1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/* 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;
}
|
