release/src/router/busybox/coreutils/usleep.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * usleep 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 /* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
  11
  12 //usage:#define usleep_trivial_usage
  13 //usage:       "N"
  14 //usage:#define usleep_full_usage "\n\n"
  15 //usage:       "Pause for N microseconds"
  16 //usage:
  17 //usage:#define usleep_example_usage
  18 //usage:       "$ usleep 1000000\n"
  19 //usage:       "[pauses for 1 second]\n"
  20
  21 #include "libbb.h"
  22
  23 /* This is a NOFORK applet. Be very careful! */
  24
  25 int usleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  26 int usleep_main(int argc UNUSED_PARAM, char **argv)
  27 {
  28         if (!argv[1]) {
  29                 bb_show_usage();
  30         }
  31
  32         usleep(xatou(argv[1]));
  33
  34         return EXIT_SUCCESS;
  35 }