blob: 135ce853524389f6cbc63c9e886071f66002e50a
| 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 | //config:config TTYSIZE |
| 13 | //config: bool "ttysize" |
| 14 | //config: default y |
| 15 | //config: help |
| 16 | //config: A replacement for "stty size". Unlike stty, can report only width, |
| 17 | //config: only height, or both, in any order. It also does not complain on |
| 18 | //config: error, but returns default 80x24. |
| 19 | //config: Usage in shell scripts: width=`ttysize w`. |
| 20 | |
| 21 | //applet:IF_TTYSIZE(APPLET(ttysize, BB_DIR_USR_BIN, BB_SUID_DROP)) |
| 22 | |
| 23 | //kbuild:lib-$(CONFIG_TTYSIZE) += ttysize.o |
| 24 | |
| 25 | //usage:#define ttysize_trivial_usage |
| 26 | //usage: "[w] [h]" |
| 27 | //usage:#define ttysize_full_usage "\n\n" |
| 28 | //usage: "Print dimension(s) of stdin's terminal, on error return 80x25" |
| 29 | |
| 30 | #include "libbb.h" |
| 31 | |
| 32 | int ttysize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 33 | int ttysize_main(int argc UNUSED_PARAM, char **argv) |
| 34 | { |
| 35 | unsigned w, h; |
| 36 | struct winsize wsz; |
| 37 | |
| 38 | w = 80; |
| 39 | h = 24; |
| 40 | if (!ioctl(0, TIOCGWINSZ, &wsz)) { |
| 41 | w = wsz.ws_col; |
| 42 | h = wsz.ws_row; |
| 43 | } |
| 44 | |
| 45 | if (!argv[1]) { |
| 46 | printf("%u %u", w, h); |
| 47 | } else { |
| 48 | const char *fmt, *arg; |
| 49 | |
| 50 | fmt = "%u %u" + 3; /* "%u" */ |
| 51 | while ((arg = *++argv) != NULL) { |
| 52 | char c = arg[0]; |
| 53 | if (c == 'w') |
| 54 | printf(fmt, w); |
| 55 | if (c == 'h') |
| 56 | printf(fmt, h); |
| 57 | fmt = "%u %u" + 2; /* " %u" */ |
| 58 | } |
| 59 | } |
| 60 | bb_putchar('\n'); |
| 61 | return 0; |
| 62 | } |
| 63 |