Function configGetCommand

app/redis-6.2.6/src/config.c:920–1050

} while(0)

void configGetCommand(client *c) {
    robj *o = c->argv[2];
    void *replylen = addReplyDeferredLen(c);
    char *pattern = o->ptr;
    char buf[128];
    int matches = 0;
    serverAssertWithInfo(c,o,sdsEncodedObject(o));

    /* Iterate the configs that are standard */
    for (standardConfig *config = configs; config->name != NULL; config++) {
        if (stringmatch(pattern,config->name,1)) {
            addReplyBulkCString(c,config->name);
            config->interface.get(c,config->data);
            matches++;
        }
        if (config->alias && stringmatch(pattern,config->alias,1)) {
            addReplyBulkCString(c,config->alias);
            config->interface.get(c,config->data);
            matches++;
        }
    }

    /* String values */
    config_get_string_field("logfile",server.logfile);

    /* Numerical values */
    config_get_numerical_field("watchdog-period",server.watchdog_period);

    /* Everything we can't handle with macros follows. */

    if (stringmatch(pattern,"dir",1)) {
        char buf[1024];

        if (getcwd(buf,sizeof(buf)) == NULL)
            buf[0] = '\0';

        addReplyBulkCString(c,"dir");
        addReplyBulkCString(c,buf);
        matches++;
    }
    if (stringmatch(pattern,"save",1)) {
        sds buf = sdsempty();
        int j;

        for (j = 0; j < server.saveparamslen; j++) {
            buf = sdscatprintf(buf,"%jd %d",
                    (intmax_t)server.saveparams[j].seconds,
                    server.saveparams[j].changes);
            if (j != server.saveparamslen-1)
                buf = sdscatlen(buf," ",1);
        }
        addReplyBulkCString(c,"save");
        addReplyBulkCString(c,buf);
        sdsfree(buf);
        matches++;
    }
    if (stringmatch(pattern,"client-output-buffer-limit",1)) {
        sds buf = sdsempty();