ZyklonB: cleanup not only wrt. timers
The code isn't async enough and needs some further changes.
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479da40a3d
commit
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180
zyklonb.c
180
zyklonb.c
@ -108,6 +108,8 @@ struct bot_context
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{
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struct str_map config; ///< User configuration
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regex_t *admin_re; ///< Regex to match our administrator
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bool reconnect; ///< Whether to reconnect on conn. fail.
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unsigned long reconnect_delay; ///< Reconnect delay in seconds
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int irc_fd; ///< Socket FD of the server
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struct str read_buffer; ///< Input yet to be processed
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@ -178,6 +180,7 @@ bot_context_free (struct bot_context *self)
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static void
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irc_shutdown (struct bot_context *ctx)
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{
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// TODO: set a timer after which we cut the connection?
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// Generally non-critical
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if (ctx->ssl)
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soft_assert (SSL_shutdown (ctx->ssl) != -1);
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@ -185,22 +188,31 @@ irc_shutdown (struct bot_context *ctx)
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soft_assert (shutdown (ctx->irc_fd, SHUT_WR) == 0);
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}
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static void
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initiate_quit (struct bot_context *ctx)
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{
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irc_shutdown (ctx);
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ctx->quitting = true;
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}
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static void
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try_finish_quit (struct bot_context *ctx)
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{
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if (!ctx->quitting)
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return;
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if (ctx->irc_fd == -1 && !ctx->plugins)
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if (ctx->quitting && ctx->irc_fd == -1 && !ctx->plugins)
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ctx->polling = false;
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}
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static bool plugin_zombify (struct plugin_data *);
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static void
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initiate_quit (struct bot_context *ctx)
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{
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// Initiate bringing down of the two things that block our shutdown:
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// a/ the IRC socket, b/ our child processes:
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for (struct plugin_data *plugin = ctx->plugins;
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plugin; plugin = plugin->next)
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plugin_zombify (plugin);
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if (ctx->irc_fd != -1)
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irc_shutdown (ctx);
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ctx->quitting = true;
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try_finish_quit (ctx);
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}
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static bool irc_send (struct bot_context *ctx,
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const char *format, ...) ATTRIBUTE_PRINTF (2, 3);
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@ -649,6 +661,8 @@ plugin_zombify (struct plugin_data *plugin)
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// remaining commands it attempts to send to us before it finally dies.
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str_map_set (&plugin->ctx->plugins_by_name, plugin->name, NULL);
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plugin->is_zombie = true;
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// TODO: wait a few seconds and then send SIGKILL to the plugin
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return true;
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}
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@ -1016,8 +1030,6 @@ plugin_unload (struct bot_context *ctx, const char *name, struct error **e)
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// TODO: add a `kill zombies' command to forcefully get rid of processes
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// that do not understand the request.
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// TODO: set a timeout before we go for a kill automatically (and if this
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// was a reload request, try to bring the plugin back up)
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return true;
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}
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@ -1162,6 +1174,9 @@ static void
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process_plugin_reload (struct bot_context *ctx,
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const struct irc_message *msg, const char *name)
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{
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// XXX: we might want to wait until the plugin terminates before we try
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// to reload it (so that it can save its configuration or whatever)
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// So far the only error that can occur is that the plugin hasn't been
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// loaded, which in this case doesn't really matter.
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plugin_unload (ctx, name, NULL);
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@ -1380,60 +1395,49 @@ start:
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return IRC_READ_ERROR;
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}
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static bool irc_connect (struct bot_context *ctx, struct error **e);
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static bool irc_connect (struct bot_context *, struct error **);
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static void irc_queue_reconnect (struct bot_context *);
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static void
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irc_try_reconnect (struct bot_context *ctx)
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irc_cancel_timers (struct bot_context *ctx)
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{
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if (!soft_assert (ctx->irc_fd == -1))
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return;
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ssize_t i;
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struct poller_timers *timers = &ctx->poller.timers;
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while ((i = poller_timers_find_by_data (timers, ctx)) != -1)
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poller_timers_remove_at_index (timers, i);
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}
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const char *reconnect_str = str_map_find (&ctx->config, "reconnect");
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hard_assert (reconnect_str != NULL); // We have a default value for this
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static void
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irc_on_reconnect_timeout (void *user_data)
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{
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struct bot_context *ctx = user_data;
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bool reconnect;
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if (!set_boolean_if_valid (&reconnect, reconnect_str))
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struct error *e = NULL;
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if (irc_connect (ctx, &e))
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{
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print_fatal ("invalid configuration value for `%s'", "recover");
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try_finish_quit (ctx);
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// TODO: inform plugins about the new connection
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return;
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}
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if (!reconnect)
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return;
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const char *delay_str = str_map_find (&ctx->config, "reconnect_delay");
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hard_assert (delay_str != NULL); // We have a default value for this
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print_error ("%s", e->message);
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error_free (e);
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irc_queue_reconnect (ctx);
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}
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unsigned long delay;
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if (!xstrtoul (&delay, delay_str, 10))
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{
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print_error ("invalid configuration value for `%s'",
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"reconnect_delay");
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delay = 0;
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}
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while (true)
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{
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// TODO: this would be better suited by a timeout event;
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// remember to update try_finish_quit() etc. to reflect this
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print_status ("trying to reconnect in %ld seconds...", delay);
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sleep (delay);
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struct error *e = NULL;
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if (irc_connect (ctx, &e))
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break;
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print_error ("%s", e->message);
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error_free (e);
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}
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// TODO: inform plugins about the new connection
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static void
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irc_queue_reconnect (struct bot_context *ctx)
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{
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hard_assert (ctx->irc_fd == -1);
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print_status ("trying to reconnect in %ld seconds...",
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ctx->reconnect_delay);
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poller_timers_add (&ctx->poller.timers,
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irc_on_reconnect_timeout, ctx, ctx->reconnect_delay * 1000);
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}
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static void
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on_irc_disconnected (struct bot_context *ctx)
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{
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// Get rid of the dead socket etc.
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// Get rid of the dead socket and related things
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if (ctx->ssl)
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{
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SSL_free (ctx->ssl);
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@ -1452,19 +1456,15 @@ on_irc_disconnected (struct bot_context *ctx)
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// TODO: inform plugins about the disconnect event
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// All of our timers have lost their meaning now
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irc_cancel_timers (ctx);
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if (ctx->quitting)
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{
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// Unload all plugins
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// TODO: wait for a few seconds and then send SIGKILL to all plugins
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for (struct plugin_data *plugin = ctx->plugins;
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plugin; plugin = plugin->next)
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plugin_zombify (plugin);
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try_finish_quit (ctx);
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return;
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}
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irc_try_reconnect (ctx);
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else if (!ctx->reconnect)
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initiate_quit (ctx);
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else
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irc_queue_reconnect (ctx);
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}
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static void
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@ -1484,13 +1484,9 @@ on_irc_timeout (void *user_data)
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}
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static void
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irc_reset_timeouts (struct bot_context *ctx)
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irc_reset_connection_timeouts (struct bot_context *ctx)
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{
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ssize_t i;
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struct poller_timers *timers = &ctx->poller.timers;
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while ((i = poller_timers_find_by_data (timers, ctx)) != -1)
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poller_timers_remove_at_index (timers, i);
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irc_cancel_timers (ctx);
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poller_timers_add (&ctx->poller.timers,
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on_irc_timeout, ctx, 3 * 60 * 1000);
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poller_timers_add (&ctx->poller.timers,
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@ -1544,7 +1540,7 @@ end:
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if (disconnected)
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on_irc_disconnected (ctx);
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else
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irc_reset_timeouts (ctx);
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irc_reset_connection_timeouts (ctx);
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}
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static bool
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@ -1585,7 +1581,7 @@ irc_connect (struct bot_context *ctx, struct error **e)
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// 3/ /* O_CLOEXEC */ But only if the QUIT message proves unreliable.
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poller_set (&ctx->poller, ctx->irc_fd, POLLIN,
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(poller_dispatcher_func) on_irc_readable, ctx);
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irc_reset_timeouts (ctx);
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irc_reset_connection_timeouts (ctx);
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irc_send (ctx, "NICK %s", nickname);
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irc_send (ctx, "USER %s 8 * :%s", username, realname);
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@ -1593,22 +1589,38 @@ irc_connect (struct bot_context *ctx, struct error **e)
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}
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static bool
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load_admin_regex (struct bot_context *ctx)
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parse_config (struct bot_context *ctx, struct error **e)
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{
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const char *reconnect_str = str_map_find (&ctx->config, "reconnect");
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hard_assert (reconnect_str != NULL); // We have a default value for this
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if (!set_boolean_if_valid (&ctx->reconnect, reconnect_str))
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{
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error_set (e, "invalid configuration value for `%s'", "reconnect");
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return false;
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}
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const char *delay_str = str_map_find (&ctx->config, "reconnect_delay");
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hard_assert (delay_str != NULL); // We have a default value for this
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if (!xstrtoul (&ctx->reconnect_delay, delay_str, 10))
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{
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error_set (e, "invalid configuration value for `%s'",
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"reconnect_delay");
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return false;
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}
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hard_assert (!ctx->admin_re);
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const char *admin = str_map_find (&ctx->config, "admin");
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if (!admin)
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return true;
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struct error *e = NULL;
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ctx->admin_re = regex_compile (admin, REG_EXTENDED | REG_NOSUB, &e);
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if (!e)
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struct error *error = NULL;
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ctx->admin_re = regex_compile (admin, REG_EXTENDED | REG_NOSUB, &error);
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if (!error)
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return true;
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print_error ("invalid configuration value for `%s': %s",
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"admin", e->message);
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error_free (e);
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error_set (e, "invalid configuration value for `%s': %s",
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"admin", error->message);
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error_free (error);
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return false;
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}
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@ -1618,10 +1630,13 @@ on_signal_pipe_readable (const struct pollfd *fd, struct bot_context *ctx)
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char *dummy;
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(void) read (fd->fd, &dummy, 1);
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// XXX: do we need to check if we have a connection?
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if (g_termination_requested && !ctx->quitting)
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{
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irc_send (ctx, "QUIT :Terminated by signal");
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// There may be a timer set to reconnect to the server
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irc_cancel_timers (ctx);
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if (ctx->irc_fd != -1)
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irc_send (ctx, "QUIT :Terminated by signal");
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initiate_quit (ctx);
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}
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@ -1769,9 +1784,8 @@ main (int argc, char *argv[])
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(poller_dispatcher_func) on_signal_pipe_readable, &ctx);
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plugin_load_all_from_config (&ctx);
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if (!load_admin_regex (&ctx))
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exit (EXIT_FAILURE);
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if (!irc_connect (&ctx, &e))
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if (!parse_config (&ctx, &e)
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|| !irc_connect (&ctx, &e))
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{
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print_error ("%s", e->message);
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error_free (e);
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