_write_ptr = '\0'; + return ret; +} +ldbl_hidden_def (___vsprintf_chk, __vsprintf_chk) +ldbl_strong_alias (___vsprintf_chk, __vsprintf_chk) |