| /* Copyright (C) 1993, 1996, 1997 Free Software Foundation, Inc. |
| This file is part of the GNU IO Library. |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2, or (at |
| your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this library; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, Boston, |
| MA 02111-1307, USA. |
| |
| As a special exception, if you link this library with files |
| compiled with a GNU compiler to produce an executable, this does |
| not cause the resulting executable to be covered by the GNU General |
| Public License. This exception does not however invalidate any |
| other reasons why the executable file might be covered by the GNU |
| General Public License. */ |
| |
| #include "libioP.h" |
| #include <limits.h> |
| |
| char* |
| _IO_gets (buf) |
| char *buf; |
| { |
| _IO_size_t count; |
| int ch; |
| char *retval; |
| |
| _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, |
| _IO_stdin); |
| _IO_flockfile (_IO_stdin); |
| ch = _IO_getc_unlocked (_IO_stdin); |
| if (ch == EOF) |
| { |
| retval = NULL; |
| goto unlock_return; |
| } |
| if (ch == '\n') |
| count = 0; |
| else |
| { |
| buf[0] = (char) ch; |
| count = _IO_getline (_IO_stdin, buf + 1, INT_MAX, '\n', 0) + 1; |
| if (_IO_stdin->_IO_file_flags & _IO_ERR_SEEN) |
| { |
| retval = NULL; |
| goto unlock_return; |
| } |
| } |
| buf[count] = 0; |
| retval = buf; |
| unlock_return: |
| _IO_cleanup_region_end (1); |
| return retval; |
| } |
| |
| #ifdef weak_alias |
| weak_alias (_IO_gets, gets) |
| #endif |
| |
| #ifdef _LIBC |
| link_warning (gets, "the `gets' function is dangerous and should not be used.") |
| #endif |