mirror of
https://github.com/jart/cosmopolitan.git
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107 lines
4.4 KiB
C
107 lines
4.4 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 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/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.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/calls/wincrash.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/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/runtime/internal.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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bool32 ok;
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int64_t h, p;
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uint32_t err, sent;
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struct NtOverlapped overlap;
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h = g_fds.p[fd].handle;
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if (offset != -1) {
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// windows changes the file pointer even if overlapped is passed
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SetFilePointerEx(h, 0, &p, SEEK_CUR);
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}
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ok = WriteFile(h, data, _clampio(size), &sent,
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_offset2overlap(h, offset, &overlap));
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if (offset != -1) {
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// windows clobbers file pointer even on error
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SetFilePointerEx(h, p, 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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_Exitr(128 + 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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uint32_t size, wrote;
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struct NtOverlapped overlap;
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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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