static void
log_writer_start_watches(LogWriter *self)
{
gint fd;
GIOCondition cond;
if (self->watches_running)
return;
log_proto_client_prepare(self->proto, &fd, &cond);
self->fd_watch.fd = fd;
if (self->pollable_state < 0)
{
if (is_file_regular(fd))
self->pollable_state = 0;
else
self->pollable_state = !iv_fd_register_try(&self->fd_watch);
}
else if (self->pollable_state > 0)
iv_fd_register(&self->fd_watch);
log_writer_update_watches(self);
self->watches_running = TRUE;
}
static void
control_connection_start_watches(ControlConnection *self, gint sock)
{
IV_FD_INIT(&self->control_io);
self->control_io.cookie = self;
self->control_io.fd = sock;
iv_fd_register_try(&self->control_io);
control_connection_update_watches(self);
}
static gboolean
_is_fd_pollable(gint fd)
{
struct iv_fd check_fd;
gboolean pollable;
IV_FD_INIT(&check_fd);
check_fd.fd = fd;
check_fd.cookie = NULL;
pollable = (iv_fd_register_try(&check_fd) == 0);
if (pollable)
iv_fd_unregister(&check_fd);
return pollable;
}
/* NOTE: the return value is only used during initialization, and it is not
* expected that it'd change once it returns success */
static gboolean
log_reader_start_watches(LogReader *self)
{
gint fd;
GIOCondition cond;
log_proto_prepare(self->proto, &fd, &cond);
if (self->options->follow_freq > 0)
{
/* follow freq specified (only the file source does that, go into timed polling */
/* NOTE: the fd may not be set here, as it may not have been opened yet */
iv_timer_register(&self->follow_timer);
}
else if (fd < 0)
{
msg_error("In order to poll non-yet-existing files, follow_freq() must be set",
NULL);
return FALSE;
}
else
{
/* we have an FD, it is possible to poll it, register it */
self->fd_watch.fd = fd;
if (self->pollable_state < 0)
{
if (iv_fd_register_try(&self->fd_watch) == 0)
self->pollable_state = 1;
else
self->pollable_state = 0;
}
else if (self->pollable_state > 0)
{
iv_fd_register(&self->fd_watch);
}
else
{
msg_error("Unable to determine how to monitor this fd, follow_freq() not set and it is not possible to poll it with the current ivykis polling method, try changing IV_EXCLUDE_POLL_METHOD environment variable",
evt_tag_int("fd", fd),
NULL);
return FALSE;
}
}
log_reader_update_watches(self);
return TRUE;
}
