[tracker] Do not check locks on special files like pipes or sockets.

[Carlos Garnacho <carlosg src gnome org>]

commit f67eec357caf14185d4bbeead0babbf6e9f68b45
Author: Juan A. Suarez Romero <jasuarez igalia com>
Date:   Mon Feb 1 11:26:25 2010 +0100

    Do not check locks on special files like pipes or sockets.
    
    This avoids blocking when opening such kind of files.

 src/libtracker-common/tracker-file-utils.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/src/libtracker-common/tracker-file-utils.c b/src/libtracker-common/tracker-file-utils.c
index 843ac5e..e2650ac 100644
--- a/src/libtracker-common/tracker-file-utils.c
+++ b/src/libtracker-common/tracker-file-utils.c
@@ -791,6 +791,7 @@ tracker_file_unlock (GFile *file)
 gboolean
 tracker_file_is_locked (GFile *file)
 {
+	GFileInfo *file_info;
 	gboolean retval = FALSE;
 	gchar *path;
 	gint fd;
@@ -801,6 +802,24 @@ tracker_file_is_locked (GFile *file)
 		return FALSE;
 	}
 
+	/* Handle regular files; skip pipes and alike */
+	file_info = g_file_query_info (file,
+	                               G_FILE_ATTRIBUTE_STANDARD_TYPE,
+	                               G_FILE_QUERY_INFO_NONE,
+	                               NULL,
+	                               NULL);
+
+	if (!file_info) {
+		return FALSE;
+	}
+
+	if (g_file_info_get_file_type (file_info) != G_FILE_TYPE_REGULAR) {
+		g_object_unref (file_info);
+		return FALSE;
+	}
+
+	g_object_unref (file_info);
+
 	path = g_file_get_path (file);
 
 	if (!path) {