Function configCommand

app/redis-6.2.6/src/config.c:2578–2624

 *----------------------------------------------------------------------------*/

void configCommand(client *c) {
    /* Only allow CONFIG GET while loading. */
    if (server.loading && strcasecmp(c->argv[1]->ptr,"get")) {
        addReplyError(c,"Only CONFIG GET is allowed during loading");
        return;
    }

    if (c->argc == 2 && !strcasecmp(c->argv[1]->ptr,"help")) {
        const char *help[] = {
"GET <pattern>",
"    Return parameters matching the glob-like <pattern> and their values.",
"SET <directive> <value>",
"    Set the configuration <directive> to <value>.",
"RESETSTAT",
"    Reset statistics reported by the INFO command.",
"REWRITE",
"    Rewrite the configuration file.",
NULL
        };

        addReplyHelp(c, help);
    } else if (!strcasecmp(c->argv[1]->ptr,"set") && c->argc == 4) {
        configSetCommand(c);
    } else if (!strcasecmp(c->argv[1]->ptr,"get") && c->argc == 3) {
        configGetCommand(c);
    } else if (!strcasecmp(c->argv[1]->ptr,"resetstat") && c->argc == 2) {
        resetServerStats();
        resetCommandTableStats();
        resetErrorTableStats();
        addReply(c,shared.ok);
    } else if (!strcasecmp(c->argv[1]->ptr,"rewrite") && c->argc == 2) {
        if (server.configfile == NULL) {
            addReplyError(c,"The server is running without a config file");
            return;
        }
        if (rewriteConfig(server.configfile, 0) == -1) {
            serverLog(LL_WARNING,"CONFIG REWRITE failed: %s", strerror(errno));
            addReplyErrorFormat(c,"Rewriting config file: %s", strerror(errno));
        } else {
            serverLog(LL_WARNING,"CONFIG REWRITE executed with success.");
            addReply(c,shared.ok);
        }
    } else {
        addReplySubcommandSyntaxError(c);
        return;
    }
}