| 1 | /* Copyright (C) 1991-2024 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <stdarg.h> |
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| 19 | #include <libio/libioP.h> |
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| 20 | |
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| 21 | |
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| 22 | /* Write formatted output from FORMAT to a string which is |
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| 23 | allocated with malloc and stored in *STRING_PTR. */ |
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| 24 | int |
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| 25 | ___asprintf_chk (char **result_ptr, int flag, const char *format, ...) |
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| 26 | { |
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| 27 | /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n |
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| 28 | can only come from read-only format strings. */ |
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| 29 | unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0; |
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| 30 | va_list ap; |
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| 31 | int ret; |
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| 32 | |
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| 33 | va_start (ap, format); |
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| 34 | ret = __vasprintf_internal (result_ptr, format, ap, mode_flags: mode); |
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| 35 | va_end (ap); |
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| 36 | |
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| 37 | return ret; |
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| 38 | } |
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| 39 | #if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1 |
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| 40 | /* This is needed since <bits/stdio-lbdl.h> is included in this case, leading to |
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| 41 | * multiple asm redirection of the same symbol |
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| 42 | */ |
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| 43 | ldbl_hidden_def (___asprintf_chk, __asprintf_chk) |
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| 44 | ldbl_strong_alias (___asprintf_chk, __asprintf_chk) |
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| 45 | #else |
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| 46 | /* On some systems introduction of ldbl_* macros lead to ABI breakage due to the |
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| 47 | * long_double_symbol aliasing, e.g. on s390x: |
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| 48 | * /usr/bin/ld: glibc/iconv/../libio/bits/stdio2.h:137: undefined reference to |
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| 49 | * `__asprintf_chk' |
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| 50 | * Due to __asprintf_chk@@GLIBC_2.4 alias replacing __asprintf_chk. |
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| 51 | */ |
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| 52 | strong_alias (___asprintf_chk, __asprintf_chk) |
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| 53 | libc_hidden_def (__asprintf_chk) |
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| 54 | #endif |
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| 55 | |
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