Allow /hurd/init to be a symlink.

* libdiskfs/boot-start.c (diskfs_start_bootstrap): Retry `dir_lookup'
  calls for INITNAME until either SYMLOOP_MAX is reached or the lookup
  process completes.

1 files changed, 13 insertions, 1 deletions

diff --git a/libdiskfs/boot-start.c b/libdiskfs/boot-start.c
index e73e4d37..15563bdb 100644
--- a/libdiskfs/boot-start.c
+++ b/libdiskfs/boot-start.c
@@ -1,5 +1,5 @@
 /*
-   Copyright (C) 1993,94,95,96,97,98,99,2000,01,02,10
+   Copyright (C) 1993,94,95,96,97,98,99,2000,01,02,10,11
    	Free Software Foundation, Inc.
 
 This file is part of the GNU Hurd.
@@ -104,6 +104,7 @@ diskfs_start_bootstrap ()
   struct protid *rootpi;
   struct peropen *rootpo;
   mach_port_t diskfs_exec;
+  unsigned int init_lookups = 0;
 
   /* Create the port for current and root directory.  */
   err = diskfs_make_peropen (diskfs_root_node, O_READ | O_EXEC, 0,
@@ -222,8 +223,10 @@ diskfs_start_bootstrap ()
       initname = exec_argv + 1;
     }
 
+ lookup_init:
   err = dir_lookup (root_pt, initname, O_READ, 0,
 		    &retry, pathbuf, &startup_pt);
+  init_lookups++;
   if (err)
     {
       printf ("\nCannot find startup program `%s': %s\n",
@@ -232,6 +235,15 @@ diskfs_start_bootstrap ()
       free (exec_argv);
       assert_perror (err);	/* XXX this won't reboot properly */
     }
+  else if (retry == FS_RETRY_MAGICAL && pathbuf[0] == '/')
+    {
+      assert (init_lookups < SYMLOOP_MAX);
+
+      /* INITNAME is a symlink with an absolute target, so try again.  */
+      initname = strdupa (pathbuf);
+      goto lookup_init;
+    }
+
   assert (retry == FS_RETRY_NORMAL);
   assert (pathbuf[0] == '\0');