release/src/router/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 source tree.
   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 #include "libbb.h"
  14
  15 int FAST_FUNC bb_ask_confirmation(void)
  16 {
  17         char first = 0;
  18         int c;
  19
  20         while (((c = getchar()) != EOF) && (c != '\n')) {
  21                 if (first == 0 && !isblank(c)) {
  22                         first = c|0x20;
  23                 }
  24         }
  25
  26         return first == 'y';
  27 }