004cefa918
function old new delta packed_usage 34175 34233 +58 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini reset implementation for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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* Written by Erik Andersen and Kent Robotti <robotti@metconnect.com>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config RESET
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//config: bool "reset (345 bytes)"
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//config: default y
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//config: help
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//config: This program is used to reset the terminal screen, if it
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//config: gets messed up.
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//applet:IF_RESET(APPLET_NOEXEC(reset, reset, BB_DIR_USR_BIN, BB_SUID_DROP, reset))
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//kbuild:lib-$(CONFIG_RESET) += reset.o
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//usage:#define reset_trivial_usage
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//usage: ""
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//usage:#define reset_full_usage "\n\n"
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//usage: "Reset terminal (ESC codes) and termios (signals, buffering, echo)"
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/* "Standard" version of this tool is in ncurses package */
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#include "libbb.h"
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#define ESC "\033"
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#if ENABLE_STTY
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int stty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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#endif
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int reset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int reset_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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{
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static const char *const args[] = {
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"stty", "sane", NULL
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};
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/* no options, no getopt */
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if (/*isatty(STDIN_FILENO) &&*/ isatty(STDOUT_FILENO)) {
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/* See 'man 4 console_codes' for details:
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* "ESC c" -- Reset
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* "ESC ( B" -- Select G0 Character Set (B = US)
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* "ESC [ m" -- Reset all display attributes
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* "ESC [ J" -- Erase to the end of screen
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* "ESC [ ? 25 h" -- Make cursor visible
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*/
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printf(ESC"c" ESC"(B" ESC"[m" ESC"[J" ESC"[?25h");
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/* http://bugs.busybox.net/view.php?id=1414:
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* people want it to reset echo etc: */
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#if ENABLE_STTY
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return stty_main(2, (char**)args);
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#else
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/* Make sure stdout gets drained before we execvp */
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fflush_all();
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execvp("stty", (char**)args);
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#endif
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}
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return EXIT_SUCCESS;
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}
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