| /* GIO - GLib Input, Output and Streaming Library |
| * |
| * Copyright (C) 2006-2007 Red Hat, Inc. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General |
| * Public License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
| * Boston, MA 02111-1307, USA. |
| * |
| * Authors: Alexander Larsson <alexl@redhat.com> |
| * John McCutchan <john@johnmccutchan.com> |
| * Sebastian Dröge <slomo@circular-chaos.org> |
| */ |
| |
| #include "config.h" |
| #include <fam.h> |
| #include <gio/gfilemonitor.h> |
| |
| #include "gfile.h" |
| #include "fam-helper.h" |
| |
| static FAMConnection* fam_connection = NULL; |
| static gint fam_watch_id = 0; |
| G_LOCK_DEFINE_STATIC(fam_connection); |
| |
| struct _fam_sub |
| { |
| gchar *pathname; |
| gboolean directory; |
| gpointer user_data; |
| gboolean cancelled; |
| FAMRequest request; |
| }; |
| |
| /* This uses int as the argument type because the |
| real type differs between implementations: |
| gamin has "typedef enum FAMCodes {....} FAMCodes;" |
| fam has "enum FAMCodes { ... }". |
| */ |
| static GFileMonitorEvent |
| fam_event_to_file_monitor_event (int code) |
| { |
| switch (code) |
| { |
| case FAMChanged: |
| return G_FILE_MONITOR_EVENT_CHANGED; |
| break; |
| case FAMDeleted: |
| return G_FILE_MONITOR_EVENT_DELETED; |
| break; |
| case FAMCreated: |
| return G_FILE_MONITOR_EVENT_CREATED; |
| break; |
| default: |
| return -1; |
| break; |
| } |
| } |
| |
| static gboolean |
| fam_do_iter_unlocked (void) |
| { |
| while (fam_connection != NULL && FAMPending (fam_connection)) |
| { |
| FAMEvent ev; |
| fam_sub* sub = NULL; |
| gboolean cancelled; |
| |
| if (FAMNextEvent (fam_connection, &ev) != 1) |
| { |
| FAMClose (fam_connection); |
| g_free (fam_connection); |
| g_source_remove (fam_watch_id); |
| fam_watch_id = 0; |
| fam_connection = NULL; |
| return FALSE; |
| } |
| |
| sub = (fam_sub*)ev.userdata; |
| cancelled = sub->cancelled; |
| if (ev.code == FAMAcknowledge && cancelled) |
| { |
| _fam_sub_free (sub); |
| continue; |
| } |
| |
| if (cancelled) |
| continue; |
| |
| if (sub->directory) |
| { |
| GFileMonitor* monitor = G_FILE_MONITOR (sub->user_data); |
| GFileMonitorEvent eflags = fam_event_to_file_monitor_event (ev.code); |
| gchar* path = NULL; |
| GFile *child, *parent; |
| |
| /* unsupported event */ |
| if (eflags == -1) |
| continue; |
| |
| if (ev.filename[0] == '/') |
| path = g_strdup (ev.filename); |
| else |
| path = g_strdup_printf ("%s/%s", sub->pathname, ev.filename); |
| |
| child = g_file_new_for_path (path); |
| parent = g_file_get_parent (child); |
| g_file_monitor_emit_event (monitor, child, NULL, eflags); |
| g_free (path); |
| g_object_unref (child); |
| g_object_unref (parent); |
| } |
| else |
| { |
| GFile *child; |
| GFileMonitor* monitor = G_FILE_MONITOR (sub->user_data); |
| GFileMonitorEvent eflags = fam_event_to_file_monitor_event (ev.code); |
| gchar* path = NULL; |
| |
| if (eflags == -1) |
| continue; |
| path = g_strdup (ev.filename); |
| child = g_file_new_for_path (path); |
| g_file_monitor_emit_event (monitor, child, NULL, eflags); |
| g_free (path); |
| g_object_unref (child); |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| fam_callback (GIOChannel *source, |
| GIOCondition condition, |
| gpointer data) |
| { |
| gboolean res; |
| G_LOCK (fam_connection); |
| |
| res = fam_do_iter_unlocked (); |
| |
| G_UNLOCK (fam_connection); |
| return res; |
| } |
| |
| gboolean |
| _fam_sub_startup (void) |
| { |
| GIOChannel *ioc; |
| |
| G_LOCK (fam_connection); |
| |
| if (fam_connection == NULL) |
| { |
| fam_connection = g_new0 (FAMConnection, 1); |
| if (FAMOpen2 (fam_connection, "gvfs user") != 0) |
| { |
| g_warning ("FAMOpen failed, FAMErrno=%d\n", FAMErrno); |
| g_free (fam_connection); |
| fam_connection = NULL; |
| G_UNLOCK (fam_connection); |
| return FALSE; |
| } |
| #ifdef HAVE_FAM_NO_EXISTS |
| /* This is a gamin extension that avoids sending all the Exists event for dir monitors */ |
| FAMNoExists (fam_connection); |
| #endif |
| ioc = g_io_channel_unix_new (FAMCONNECTION_GETFD(fam_connection)); |
| fam_watch_id = g_io_add_watch (ioc, |
| G_IO_IN | G_IO_HUP | G_IO_ERR, |
| fam_callback, fam_connection); |
| g_io_channel_unref (ioc); |
| } |
| |
| G_UNLOCK (fam_connection); |
| |
| return TRUE; |
| } |
| |
| void |
| _fam_sub_shutdown (void) |
| { |
| G_LOCK (fam_connection); |
| |
| if (fam_connection != NULL) |
| { |
| FAMClose (fam_connection); |
| g_free (fam_connection); |
| g_source_remove (fam_watch_id); |
| fam_watch_id = 0; |
| fam_connection = NULL; |
| } |
| |
| G_UNLOCK (fam_connection); |
| } |
| |
| fam_sub* |
| _fam_sub_add (const gchar *pathname, |
| gboolean directory, |
| gpointer user_data) |
| { |
| fam_sub *sub; |
| |
| if (!_fam_sub_startup ()) |
| return NULL; |
| |
| G_LOCK (fam_connection); |
| /* We need to queue up incoming messages to avoid blocking on write |
| * if there are many monitors being canceled */ |
| fam_do_iter_unlocked (); |
| |
| if (fam_connection == NULL) |
| { |
| G_UNLOCK (fam_connection); |
| return NULL; |
| } |
| |
| sub = g_new0 (fam_sub, 1); |
| sub->pathname = g_strdup (pathname); |
| sub->directory = directory; |
| sub->user_data = user_data; |
| |
| if (directory) |
| FAMMonitorDirectory (fam_connection, pathname, &sub->request, sub); |
| else |
| FAMMonitorFile (fam_connection, pathname, &sub->request, sub); |
| |
| G_UNLOCK (fam_connection); |
| |
| return sub; |
| } |
| |
| gboolean |
| _fam_sub_cancel (fam_sub* sub) |
| { |
| if (sub->cancelled) |
| return TRUE; |
| |
| sub->cancelled = TRUE; |
| |
| G_LOCK (fam_connection); |
| /* We need to queue up incoming messages to avoid blocking on write |
| * if there are many monitors being canceled */ |
| fam_do_iter_unlocked (); |
| |
| if (fam_connection == NULL) |
| { |
| G_UNLOCK (fam_connection); |
| return FALSE; |
| } |
| |
| FAMCancelMonitor (fam_connection, &sub->request); |
| |
| G_UNLOCK (fam_connection); |
| |
| return TRUE; |
| } |
| |
| void |
| _fam_sub_free (fam_sub* sub) |
| { |
| g_free (sub->pathname); |
| g_free (sub); |
| } |
| |