mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
33d280c8ba
- Blocking read operations on the Windows Console can now EINTR - Blocking read operations on Windows pipes now EINTR more reliably - setitimer() will no longer be inherited across fork() on Windows - It's now possible to use ECHO when the console is in raw mode - The ECHOCTL flag now works correctly on the Windows Console - The ICRNL flag now works correctly on the Windows Console - pread() and pwrite() will now raise ESPIPE on Windows - Opening /dev/tty on Windows is improved (untested) - Overlapped I/O is now implemented in a better way
113 lines
4.9 KiB
C
113 lines
4.9 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/assert.h"
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#include "libc/calls/calls.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/iovec.internal.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/errno.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/intrin/weaken.h"
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#include "libc/macros.internal.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/files.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/struct/overlapped.h"
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#include "libc/runtime/runtime.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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#include "libc/sysv/errfuns.h"
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static textwindows ssize_t sys_write_nt_impl(int fd, void *data, size_t size,
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ssize_t offset) {
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// perform the write i/o operation
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bool32 ok;
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uint32_t sent;
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int64_t handle;
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if (g_fds.p[fd].kind == kFdConsole) {
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handle = g_fds.p[fd].extra; // get write end of console
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} else {
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handle = g_fds.p[fd].handle;
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}
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size = MIN(size, 0x7ffff000);
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if (offset == -1) {
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// perform simple blocking write
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ok = WriteFile(handle, data, size, &sent, 0);
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} else {
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// perform pwrite()-style write at particular file offset
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int64_t position;
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// save file pointer which windows clobbers, even for overlapped i/o
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if (!SetFilePointerEx(handle, 0, &position, SEEK_CUR)) {
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return __winerr(); // fd probably isn't seekable?
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}
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struct NtOverlapped overlap = {0};
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overlap.Pointer = (void *)(uintptr_t)offset;
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ok = WriteFile(handle, data, size, 0, &overlap);
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if (!ok && GetLastError() == kNtErrorIoPending) ok = true;
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if (ok) ok = GetOverlappedResult(handle, &overlap, &sent, true);
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// restore file pointer which windows clobbers, even on error
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unassert(SetFilePointerEx(handle, position, 0, SEEK_SET));
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}
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if (ok) {
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return sent;
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}
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switch (GetLastError()) {
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// case kNtErrorInvalidHandle:
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// return ebadf(); /* handled by consts.sh */
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// case kNtErrorNotEnoughQuota:
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// return edquot(); /* handled by consts.sh */
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case kNtErrorBrokenPipe: // broken pipe
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case kNtErrorNoData: // closing named pipe
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if (_weaken(__sig_raise)) {
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_weaken(__sig_raise)(SIGPIPE, SI_KERNEL);
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return epipe();
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} else {
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STRACE("broken pipe");
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ExitProcess(EPIPE);
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}
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case kNtErrorAccessDenied: // write doesn't return EACCESS
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return ebadf();
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default:
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return __winerr();
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}
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}
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textwindows ssize_t sys_write_nt(int fd, const struct iovec *iov, size_t iovlen,
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ssize_t opt_offset) {
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ssize_t rc;
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size_t i, total;
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if (opt_offset < -1) return einval();
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while (iovlen && !iov[0].iov_len) iov++, iovlen--;
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if (iovlen) {
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for (total = i = 0; i < iovlen; ++i) {
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if (!iov[i].iov_len) continue;
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rc = sys_write_nt_impl(fd, iov[i].iov_base, iov[i].iov_len, opt_offset);
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if (rc == -1) return -1;
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total += rc;
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if (opt_offset != -1) opt_offset += rc;
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if (rc < iov[i].iov_len) break;
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}
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return total;
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} else {
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return sys_write_nt_impl(fd, NULL, 0, opt_offset);
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}
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}
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