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/* vi: set sw=4 ts=4: */
/*
* Mini reset implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Written by Erik Andersen and Kent Robotti <robotti@metconnect.com>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config RESET
//config: bool "reset (345 bytes)"
//config: default y
//config: help
//config: This program is used to reset the terminal screen, if it
//config: gets messed up.
// NOTE: For WIN32 this applet is NOFORK so we can change the screen
// buffer for the current process.
//applet:IF_RESET(APPLET_NOFORK(reset, reset, BB_DIR_USR_BIN, BB_SUID_DROP, reset))
//kbuild:lib-$(CONFIG_RESET) += reset.o
//usage:#define reset_trivial_usage
//usage: ""
//usage:#define reset_full_usage "\n\n"
//usage: "Reset the screen"
/* "Standard" version of this tool is in ncurses package */
#include "libbb.h"
#define ESC "\033"
#if ENABLE_STTY
int stty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
#endif
int reset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int reset_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
#if !ENABLE_PLATFORM_MINGW32
static const char *const args[] = {
"stty", "sane", NULL
};
/* no options, no getopt */
if (/*isatty(STDIN_FILENO) &&*/ isatty(STDOUT_FILENO)) {
/* See 'man 4 console_codes' for details:
* "ESC c" -- Reset
* "ESC ( B" -- Select G0 Character Set (B = US)
* "ESC [ m" -- Reset all display attributes
* "ESC [ J" -- Erase to the end of screen
* "ESC [ ? 25 h" -- Make cursor visible
*/
printf(ESC"c" ESC"(B" ESC"[m" ESC"[J" ESC"[?25h");
/* http://bugs.busybox.net/view.php?id=1414:
* people want it to reset echo etc: */
#if ENABLE_STTY
return stty_main(2, (char**)args);
#else
/* Make sure stdout gets drained before we execvp */
fflush_all();
execvp("stty", (char**)args);
#endif
}
#else
if (isatty(STDOUT_FILENO)) {
// "ESC [ m" -- Reset all display attributes
// "ESC [ ? 1049 l" -- Use normal screen buffer
// reset_screen -- Reset cursor and clear screen buffer
full_write1_str(ESC"[m" ESC"[?1049l");
reset_screen();
}
#endif
return EXIT_SUCCESS;
}
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