busybox/miscutils/ttysize.c

/* 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 the GPL v2, see the file LICENSE in this tarball.
 */
#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)) {
		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;
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* Replacement for "stty size", which is awkward for shell script use.
4	* - Allows to request width, height, or both, in any order.
5	* - Does not complain on error, but returns width 80, height 24.
6	* - Size: less than 200 bytes
7	*
8	* Copyright (C) 2007 by Denys Vlasenko <vda.linux@googlemail.com>
9	*
10	* Licensed under the GPL v2, see the file LICENSE in this tarball.
11	*/
12	#include "libbb.h"
13
14	int ttysize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
15	int ttysize_main(int argc UNUSED_PARAM, char **argv)
16	{
17	unsigned w, h;
18	struct winsize wsz;
19
20	w = 80;
21	h = 24;
22	if (!ioctl(0, TIOCGWINSZ, &wsz)) {
23	w = wsz.ws_col;
24	h = wsz.ws_row;
25	}
26
27	if (!argv[1]) {
28	printf("%u %u", w, h);
29	} else {
30	const char fmt, arg;
31
32	fmt = "%u %u" + 3; /* "%u" */
33	while ((arg = *++argv) != NULL) {
34	char c = arg[0];
35	if (c == 'w')
36	printf(fmt, w);
37	if (c == 'h')
38	printf(fmt, h);
39	fmt = "%u %u" + 2; /* " %u" */
40	}
41	}
42	bb_putchar('\n');
43	return 0;
44	}