Sun Aug 9 21:09:24 1998 Jose M. Moya <josem@gnu.org>

	* diskfs.h (struct node): Add filemod_reqs member.
	(struct modreq): Rename struct dirmod to reqmod as it is used for
 	directory and file notifications.
	(diskfs_notice_filechange): Add prototype.
	* dir-chg.c (diskfs_S_dir_notice_changes): Check
 	nowait_dir_changed return value for errors.
	(diskfs_notice_dirchange): Remove requests when the notification
 	fails.
	* file-chg.c (diskfs_S_file_notice_changes): Implement.
	(diskfs_notice_filechange): New function.
	* node-make.c (diskfs_make_node): Initialize filemod_reqs.
	* node-drop.c (free_modreqs): New function.
	(diskfs_drop_node): Free filemod_reqs.
	* file-chauthor.c (dithkfth_TH_file_chauthor): Add file
 	notifications.
	* file-chflags.c (diskfs_S_file_chflags): Likewise.
	* file-chmod.c (diskfs_S_file_chmod): Likewise.
	* file-chown.c (diskfs_S_file_chown): Likewise.
	* file-set-size.c (diskfs_S_file_set_size): Likewise.
	* io-prenotify.c (diskfs_S_io_prenotify): Likewise.
	* io-write.c (diskfs_S_io_write): Likewise.
	* node-rdwr.c (diskfs_node_rdwr): Likewise.

1 files changed, 45 insertions, 3 deletions

diff --git a/libdiskfs/file-chg.c b/libdiskfs/file-chg.c
index 27d932e6..e9535591 100644
--- a/libdiskfs/file-chg.c
+++ b/libdiskfs/file-chg.c
@@ -17,11 +17,53 @@
 
 #include "priv.h"
 #include "fs_S.h"
+#include "ourfs_notify_U.h"
 
 kern_return_t
-diskfs_S_file_notice_changes (struct protid *cred __attribute__ ((unused)),
-			      mach_port_t notify __attribute__ ((unused)))
+diskfs_S_file_notice_changes (struct protid *cred, mach_port_t notify)
 {
-  return EOPNOTSUPP;
+  error_t err;
+  struct modreq *req;
+  struct node *np;
+  
+  if (!cred)
+    return EOPNOTSUPP;
+
+  np = cred->po->np;
+  mutex_lock (&np->lock);
+  err = nowait_file_changed (notify, FILE_CHANGED_NULL, 0, 0);
+  if (err)
+    {
+      mutex_unlock (&np->lock);
+      return err;
+    }
+  req = malloc (sizeof (struct modreq));
+  req->port = notify;
+  req->next = np->filemod_reqs;
+  np->filemod_reqs = req;
+  mutex_unlock (&np->lock);
+  return 0;
 }
 
+void
+diskfs_notice_filechange (struct node *dp, enum file_changed_type type,
+			  off_t start, off_t end)
+{
+  error_t err;
+  struct modreq **preq;
+  
+  preq = &dp->filemod_reqs;
+  while (*preq)
+    {
+      struct modreq *req = *preq;
+      err = nowait_file_changed (req->port, type, start, end);
+      if (err)
+	{			/* remove notify port */
+	  *preq = req->next;
+	  mach_port_deallocate (mach_task_self (), req->port);
+	  free (req);
+	}
+      else
+	preq = &req->next;
+    }
+}