Formerly file-inv-trans.c.~2~

1 files changed, 74 insertions, 0 deletions

diff --git a/libdiskfs/file-inv-trans.c b/libdiskfs/file-inv-trans.c
index 4a6752bb..6838a4a6 100644
--- a/libdiskfs/file-inv-trans.c
+++ b/libdiskfs/file-inv-trans.c
@@ -17,3 +17,77 @@
 
 #include "priv.h"
 #include "fs_S.h"
+
+/* Implement fs.defs:file_invoke_translator as described in <hurd/fs.defs>. */
+kern_return_t
+diskfs_S_file_invoke_translator (struct protid *cred,
+				 int flags,
+				 retry_type *retry,
+				 char *retry_name,
+				 mach_port_t *retrypt,
+				 mach_msg_type_name_t *retrypttype)
+{
+  error_t error = 0;
+  mode_t type;
+  struct node *np;
+  
+  /* This code is very similar (but subtly different) from
+     dir-pathtrans.c and fsys-getroot.c.  A way should be found to
+     combine them. */
+
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  flags &= O_HURD;
+
+  np = cred->po->np;
+  
+  mutex_lock (&np->lock);
+  
+  type = np->dn_stat.st_mode & S_IFMT;
+  
+ repeat_transcheck:
+  /* Ignore O_NOTRANS in the following check */
+  if (diskfs_node_translated (np) || np->translator.control != MACH_PORT_NULL)
+    {
+      mach_port_t control = np->translator.control;
+
+      if (control == MACH_PORT_NULL)
+	{
+	  /* This use of _diskfs_dotdot_file is completely and utterly
+	     bogus. XXX */
+	  if (error = diskfs_start_translator (np, _diskfs_dotdot_file))
+	    {
+	      mutex_unlock (&np->lock);
+	      return error;
+	    }
+	  control = np->translator.control;
+	}
+
+      mach_port_mod_refs (mach_task_self (), control, MACH_PORT_RIGHT_SEND, 1);
+      mutex_unlock (&np->lock);
+      error = fsys_getroot (childcontrol, cred->uids, cred->nuids, 
+			    cred->gids, cred->ngids, flags, retry,
+			    retryname, retrypt);
+      if (error == MACH_SEND_INVALID_DEST)
+	{
+	  mutex_lock (&np->lock);
+	  if (np->translator.control == control)
+	    fshelp_translator_drop (&np->translator);
+	  mach_port_deallocate (mach_task_self (), control);
+	  error = 0;
+	  goto repeat_transcheck;
+	}
+      
+      if (!error && *retrypt != MACH_PORT_NULL)
+	*retrypttype = MACH_MSG_TYPE_MOVE_SEND;
+      else
+	*retrypttype = MACH_MSG_TYPE_COPY_SEND;
+      
+      return error;
+    }
+  
+  /* Ignore O_NOTRANS here. */
+  if (type == S_IFLNK && !(flags & O_NOLINK))
+    
+