Initial revision

17 files changed, 668 insertions, 0 deletions

diff --git a/libdiskfs/io-async-icky.c b/libdiskfs/io-async-icky.c
new file mode 100644
index 00000000..4ad80e89
--- /dev/null
+++ b/libdiskfs/io-async-icky.c
@@ -0,0 +1,27 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_get_icky_async_id as described in <hurd/io.defs>. */
+error_t
+diskfs_S_io_get_icky_async_id (struct protid *cred,
+			       mach_port_t *idport)
+{
+  *idport = MACH_PORT_NULL;
+  return 0;
+}
diff --git a/libdiskfs/io-async.c b/libdiskfs/io-async.c
new file mode 100644
index 00000000..7c50e75b
--- /dev/null
+++ b/libdiskfs/io-async.c
@@ -0,0 +1,30 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_async as described in <hurd/io.defs>. */
+error_t
+diskfs_S_io_async (struct protid *cred,
+		   mach_port_t notify,
+		   mach_port_t *idport)
+{
+  mach_port_deallocate (mach_task_self (), notify);
+  *idport = MACH_PORT_NULL;
+  return EOPNOTSUPP;
+}
+
diff --git a/libdiskfs/io-duplicate.c b/libdiskfs/io-duplicate.c
new file mode 100644
index 00000000..88f0b381
--- /dev/null
+++ b/libdiskfs/io-duplicate.c
@@ -0,0 +1,35 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_duplicate as described in <hurd/io.defs>. */
+error_t
+diskfs_S_io_duplicate (struct protid *cred,
+		       mach_port_t *port,
+		       mach_msg_type_name_t *portpoly)
+{
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  mutex_lock (&cred->po->np->lock);
+  *port = (make_protid (cred->po, cred->uids, cred->nuids, cred->gids, 
+			cred->ngids))->fspt.pi.port;
+  *portpoly = MACH_MSG_TYPE_MAKE_SEND;
+  mutex_unlock (&cred->po->np->lock);
+  return 0;
+}
diff --git a/libdiskfs/io-get-conch.c b/libdiskfs/io-get-conch.c
new file mode 100644
index 00000000..68558952
--- /dev/null
+++ b/libdiskfs/io-get-conch.c
@@ -0,0 +1,44 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_get_conch as described in <hurd/io.defs>. */
+error_t
+S_io_get_conch (struct protid *cred)
+{
+  struct node *np;
+  int error = 0;
+  
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  np = cred->po->np;
+  
+  mutex_lock (&np->lock);
+
+  if (!cred->mapped)
+    {
+      mutex_unlock (&np->lock);
+      return EINVAL;
+    }
+
+  error = ioserver_handle_io_get_conch (&np->conch, cred, cred->mapped);
+
+  mutex_unlock (&np->lock);
+  return error;
+}
diff --git a/libdiskfs/io-interrupt.c b/libdiskfs/io-interrupt.c
new file mode 100644
index 00000000..1348a2a2
--- /dev/null
+++ b/libdiskfs/io-interrupt.c
@@ -0,0 +1,28 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_interrupt as described in <hurd/io.defs>. */
+error_t
+S_io_interrupt (struct protid *cred)
+{
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  return 0;
+}
diff --git a/libdiskfs/io-map-cntl.c b/libdiskfs/io-map-cntl.c
new file mode 100644
index 00000000..5c3aadd9
--- /dev/null
+++ b/libdiskfs/io-map-cntl.c
@@ -0,0 +1,48 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_map_cntl as described in <hurd/io.defs>. */
+error_t
+S_io_map_cntl (struct protid *cred,
+	       memory_object_t *ctlobj)
+{
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  assert (__vm_page_size >= sizeof (struct shared_io));
+  mutex_lock (&cred->po->np->lock);
+  if (!cred->mapped)
+    {
+      default_pager_object_create (default_pager, &cred->shared_object,
+				   __vm_page_size);
+      vm_map (mach_task_self (), (u_int *)&cred->mapped, __vm_page_size, 0, 1, 
+	      cred->shared_object, 0, 0, VM_PROT_READ|VM_PROT_WRITE,
+	      VM_PROT_READ|VM_PROT_WRITE, 0);
+      cred->mapped->conch_status = USER_HAS_NOT_CONCH;
+      spin_lock_init (&cred->mapped->lock);
+      *ctlobj = cred->shared_object;
+      mutex_unlock (&cred->po->np->lock);
+      return 0;
+    }
+  else
+    {
+      mutex_unlock (&cred->po->np->lock);
+      return EBUSY;
+    }
+}
diff --git a/libdiskfs/io-map.c b/libdiskfs/io-map.c
new file mode 100644
index 00000000..2e8a6b6d
--- /dev/null
+++ b/libdiskfs/io-map.c
@@ -0,0 +1,35 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_map as described in <hurd/io.defs>. */
+error_t
+S_io_map (struct protid *cred,
+	  memory_object_t *rdobj,
+	  mach_msg_type_name_t *rdtype,
+	  memory_object_t *wrobj,
+	  mach_msg_type_name_t *wrtype)
+{
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  *rdobj = diskfs_get_filemap (cred->po->np);
+  *rdtype = *wrtype = MACH_MSG_TYPE_MAKE_SEND;
+  *wrobj = *rdobj;
+  return 0;
+}
diff --git a/libdiskfs/io-modes-get.c b/libdiskfs/io-modes-get.c
new file mode 100644
index 00000000..a9f20630
--- /dev/null
+++ b/libdiskfs/io-modes-get.c
@@ -0,0 +1,33 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_get_all_openmodes as described in <hurd/io.defs>. */
+error_t
+S_io_get_all_openmodes (struct protid *cred,
+			int *bits)
+{
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  mutex_lock (&cred->po->ip->lock);
+  *bits = cred->po->openstat;
+  mutex_unlock (&cred->po->ip->lock);
+  return err;
+}
+v
diff --git a/libdiskfs/io-modes-off.c b/libdiskfs/io-modes-off.c
new file mode 100644
index 00000000..074da839
--- /dev/null
+++ b/libdiskfs/io-modes-off.c
@@ -0,0 +1,34 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_clear_some_openmodes as described in <hurd/io.defs>. */
+error_t
+diskfs_S_io_clear_some_openmodes (struct protid *cred,
+				  int offbits)
+{
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  mutex_lock (&cred->po->ip->lock);
+  ioserver_get_conch (&np->conch);
+  if (!err)
+    cred->po->openstat &= ~(modes & HONORED_STATE_MODES);
+  mutex_unlock (&cred->po->ip->lock);
+  return err;
+}
diff --git a/libdiskfs/io-modes-on.c b/libdiskfs/io-modes-on.c
new file mode 100644
index 00000000..a2004fa6
--- /dev/null
+++ b/libdiskfs/io-modes-on.c
@@ -0,0 +1,34 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_set_some_openmodes as described in <hurd/io.defs>. */
+error_t
+diskfs_S_io_set_some_openmodes (struct protid *cred,
+				int newbits)
+{
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  mutex_lock (&cred->po->ip->lock);
+  ioserver_get_conch (&np->conch);
+  if (!err)
+    cred->po->openstat |= (modes & HONORED_STATE_MODES);
+  mutex_unlock (&cred->po->ip->lock);
+  return err;
+}
diff --git a/libdiskfs/io-modes-set.c b/libdiskfs/io-modes-set.c
new file mode 100644
index 00000000..4159b0ac
--- /dev/null
+++ b/libdiskfs/io-modes-set.c
@@ -0,0 +1,32 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* Implement io_set_all_openmodes as described in <hurd/io.defs>. */
+error_t
+S_io_set_all_openmodes (struct protid *cred,
+			int newbits)
+{
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  mutex_lock (&cred->po->ip->lock);
+  err = ioserver_get_conch (&np->conch);
+  if (!err)
+    cred->po->openstat = (modes & HONORED_STATE_MODES);
+  mutex_unlock (&cred->po->ip->lock);
+  return err;
+}
diff --git a/libdiskfs/io-owner-mod.c b/libdiskfs/io-owner-mod.c
new file mode 100644
index 00000000..c700ad32
--- /dev/null
+++ b/libdiskfs/io-owner-mod.c
@@ -0,0 +1,35 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_mod_owner as described in <hurd/io.defs>. */
+error_t
+S_io_mod_owner (struct protid *cred,
+	      pid_t owner)
+{
+  struct node *np;
+
+  if (!cred)
+    return EOPNOTSUPP;
+  np = cred->po->np;
+  
+  mutex_lock (&np->lock);
+  np->owner = owner;
+  mutex_unlock (&np->lock);
+  return 0;
+}
diff --git a/libdiskfs/io-reauthenticate.c b/libdiskfs/io-reauthenticate.c
new file mode 100644
index 00000000..aa14c0f9
--- /dev/null
+++ b/libdiskfs/io-reauthenticate.c
@@ -0,0 +1,71 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_reathenticate as described in <hurd/io.defs>. */
+error_t
+S_io_reauthenticate (struct protid *cred, 
+		     int rend_int)
+{
+  struct protid *newcred;
+  uid_t *gen_uids = alloca (sizeof (uid_t) * 20);
+  uid_t *gen_gids = alloca (sizeof (uid_t) * 20);
+  uid_t *aux_uids = alloca (sizeof (uid_t) * 20);
+  uid_t *aux_gids = alloca (sizeof (uid_t) * 20);
+  u_int genuidlen, gengidlen, auxuidlen, auxgidlen;
+  uid_t *gubuf, *ggbuf, *aubuf, *agbuf;
+  error_t err;
+
+  if (cred == 0)
+    return EOPNOTSUPP;
+
+  genuidlen = gengidlen = auxuidlen = auxgidlen = 20;
+  gubuf = gen_uids; ggbuf = gen_gids;
+  aubuf = aux_uids; agbuf = aux_gids;
+
+  mutex_lock (&cred->po->np->lock);
+  newcred = start_making_protid (cred->po);
+  err = auth_server_authenticate (auth_server_port, 
+				  cred->fspt.pi.port,
+				  MACH_MSG_TYPE_MAKE_SEND,
+				  rend_int,
+				  newcred->fspt.pi.port,
+				  MACH_MSG_TYPE_MAKE_SEND,
+				  &gen_uids, &genuidlen, 
+				  &aux_uids, &auxuidlen,
+				  &gen_gids, &gengidlen,
+				  &aux_gids, &auxgidlen);
+  assert (!err);		/* XXX */
+
+  finish_protid (newcred, gen_uids, genuidlen, gen_gids, gengidlen);
+
+  if (gubuf != gen_uids)
+    vm_deallocate (mach_task_self (), (u_int) gen_uids,
+		   genuidlen * sizeof (uid_t));
+  if (ggbuf != gen_gids)
+    vm_deallocate (mach_task_self (), (u_int) gen_gids,
+		   gengidlen * sizeof (uid_t));
+  if (aubuf != aux_uids)
+    vm_deallocate (mach_task_self (), (u_int) aux_uids,
+		   auxuidlen * sizeof (uid_t));
+  if (agbuf != aux_gids)
+    vm_deallocate (mach_task_self (), (u_int) aux_gids,
+		   auxgidlen * sizeof (uid_t));
+  
+  return 0;
+}
diff --git a/libdiskfs/io-rel-conch.c b/libdiskfs/io-rel-conch.c
new file mode 100644
index 00000000..6c9ee879
--- /dev/null
+++ b/libdiskfs/io-rel-conch.c
@@ -0,0 +1,44 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_release_conch as described in <hurd/io.defs>. */
+error_t
+S_io_release_conch (struct protid *cred)
+{
+  struct node *np;
+  int error = 0;
+  
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  np = cred->po->np;
+  mutex_lock (&np->lock);
+  if (!cred->mapped)
+    {
+      mutex_unlock (&np->lock);
+      return EINVAL;
+    }
+  
+  np = cred->po->np;
+  
+  ioserver_handle_io_release_conch (&ip->i_conch, cred);
+  
+  mutex_unlock (&ip->i_toplock);
+  return 0;
+}
diff --git a/libdiskfs/io-restrict-auth.c b/libdiskfs/io-restrict-auth.c
new file mode 100644
index 00000000..88797c42
--- /dev/null
+++ b/libdiskfs/io-restrict-auth.c
@@ -0,0 +1,63 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Tell if the array LIST (of size N) contains a member equal to QUERY. */
+static inline int
+listmember (int *list, int query, int n)
+{
+  int i;
+  for (i = 0; i < n; i++)
+    if (list[i] == query)
+      return 1;
+  return 0;
+}
+
+/* Implement io_restrict_auth as described in <hurd/io.defs>. */
+error_t
+diskfs_S_io_restrict_auth (struct protid *cred,
+			   mach_port_t *newport,
+			   mach_msg_type_name_t *newportpoly,
+			   uid_t *uids,
+			   u_int nuids,
+			   gid_t *gids,
+			   u_int ngids)
+{
+  uid_t *newuids, *newgids;
+  int i, newnuids, newngids;
+  
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  newuids = alloca (sizeof (uid_t) * cred->nuids);
+  newgids = alloca (sizeof (uid_t) * cred->ngids);
+  
+  for (i = newnuids = 0; i < cred->nuids; i++)
+    if (listmember (uids, cred->uids[i], nuids))
+      newuids[newnuids++] = cred->uids[i];
+  for (i = newngids = 0; i < cred->ngids; i++)
+    if (listmember (gids, cred->gids[i], ngids))
+      newgids[newngids++] = cred->gids[i];
+      
+  mutex_lock (&cred->po->ip->i_toplock);
+  *newport = (make_protid (cred->po, newuids, newnuids, newgids,
+			   newngids))->fspt.pi.port;
+  mutex_unlock (&cred->po->ip->i_toplock);
+  *newportpoly = MACH_MSG_TYPE_MAKE_SEND;
+  return 0;
+}
diff --git a/libdiskfs/io-select.c b/libdiskfs/io-select.c
new file mode 100644
index 00000000..62c0a280
--- /dev/null
+++ b/libdiskfs/io-select.c
@@ -0,0 +1,35 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_select as described in <hurd/io.defs>. */
+error_t
+diskfs_S_io_select (struct protid *cred,
+		    int type, 
+		    mach_port_t port,
+		    int tag,
+		    int *possible)
+{
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  /* Select is always possible */
+  mach_port_deallocate (mach_task_self (), port);
+  *possible = type;
+  return 0;
+}
diff --git a/libdiskfs/io-stat.c b/libdiskfs/io-stat.c
new file mode 100644
index 00000000..4e504b3a
--- /dev/null
+++ b/libdiskfs/io-stat.c
@@ -0,0 +1,40 @@
+/* 
+   Copyright (C) 1994 Free Software Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Implement io_stat as described in <hurd/io.defs>. */
+error_t
+diskfs_S_io_stat (struct protid *cred,
+		  io_statbuf_t *statbuf)
+{
+  struct node *np;
+  error_t error;
+
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  np = cred->po->np;
+  mutex_lock (&ip->lock);
+  error = ioserver_get_conch (&ip->i_conch);
+  if (!error)
+    bcopy (np->dn_stat, statbuf, sizeof (struct stat));
+
+ out:
+  mutex_unlock (&ip->i_toplock);
+  return error;
+}