48 lines
2.7 KiB
C
48 lines
2.7 KiB
C
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/*-*- 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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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/conv/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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