Line data    Source code

       1             : /* yesno.c -- read a yes/no response from stdin
       2             : 
       3             :    Copyright (C) 1990, 1998, 2001, 2003, 2004, 2005, 2006, 2007 Free
       4             :    Software 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 3 of the License, or
       9             :    (at your option) 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, see <http://www.gnu.org/licenses/>.  */
      18             : 
      19             : #include <config.h>
      20             : 
      21             : #include "yesno.h"
      22             : 
      23             : #include <stdlib.h>
      24             : #include <stdio.h>
      25             : 
      26             : extern int rpmatch (char const *response);
      27             : 
      28             : /* Return true if we read an affirmative line from standard input.
      29             : 
      30             :    Since this function uses stdin, it is suggested that the caller not
      31             :    use STDIN_FILENO directly, and also that the line
      32             :    atexit(close_stdin) be added to main().  */
      33             : 
      34             : bool
      35          13 : yesno (void)
      36             : {
      37             :   bool yes;
      38             : 
      39             : #if ENABLE_NLS
      40             :   char *response = NULL;
      41             :   size_t response_size = 0;
      42             :   ssize_t response_len = getline (&response, &response_size, stdin);
      43             : 
      44             :   if (response_len <= 0)
      45             :     yes = false;
      46             :   else
      47             :     {
      48             :       response[response_len - 1] = '\0';
      49             :       yes = (0 < rpmatch (response));
      50             :     }
      51             : 
      52             :   free (response);
      53             : #else
      54             :   /* Test against "^[yY]", hardcoded to avoid requiring getline,
      55             :      regex, and rpmatch.  */
      56          13 :   int c = getchar ();
      57          13 :   yes = (c == 'y' || c == 'Y');
      58          36 :   while (c != '\n' && c != EOF)
      59          10 :     c = getchar ();
      60             : #endif
      61             : 
      62          13 :   return yes;
      63             : }