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101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/* Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stddef.h>
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#include <hurd.h>
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#include <hurd/fd.h>
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#include <sys/socket.h>
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#include <hurd/socket.h>
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#include <fcntl.h>
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/* Create a one-way communication channel (pipe).
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If successul, two file descriptors are stored in FDS;
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bytes written on FDS[1] can be read from FDS[0].
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Returns 0 if successful, -1 if not. */
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int
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DEFUN(__pipe, (fds), int fds[2])
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{
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error_t err;
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socket_t server, sock1, sock2;
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int d1, d2;
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if (fds == NULL)
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return __hurd_fail (EINVAL);
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/* Find the local domain socket server. */
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server = _hurd_socket_server (PF_LOCAL, 0);
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if (server == MACH_PORT_NULL)
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return -1;
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/* Create two local domain sockets and connect them together. */
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err = __socket_create (server, SOCK_STREAM, 0, &sock1);
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if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED
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|| err == MIG_BAD_ID || err == EOPNOTSUPP)
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{
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/* On the first use of the socket server during the operation,
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allow for the old server port dying. */
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server = _hurd_socket_server (PF_LOCAL, 1);
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if (server == MACH_PORT_NULL)
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return -1;
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err = __socket_create (server, SOCK_STREAM, 0, &sock1);
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}
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if (err)
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return __hurd_fail (err);
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if (err = __socket_create (server, SOCK_STREAM, 0, &sock2))
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{
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__mach_port_deallocate (__mach_task_self (), sock1);
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return __hurd_fail (err);
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}
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if (err = __socket_connect2 (sock1, sock2))
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{
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__mach_port_deallocate (__mach_task_self (), sock1);
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__mach_port_deallocate (__mach_task_self (), sock2);
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return __hurd_fail (err);
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}
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/* Shut down the unused sides of the sockets. */
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__socket_shutdown (sock1, 1);
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__socket_shutdown (sock2, 0);
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/* Put the sockets into file descriptors. */
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d1 = _hurd_intern_fd (sock1, O_IGNORE_CTTY, 1);
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if (d1 < 0)
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{
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__mach_port_deallocate (__mach_task_self (), sock2);
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return -1;
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}
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d2 = _hurd_intern_fd (sock2, O_IGNORE_CTTY, 1);
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if (d2 < 0)
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{
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err = errno;
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(void) close (d1);
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return __hurd_fail (err);
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}
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fds[0] = d1;
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fds[1] = d2;
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return 0;
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}
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weak_alias (__pipe, pipe)
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