1 /* vi: set sw=4 ts=4: */
2 /*
3 * Mini reset implementation for busybox
4 *
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 * Written by Erik Andersen and Kent Robotti <robotti@metconnect.com>
7 *
8 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
9 */
10 //config:config RESET
11 //config: bool "reset (345 bytes)"
12 //config: default y
13 //config: help
14 //config: This program is used to reset the terminal screen, if it
15 //config: gets messed up.
16
17 //applet:IF_RESET(APPLET_NOEXEC(reset, reset, BB_DIR_USR_BIN, BB_SUID_DROP, reset))
18
19 //kbuild:lib-$(CONFIG_RESET) += reset.o
20
21 //usage:#define reset_trivial_usage
22 //usage: ""
23 //usage:#define reset_full_usage "\n\n"
24 //usage: "Reset the screen"
25
26 /* "Standard" version of this tool is in ncurses package */
27
28 #include "libbb.h"
29
30 #define ESC "\033"
31
32 #if ENABLE_STTY
33 int stty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
34 #endif
35
36 int reset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
reset_main(int argc UNUSED_PARAM,char ** argv UNUSED_PARAM)37 int reset_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
38 {
39 static const char *const args[] = {
40 "stty", "sane", NULL
41 };
42
43 /* no options, no getopt */
44
45 if (/*isatty(STDIN_FILENO) &&*/ isatty(STDOUT_FILENO)) {
46 /* See 'man 4 console_codes' for details:
47 * "ESC c" -- Reset
48 * "ESC ( B" -- Select G0 Character Set (B = US)
49 * "ESC [ m" -- Reset all display attributes
50 * "ESC [ J" -- Erase to the end of screen
51 * "ESC [ ? 25 h" -- Make cursor visible
52 */
53 printf(ESC"c" ESC"(B" ESC"[m" ESC"[J" ESC"[?25h");
54 /* http://bugs.busybox.net/view.php?id=1414:
55 * people want it to reset echo etc: */
56 #if ENABLE_STTY
57 return stty_main(2, (char**)args);
58 #else
59 /* Make sure stdout gets drained before we execvp */
60 fflush_all();
61 execvp("stty", (char**)args);
62 #endif
63 }
64 return EXIT_SUCCESS;
65 }
66