// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"bytes"
	"fmt"
	"os"
	"strings"
	"sync"
	"syscall"
	"unsafe"

	"golang.org/x/sys/unix"
)

func access(name string) error {
	if err := unix.Access(name, unix.F_OK); err != nil {
		return &os.PathError{Op: "lstat", Path: name, Err: err}
	}
	return nil
}

	if disk == nil {
		return errDiskNotFound
	}
	volumes := []string{
		minioMetaTmpDeletedBucket, // creates .minio.sys/tmp as well as .minio.sys/tmp/.trash
		minioMetaMultipartBucket,  // creates .minio.sys/multipart
		dataUsageBucket,           // creates .minio.sys/buckets
		minioConfigBucket,         // creates .minio.sys/config
	}
	// Attempt to create MinIO internal buckets.
	return disk.MakeVolBulk(context.TODO(), volumes...)
}

			// guess. Maybe retry later. See Issue 18117.
		}
		// For client requests, Request.ContentLength of 0
		// means either actually 0, or unknown. The only way
		// to explicitly say that the ContentLength is zero is
		// to set the Body to nil. But turns out too much code
		// depends on NewRequest returning a non-nil Body,
		// so we use a well-known ReadCloser variable instead

	if err != nil {
		return err
	}

	for _, bucket := range decomBuckets {
		z.HealBucket(ctx, bucket.Name, madmin.HealOpts{})
	}

	// Create .minio.sys/config, .minio.sys/buckets paths if missing,
	// this code is present to avoid any missing meta buckets on other
	// pools.
	for _, metaBucket := range []string{
		pathJoin(minioMetaBucket, minioConfigPrefix),

	//
	// 1. Remove the group from each user's list of memberships.
	// 2. Add the group to each member's list of memberships.
	//
	// This ensures that regardless of members being added or
	// removed, the cache stays current.
	cache.removeGroupFromMembershipsMap(group)
	cache.updateGroupMembershipsMap(group, &gi)
	cache.updatedAt = time.Now()
	return nil
}

	// of them are not local. This situation can never happen and
	// its only a possibility in orchestrated deployments with dynamic
	// DNS. Following code ensures that we treat if one of the endpoint
	// says its local for a given host - it is true for all endpoints
	// for the same host. Following code ensures that this assumption
	// is true and it works in all scenarios and it is safe to assume
	// for a given host.

		header, zerr := zip.FileInfoHeader(dummyFileInfo{
			name:    filename,
			size:    int64(sz),
			mode:    0o600,
			modTime: time.Now(),
			isDir:   false,
			sys:     nil,
		})
		if zerr == nil {
			header.Method = zip.Deflate
			zwriter, zerr := zipWriter.CreateHeader(header)
			if zerr == nil {
				io.Copy(zwriter, r)
			}
		}
	}

	Description     string         `json:"description"`
	MultipleTargets bool           `json:"multipleTargets"`
	KeysHelp        config.HelpKVS `json:"keysHelp"`
}

// GetHelp - returns help for sub-sys, a key for a sub-system or all the help.
func GetHelp(subSys, key string, envOnly bool) (Help, error) {
	if len(subSys) == 0 {
		return Help{KeysHelp: config.HelpSubSysMap[subSys]}, nil
	}

			wantResult: `{"_1":-12}`,
		},
		{
			name:       "date_diff_days",
			query:      `SELECT date_diff(day, '2010-01-01T23:00:00Z', '2010-01-02T01:00:00Z') FROM S3Object LIMIT 1`,
			wantResult: `{"_1":0}`,
		},
		{
			name:       "date_diff_days_one",
			query:      `SELECT date_diff(day, '2010-01-01T23:00:00Z', '2010-01-02T23:00:00Z') FROM S3Object LIMIT 1`,

	// StateShutdown is the state when the server has been shut down.
	// This will not be used under normal operation.
	StateShutdown

	// MaxDeadline is the maximum deadline allowed,
	// Approx 49 days.
	MaxDeadline = time.Duration(math.MaxUint32) * time.Millisecond
)

// ContextDialer is a dialer that can be used to dial a remote.
type ContextDialer func(ctx context.Context, network, address string) (net.Conn, error)