libbb/ask_confirmation.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * bb_ask_y_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 #include "libbb.h"
  10
  11 /* Read a line from fp.  If the first non-whitespace char is 'y' or 'Y',
  12  * return 1.  Otherwise return 0.
  13  */
  14 int FAST_FUNC bb_ask_y_confirmation_FILE(FILE *fp)
  15 {
  16         char first = 0;
  17         int c;
  18
  19         fflush_all();
  20         while (((c = fgetc(fp)) != EOF) && (c != '\n')) {
  21                 if (first == 0 && !isblank(c)) {
  22                         first = c|0x20;
  23                 }
  24         }
  25
  26         return first == 'y';
  27 }
  28
  29 int FAST_FUNC bb_ask_y_confirmation(void)
  30 {
  31         return bb_ask_y_confirmation_FILE(stdin);
  32 }