* sysdeps/mach/hurd/socketpair.c (__socketpair): Renamed from socketpair. Made socketpair a weak alias. * sysdeps/mach/hurd/pipe.c (__pipe): Reimplemented using __socketpair. Use S_IFIFO protocol to make pipes POSIX conforming, but fall back on the old protocol if the socket server doesn't support it. * include/sys/socket.h: Add prototype for __socketpair.

2000-08-02  Mark Kettenis  <kettenis@gnu.org>

	* sysdeps/mach/hurd/socketpair.c (__socketpair): Renamed from
	socketpair.  Made socketpair a weak alias.
	* sysdeps/mach/hurd/pipe.c (__pipe): Reimplemented using
	__socketpair.  Use S_IFIFO protocol to make pipes POSIX
	conforming, but fall back on the old protocol if the socket server
	doesn't support it.
	* include/sys/socket.h: Add prototype for __socketpair.

1 files changed, 18 insertions, 64 deletions

diff --git a/sysdeps/mach/hurd/pipe.c b/sysdeps/mach/hurd/pipe.c
index 9d62c8ca28..717fb005aa 100644
--- a/sysdeps/mach/hurd/pipe.c
+++ b/sysdeps/mach/hurd/pipe.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992, 93, 94, 95, 96, 99 Free Software Foundation, Inc.
+/* Copyright (C) 1992, 93, 94, 95, 96, 99, 2000 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
@@ -17,80 +17,34 @@
    Boston, MA 02111-1307, USA.  */
 
 #include <errno.h>
-#include <unistd.h>
-#include <stddef.h>
-#include <hurd.h>
-#include <hurd/fd.h>
 #include <sys/socket.h>
-#include <hurd/socket.h>
-#include <fcntl.h>
+#include <sys/stat.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].
    Returns 0 if successful, -1 if not.  */
 int
-__pipe (fds)
-     int fds[2];
+__pipe (int fds[2])
 {
-  error_t err;
-  socket_t server, sock1, sock2;
-  int d1, d2;
-
-  if (fds == NULL)
-    return __hurd_fail (EINVAL);
-
-  /* Find the local domain socket server.  */
-  server = _hurd_socket_server (PF_LOCAL, 0);
-  if (server == MACH_PORT_NULL)
-    return -1;
-
-  /* Create two local domain sockets and connect them together.  */
-
-  err = __socket_create (server, SOCK_STREAM, 0, &sock1);
-  if (err == MACH_SEND_INVALID_DEST || err == MIG_SERVER_DIED
-      || err == MIG_BAD_ID || err == EOPNOTSUPP)
-    {
-      /* On the first use of the socket server during the operation,
-	 allow for the old server port dying.  */
-      server = _hurd_socket_server (PF_LOCAL, 1);
-      if (server == MACH_PORT_NULL)
-	return -1;
-      err = __socket_create (server, SOCK_STREAM, 0, &sock1);
-    }
-  if (err)
-    return __hurd_fail (err);
-  if (err = __socket_create (server, SOCK_STREAM, 0, &sock2))
-    {
-      __mach_port_deallocate (__mach_task_self (), sock1);
-      return __hurd_fail (err);
-    }
-  if (err = __socket_connect2 (sock1, sock2))
-    {
-      __mach_port_deallocate (__mach_task_self (), sock1);
-      __mach_port_deallocate (__mach_task_self (), sock2);
-      return __hurd_fail (err);
-    }
-
-  /* Put the sockets into file descriptors.  */
-
-  d1 = _hurd_intern_fd (sock1, O_IGNORE_CTTY, 1);
-  if (d1 < 0)
-    {
-      __mach_port_deallocate (__mach_task_self (), sock2);
-      return -1;
-    }
-  d2 = _hurd_intern_fd (sock2, O_IGNORE_CTTY, 1);
-  if (d2 < 0)
+  int save_errno = errno;
+  int result;
+
+  /* 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, S_IFIFO, fds);
+  if (result == -1 && errno == EPROTONOSUPPORT)
     {
-      err = errno;
-      (void) close (d1);
-      return __hurd_fail (err);
+      /* 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, 0, fds);
     }
 
-  fds[0] = d1;
-  fds[1] = d2;
-  return 0;
+  return result;
 }
 
 weak_alias (__pipe, pipe)