47 lines
2.6 KiB
C
47 lines
2.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/safemacros.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/termios.h"
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#include "libc/fmt/conv.h"
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#include "libc/log/log.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/termios.h"
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/**
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* Returns dimensions of controlling terminal.
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*
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* It is recommended that programs err on the side of showing more
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* information, if this value can't be obtained with certainty.
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*
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* @param out stores determined dimensions, only on success
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* @returns -1 on error or something else on success
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*/
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int getttysize(int fd, struct winsize *out) {
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if (isterminalinarticulate()) {
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out->ws_col = strtoimax(firstnonnull(getenv("COLUMNS"), "80"), NULL, 0);
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out->ws_row = strtoimax(firstnonnull(getenv("ROWS"), "40"), NULL, 0);
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out->ws_xpixel = 0;
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out->ws_ypixel = 0;
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return 0;
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} else {
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return ioctl(fd, TIOCGWINSZ, out);
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}
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}
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