for {
		select {
		case err := <-globalHTTPServerErrorCh:
			shutdownLogIf(context.Background(), err)
			exit(stopProcess())
		case osSignal := <-globalOSSignalCh:
			logger.Info("Exiting on signal: %s", strings.ToUpper(osSignal.String()))
			daemon.SdNotify(false, daemon.SdNotifyStopping)
			exit(stopProcess())
		case signal := <-globalServiceSignalCh:
			switch signal {
			case serviceRestart:

	return !c.Is(ChecksumInvalid) && !c.Is(ChecksumNone)
}

// NewChecksumType returns a checksum type based on the algorithm string.
func NewChecksumType(alg string) ChecksumType {
	switch strings.ToUpper(alg) {
	case "CRC32":
		return ChecksumCRC32
	case "CRC32C":
		return ChecksumCRC32C
	case "SHA1":
		return ChecksumSHA1
	case "SHA256":
		return ChecksumSHA256
	case "":
		return ChecksumNone

		return true
	}
	if _, ok := h[xhttp.AmzServerSideEncryption]; ok {
		// Return only true if the SSE header is specified and does not contain the SSE-S3 value
		return strings.ToUpper(h.Get(xhttp.AmzServerSideEncryption)) != xhttp.AmzEncryptionAES
	}
	return false
}

// ParseHTTP parses the SSE-KMS headers and returns the SSE-KMS key ID
// and the KMS context on success.

	config.Lock()
	defer config.Unlock()

	// check if tier name is in all caps
	tierName := tier.Name
	if tierName != strings.ToUpper(tierName) {
		return errTierNameNotUppercase
	}

	// check if tier name already in use
	if _, exists := config.isTierNameInUse(tierName); exists {
		return errTierAlreadyExists
	}

		MTime:     opts.MTime,
		VersionID: opts.VersionID,
		EvalMetadataFn: func(oi *ObjectInfo, gerr error) (ReplicateDecision, error) {
			oi.UserDefined[strings.ToLower(xhttp.AmzObjectLockLegalHold)] = strings.ToUpper(string(legalHold.Status))
			oi.UserDefined[ReservedMetadataPrefixLower+ObjectLockLegalHoldTimestamp] = UTCNow().Format(time.RFC3339Nano)

}

func getEnvVarName(subSys, target, param string) string {
	if target == Default {
		return fmt.Sprintf("%s%s%s%s", EnvPrefix, strings.ToUpper(subSys), Default, strings.ToUpper(param))
	}

	return fmt.Sprintf("%s%s%s%s%s%s", EnvPrefix, strings.ToUpper(subSys), Default, strings.ToUpper(param),
		Default, target)
}

var resolvableSubsystems = set.CreateStringSet(IdentityOpenIDSubSys, IdentityLDAPSubSys, PolicyPluginSubSys)

func (r RetMode) Valid() bool {
	switch r {
	case RetGovernance, RetCompliance:
		return true
	}
	return false
}

func parseRetMode(modeStr string) (mode RetMode) {
	switch strings.ToUpper(modeStr) {
	case "GOVERNANCE":
		mode = RetGovernance
	case "COMPLIANCE":
		mode = RetCompliance
	}
	return mode
}

// LegalHoldStatus - object legal hold status.
type LegalHoldStatus string

	switch {
	case e.ConditionRHS.Compare != nil:
		cmpRight, cmpRErr := e.ConditionRHS.Compare.Operand.evalNode(r, tableAlias)
		if cmpRErr != nil {
			return nil, cmpRErr
		}

		b, err := opVal.compareOp(strings.ToUpper(e.ConditionRHS.Compare.Operator), cmpRight)
		return FromBool(b), err

	case e.ConditionRHS.Between != nil:
		return e.ConditionRHS.Between.evalBetweenNode(r, opVal, tableAlias)

	case e.ConditionRHS.Like != nil:

	limitStr := r.Form.Get("limit")
	limitLines, err := strconv.Atoi(limitStr)
	if err != nil {
		limitLines = 10
	}

	logKind := madmin.LogKind(strings.ToUpper(r.Form.Get("logType"))).LogMask()
	if logKind == 0 {
		logKind = madmin.LogMaskAll
	}

	// Avoid reusing tcp connection if read timeout is hit
	// This is needed to make r.Context().Done() work as