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/* vi: set sw=4 ts=4: */
/*
* Replacement for "stty size", which is awkward for shell script use.
* - Allows to request width, height, or both, in any order.
* - Does not complain on error, but returns width 80, height 24.
* - Size: less than 200 bytes
*
* Copyright (C) 2007 by Denys Vlasenko <vda.linux@googlemail.com>
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
//config:config TTYSIZE
//config: bool "ttysize (718 bytes)"
//config: default y
//config: help
//config: A replacement for "stty size". Unlike stty, can report only width,
//config: only height, or both, in any order. It also does not complain on
//config: error, but returns default 80x24.
//config: Usage in shell scripts: width=`ttysize w`.
//applet:IF_TTYSIZE(APPLET_NOFORK(ttysize, ttysize, BB_DIR_USR_BIN, BB_SUID_DROP, ttysize))
//kbuild:lib-$(CONFIG_TTYSIZE) += ttysize.o
//usage:#define ttysize_trivial_usage
//usage: "[w] [h]"
//usage:#define ttysize_full_usage "\n\n"
//usage: "Print dimensions of stdin tty, or 80x24"
#include "libbb.h"
int ttysize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int ttysize_main(int argc UNUSED_PARAM, char **argv)
{
unsigned w, h;
struct winsize wsz;
w = 80;
h = 24;
if (ioctl(0, TIOCGWINSZ, &wsz) == 0
|| ioctl(1, TIOCGWINSZ, &wsz) == 0
|| ioctl(2, TIOCGWINSZ, &wsz) == 0
) {
w = wsz.ws_col;
h = wsz.ws_row;
}
if (!argv[1]) {
printf("%u %u", w, h);
} else {
const char *fmt, *arg;
fmt = "%u %u" + 3; /* "%u" */
while ((arg = *++argv) != NULL) {
char c = arg[0];
if (c == 'w')
printf(fmt, w);
if (c == 'h')
printf(fmt, h);
fmt = "%u %u" + 2; /* " %u" */
}
}
bb_putchar('\n');
return 0;
}
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