72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
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/* Copyright (C) 1993, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU IO Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2, or (at
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your option) any later version.
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This library is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this library; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA.
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As a special exception, if you link this library with files
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compiled with a GNU compiler to produce an executable, this does
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not cause the resulting executable to be covered by the GNU General
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Public License. This exception does not however invalidate any
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other reasons why the executable file might be covered by the GNU
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General Public License. */
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#include "libioP.h"
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#include <limits.h>
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char*
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_IO_gets (buf)
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char *buf;
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{
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_IO_size_t count;
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int ch;
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char *retval;
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_IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile,
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_IO_stdin);
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_IO_flockfile (_IO_stdin);
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ch = _IO_getc_unlocked (_IO_stdin);
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if (ch == EOF)
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{
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retval = NULL;
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goto unlock_return;
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}
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if (ch == '\n')
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count = 0;
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else
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{
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buf[0] = (char) ch;
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count = _IO_getline (_IO_stdin, buf + 1, INT_MAX, '\n', 0) + 1;
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if (_IO_stdin->_IO_file_flags & _IO_ERR_SEEN)
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{
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retval = NULL;
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goto unlock_return;
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}
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}
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buf[count] = 0;
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retval = buf;
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unlock_return:
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_IO_cleanup_region_end (1);
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return retval;
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}
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#ifdef weak_alias
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weak_alias (_IO_gets, gets)
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#endif
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#ifdef _LIBC
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link_warning (gets, "the `gets' function is dangerous and should not be used.")
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#endif
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