From 2a6eb1990270efcba887f0468f64d17ff173002a Mon Sep 17 00:00:00 2001
From: Miles Bader <miles@gnu.org>
Date: Sat, 12 Aug 1995 00:56:01 +0000
Subject: Initial revision
---
libtrivfs/open.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 102 insertions(+)
create mode 100644 libtrivfs/open.c
(limited to 'libtrivfs/open.c')
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;
+}
--
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