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sourceware.org Git - glibc.git/blob - sysdeps/mach/hurd/pipe.c
1 /* Copyright (C) 1992, 93, 94, 95, 96, 99, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
20 #include <sys/socket.h>
23 /* Create a one-way communication channel (pipe).
24 Actually the channel is two-way on the Hurd.
25 If successful, two file descriptors are stored in FDS;
26 bytes written on FDS[1] can be read from FDS[0].
27 Returns 0 if successful, -1 if not. */
31 int save_errno
= errno
;
34 /* The magic S_IFIFO protocol tells the pflocal server to create
35 sockets which report themselves as FIFOs, as POSIX requires for
37 result
= __socketpair (PF_LOCAL
, SOCK_STREAM
, S_IFIFO
, fds
);
38 if (result
== -1 && errno
== EPROTONOSUPPORT
)
40 /* We contacted an "old" pflocal server that doesn't support the
41 magic S_IFIFO protocol.
42 FIXME: Remove this junk somewhere in the future. */
43 __set_errno (save_errno
);
44 return __socketpair (PF_LOCAL
, SOCK_STREAM
, 0, fds
);
50 weak_alias (__pipe
, pipe
)
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