/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 2; tab-width: 8 -*- */ /* inotify-helper.c - GVFS Monitor based on inotify. Copyright (C) 2007 John McCutchan The Gnome Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The Gnome 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the Gnome Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. Authors: John McCutchan */ #include "config.h" #include #include #include #include /* Just include the local header to stop all the pain */ #include "local_inotify.h" #if 0 #ifdef HAVE_SYS_INOTIFY_H /* We don't actually include the libc header, because there has been * problems with libc versions that was built without inotify support. * Instead we use the local version. */ #include "local_inotify.h" #elif defined (HAVE_LINUX_INOTIFY_H) #include #endif #endif #include #include #include #include "inotify-helper.h" #include "inotify-missing.h" #include "inotify-path.h" #include "inotify-diag.h" #include "gioalias.h" static gboolean ih_debug_enabled = FALSE; #define IH_W if (ih_debug_enabled) g_warning static void ih_event_callback (ik_event_t *event, inotify_sub *sub); static void ih_not_missing_callback (inotify_sub *sub); /* We share this lock with inotify-kernel.c and inotify-missing.c * * inotify-kernel.c takes the lock when it reads events from * the kernel and when it processes those events * * inotify-missing.c takes the lock when it is scanning the missing * list. * * We take the lock in all public functions */ G_GNUC_INTERNAL G_LOCK_DEFINE (inotify_lock); static GFileMonitorEvent ih_mask_to_EventFlags (guint32 mask); /** * _ih_startup: * * Initializes the inotify backend. This must be called before * any other functions in this module. * * Return value: #TRUE if initialization succeeded, #FALSE otherwise */ gboolean _ih_startup (void) { static gboolean initialized = FALSE; static gboolean result = FALSE; G_LOCK (inotify_lock); if (initialized == TRUE) { G_UNLOCK (inotify_lock); return result; } result = _ip_startup (ih_event_callback); if (!result) { g_warning ("Could not initialize inotify\n"); G_UNLOCK (inotify_lock); return FALSE; } _im_startup (ih_not_missing_callback); _id_startup (); IH_W ("started gvfs inotify backend\n"); initialized = TRUE; G_UNLOCK (inotify_lock); return TRUE; } /** * Adds a subscription to be monitored. */ gboolean _ih_sub_add (inotify_sub * sub) { G_LOCK (inotify_lock); if (!_ip_start_watching (sub)) _im_add (sub); G_UNLOCK (inotify_lock); return TRUE; } /** * Cancels a subscription which was being monitored. */ gboolean _ih_sub_cancel (inotify_sub * sub) { G_LOCK (inotify_lock); if (!sub->cancelled) { IH_W ("cancelling %s\n", sub->dirname); sub->cancelled = TRUE; _im_rm (sub); _ip_stop_watching (sub); } G_UNLOCK (inotify_lock); return TRUE; } static void ih_event_callback (ik_event_t *event, inotify_sub *sub) { gchar *fullpath; GFileMonitorEvent eflags; GFile* parent; GFile* child; eflags = ih_mask_to_EventFlags (event->mask); parent = g_file_new_for_path (sub->dirname); if (event->name) fullpath = g_strdup_printf ("%s/%s", sub->dirname, event->name); else fullpath = g_strdup_printf ("%s/", sub->dirname); child = g_file_new_for_path (fullpath); g_free (fullpath); if (G_IS_DIRECTORY_MONITOR (sub->user_data)) { GDirectoryMonitor* monitor = G_DIRECTORY_MONITOR (sub->user_data); g_directory_monitor_emit_event (monitor, child, NULL, eflags); } else if (G_IS_FILE_MONITOR (sub->user_data)) { GFileMonitor* monitor = G_FILE_MONITOR (sub->user_data); g_file_monitor_emit_event (monitor, child, NULL, eflags); } g_object_unref (child); g_object_unref (parent); } static void ih_not_missing_callback (inotify_sub *sub) { gchar *fullpath; GFileMonitorEvent eflags; guint32 mask; GFile* parent; GFile* child; parent = g_file_new_for_path (sub->dirname); if (sub->filename) { fullpath = g_strdup_printf ("%s/%s", sub->dirname, sub->filename); g_warning ("Missing callback called fullpath = %s\n", fullpath); if (!g_file_test (fullpath, G_FILE_TEST_EXISTS)) { g_free (fullpath); return; } mask = IN_CREATE; } else { fullpath = g_strdup_printf ("%s", sub->dirname); mask = IN_CREATE|IN_ISDIR; } eflags = ih_mask_to_EventFlags (mask); child = g_file_new_for_path (fullpath); g_free (fullpath); if (G_IS_DIRECTORY_MONITOR (sub->user_data)) { GDirectoryMonitor* monitor = G_DIRECTORY_MONITOR (sub->user_data); g_directory_monitor_emit_event (monitor, child, NULL, eflags); } else if (G_IS_FILE_MONITOR (sub->user_data)) { GFileMonitor* monitor = G_FILE_MONITOR (sub->user_data); g_file_monitor_emit_event (monitor, child, NULL, eflags); } g_object_unref (child); g_object_unref (parent); } /* Transforms a inotify event to a GVFS event. */ static GFileMonitorEvent ih_mask_to_EventFlags (guint32 mask) { mask &= ~IN_ISDIR; switch (mask) { case IN_MODIFY: return G_FILE_MONITOR_EVENT_CHANGED; case IN_CLOSE_WRITE: return G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT; case IN_ATTRIB: return G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED; case IN_MOVE_SELF: case IN_MOVED_FROM: case IN_DELETE: case IN_DELETE_SELF: return G_FILE_MONITOR_EVENT_DELETED; case IN_CREATE: case IN_MOVED_TO: return G_FILE_MONITOR_EVENT_CREATED; case IN_UNMOUNT: return G_FILE_MONITOR_EVENT_UNMOUNTED; case IN_Q_OVERFLOW: case IN_OPEN: case IN_CLOSE_NOWRITE: case IN_ACCESS: case IN_IGNORED: default: return -1; } }