1/* Copyright (C) 1991-2023 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 <https://www.gnu.org/licenses/>. */
17
18#include <stdarg.h>
19#include <libio/libioP.h>
20
21
22/* Write formatted output from FORMAT to a string which is
23 allocated with malloc and stored in *STRING_PTR. */
24int
25___asprintf_chk (char **result_ptr, int flag, const char *format, ...)
26{
27 /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
28 can only come from read-only format strings. */
29 unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0;
30 va_list ap;
31 int ret;
32
33 va_start (ap, format);
34 ret = __vasprintf_internal (result_ptr, format, ap, mode);
35 va_end (ap);
36
37 return ret;
38}
39#if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
40/* This is needed since <bits/stdio-lbdl.h> is included in this case, leading to
41 * multiple asm redirection of the same symbol
42 */
43ldbl_hidden_def (___asprintf_chk, __asprintf_chk)
44ldbl_strong_alias (___asprintf_chk, __asprintf_chk)
45#else
46/* On some systems introduction of ldbl_* macros lead to ABI breakage due to the
47 * long_double_symbol aliasing, e.g. on s390x:
48 * /usr/bin/ld: glibc/iconv/../libio/bits/stdio2.h:137: undefined reference to
49 * `__asprintf_chk'
50 * Due to __asprintf_chk@@GLIBC_2.4 alias replacing __asprintf_chk.
51 */
52strong_alias (___asprintf_chk, __asprintf_chk)
53libc_hidden_def (__asprintf_chk)
54#endif
55