1 files changed, 99 insertions, 0 deletions
diff --git a/trans/symlink.c b/trans/symlink.c
new file mode 100644
index 00000000..25fa16cf
--- /dev/null
+++ b/trans/symlink.c
@@ -0,0 +1,99 @@
+/* Translator for S_IFLNK nodes
+   Copyright (C) 1994 Free Software Foundation
+
+   This program 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 program 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 this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+mach_port_t realnode, dotdotnode;
+
+/* We return this for O_NOLINK lookups */
+mach_port_t realnodenoauth;
+
+/* We return this for non O_NOLINK lookups */
+char *linktarget;
+
+main (int argc, char **argv)
+{
+  mach_port_t bootstrap;
+  mach_port_t control;
+  
+  _libports_initialize ();
+  
+  task_get_bootstrap_port (mach_task_self (), &bootstrap);
+  if (bootstrap == MACH_PORT_NULL)
+    {
+      fprintf (stderr, "%s must be started as a translator\n", argv[0]);
+      exit (1);
+    }
+  
+  if (argc != 2)
+    {
+      fprintf (stderr, "Usage: %s link-target\n", argv[0]);
+      exit (1);
+    }
+
+  linktarget = argv[1];
+
+  /* Reply to our parent */
+  control = ports_allocate_port (PT_CTL, sizeof (struct port_info));
+  error = fsys_startup (bootstrap, ports_get_right (control),
+			MACH_MSG_TYPE_MAKE_SEND, &realnode, &dotdotnode);
+
+  io_restrict_auth (realnode, &realnodenoauth, 0, 0, 0, 0);
+
+  /* Launch */
+  ports_manage_port_operations_onethread ();
+  return 0;
+}
+
+
+S_fsys_getroot (mach_port_t fsys_t,
+		uid_t *uids,
+		u_int nuids,
+		uid_t *gids,
+		u_int ngids,
+		int flags,
+		retry_type *do_retry,
+		char *retry_name,
+		mach_port_t *ret,
+		mach_port_name_t *rettype)
+{
+  if (flags & O_NOLINK)
+    {
+      /* Return our underlying node. */
+      *ret = realnodenoauth;
+      *rettype = MACH_MSG_TYPE_COPY_SEND;
+      *do_retry = FS_RETRY_REAUTH;
+      retry_name[0] = '\0';
+      return 0;
+    }
+  else
+    {
+      /* Return telling the user to follow the link */
+      strcpy (retry_name, linktarget);
+      if (linktarget[0] == '/')
+	{
+	  *do_retry = FS_RETRY_NORMAL;
+	  *ret = MACH_PORT_NULL;
+	  *rettype = MACH_MSG_TYPE_COPY_SEND;
+	}
+      else
+	{
+	  *do_retry = FS_RETRY_REAUTH;
+	  *ret = dotdotnode;
+	  *rettype = MACH_MSG_TYPE_COPY_SEND;
+	}
+    }
+  return 0;
+}