Mercurial > gnulib
view lib/yesno.c @ 40086:d6de7c427079
stdopen: modernize and simplify
* lib/stdopen.c: Update copyright date
Do not include sys/types.h; no longer needed these days.
(stdopen): Use C99-style decl in loop. Return int errno
value, rather than just a bool. Do not worry about fd mismatches,
since the caller cares only if 0, 1, 2 are occupied.
* lib/stdopen.h: No need to include <stdbool.h>.
* m4/stdopen.m4: Remove.
* modules/stdopen: New file.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Sat, 05 Jan 2019 18:02:32 -0800 |
parents | b06060465f09 |
children |
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/* yesno.c -- read a yes/no response from stdin Copyright (C) 1990, 1998, 2001, 2003-2019 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; }