1 files changed, 104 insertions, 0 deletions
diff --git a/libdiskfs/fsys-getfile.c b/libdiskfs/fsys-getfile.c
new file mode 100644
index 00000000..7d125304
--- /dev/null
+++ b/libdiskfs/fsys-getfile.c
@@ -0,0 +1,104 @@
+/* Return the file for a given handle (for nfs server support)
+
+   Copyright (C) 1997,99 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 <fcntl.h>
+
+#include "priv.h"
+#include "fsys_S.h"
+#include "fhandle.h"
+
+/* Return in FILE & FILE_TYPE the file in FSYS corresponding to the NFS file
+   handle HANDLE & HANDLE_LEN.  */
+error_t
+diskfs_S_fsys_getfile (mach_port_t fsys,
+		       mach_port_t reply, mach_msg_type_name_t reply_type,
+		       uid_t *uids, mach_msg_type_number_t nuids,
+		       gid_t *gids, mach_msg_type_number_t ngids,
+		       char *handle, mach_msg_type_number_t handle_len,
+		       mach_port_t *file, mach_msg_type_name_t *file_type)
+{
+  int flags;
+  error_t err;
+  struct node *node;
+  const union diskfs_fhandle *f;
+  struct protid *new_cred;
+  struct idvec *uvec, *gvec;
+  struct iouser *user;
+  struct port_info *pt =
+    ports_lookup_port (diskfs_port_bucket, fsys, diskfs_control_class);
+
+  if (!pt)
+    return EOPNOTSUPP;
+
+  if (handle_len != sizeof *f)
+    {
+      ports_port_deref (pt);
+      return EINVAL;
+    }
+
+  f = (const union diskfs_fhandle *) handle;
+
+  err = diskfs_cached_lookup (f->data.cache_id, &node);
+  if (err)
+    {
+      ports_port_deref (pt);
+      return err;
+    }
+
+  if (node->dn_stat.st_gen != f->data.gen)
+    {
+      diskfs_nput (node);
+      ports_port_deref (pt);
+      return ESTALE;
+    }
+
+  uvec = make_idvec ();
+  gvec = make_idvec ();
+
+  idvec_set_ids (uvec, uids, nuids);
+  idvec_set_ids (gvec, gids, ngids);
+  user = iohelp_create_iouser (uvec, gvec);
+
+  flags = 0;
+  if (! fshelp_access (&node->dn_stat, S_IREAD, user))
+    flags |= O_READ;
+  if (! fshelp_access (&node->dn_stat, S_IEXEC, user))
+    flags |= O_EXEC;
+  if (! fshelp_access (&node->dn_stat, S_IWRITE, user)
+      && ! S_ISDIR (node->dn_stat.st_mode)
+      && ! diskfs_check_readonly ())
+    flags |= O_WRITE;
+
+  err = diskfs_create_protid (diskfs_make_peropen (node, flags, 0),
+			      user, &new_cred);
+
+  iohelp_free_iouser (user);
+
+  diskfs_nput (node);
+  ports_port_deref (pt);
+
+  if (! err)
+    {
+      *file = ports_get_right (new_cred);
+      *file_type = MACH_MSG_TYPE_MAKE_SEND;
+    }
+
+  return err;
+}