| /* yesno.c -- read a yes/no response from stdin |
| |
| Copyright (C) 1990, 1998, 2001, 2003-2020 Free Software Foundation, Inc. |
| |
| This program 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 3 of the License, or |
| (at your option) any later version. |
| |
| This program 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 program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| #include <config.h> |
| |
| #include "yesno.h" |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| |
| /* Return true if we read an affirmative line from standard input. |
| |
| Since this function uses stdin, it is suggested that the caller not |
| use STDIN_FILENO directly, and also that the line |
| atexit(close_stdin) be added to main(). */ |
| |
| bool |
| yesno (void) |
| { |
| bool yes; |
| |
| #if ENABLE_NLS |
| char *response = NULL; |
| size_t response_size = 0; |
| ssize_t response_len = getline (&response, &response_size, stdin); |
| |
| if (response_len <= 0) |
| yes = false; |
| else |
| { |
| /* Remove EOL if present as that's not part of the matched response, |
| and not matched by $ for example. */ |
| if (response[response_len - 1] == '\n') |
| response[response_len - 1] = '\0'; |
| yes = (0 < rpmatch (response)); |
| } |
| |
| free (response); |
| #else |
| /* Test against "^[yY]", hardcoded to avoid requiring getline, |
| regex, and rpmatch. */ |
| int c = getchar (); |
| yes = (c == 'y' || c == 'Y'); |
| while (c != '\n' && c != EOF) |
| c = getchar (); |
| #endif |
| |
| return yes; |
| } |