/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│ │vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│ ╞══════════════════════════════════════════════════════════════════════════════╡ │ Copyright 2020 Justine Alexandra Roberts Tunney │ │ │ │ Permission to use, copy, modify, and/or distribute this software for │ │ any purpose with or without fee is hereby granted, provided that the │ │ above copyright notice and this permission notice appear in all copies. │ │ │ │ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │ │ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │ │ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │ │ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │ │ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │ │ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │ │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │ │ PERFORMANCE OF THIS SOFTWARE. │ ╚─────────────────────────────────────────────────────────────────────────────*/ #include "libc/calls/calls.h" #include "libc/calls/strace.internal.h" #include "libc/calls/syscall-nt.internal.h" #include "libc/calls/syscall-sysv.internal.h" #include "libc/dce.h" #include "libc/intrin/asan.internal.h" #include "libc/sysv/errfuns.h" /** * Creates file-less file descriptors for interprocess communication. * * @param fd is (reader, writer) * @return 0 on success or -1 w/ errno * @raise EFAULT if pipefd is NULL or an invalid address * @raise EMFILE if RLIMIT_NOFILE is exceedde * @asyncsignalsafe * @see pipe2() */ int pipe(int pipefd[hasatleast 2]) { int rc; if (!pipefd || (IsAsan() && !__asan_is_valid(pipefd, sizeof(int) * 2))) { // needed for windows which is polyfilled // needed for xnu and netbsd which don't take an argument rc = efault(); } else if (!IsWindows()) { rc = sys_pipe(pipefd); } else { rc = sys_pipe_nt(pipefd, 0); } if (!rc) { STRACE("pipe([{%d, %d}]) → %d% m", pipefd[0], pipefd[1], rc); } else { STRACE("pipe(%p) → %d% m", pipefd, rc); } return rc; }