/* Checking snprintf.
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/* Checking snprintf.
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Copyright (C) 2005 Free Software Foundation, Inc.
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of GCC.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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Software Foundation; either version 2, or (at your option) any later
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version.
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version.
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In addition to the permissions in the GNU General Public License, the
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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the file, and distribution when not linked into a combine
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executable.)
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executable.)
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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02110-1301, USA. */
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/* As a special exception, if you link this library with files compiled with
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/* As a special exception, if you link this library with files compiled with
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GCC to produce an executable, this does not cause the resulting executable
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GCC to produce an executable, this does not cause the resulting executable
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to be covered by the GNU General Public License. This exception does not
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to be covered by the GNU General Public License. This exception does not
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however invalidate any other reasons why the executable file might be
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however invalidate any other reasons why the executable file might be
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covered by the GNU General Public License. */
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covered by the GNU General Public License. */
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#include "config.h"
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#include "config.h"
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#include <ssp/ssp.h>
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#include <ssp/ssp.h>
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#include <stdarg.h>
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#include <stdarg.h>
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#ifdef HAVE_STDIO_H
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#ifdef HAVE_STDIO_H
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# include <stdio.h>
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# include <stdio.h>
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#endif
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#endif
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extern void __chk_fail (void) __attribute__((__noreturn__));
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extern void __chk_fail (void) __attribute__((__noreturn__));
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#ifdef HAVE_USABLE_VSNPRINTF
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#ifdef HAVE_USABLE_VSNPRINTF
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int
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int
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__snprintf_chk (char *s, size_t n, int flags __attribute__((unused)),
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__snprintf_chk (char *s, size_t n, int flags __attribute__((unused)),
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size_t slen, const char *format, ...)
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size_t slen, const char *format, ...)
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{
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{
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va_list arg;
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va_list arg;
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int done;
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int done;
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if (n > slen)
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if (n > slen)
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__chk_fail ();
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__chk_fail ();
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va_start (arg, format);
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va_start (arg, format);
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done = vsnprintf (s, n, format, arg);
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done = vsnprintf (s, n, format, arg);
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va_end (arg);
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va_end (arg);
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return done;
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return done;
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}
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}
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#endif
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#endif
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