Function db_command

freebsd/ddb/db_command.c:353–506

}

static void
db_command(struct command **last_cmdp, struct command_table *cmd_table,
    int dopager)
{
	struct command	*cmd = NULL;
	int		t;
	char		modif[TOK_STRING_SIZE];
	db_expr_t	addr, count;
	bool		have_addr = false;
	int		result;

	t = db_read_token();
	if (t == tEOL) {
	    /* empty line repeats last command, at 'next' */
	    cmd = *last_cmdp;
	    addr = (db_expr_t)db_next;
	    have_addr = false;
	    count = 1;
	    modif[0] = '\0';
	}
	else if (t == tEXCL) {
	    db_fncall((db_expr_t)0, (bool)false, (db_expr_t)0, (char *)0);
	    return;
	}
	else if (t != tIDENT) {
	    db_printf("Unrecognized input; use \"help\" "
	        "to list available commands\n");
	    db_flush_lex();
	    return;
	}
	else {
	    /*
	     * Search for command
	     */
	    while (cmd_table) {
		result = db_cmd_search(db_tok_string,
				       cmd_table,
				       &cmd);
		switch (result) {
		    case CMD_NONE:
			db_printf("No such command; use \"help\" "
			    "to list available commands\n");
			db_flush_lex();
			return;
		    case CMD_AMBIGUOUS:
			db_printf("Ambiguous\n");
			db_flush_lex();
			return;
		    case CMD_HELP:
			if (cmd_table == &db_cmd_table) {
			    db_printf("This is ddb(4), the kernel debugger; "
			        "see https://man.FreeBSD.org/ddb/4 for help.\n");
			    db_printf("Use \"bt\" for backtrace, \"dump\" for "
			        "kernel core dump, \"reset\" to reboot.\n");
			    db_printf("Available commands:\n");
			}
			db_cmd_list(cmd_table);
			db_flush_lex();