external/gpl2/xcvs/dist/lib/yesno.c

   1 /* yesno.c -- read a yes/no response from stdin
   2
   3    Copyright (C) 1990, 1998, 2001, 2003, 2004, 2005 Free Software
   4    Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software Foundation,
  18    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #include "yesno.h"
  25
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28
  29 #include "getline.h"
  30
  31 /* Return true if we read an affirmative line from standard input.  */
  32
  33 extern int rpmatch (char const *response);
  34
  35 bool
  36 yesno (void)
  37 {
  38   char *response = NULL;
  39   size_t response_size = 0;
  40   ssize_t response_len = getline (&response, &response_size, stdin);
  41   bool yes;
  42
  43   if (response_len <= 0)
  44     yes = false;
  45   else
  46     {
  47       response[response_len - 1] = '\0';
  48       yes = (0 < rpmatch (response));
  49     }
  50
  51   free (response);
  52   return yes;
  53 }