LXR busybox/coreutils/yes.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * yes 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/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
  10 *
  11 * Size reductions and removed redundant applet name prefix from error messages.
  12 */
  13//config:config YES
  14//config:       bool "yes (1.2 kb)"
  15//config:       default y
  16//config:       help
  17//config:       yes is used to repeatedly output a specific string, or
  18//config:       the default string 'y'.
  19
  20//applet:IF_YES(APPLET_NOEXEC(yes, yes, BB_DIR_USR_BIN, BB_SUID_DROP, yes))
  21/* was NOFORK, but then yes can't be ^C'ed if run by hush */
  22
  23//kbuild:lib-$(CONFIG_YES) += yes.o
  24
  25/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
  26
  27//usage:#define yes_trivial_usage
  28//usage:       "[STRING]"
  29//usage:#define yes_full_usage "\n\n"
  30//usage:       "Repeatedly output a line with STRING, or 'y'"
  31
  32#include "libbb.h"
  33
  34int yes_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  35int yes_main(int argc UNUSED_PARAM, char **argv)
  36{
  37        char **pp;
  38
  39        argv[0] = (char*)"y";
  40        if (argv[1])
  41                ++argv;
  42
  43        do {
  44                pp = argv;
  45                while (1) {
  46                        fputs(*pp, stdout);
  47                        if (!*++pp)
  48                                break;
  49                        putchar(' ');
  50                }
  51        } while (putchar('\n') != EOF);
  52
  53        bb_perror_nomsg_and_die();
  54}
  55