mirror of
https://github.com/jart/cosmopolitan.git
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933411ba99
- Fix bugs in kDos2Errno definition - malloc() should now be thread safe - Fix bug in rollup.com header generator - Fix open(O_APPEND) on the New Technology - Fix select() on the New Technology and test it - Work towards refactoring i/o for thread safety - Socket reads and writes on NT now poll for signals - Work towards i/o completion ports on the New Technology - Make read() and write() intermittently check for signals - Blinkenlights keyboard i/o so much better on NT w/ poll() - You can now poll() files and sockets at the same time on NT - Fix bug in appendr() that manifests with dlmalloc footers off
88 lines
4 KiB
C
88 lines
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/bits/bits.h"
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#include "libc/bits/weaken.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/mem/mem.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/sock/internal.h"
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#include "libc/sock/ntstdin.internal.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Implements dup(), dup2(), dup3(), and F_DUPFD for Windows.
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*/
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textwindows int sys_dup_nt(int oldfd, int newfd, int flags, int start) {
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int64_t proc, handle;
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// validate the api usage
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if (oldfd < 0) return einval();
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if (flags & ~O_CLOEXEC) return einval();
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if (oldfd >= g_fds.n ||
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(g_fds.p[oldfd].kind != kFdFile && g_fds.p[oldfd].kind != kFdSocket &&
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g_fds.p[oldfd].kind != kFdConsole)) {
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return ebadf();
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}
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// allocate a new file descriptor
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if (newfd == -1) {
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if ((newfd = __reservefd(start)) == -1) {
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return -1;
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}
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} else {
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if (__ensurefds(newfd) == -1) return -1;
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if (g_fds.p[newfd].kind) close(newfd);
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g_fds.p[newfd].kind = kFdReserved;
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}
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// if this file descriptor is wrapped in a named pipe worker thread
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// then we should clone the original authentic handle rather than the
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// stdin worker's named pipe. we won't clone the worker, since that
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// can always be recreated again on demand.
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if (g_fds.p[oldfd].worker) {
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handle = g_fds.p[oldfd].worker->reader;
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} else {
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handle = g_fds.p[oldfd].handle;
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}
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proc = GetCurrentProcess();
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if (DuplicateHandle(proc, handle, proc, &g_fds.p[newfd].handle, 0, true,
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kNtDuplicateSameAccess)) {
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g_fds.p[newfd].kind = g_fds.p[oldfd].kind;
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g_fds.p[newfd].mode = g_fds.p[oldfd].mode;
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g_fds.p[newfd].flags = g_fds.p[oldfd].flags & ~O_CLOEXEC;
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if (flags & O_CLOEXEC) g_fds.p[newfd].flags |= O_CLOEXEC;
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if (g_fds.p[oldfd].kind == kFdSocket && weaken(_dupsockfd)) {
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g_fds.p[newfd].extra =
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(intptr_t)weaken(_dupsockfd)((struct SockFd *)g_fds.p[oldfd].extra);
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} else {
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g_fds.p[newfd].extra = g_fds.p[oldfd].extra;
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}
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if (g_fds.p[oldfd].worker) {
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g_fds.p[newfd].worker = weaken(RefNtStdinWorker)(g_fds.p[oldfd].worker);
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}
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return newfd;
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} else {
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__releasefd(newfd);
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return __winerr();
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}
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}
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