mirror of
https://github.com/jart/cosmopolitan.git
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3a9cac4892
- Fix mkdeps.com out of memory error - Remove static memory from __get_cpu_count() - Add support for passing hyphen to cat in cocmd - Change more ZipOS errors from ENOTSUP to EROFS - Specify mem_unit in sysinfo() output on BSD OSes
60 lines
3.3 KiB
C
60 lines
3.3 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/syscall-nt.internal.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/strace.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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* Creates file-less file descriptors for interprocess communication.
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*
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* This function offers atomic operation on all supported platforms
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* except for XNU and RHEL5 where it's polyfilled.
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*
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* @params flags may contain `O_CLOEXEC`, `O_NONBLOCK`, and `O_DIRECT`
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* @raise EINVAL if flags has invalid or unsupported bits
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* @raise EFAULT if `pipefd` doesn't point to valid memory
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* @raise EMFILE if process `RLIMIT_NOFILE` has been reached
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* @raise ENFILE if system-wide file limit has been reached
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* @param pipefd is used to return (reader, writer) file descriptors
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* @param flags can have O_CLOEXEC or O_DIRECT or O_NONBLOCK
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* @return 0 on success, or -1 w/ errno and pipefd isn't modified
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*/
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int pipe2(int pipefd[hasatleast 2], int flags) {
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int rc;
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if (flags & ~(O_CLOEXEC | O_NONBLOCK | O_DIRECT)) {
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return einval();
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} else if (!pipefd ||
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(IsAsan() && !__asan_is_valid(pipefd, sizeof(int) * 2))) {
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rc = efault();
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} else if (!IsWindows()) {
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rc = sys_pipe2(pipefd, flags);
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} else {
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rc = sys_pipe_nt(pipefd, flags);
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}
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if (!rc) {
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STRACE("pipe2([{%d, %d}], %#o) → %d% m", pipefd[0], pipefd[1], flags, rc);
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} else {
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STRACE("pipe2(%p, %#o) → %d% m", pipefd, flags, rc);
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}
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return rc;
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}
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