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gio + inotify support for hard links

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Add a new GFileMonitorFlag: G_FILE_MONITOR_WATCH_HARD_LINKS.  When set,
changes made to the file via another hard link will be detected.

Implement the new flag for the inotify backend.

https://bugzilla.gnome.org/show_bug.cgi?id=532815
This commit is contained in:
Ryan Lortie
2009-11-18 17:59:14 -06:00
committed by Dan Winship
parent e6d45972fc
commit 707bc4a40f
9 changed files with 328 additions and 67 deletions
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19
gio/gfile.c
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@@ -4845,6 +4845,12 @@ g_file_eject_mountable_with_operation_finish (GFile *file,
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* It does not make sense for @flags to contain
* %G_FILE_MONITOR_WATCH_HARD_LINKS, since hard links can not be made to
* directories. It is not possible to monitor all the files in a
* directory for changes made via hard links; if you want to do this then
* you must register individual watches with g_file_monitor().
*
* Virtual: monitor_dir
* Returns: (transfer full): a #GFileMonitor for the given @file,
* or %NULL on error.
@@ -4859,6 +4865,7 @@ g_file_monitor_directory (GFile *file,
GFileIface *iface;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (~flags & G_FILE_MONITOR_WATCH_HARD_LINKS, NULL);
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return NULL;
@@ -4891,6 +4898,14 @@ g_file_monitor_directory (GFile *file,
* triggering the cancellable object from another thread. If the operation
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
*
* If @flags contains %G_FILE_MONITOR_WATCH_HARD_LINKS then the monitor
* will also attempt to report changes made to the file via another
* filename (ie, a hard link). Without this flag, you can only rely on
* changes made through the filename contained in @file to be
* reported. Using this flag may result in an increase in resource
* usage, and may not have any effect depending on the #GFileMonitor
* backend and/or filesystem type.
*
* Returns: (transfer full): a #GFileMonitor for the given @file,
* or %NULL on error.
* Free the returned object with g_object_unref().
@@ -4951,7 +4966,9 @@ g_file_monitor (GFile *file,
GError **error)
{
if (g_file_query_file_type (file, 0, cancellable) == G_FILE_TYPE_DIRECTORY)
return g_file_monitor_directory (file, flags, cancellable, error);
return g_file_monitor_directory (file,
flags & ~G_FILE_MONITOR_WATCH_HARD_LINKS,
cancellable, error);
else
return g_file_monitor_file (file, flags, cancellable, error);
}