blob: 7bc30c2a2951bbb92f4625d4b6fef88fc1c60e4b
| 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 | //config:config USLEEP |
| 10 | //config: bool "usleep" |
| 11 | //config: default y |
| 12 | //config: help |
| 13 | //config: usleep is used to pause for a specified number of microseconds. |
| 14 | |
| 15 | //applet:IF_USLEEP(APPLET_NOFORK(usleep, usleep, BB_DIR_BIN, BB_SUID_DROP, usleep)) |
| 16 | |
| 17 | //kbuild:lib-$(CONFIG_USLEEP) += usleep.o |
| 18 | |
| 19 | /* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */ |
| 20 | |
| 21 | //usage:#define usleep_trivial_usage |
| 22 | //usage: "N" |
| 23 | //usage:#define usleep_full_usage "\n\n" |
| 24 | //usage: "Pause for N microseconds" |
| 25 | //usage: |
| 26 | //usage:#define usleep_example_usage |
| 27 | //usage: "$ usleep 1000000\n" |
| 28 | //usage: "[pauses for 1 second]\n" |
| 29 | |
| 30 | #include "libbb.h" |
| 31 | |
| 32 | /* This is a NOFORK applet. Be very careful! */ |
| 33 | |
| 34 | int usleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 35 | int usleep_main(int argc UNUSED_PARAM, char **argv) |
| 36 | { |
| 37 | if (!argv[1]) { |
| 38 | bb_show_usage(); |
| 39 | } |
| 40 | |
| 41 | usleep(xatou(argv[1])); |
| 42 | |
| 43 | return EXIT_SUCCESS; |
| 44 | } |
| 45 |