64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/* yesno.c -- read a yes/no response from stdin
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Copyright (C) 1990, 1998, 2001, 2003-2020 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU 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 program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include "yesno.h"
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#include <stdlib.h>
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#include <stdio.h>
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/* Return true if we read an affirmative line from standard input.
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Since this function uses stdin, it is suggested that the caller not
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use STDIN_FILENO directly, and also that the line
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atexit(close_stdin) be added to main(). */
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bool
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yesno (void)
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{
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bool yes;
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#if ENABLE_NLS
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char *response = NULL;
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size_t response_size = 0;
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ssize_t response_len = getline (&response, &response_size, stdin);
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if (response_len <= 0)
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yes = false;
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else
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{
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/* Remove EOL if present as that's not part of the matched response,
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and not matched by $ for example. */
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if (response[response_len - 1] == '\n')
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response[response_len - 1] = '\0';
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yes = (0 < rpmatch (response));
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}
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free (response);
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#else
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/* Test against "^[yY]", hardcoded to avoid requiring getline,
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regex, and rpmatch. */
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int c = getchar ();
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yes = (c == 'y' || c == 'Y');
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while (c != '\n' && c != EOF)
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c = getchar ();
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#endif
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return yes;
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}
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