60 lines
2.0 KiB
C
60 lines
2.0 KiB
C
/* Copyright (C) 1992-2022 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <fcntl-internal.h>
|
|
#include <hurd.h>
|
|
|
|
/* Create a one-way communication channel (pipe).
|
|
Actually the channel is two-way on the Hurd.
|
|
If successful, two file descriptors are stored in FDS;
|
|
bytes written on FDS[1] can be read from FDS[0].
|
|
Apply FLAGS to the new file descriptors.
|
|
Returns 0 if successful, -1 if not. */
|
|
int
|
|
__pipe2 (int fds[2], int flags)
|
|
{
|
|
int save_errno = errno;
|
|
int result;
|
|
|
|
if (flags & ~(O_CLOEXEC | O_NONBLOCK))
|
|
return __hurd_fail (EINVAL);
|
|
|
|
flags = o_to_sock_flags (flags);
|
|
|
|
/* The magic S_IFIFO protocol tells the pflocal server to create
|
|
sockets which report themselves as FIFOs, as POSIX requires for
|
|
pipes. */
|
|
result = __socketpair (PF_LOCAL, SOCK_STREAM | flags, S_IFIFO, fds);
|
|
if (result == -1 && errno == EPROTONOSUPPORT)
|
|
{
|
|
/* We contacted an "old" pflocal server that doesn't support the
|
|
magic S_IFIFO protocol.
|
|
FIXME: Remove this junk somewhere in the future. */
|
|
__set_errno (save_errno);
|
|
return __socketpair (PF_LOCAL, SOCK_STREAM | flags, 0, fds);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
weak_alias (__pipe2, pipe2)
|