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*: use _exit() in sighandlers; showkey: do not use exit-thru-sighandler

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While at it, make ESC sequences more readable; and removed check for
isatty(stdin) in reset. Code shrink:

   text    data     bss     dec     hex filename
 884771     936   17216  902923   dc70b busybox_old
 884723     936   17216  902875   dc6db busybox_unstripped

Signed-off-by: Marek Polacek <mmpolacek@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Marek Polacek
2010-10-28 21:34:56 +02:00
committed by Denys Vlasenko
parent 02788ac7e2
commit 7b18107384
8 changed files with 78 additions and 72 deletions
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12
console-tools/reset.c
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@ -8,11 +8,13 @@
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
/* BTW, which "standard" package has this utility? It doesn't seem
* to be ncurses, coreutils, console-tools... then what? */
#include "libbb.h"
#define ESC "\033"
#if ENABLE_STTY
int stty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
#endif
@ -26,15 +28,15 @@ int reset_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
/* no options, no getopt */
if (isatty(STDIN_FILENO) && isatty(STDOUT_FILENO)) {
if (/*isatty(STDIN_FILENO) &&*/ isatty(STDOUT_FILENO)) {
/* See 'man 4 console_codes' for details:
* "ESC c" -- Reset
* "ESC ( K" -- Select user mapping
* "ESC [ J" -- Erase to the end of screen
* "ESC [ 0 m" -- Reset all display attributes
* "ESC [ J" -- Erase to the end of screen
* "ESC [ ? 25 h" -- Make cursor visible
*/
printf("\033c\033(K\033[J\033[0m\033[?25h");
printf(ESC"c" ESC"(K" ESC"[0m" ESC"[J" ESC"[?25h");
/* http://bugs.busybox.net/view.php?id=1414:
* people want it to reset echo etc: */
#if ENABLE_STTY