39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
/* Copyright (C) 1994-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <libio/libioP.h>
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int
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___vsprintf_chk (char *s, int flag, size_t slen, const char *format,
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va_list ap)
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{
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/* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
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can only come from read-only format strings. */
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unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0;
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/* Regardless of the value of flag, let __vsprintf_internal know that
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this is a call from *printf_chk. */
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mode |= PRINTF_CHK;
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if (slen == 0)
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__chk_fail ();
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return __vsprintf_internal (s, slen, format, ap, mode);
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}
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ldbl_hidden_def (___vsprintf_chk, __vsprintf_chk)
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ldbl_strong_alias (___vsprintf_chk, __vsprintf_chk)
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