degesch: allow executing a command when registered

To authenticate with NickServ or whatever.

degesch.c

@@ -1560,6 +1560,9 @@ static struct config_schema g_config_server[] =
 	  .comment   = "Channels to join on start",
 	  .type      = CONFIG_ITEM_STRING_ARRAY,
 	  .validate  = config_validate_nonjunk_string },
+	{ .name      = "command",
+	  .comment   = "Command to execute after a successful connect",
+	  .type      = CONFIG_ITEM_STRING },
 	{ .name      = "reconnect",
 	  .comment   = "Whether to reconnect on error",
 	  .type      = CONFIG_ITEM_BOOLEAN,
@@ -5574,6 +5577,9 @@ irc_try_parse_welcome_for_userhost (struct server *s, const char *m)
 	str_vector_free (&v);
 }
 
+static bool process_input_utf8
+	(struct app_context *, struct buffer *, char *, int);
+
 static void
 irc_on_registered (struct server *s, const char *nickname)
 {
@@ -5587,6 +5593,16 @@ irc_on_registered (struct server *s, const char *nickname)
 	// XXX: we can also use WHOIS if it's not supported (optional by RFC 2812)
 	irc_send (s, "USERHOST %s", s->irc_user->nickname);
 
+	const char *command = get_config_string (s->config, "command");
+	if (command)
+	{
+		log_server_debug (s, "Executing \"#s\"", command);
+
+		char *copy = xstrdup (command);
+		process_input_utf8 (s->ctx, s->buffer, copy, 0);
+		free (copy);
+	}
+
 	// TODO: split autojoin at commas and make a joined set with regular rejoins
 	const char *autojoin = get_config_string (s->config, "autojoin");
 	if (autojoin)
@@ -8012,8 +8028,8 @@ init_user_command_map (struct str_map *map)
 }
 
 static bool
-process_user_command
-	(struct app_context *ctx, const char *command_name, char *input)
+process_user_command (struct app_context *ctx, struct buffer *buffer,
+	const char *command_name, char *input)
 {
 	static bool initialized = false;
 	static struct str_map map;
@@ -8029,7 +8045,7 @@ process_user_command
 	struct handler_args args =
 	{
 		.ctx = ctx,
-		.buffer = ctx->current_buffer,
+		.buffer = buffer,
 		.arguments = input,
 	};
 
@@ -8146,9 +8162,9 @@ send_message_to_target (struct server *s,
 }
 
 static void
-send_message_to_current_buffer (struct app_context *ctx, char *message)
+send_message_to_buffer (struct app_context *ctx, struct buffer *buffer,
+	char *message)
 {
-	struct buffer *buffer = ctx->current_buffer;
 	hard_assert (buffer != NULL);
 
 	switch (buffer->type)
@@ -8167,31 +8183,31 @@ send_message_to_current_buffer (struct app_context *ctx, char *message)
 	}
 }
 
-static bool process_input_utf8 (struct app_context *, char *, int);
-
 static bool
-process_alias (struct app_context *ctx, struct str_vector *commands, int level)
+process_alias (struct app_context *ctx, struct buffer *buffer,
+	struct str_vector *commands, int level)
 {
 	for (size_t i = 0; i < commands->len; i++)
 		log_global_debug (ctx, "Alias expanded to: ###d: \"#s\"",
 			(int) i, commands->vector[i]);
 	for (size_t i = 0; i < commands->len; i++)
-		if (!process_input_utf8 (ctx, commands->vector[i], ++level))
+		if (!process_input_utf8 (ctx, buffer, commands->vector[i], ++level))
 			return false;
 	return true;
 }
 
 static bool
-process_input_utf8 (struct app_context *ctx, char *input, int alias_level)
+process_input_utf8 (struct app_context *ctx, struct buffer *buffer,
+	char *input, int alias_level)
 {
 	if (*input != '/' || *++input == '/')
 	{
-		send_message_to_current_buffer (ctx, input);
+		send_message_to_buffer (ctx, buffer, input);
 		return true;
 	}
 
 	char *name = cut_word (&input);
-	if (process_user_command (ctx, name, input))
+	if (process_user_command (ctx, buffer, name, input))
 		return true;
 
 	struct str_vector commands;
@@ -8203,7 +8219,7 @@ process_input_utf8 (struct app_context *ctx, char *input, int alias_level)
 	else if (alias_level != 0)
 		log_global_error (ctx, "#s: /#s", "Aliases can't nest", name);
 	else
-		result = process_alias (ctx, &commands, alias_level);
+		result = process_alias (ctx, buffer, &commands, alias_level);
 
 	str_vector_free (&commands);
 	return result;
@@ -8216,7 +8232,7 @@ process_input (struct app_context *ctx, char *user_input)
 	if (!(input = iconv_xstrdup (ctx->term_to_utf8, user_input, -1, NULL)))
 		print_error ("character conversion failed for `%s'", "user input");
 	else
-		(void) process_input_utf8 (ctx, input, 0);
+		(void) process_input_utf8 (ctx, ctx->current_buffer, input, 0);
 	free (input);
 }