source: src/router/busybox/miscutils/ttysize.c @ 8864

/* 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, 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 (argc == 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;
}