1 | /* Copyright (C) 1994-2017 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <stdarg.h> |
19 | #include <stdio.h> |
20 | #include "../libio/libioP.h" |
21 | #include "../libio/strfile.h" |
22 | |
23 | |
24 | static int _IO_str_chk_overflow (_IO_FILE *fp, int c) __THROW; |
25 | |
26 | static int |
27 | _IO_str_chk_overflow (_IO_FILE *fp, int c) |
28 | { |
29 | /* When we come to here this means the user supplied buffer is |
30 | filled. */ |
31 | __chk_fail (); |
32 | } |
33 | |
34 | |
35 | static const struct _IO_jump_t _IO_str_chk_jumps libio_vtable = |
36 | { |
37 | JUMP_INIT_DUMMY, |
38 | JUMP_INIT(finish, _IO_str_finish), |
39 | JUMP_INIT(overflow, _IO_str_chk_overflow), |
40 | JUMP_INIT(underflow, _IO_str_underflow), |
41 | JUMP_INIT(uflow, _IO_default_uflow), |
42 | JUMP_INIT(pbackfail, _IO_str_pbackfail), |
43 | JUMP_INIT(xsputn, _IO_default_xsputn), |
44 | JUMP_INIT(xsgetn, _IO_default_xsgetn), |
45 | JUMP_INIT(seekoff, _IO_str_seekoff), |
46 | JUMP_INIT(seekpos, _IO_default_seekpos), |
47 | JUMP_INIT(setbuf, _IO_default_setbuf), |
48 | JUMP_INIT(sync, _IO_default_sync), |
49 | JUMP_INIT(doallocate, _IO_default_doallocate), |
50 | JUMP_INIT(read, _IO_default_read), |
51 | JUMP_INIT(write, _IO_default_write), |
52 | JUMP_INIT(seek, _IO_default_seek), |
53 | JUMP_INIT(close, _IO_default_close), |
54 | JUMP_INIT(stat, _IO_default_stat), |
55 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
56 | JUMP_INIT(imbue, _IO_default_imbue) |
57 | }; |
58 | |
59 | |
60 | int |
61 | ___vsprintf_chk (char *s, int flags, size_t slen, const char *format, |
62 | va_list args) |
63 | { |
64 | _IO_strfile f; |
65 | int ret; |
66 | #ifdef _IO_MTSAFE_IO |
67 | f._sbf._f._lock = NULL; |
68 | #endif |
69 | |
70 | if (slen == 0) |
71 | __chk_fail (); |
72 | |
73 | _IO_no_init (&f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL); |
74 | _IO_JUMPS (&f._sbf) = &_IO_str_chk_jumps; |
75 | s[0] = '\0'; |
76 | _IO_str_init_static_internal (&f, s, slen - 1, s); |
77 | |
78 | /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n |
79 | can only come from read-only format strings. */ |
80 | if (flags > 0) |
81 | f._sbf._f._flags2 |= _IO_FLAGS2_FORTIFY; |
82 | |
83 | ret = _IO_vfprintf (&f._sbf._f, format, args); |
84 | |
85 | *f._sbf._f._IO_write_ptr = '\0'; |
86 | return ret; |
87 | } |
88 | ldbl_hidden_def (___vsprintf_chk, __vsprintf_chk) |
89 | ldbl_strong_alias (___vsprintf_chk, __vsprintf_chk) |
90 | |