]>
Commit | Line | Data |
---|---|---|
dbfcb4be BK |
1 | /* Copyright (C) 1993, 1996, 1997 Free Software Foundation, Inc. |
2 | This file is part of the GNU IO Library. | |
3 | ||
4 | This library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU General Public License as | |
6 | published by the Free Software Foundation; either version 2, or (at | |
7 | your option) any later version. | |
8 | ||
9 | This library is distributed in the hope that it will be useful, but | |
10 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this library; see the file COPYING. If not, write to | |
16 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, | |
17 | MA 02111-1307, USA. | |
18 | ||
19 | As a special exception, if you link this library with files | |
20 | compiled with a GNU compiler to produce an executable, this does | |
21 | not cause the resulting executable to be covered by the GNU General | |
22 | Public License. This exception does not however invalidate any | |
23 | other reasons why the executable file might be covered by the GNU | |
24 | General Public License. */ | |
6599da04 JM |
25 | |
26 | #include "libioP.h" | |
27 | #include <limits.h> | |
28 | ||
29 | char* | |
dbfcb4be BK |
30 | _IO_gets (buf) |
31 | char *buf; | |
6599da04 JM |
32 | { |
33 | _IO_size_t count; | |
dbfcb4be BK |
34 | int ch; |
35 | char *retval; | |
36 | ||
37 | _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, | |
38 | _IO_stdin); | |
39 | _IO_flockfile (_IO_stdin); | |
40 | ch = _IO_getc_unlocked (_IO_stdin); | |
6599da04 | 41 | if (ch == EOF) |
dbfcb4be BK |
42 | { |
43 | retval = NULL; | |
44 | goto unlock_return; | |
45 | } | |
6599da04 JM |
46 | if (ch == '\n') |
47 | count = 0; | |
48 | else | |
49 | { | |
dbfcb4be BK |
50 | buf[0] = (char) ch; |
51 | count = _IO_getline (_IO_stdin, buf + 1, INT_MAX, '\n', 0) + 1; | |
6599da04 | 52 | if (_IO_stdin->_IO_file_flags & _IO_ERR_SEEN) |
dbfcb4be BK |
53 | { |
54 | retval = NULL; | |
55 | goto unlock_return; | |
56 | } | |
6599da04 JM |
57 | } |
58 | buf[count] = 0; | |
dbfcb4be BK |
59 | retval = buf; |
60 | unlock_return: | |
61 | _IO_cleanup_region_end (1); | |
62 | return retval; | |
6599da04 | 63 | } |
dbfcb4be BK |
64 | |
65 | #ifdef weak_alias | |
66 | weak_alias (_IO_gets, gets) | |
67 | #endif | |
68 | ||
69 | #ifdef _LIBC | |
70 | link_warning (gets, "the `gets' function is dangerous and should not be used.") | |
71 | #endif |