// The zero value for Reader operates like a Reader of an empty slice.
type Reader struct {
	s        []byte
	i        int64 // current reading index
	prevRune int   // index of previous rune; or < 0
}

// Len returns the number of bytes of the unread portion of the
// slice.
func (r *Reader) Len() int {
	if r.i >= int64(len(r.s)) {
		return 0
	}
	return int(int64(len(r.s)) - r.i)
}

	// Current files
	EnvRootUserFile     = "MINIO_ROOT_USER_FILE"
	EnvRootPasswordFile = "MINIO_ROOT_PASSWORD_FILE"

	// Set all config environment variables from 'config.env'
	// if necessary. Overrides all previous settings and also
	// overrides all environment values passed from
	// 'podman run -e ENV=value'
	EnvConfigEnvFile = "MINIO_CONFIG_ENV_FILE"

	EnvBrowser    = "MINIO_BROWSER"
	EnvDomain     = "MINIO_DOMAIN"

	"github.com/minio/minio/internal/kms"
)

const (
	minioConfigPrefix = "config"
	minioConfigBucket = minioMetaBucket + SlashSeparator + minioConfigPrefix
	kvPrefix          = ".kv"

	// Captures all the previous SetKV operations and allows rollback.
	minioConfigHistoryPrefix = minioConfigPrefix + "/history"

	// MinIO configuration file.
	minioConfigFile = "config.json"
)

// journal only to process existing journal entries made from previous versions.
func (t *TierJournal) Init(ctx context.Context) error {
	for _, diskPath := range globalEndpoints.LocalDisksPaths() {
		t.diskPath = diskPath

		go t.deletePending(ctx)  // for existing journal entries from previous MinIO versions
		go t.processEntries(ctx) // for newer journal entries circa free-versions
		return nil
	}

	dst   chan [][]string // result of block decode
	err   error           // any error encountered will be set here
}

// Read - reads single record.
// Once Read is called the previous record should no longer be referenced.
func (r *Reader) Read(dst sql.Record) (sql.Record, error) {
	// If we have have any records left, return these before any error.
	for len(r.current) <= r.recordsRead {
		if r.err != nil {

			// that was previously preserved during PutObject() call
			// on a versioned bucket.
			s.moveToTrash(legacyDataPath, true, false)
		}
		if contextCanceled(ctx) {
			return res, ctx.Err()
		}
		if err = renameAll(srcDataPath, dstDataPath, skipParent); err != nil {
			if legacyPreserved {
				// Any failed rename calls un-roll previous transaction.

// Endpoint set represents parsed ellipses values, also provides
// methods to get the sets of endpoints.
type endpointSet struct {
	argPatterns []ellipses.ArgPattern
	endpoints   []string   // Endpoints saved from previous GetEndpoints().
	setIndexes  [][]uint64 // All the sets.
}

// Supported set sizes this is used to find the optimal
// single set size.
var setSizes = []uint64{2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}

	// value captured in current cycle
	Current float64

	// Used when system provides cumulative (since uptime) values
	// helps in calculating the current value by comparing the new
	// cumulative value with previous one
	Cumulative float64

	Max   float64
	Avg   float64
	Sum   float64
	Count uint64
}

func init() {
	interval := fmt.Sprintf("%ds", int(resourceMetricsCollectionInterval.Seconds()))

	"fmt"
	"io"
	"os"
	pathutil "path"
	"strings"
	"sync"
	"time"

	xioutil "github.com/minio/minio/internal/ioutil"
)

func renameAllBucketMetacache(epPath string) error {
	// Rename all previous `.minio.sys/buckets/<bucketname>/.metacache` to
	// to `.minio.sys/tmp/` for deletion.
	return readDirFn(pathJoin(epPath, minioMetaBucket, bucketMetaPrefix), func(name string, typ os.FileMode) error {
		if typ == os.ModeDir {

	if err != nil {
		return nil, fmt.Errorf("failed to resolve unix addr: %w", err)
	}
	// remove potentially existing address
	// Remove unix socket before use, if one is leftover from previous CNI restart
	if err := os.Remove(addr); err != nil && !os.IsNotExist(err) {
		// Anything other than "file not found" is an error.
		return nil, fmt.Errorf("failed to remove unix://%s: %w", addr, err)
	}