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
73 lines
3.5 KiB
C
73 lines
3.5 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/calls/cp.internal.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/fd.internal.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/calls/termios.h"
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#include "libc/dce.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/nt/files.h"
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#include "libc/sysv/consts/termios.h"
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#include "libc/sysv/errfuns.h"
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#define TCSBRK 0x5409 // linux
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#define TIOCDRAIN 0x2000745e // xnu, freebsd, openbsd, netbsd
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static dontinline textwindows int sys_tcdrain_nt(int fd) {
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if (!__isfdopen(fd)) return ebadf();
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if (_check_interrupts(0)) return -1;
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// Tried FlushFileBuffers but it made Emacs hang when run in cmd.exe
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// "Console output is not buffered." -Quoth MSDN on FlushFileBuffers
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return 0;
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}
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/**
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* Waits until all written output is transmitted.
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*
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* @param fd is file descriptor of tty
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* @raise EBADF if `fd` isn't an open file descriptor
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* @raise ENOTTY if `fd` is open but not a teletypewriter
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* @raise EIO if process group of writer is orphaned, calling thread is
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* not blocking `SIGTTOU`, and process isn't ignoring `SIGTTOU`
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* @raise ECANCELED if thread was cancelled in masked mode
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* @raise EINTR if signal was delivered
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* @raise ENOSYS on bare metal
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* @cancellationpoint
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* @asyncsignalsafe
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*/
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int tcdrain(int fd) {
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int rc;
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BEGIN_CANCELLATION_POINT;
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if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
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rc = enotty();
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} else if (IsLinux()) {
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rc = sys_ioctl_cp(fd, TCSBRK, (uintptr_t)1);
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} else if (IsBsd()) {
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rc = sys_ioctl_cp(fd, TIOCDRAIN, 0);
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} else if (IsWindows()) {
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rc = sys_tcdrain_nt(fd);
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} else {
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rc = enosys();
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}
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END_CANCELLATION_POINT;
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STRACE("tcdrain(%d) → %d% m", fd, rc);
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return rc;
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}
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