1 files changed, 82 insertions, 0 deletions
diff --git a/libdiskfs/dir-chg.c b/libdiskfs/dir-chg.c
new file mode 100644
index 00000000..ed8f40c1
--- /dev/null
+++ b/libdiskfs/dir-chg.c
@@ -0,0 +1,82 @@
+/* Notifications of directory changes.
+   Copyright (C) 1994, 1995, 1998, 2001 Free Software Foundation, Inc.
+
+   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. */
+
+#include "priv.h"
+#include "fs_S.h"
+#include "fs_notify_U.h"
+
+kern_return_t
+diskfs_S_dir_notice_changes (struct protid *cred,
+			     mach_port_t notify)
+{
+  error_t err;
+  struct modreq *req;
+  struct node *np;
+
+  if (!cred)
+    return EOPNOTSUPP;
+
+  np = cred->po->np;
+  pthread_mutex_lock (&np->lock);
+  if (!S_ISDIR (np->dn_stat.st_mode))
+    {
+      pthread_mutex_unlock (&np->lock);
+      return ENOTDIR;
+    }
+  err = dir_changed (notify, np->dirmod_tick, DIR_CHANGED_NULL, "");
+  if (err)
+    {
+      pthread_mutex_unlock (&np->lock);
+      return err;
+    }
+  req = malloc (sizeof (struct modreq));
+  if (! req)
+    {
+      pthread_mutex_unlock (&np->lock);
+      return ENOMEM;
+    }
+  req->port = notify;
+  req->next = np->dirmod_reqs;
+  np->dirmod_reqs = req;
+  pthread_mutex_unlock (&np->lock);
+  return 0;
+}
+
+void
+diskfs_notice_dirchange (struct node *dp, enum dir_changed_type type,
+			 const char *name)
+{
+  error_t err;
+  struct modreq **preq;
+
+  dp->dirmod_tick++;
+  preq = &dp->dirmod_reqs;
+  while (*preq)
+    {
+      struct modreq *req = *preq;
+      err = dir_changed (req->port, dp->dirmod_tick, type, name);
+      if (err && err != MACH_SEND_TIMED_OUT)
+	{
+	  /* Remove notify port.  */
+	  *preq = req->next;
+	  mach_port_deallocate (mach_task_self (), req->port);
+	  free (req);
+	}
+      else
+	preq = &req->next;
+    }
+}