Function evalMode

app/redis-6.2.6/src/redis-cli.c:2313–2394

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

static int evalMode(int argc, char **argv) {
    sds script = NULL;
    FILE *fp;
    char buf[1024];
    size_t nread;
    char **argv2;
    int j, got_comma, keys;
    int retval = REDIS_OK;

    while(1) {
        if (config.eval_ldb) {
            printf(
            "Lua debugging session started, please use:\n"
            "quit    -- End the session.\n"
            "restart -- Restart the script in debug mode again.\n"
            "help    -- Show Lua script debugging commands.\n\n"
            );
        }

        sdsfree(script);
        script = sdsempty();
        got_comma = 0;
        keys = 0;

        /* Load the script from the file, as an sds string. */
        fp = fopen(config.eval,"r");
        if (!fp) {
            fprintf(stderr,
                "Can't open file '%s': %s\n", config.eval, strerror(errno));
            exit(1);
        }
        while((nread = fread(buf,1,sizeof(buf),fp)) != 0) {
            script = sdscatlen(script,buf,nread);
        }
        fclose(fp);

        /* If we are debugging a script, enable the Lua debugger. */
        if (config.eval_ldb) {
            redisReply *reply = redisCommand(context,
                    config.eval_ldb_sync ?
                    "SCRIPT DEBUG sync": "SCRIPT DEBUG yes");
            if (reply) freeReplyObject(reply);
        }

        /* Create our argument vector */
        argv2 = zmalloc(sizeof(sds)*(argc+3));
        argv2[0] = sdsnew("EVAL");
        argv2[1] = script;
        for (j = 0; j < argc; j++) {
            if (!got_comma && argv[j][0] == ',' && argv[j][1] == 0) {
                got_comma = 1;
                continue;
            }
            argv2[j+3-got_comma] = sdsnew(argv[j]);
            if (!got_comma) keys++;
        }
        argv2[2] = sdscatprintf(sdsempty(),"%d",keys);