66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Replacement for "stty size", which is awkward for shell script use.
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* - Allows to request width, height, or both, in any order.
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* - Does not complain on error, but returns width 80, height 24.
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* - Size: less than 200 bytes
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*
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* Copyright (C) 2007 by Denys Vlasenko <vda.linux@googlemail.com>
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//config:config TTYSIZE
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//config: bool "ttysize (432 bytes)"
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//config: default y
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//config: help
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//config: A replacement for "stty size". Unlike stty, can report only width,
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//config: only height, or both, in any order. It also does not complain on
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//config: error, but returns default 80x24.
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//config: Usage in shell scripts: width=`ttysize w`.
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//applet:IF_TTYSIZE(APPLET_NOFORK(ttysize, ttysize, BB_DIR_USR_BIN, BB_SUID_DROP, ttysize))
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//kbuild:lib-$(CONFIG_TTYSIZE) += ttysize.o
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//usage:#define ttysize_trivial_usage
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//usage: "[w] [h]"
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//usage:#define ttysize_full_usage "\n\n"
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//usage: "Print dimensions of stdin tty, or 80x24"
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#include "libbb.h"
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int ttysize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int ttysize_main(int argc UNUSED_PARAM, char **argv)
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{
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unsigned w, h;
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struct winsize wsz;
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w = 80;
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h = 24;
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if (ioctl(0, TIOCGWINSZ, &wsz) == 0
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|| ioctl(1, TIOCGWINSZ, &wsz) == 0
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|| ioctl(2, TIOCGWINSZ, &wsz) == 0
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) {
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w = wsz.ws_col;
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h = wsz.ws_row;
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}
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if (!argv[1]) {
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printf("%u %u", w, h);
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} else {
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const char *fmt, *arg;
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fmt = "%u %u" + 3; /* "%u" */
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while ((arg = *++argv) != NULL) {
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char c = arg[0];
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if (c == 'w')
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printf(fmt, w);
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if (c == 'h')
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printf(fmt, h);
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fmt = "%u %u" + 2; /* " %u" */
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}
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}
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bb_putchar('\n');
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return 0;
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}
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