1 /* yesno.c -- read a yes/no response from stdin
3 Copyright (C) 1990, 1998, 2001, 2003-2018 Free Software Foundation, Inc.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
25 /* Return true if we read an affirmative line from standard input.
27 Since this function uses stdin, it is suggested that the caller not
28 use STDIN_FILENO directly, and also that the line
29 atexit(close_stdin) be added to main(). */
37 char *response
= NULL
;
38 size_t response_size
= 0;
39 ssize_t response_len
= getline (&response
, &response_size
, stdin
);
41 if (response_len
<= 0)
45 /* Remove EOL if present as that's not part of the matched response,
46 and not matched by $ for example. */
47 if (response
[response_len
- 1] == '\n')
48 response
[response_len
- 1] = '\0';
49 yes
= (0 < rpmatch (response
));
54 /* Test against "^[yY]", hardcoded to avoid requiring getline,
55 regex, and rpmatch. */
57 yes
= (c
== 'y' || c
== 'Y');
58 while (c
!= '\n' && c
!= EOF
)