mirror of
https://github.com/jart/cosmopolitan.git
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965516e313
- Get SIGWINCH working again on the New Technology - Correctly handle O_NOFOLLOW in open() on Windows - Implement synthetic umask() functionality on Windows - Do a better job managing file execute access on Windows - Fill in `st_uid` and `st_gid` with username hash on Windows - Munge UNICODE control pictures into control codes on Windows - Do a better job ensuring Windows console settings are restored - Introduce KPRINTF_LOG environment variable to log kprintf to a file
72 lines
3.4 KiB
C
72 lines
3.4 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 2021 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/atomic.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/sig.internal.h"
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#include "libc/calls/struct/fd.internal.h"
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#include "libc/calls/struct/winsize.h"
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#include "libc/calls/struct/winsize.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/atomic.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/nt/console.h"
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#include "libc/nt/struct/consolescreenbufferinfoex.h"
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#include "libc/sysv/consts/sicode.h"
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#include "libc/sysv/consts/sig.h"
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#ifdef __x86_64__
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static atomic_uint __win_winsize;
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static textwindows unsigned __get_console_size(void) {
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for (int fd = 1; fd < 10; ++fd) {
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intptr_t hConsoleOutput;
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if (g_fds.p[fd].kind == kFdConsole) {
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hConsoleOutput = g_fds.p[fd].extra;
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} else {
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hConsoleOutput = g_fds.p[fd].handle;
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}
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struct NtConsoleScreenBufferInfoEx sr = {.cbSize = sizeof(sr)};
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if (GetConsoleScreenBufferInfoEx(hConsoleOutput, &sr)) {
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unsigned short yn = sr.srWindow.Bottom - sr.srWindow.Top + 1;
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unsigned short xn = sr.srWindow.Right - sr.srWindow.Left + 1;
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return (unsigned)yn << 16 | xn;
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}
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}
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return -1u;
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}
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textwindows void _check_sigwinch(void) {
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unsigned old = atomic_load_explicit(&__win_winsize, memory_order_acquire);
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if (old == -1u) return;
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unsigned neu = __get_console_size();
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old = atomic_exchange(&__win_winsize, neu);
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if (neu != old) {
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__sig_add(0, SIGWINCH, SI_KERNEL);
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}
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}
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__attribute__((__constructor__)) static void sigwinch_init(void) {
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if (!IsWindows()) return;
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unsigned ws = __get_console_size();
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atomic_store_explicit(&__win_winsize, ws, memory_order_release);
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STRACE("sigwinch_init() → %08x", ws);
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}
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#endif /* __x86_64__ */
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