source: branches/3.2/mindi-busybox/miscutils/ttysize.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
  • Property svn:eol-style set to native
File size: 1.1 KB
Line 
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 GPLv2, see file LICENSE in this source tree.
11 */
12
13//usage:#define ttysize_trivial_usage
14//usage:       "[w] [h]"
15//usage:#define ttysize_full_usage "\n\n"
16//usage:       "Print dimension(s) of stdin's terminal, on error return 80x25"
17
18#include "libbb.h"
19
20int ttysize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
21int ttysize_main(int argc UNUSED_PARAM, char **argv)
22{
23    unsigned w, h;
24    struct winsize wsz;
25
26    w = 80;
27    h = 24;
28    if (!ioctl(0, TIOCGWINSZ, &wsz)) {
29        w = wsz.ws_col;
30        h = wsz.ws_row;
31    }
32
33    if (!argv[1]) {
34        printf("%u %u", w, h);
35    } else {
36        const char *fmt, *arg;
37
38        fmt = "%u %u" + 3; /* "%u" */
39        while ((arg = *++argv) != NULL) {
40            char c = arg[0];
41            if (c == 'w')
42                printf(fmt, w);
43            if (c == 'h')
44                printf(fmt, h);
45            fmt = "%u %u" + 2; /* " %u" */
46        }
47    }
48    bb_putchar('\n');
49    return 0;
50}
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