1 files changed, 94 insertions, 0 deletions
diff --git a/ufs-fsck/pass4.c b/ufs-fsck/pass4.c
new file mode 100644
index 00000000..f8fe9814
--- /dev/null
+++ b/ufs-fsck/pass4.c
@@ -0,0 +1,94 @@
+/* Pass 4 of GNU fsck -- Check reference counts
+   Copyright (C) 1994, 1996 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   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 this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "fsck.h"
+
+void
+pass4()
+{
+  ino_t number;
+  /* True if any reconnect attempt failed, in which case we don't try again. */
+  int reconn_failed = 0;
+  
+  for (number = ROOTINO; number < maxino; number++)
+    {
+      if (linkfound[number] && inodestate[number] != UNALLOC)
+	{
+	  if (linkcount[number] != linkfound[number])
+	    {
+	      pinode (0, number,
+		      "LINK COUNT %d SHOULD BE %d IN",
+		      linkcount[number], linkfound[number]);
+	      if (preen || reply ("ADJUST"))
+		{
+		  struct dinode dino;
+		  getinode (number, &dino);
+		  dino.di_nlink = linkfound[number];
+		  write_inode (number, &dino);
+		  pfix ("ADJUSTED");
+		}
+	    }
+	}
+      else if (linkfound[number] && inodestate[number] == UNALLOC)
+	{
+	  /* This can't happen because we never count links to unallocated
+	     nodes. */
+	  errexit ("LINK RECORDED FOR UNALLOCATED NODE");
+	}
+      else if (!linkfound[number] && inodestate[number] != UNALLOC)
+	{
+	  /* No links to allocated node.  If the size is zero, then
+	     we want to clear it; if the size is positive, then we
+	     want to reattach in. */
+	  struct dinode dino;
+
+	  pinode (0, number, "UNREF");
+	  
+	  getinode (number, &dino);
+	  if (dino.di_size && !reconn_failed)
+	    {
+	      /* This can't happen for dirctories because pass 3 should
+		 already have reset them up.  */
+	      if ((DI_MODE (&dino) & IFMT) == IFDIR)
+		errexit ("NO LINKS TO NONZERO DIRECTORY");
+	      
+	      if (preen || reply ("RECONNECT"))
+		reconn_failed = !linkup (number, -1);
+	      if (! reconn_failed)
+		pfix ("RECONNECTED");
+	      if (preen && reconn_failed)
+		pfail ("RECONNECT FAILED");
+	    }
+	  if (dino.di_size == 0 || reconn_failed)
+	    {
+	      if (reconn_failed && !preen)
+		/* If preening, the previous call to problem is still active
+		   (more likely the failure was too severe, and exited).  */
+		problem (0, "RECONNECT FAILED");
+	      if (preen || reply ("CLEAR"))
+		{
+		  inodestate[number] = UNALLOC;
+		  clear_inode (number, &dino);
+		  pfix ("CLEARED");
+		}
+	    }
+	}
+    }
+}