Function rdbSaveInfoAuxFields

src/rdb.cpp:1203–1238

Save a few default AUX fields with information about the RDB generated. */

/* Save a few default AUX fields with information about the RDB generated. */
int rdbSaveInfoAuxFields(rio *rdb, int rdbflags, rdbSaveInfo *rsi) {
    int redis_bits = (sizeof(void*) == 8) ? 64 : 32;
    int aof_preamble = (rdbflags & RDBFLAGS_AOF_PREAMBLE) != 0;

    /* Add a few fields about the state when the RDB was created. */
    if (rdbSaveAuxFieldStrStr(rdb,"redis-ver",KEYDB_REAL_VERSION) == -1) return -1;
    if (rdbSaveAuxFieldStrInt(rdb,"redis-bits",redis_bits) == -1) return -1;
    if (rdbSaveAuxFieldStrInt(rdb,"ctime",time(NULL)) == -1) return -1;
    if (rdbSaveAuxFieldStrInt(rdb,"used-mem",zmalloc_used_memory()) == -1) return -1;

    /* Handle saving options that generate aux fields. */
    if (rsi) {
        if (rdbSaveAuxFieldStrInt(rdb,"repl-stream-db",rsi->repl_stream_db)
            == -1) return -1;
        if (rdbSaveAuxFieldStrStr(rdb,"repl-id",rsi->repl_id)
            == -1) return -1;
        if (rdbSaveAuxFieldStrInt(rdb,"repl-offset",rsi->master_repl_offset)
            == -1) return -1;
        if (g_pserver->fActiveReplica) {
            sdsstring val = sdsstring(sdsempty());

            for (auto &msi : rsi->vecmastersaveinfo) {
                if (msi.masterhost == nullptr)
                    continue;
                val = val.catfmt("%s:%I:%s:%i:%i;", msi.master_replid,
                    msi.master_initial_offset,
                    msi.masterhost.get(),
                    msi.masterport,
                    msi.selected_db);
            }
            if (rdbSaveAuxFieldStrStr(rdb, "repl-masters",val.get()) == -1) return -1;
        }
    }
    if (rdbSaveAuxFieldStrInt(rdb,"aof-preamble",aof_preamble) == -1) return -1;
    return 1;
}

int saveKey(rio *rdb, int flags, size_t *processed, const char *keystr, robj_roptr o)
{