Initial revision

1 files changed, 102 insertions, 0 deletions

diff --git a/libtrivfs/open.c b/libtrivfs/open.c
new file mode 100644
index 00000000..a9bc62fe
--- /dev/null
+++ b/libtrivfs/open.c
@@ -0,0 +1,102 @@
+/* Make a new trivfs peropen/protid
+
+   Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd 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.
+
+   The GNU Hurd 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 the GNU Hurd; see the file COPYING.  If not, write to
+   the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include <string.h>		/* For bcopy() */
+
+#include "priv.h"
+
+/* Return a new protid pointing to a new peropen in CRED, with REALNODE as
+   the underlying node reference, with the given identity, and open flags in
+   FLAGS.  CNTL is the trivfs control object.  */
+error_t
+trivfs_open (struct trivfs_control *cntl,
+	     uid_t *uids, unsigned num_uids, gid_t *gids, unsigned num_gids,
+	     unsigned flags,
+	     mach_port_t realnode,
+	     struct trivfs_protid **cred)
+{
+  error_t err = 0;
+  struct trivfs_peropen *po = malloc (sizeof (struct trivfs_peropen));
+
+  if (!po)
+    return ENOMEM;
+
+  ports_port_ref (cntl);
+
+  po->refcnt = 1;
+  po->cntl = cntl;
+  po->openmodes = flags;
+  po->hook = 0;
+
+  if (trivfs_peropen_create_hook)
+    err = (*trivfs_peropen_create_hook) (po);
+  if (!err)
+    {
+      struct trivfs_protid *new =
+	ports_allocate_port (cntl->protid_bucket,
+			     sizeof (struct trivfs_protid),
+			     cntl->protid_class);
+
+      if (new)
+	{
+	  int i;
+
+	  new->isroot = 0;
+	  for (i = 0; i < num_uids; i++)
+	    if (uids[i] == 0)
+	      new->isroot = 1;
+
+	  new->uids = malloc (num_uids * sizeof (uid_t));
+	  bcopy (uids, new->uids, num_uids * sizeof (uid_t));
+	  new->nuids = num_uids;
+
+	  new->gids = malloc (num_gids * sizeof (uid_t));
+	  bcopy (gids, new->gids, num_gids * sizeof (uid_t));
+	  new->ngids = num_gids;
+
+	  new->po = po;
+	  new->hook = 0;
+	  new->realnode = realnode;
+
+	  if (!err && trivfs_protid_create_hook)
+	    err = (*trivfs_protid_create_hook) (new);
+
+	  if (err)
+	    {
+	      /* Setting REALNODE to null signals the clean routine not to
+		 call the destroy hook, which we deallocate below anyway.  */
+	      new->realnode = MACH_PORT_NULL;
+	      ports_port_deref (new);
+	    }
+	  else
+	    *cred = new;
+	}
+      else
+	err = ENOMEM;
+    }
+
+  if (err)
+    {
+      ports_port_deref (cntl);
+      free (po);
+    }
+
+  return err;
+}