LXR busybox/libbb/ask_confirmation.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * bb_ask_confirmation implementation for busybox
   4 *
   5 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
   6 *
   7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
   8 */
   9
  10/* Read a line from stdin.  If the first non-whitespace char is 'y' or 'Y',
  11 * return 1.  Otherwise return 0.
  12 */
  13
  14#include "libbb.h"
  15
  16int FAST_FUNC bb_ask_confirmation(void)
  17{
  18        int retval = 0;
  19        int first = 1;
  20        int c;
  21
  22        while (((c = getchar()) != EOF) && (c != '\n')) {
  23                /* Make sure we get the actual function call for isspace,
  24                 * as speed is not critical here. */
  25                if (first && !(isspace)(c)) {
  26                        --first;
  27                        if ((c == 'y') || (c == 'Y')) {
  28                                ++retval;
  29                        }
  30                }
  31        }
  32
  33        return retval;
  34}
  35