(diskfs_S_fsys_getfile):

  Implement (code from ufs).

1 files changed, 93 insertions, 28 deletions

diff --git a/libdiskfs/fsys-getfile.c b/libdiskfs/fsys-getfile.c
index 90352ead..67bd62e7 100644
--- a/libdiskfs/fsys-getfile.c
+++ b/libdiskfs/fsys-getfile.c
@@ -1,40 +1,105 @@
-/*
-   Copyright (C) 1994, 1995 Free Software Foundation
+/* Return the file for a given handle (for nfs server support)
 
-This file is part of the GNU Hurd.
+   Copyright (C) 1997 Free Software Foundation
 
-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.
+   This file is part of the GNU Hurd.
 
-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.
+   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.
 
-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.  */
+   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.
 
-/* Written by Michael I. Bushnell.  */
+   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 __attribute__ ((unused)),
-		       mach_port_t reply,
-		       mach_msg_type_name_t replytype,
-		       uid_t *gen_uids __attribute__ ((unused)),
-		       u_int ngen_uids __attribute__ ((unused)),
-		       uid_t *gen_gids __attribute__ ((unused)),
-		       u_int ngen_gids __attribute__ ((unused)),
-		       char *handle __attribute__ ((unused)),
-		       u_int handlelen __attribute__ ((unused)),
-		       mach_port_t *file __attribute__ ((unused)),
-		       mach_msg_type_name_t *filetype __attribute__ ((unused)))
+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)
 {
-  return EOPNOTSUPP;
-}
+  int flags;
+  error_t err;
+  struct node *node;
+  struct 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 (struct diskfs_fhandle))
+    {
+      ports_port_deref (pt);
+      return EINVAL;
+    }
+
+  f = (struct diskfs_fhandle *) handle;
+
+  err = diskfs_cached_lookup (f->cache_id, &node);
+  if (err)
+    {
+      ports_port_deref (pt);
+      return err;
+    }
 
+  if (node->dn_stat.st_gen != f->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,
+						   MACH_PORT_NULL, 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;
+}