blob: d2d48d0a9acef985eb4845227ba5186f95da55a2
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 | |
20 | int ttysize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
21 | int 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 | } |
51 |