static void
ih_not_missing_callback (inotify_sub *sub)
{
gint now = g_get_monotonic_time ();
g_file_monitor_source_handle_event (sub->user_data, G_FILE_MONITOR_EVENT_CREATED,
sub->filename, NULL, NULL, now);
g_file_monitor_source_handle_event (sub->user_data, G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT,
sub->filename, NULL, NULL, now);
}
/**
* handle_overwritten:
* @data: a pointer to user data (#handle_context).
* @path: file name of the overwritten file.
* @node: inode number of the overwritten file.
*
* A callback function for the directory diff calculation routine,
* produces G_FILE_MONITOR_EVENT_DELETED/CREATED event pair when
* an overwrite occurs in the directory (see dep-list for details).
**/
static void
handle_overwritten (void *udata, const char *path, ino_t inode)
{
handle_ctx *ctx = NULL;
(void) inode;
ctx = (handle_ctx *) udata;
g_assert (udata != NULL);
g_assert (ctx->sub != NULL);
g_assert (ctx->source != NULL);
g_file_monitor_source_handle_event (ctx->source, G_FILE_MONITOR_EVENT_DELETED,
path, NULL, NULL, g_get_monotonic_time ());
g_file_monitor_source_handle_event (ctx->source, G_FILE_MONITOR_EVENT_CREATED,
path, NULL, NULL, g_get_monotonic_time ());
}
/**
* handle_moved:
* @udata: a pointer to user data (#handle_context).
* @from_path: file name of the source file.
* @from_inode: inode number of the source file.
* @to_path: file name of the replaced file.
* @to_inode: inode number of the replaced file.
*
* A callback function for the directory diff calculation routine,
* produces G_FILE_MONITOR_EVENT_RENAMED event on a move.
**/
static void
handle_moved (void *udata,
const char *from_path,
ino_t from_inode,
const char *to_path,
ino_t to_inode)
{
handle_ctx *ctx = NULL;
(void) from_inode;
(void) to_inode;
ctx = (handle_ctx *) udata;
g_assert (udata != NULL);
g_assert (ctx->sub != NULL);
g_assert (ctx->source != NULL);
g_file_monitor_source_handle_event (ctx->source, G_FILE_MONITOR_EVENT_RENAMED,
from_path, to_path, NULL, g_get_monotonic_time ());
}
static gboolean
g_fam_file_monitor_callback (gint fd,
GIOCondition condition,
gpointer user_data)
{
gint64 now = g_source_get_time (fam_source);
g_mutex_lock (&fam_lock);
while (FAMPending (&fam_connection))
{
const gchar *child;
FAMEvent ev;
if (FAMNextEvent (&fam_connection, &ev) != 1)
{
/* The daemon died. We're in a really bad situation now
* because we potentially have a bunch of request structures
* outstanding which no longer make any sense to anyone.
*
* The best thing that we can do is do nothing. Notification
* won't work anymore for this process.
*/
g_mutex_unlock (&fam_lock);
g_warning ("Lost connection to FAM (file monitoring) service. Expect no further file monitor events.");
return FALSE;
}
/* We expect ev.filename to be a relative path for children in a
* monitored directory, and an absolute path for a monitored file
* or the directory itself.
*/
if (ev.filename[0] != '/')
child = ev.filename;
else
child = NULL;
switch (ev.code)
{
case FAMAcknowledge:
g_source_unref (ev.userdata);
break;
case FAMChanged:
g_file_monitor_source_handle_event (ev.userdata, G_FILE_MONITOR_EVENT_CHANGED, child, NULL, NULL, now);
break;
case FAMDeleted:
g_file_monitor_source_handle_event (ev.userdata, G_FILE_MONITOR_EVENT_DELETED, child, NULL, NULL, now);
break;
case FAMCreated:
g_file_monitor_source_handle_event (ev.userdata, G_FILE_MONITOR_EVENT_CREATED, child, NULL, NULL, now);
break;
default:
/* unknown type */
break;
}
}
g_mutex_unlock (&fam_lock);
return TRUE;
}
static gboolean
ih_event_callback (ik_event_t *event,
inotify_sub *sub,
gboolean file_event)
{
gboolean interesting;
g_assert (!file_event); /* XXX hardlink support */
if (event->mask & IN_MOVE)
{
/* We either have a rename (in the same directory) or a move
* (between different directories).
*/
if (event->pair && event->pair->wd == event->wd)
{
/* this is a rename */
interesting = g_file_monitor_source_handle_event (sub->user_data, G_FILE_MONITOR_EVENT_RENAMED,
event->name, event->pair->name, NULL, event->timestamp);
}
else
{
GFile *other;
if (event->pair)
{
const char *parent_dir;
gchar *fullpath;
parent_dir = _ip_get_path_for_wd (event->pair->wd);
fullpath = _ih_fullpath_from_event (event->pair, parent_dir, NULL);
other = g_file_new_for_path (fullpath);
g_free (fullpath);
}
else
other = NULL;
/* this is either an incoming or outgoing move */
interesting = g_file_monitor_source_handle_event (sub->user_data, ih_mask_to_EventFlags (event->mask),
event->name, NULL, other, event->timestamp);
if (other)
g_object_unref (other);
}
}
else
/* unpaired event -- no 'other' field */
interesting = g_file_monitor_source_handle_event (sub->user_data, ih_mask_to_EventFlags (event->mask),
event->name, NULL, NULL, event->timestamp);
if (event->mask & IN_CREATE)
{
const gchar *parent_dir;
gchar *fullname;
struct stat buf;
gint s;
/* The kernel reports IN_CREATE for two types of events:
*
* - creat(), in which case IN_CLOSE_WRITE will come soon; or
* - link(), mkdir(), mknod(), etc., in which case it won't
*
* We can attempt to detect the second case and send the
* CHANGES_DONE immediately so that the user isn't left waiting.
*
* The detection for link() is not 100% reliable since the link
* count could be 1 if the original link was deleted or if
* O_TMPFILE was being used, but in that case the virtual
* CHANGES_DONE will be emitted to close the loop.
*/
parent_dir = _ip_get_path_for_wd (event->wd);
fullname = _ih_fullpath_from_event (event, parent_dir, NULL);
s = stat (fullname, &buf);
g_free (fullname);
/* if it doesn't look like the result of creat()... */
if (s != 0 || !S_ISREG (buf.st_mode) || buf.st_nlink != 1)
g_file_monitor_source_handle_event (sub->user_data, G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT,
event->name, NULL, NULL, event->timestamp);
}
return interesting;
}
/**
* process_kqueue_notifications:
* @gioc: unused.
* @cond: unused.
* @data: unused.
*
* Processes notifications, coming from the kqueue thread.
*
* Reads notifications from the command file descriptor, emits the
* "changed" event on the appropriate monitor.
*
* A typical GIO Channel callback function.
*
* Returns: %TRUE
**/
static gboolean
process_kqueue_notifications (GIOChannel *gioc,
GIOCondition cond,
gpointer data)
{
struct kqueue_notification n;
kqueue_sub *sub = NULL;
GFileMonitorSource *source = NULL;
GFileMonitorEvent mask = 0;
g_assert (kqueue_socket_pair[0] != -1);
if (!_ku_read (kqueue_socket_pair[0], &n, sizeof (struct kqueue_notification)))
{
KH_W ("Failed to read a kqueue notification, error %d", errno);
return TRUE;
}
G_LOCK (hash_lock);
sub = (kqueue_sub *) g_hash_table_lookup (subs_hash_table, GINT_TO_POINTER (n.fd));
G_UNLOCK (hash_lock);
if (sub == NULL)
{
KH_W ("Got a notification for a deleted or non-existing subscription %d",
n.fd);
return TRUE;
}
source = sub->user_data;
g_assert (source != NULL);
if (n.flags & (NOTE_DELETE | NOTE_REVOKE))
{
if (sub->deps)
{
dl_free (sub->deps);
sub->deps = NULL;
}
_km_add_missing (sub);
if (!(n.flags & NOTE_REVOKE))
{
/* Note that NOTE_REVOKE is issued by the kqueue thread
* on EV_ERROR kevent. In this case, a file descriptor is
* already closed from the kqueue thread, no need to close
* it manually */
_kh_cancel_sub (sub);
}
}
if (sub->is_dir && n.flags & (NOTE_WRITE | NOTE_EXTEND))
{
_kh_dir_diff (sub, source);
n.flags &= ~(NOTE_WRITE | NOTE_EXTEND);
}
if (n.flags)
{
gboolean done = FALSE;
mask = convert_kqueue_events_to_gio (n.flags, &done);
if (done == TRUE)
g_file_monitor_source_handle_event (source, mask, NULL, NULL, NULL, g_get_monotonic_time ());
}
return TRUE;
}
