gocage/cmd/utils.go

package cmd

import (
	"os"
	"fmt"
	"log"
	"sort"
	"bufio"
	"errors"
	"os/exec"
	"reflect"
	"strings"
	"strconv"
)

/*****************************************************************************
*
* Command execution
*
*****************************************************************************/
func executeCommand(cmdline string) (string, error) {
    var cmd []string
    var out []byte
    var err error

    if gUseSudo {
        cmd = append(cmd, "sudo")
    }
    cs := strings.Split(cmdline, " ")

    cmd = append(cmd, cs...)

    if len (cmd) > 1 {
        out, err = exec.Command(cmd[0], cmd[1:]...).Output()
    } else {
        out, err = exec.Command(cmd[0]).Output()
    }

    return string(out), err
}


func executeCommandInJail(jail *Jail, cmdline string) (string, error) {
    var cmd []string

    if gUseSudo {
        cmd = append(cmd, "sudo")
    }

    cmd = append(cmd, "setfib")
    if len(jail.Config.Exec_fib) > 0 {
        cmd = append(cmd, jail.Config.Exec_fib)
    } else {
        cmd = append(cmd, "0")
    }

    cmd = append(cmd, "jexec", jail.InternalName)

    cs := strings.Split(cmdline, " ")
    cmd = append(cmd, cs...)

    out, err := exec.Command(cmd[0], cmd[1:]...).Output()

    return string(out), err
}

/*****************************************************************************
* Parse an fstab file, returning an array of Mount
*****************************************************************************/
func getFstab(path string) ([]Mount, error) {
	var mounts []Mount

	f, err := os.Open(path)
	if err != nil {
		return mounts, err
	}
	defer f.Close()

	scan := bufio.NewScanner(f)
	for scan.Scan() {
		res := strings.Fields(scan.Text())
		if len(res) != 6 {
			return mounts, fmt.Errorf("Incorrect format for fstab line %s", scan.Text())
		}
		freq, err := strconv.Atoi(res[4])
		if err != nil {
			return mounts, fmt.Errorf("Incorrect format for fstab line %s: Dump is not an integer\n", scan.Text())
		}
		pass, err := strconv.Atoi(res[5])
		if err != nil {
			return mounts, fmt.Errorf("Incorrect format for fstab line %s: Pass is not an integer\n", scan.Text())
		}
		m := Mount{
			Device     : res[0],
			Mountpoint : res[1],
			Type       : res[2],
			Options    : strings.Split(res[3], ","),
			Fs_Freq    : freq,
			Fs_Passno  : pass,
		}
		mounts = append(mounts, m)
	}
	
	return mounts, nil
}


/********************************************************************************
 * Get a specific jail source reference, to update properties after a range loop
 *******************************************************************************/
func getJailFromArray(internalName string, jarray []Jail) (*Jail, error) {
	for _, j := range jarray {
		if internalName == j.InternalName {
			return &j, nil
		}
	}
	return &Jail{}, errors.New("Jail not found")
}

/********************************************************************************
 * Recurse into structure, returning reflect.Kind of named field.
 *  Nested fields are named with a dot (ex "MyStruct.MyField")
 *******************************************************************************/
func getStructFieldKind(parentStruct interface{}, fieldName string) (reflect.Kind, string, error) {
    v := reflect.ValueOf(parentStruct)

    if v.Kind() == reflect.Ptr {
        v = v.Elem()
    }   

	// For debugging
    if false {
        for i := 0 ; i < v.NumField(); i++ {
            f := v.Field(i)
            if f.Kind() == reflect.String {
                fmt.Printf("%v=%v\n", v.Type().Field(i).Name, f.Interface())
            }   
        }   
    }   

    if strings.Contains(fieldName, ".") {
        fs := strings.Split(fieldName, ".")
        f := v.FieldByName(fs[0])
        if f.Kind() == reflect.Struct {
            return getStructFieldKind(f.Interface(), strings.Join(fs[1:], "."))
        } else {
            return reflect.Kind(0), fieldName, errors.New(fmt.Sprintf("%s is not a struct: %s\n", fs[0], f.Kind().String()))
        }   
    } else {
        f := v.FieldByName(fieldName)
        if f.IsValid() {
            return f.Kind(), fieldName, nil 
        } else {
            return reflect.Kind(0), fieldName, errors.New(fmt.Sprintf("Field not found: %s", fieldName))
        }   
    }   

    return reflect.Kind(0), fieldName, errors.New(fmt.Sprintf("Field not found: %s", fieldName))
}

/********************************************************************************
 * Display struct attributes name for a given struct.
 * Recurse into struct attributes of type struct
 * Used to show user jail properties
 *******************************************************************************/
func getStructFieldNames(parentStruct interface{}, result []string, prefix string) []string {
	v := reflect.ValueOf(parentStruct)
	
	for i := 0 ; i < v.NumField() ; i++ {
		if v.Type().Field(i).Type.Kind() == reflect.Struct {
			result = getStructFieldNames(v.Field(i).Interface(), result, v.Type().Field(i).Name)
		} else {
			if len(prefix) > 0 {
				result = append(result, fmt.Sprintf("%s.%s", prefix, v.Type().Field(i).Name))
			} else {
				result = append(result, v.Type().Field(i).Name)
			}
		}
	}
	
	return result
}

/********************************************************************************
 * Recurse into structure, returning reflect.Value of wanted field.
 * Nested fields are named with a dot (ex "MyStruct.MyField")
 *******************************************************************************/
func getStructFieldValue(parentStruct interface{}, fieldName string) (*reflect.Value, string, error) {
	v := reflect.ValueOf(parentStruct)
	
	// Get value while we're dealing with pointers
	for ; v.Kind() == reflect.Ptr ; v = v.Elem() {}
	
	if v.Kind() != reflect.Struct {
		return &v, fieldName, errors.New(fmt.Sprintf("parentStruct is not a struct! Kind: %s", v.Kind().String()))
	}
	
	typeOfV := v.Type()

	if false {
		for i := 0 ; i < v.NumField(); i++ {
			f := v.Field(i)
			if f.Kind() == reflect.String {
				fmt.Printf("%v=%v\n", v.Type().Field(i).Name, f.Interface())
			}
		}
	}
	
	var f reflect.Value
	var found bool
	
	fs := strings.Split(fieldName, ".")
	// Loop through properties
	for i, curF := range fs {
		found = false
		for j := 0 ; j < v.NumField() ; j++ {
			if typeOfV.Field(j).Name == curF {
				f = v.Field(j)
				found = true
				break
			}
		}
		if !found {
			return &v, fieldName, errors.New(fmt.Sprintf("Field not found: %s", fieldName))
		}
		
		for ; f.Kind() == reflect.Ptr ; f = f.Elem() {}
		
		/*fmt.Printf("v.kind() = %v\n", v.Kind().String())
		fmt.Printf("v = %v\n", v)
		fmt.Printf("f.kind() = %v\n", f.Kind().String())
		fmt.Printf("f = %v\n", f)*/
		
		// If this is the last loop, return result even if it's a struct
		// FIXME : What if we got interface?
		if f.Kind() != reflect.Struct && i < len(fs)-1 {
			if f.IsValid() {
				//fmt.Printf("Return f = %v of Kind %s\n", f, f.Kind().String())
				return &f, fieldName, nil
			} else {
				return &v, fieldName, errors.New(fmt.Sprintf("Field not found: %s", fieldName))
			}
		} else {
			v = f
			typeOfV = v.Type()
		}
	}
	
	return &v, fieldName, nil
}


/********************************************************************************
 * TODO : Replace by getStructFieldValue
 * Recurse into structure, returning reflect.Value of wanted field.
 *  Nested fields are named with a dot (ex "MyStruct.MyField")
 *******************************************************************************/
func getStructField(parentStruct interface{}, fieldName string) (reflect.Value, string) {
	v := reflect.ValueOf(parentStruct)
	
	if v.Kind() == reflect.Ptr {
		v = v.Elem()
	}
	
	if false {
		for i := 0 ; i < v.NumField(); i++ {
			f := v.Field(i)
			if f.Kind() == reflect.String {
				fmt.Printf("%v=%v\n", v.Type().Field(i).Name, f.Interface())
			}
		}
	}
	
	if strings.Contains(fieldName, ".") {
		fs := strings.Split(fieldName, ".")
		f := v.FieldByName(fs[0])
		if f.Kind() == reflect.Struct {
			return getStructField(f.Interface(), strings.Join(fs[1:], "."))
		} else {
			log.Fatalln(fmt.Sprintf("%s is not a struct: %s\n", fs[0], f.Kind().String()))
		}
	}
	
	return v, fieldName
}


/********************************************************************************
 * Pretty display of jails field
 *   Fields to show are given in a string array parameter
 *   Ex. : displayJails(["Name", "JID", "RootPath"])
*******************************************************************************/
func displayStructFields(jails []Jail, valsToDisplay []string) {
	/* A line is defined by :
	 *		Nr of fields
	 *		For each field :
	 *			Its name
	 *			Its max length
	 *			Its value
	 */
	type Field struct {
		Name	string
		MaxLen	int
		Value	string
	}
	
	type Line []Field
	
	type Output []Line
	var out Output
	
	//fmt.Printf("%d fields in a %d items structure\n", len(valsToDisplay), len(jails))
	
	// Browse structure to get max length and values
	for _, j := range jails {
		// Have to use a pointer, else reflect.Value.Elem() will panic : https://pkg.go.dev/reflect#Value.Elem
		tj := &j
		
		line := make([]Field, len(valsToDisplay))
		for i, f := range valsToDisplay {
			a, f := getStructField(tj, f)
			
			field := Field {
				Name: f,
			}
			if a.FieldByName(f).IsValid() {
				// For now this just contains this item length, will adjust later
				//  We need to divide length by number of items in string fields (because we can have more than 1 ip4_addr)
				if reflect.TypeOf(a.FieldByName(f).Interface()).Kind() == reflect.String {
					itnr := len(strings.Split(string(a.FieldByName(f).Interface().(string)), ","))
					field.MaxLen = len(fmt.Sprintf("%v", a.FieldByName(f).Interface())) / itnr
				} else {
					field.MaxLen = len(fmt.Sprintf("%v", a.FieldByName(f).Interface()))
				}
				field.Value = fmt.Sprintf("%v", a.FieldByName(f).Interface())
			} else {
				fmt.Printf("Invalid field name: %s\n", f)
			}
			line[i] = field
			
		}
		out = append(out, line)
	}
	
	if len(out) == 0 {
		fmt.Printf("Nothing to see here!\n")
		return
	}
	
	// Get real maximum length
	maxlen := make([]int, len(valsToDisplay))
	for i := 0; i< len(valsToDisplay); i++ {
		maxlen[i] = len(valsToDisplay[i])
	}
	for _, l := range out {
		for i, f := range l {
			if f.MaxLen > maxlen[i] {
				maxlen[i] = f.MaxLen
			}
		}
	}
	
	// Align maxlen to the real maximum length
	for io, l := range out {
		for ii, _ := range l {
			// We need to access slice by index if we want to modify content
			out[io][ii].MaxLen = maxlen[ii]
		}
	}
	
	totalLen := 0
	// For each field, add separator and 2 blank spaces 
	for _, f := range out[0] {
		totalLen += f.MaxLen + 3
	}
	// Then add starting delimiter 
	totalLen += 1
	
	Debug := false
	if Debug == true {
		for _, f := range out[0] {
			fmt.Printf("%s max length : %d\n", f.Name, f.MaxLen)
		}
	}
	
	// Lets draw things on the screen!
	// First, headers: 1st separator line
	for i, f := range out[0] {
		if i == 0 {	fmt.Printf("+")	}
		for i := 0 ; i < f.MaxLen+2 ; i++ {	fmt.Printf("=")	}
		fmt.Printf("+")
	}
	fmt.Printf("\n")
	
	
	//  Column names
	for i, f := range out[0] {
		if i == 0 {
			fmt.Printf("|")
		}
		/* Use vlsToDisplay to get real name (with "Config.")
		 *		fmt.Printf(" %s", f.Name)
		 *		for i := len(f.Name)+1 ; i < f.MaxLen+1 ; i++ {  */
		fmt.Printf(" %s", valsToDisplay[i])
		for i := len(valsToDisplay[i])+1 ; i < f.MaxLen+1 ; i++ {
			fmt.Printf(" ")
		}
		fmt.Printf(" |")
	}
	//  Finally separator line
	fmt.Printf("\n")
	for i, f := range out[0] {
		if i == 0 {	fmt.Printf("+")	}
		for i := 0 ; i < f.MaxLen+2 ; i++ {	fmt.Printf("=")	}
		fmt.Printf("+")
	}
	fmt.Printf("\n")
	
	// Then display data
	//  Loop through lines
	for _, l := range out {
		
		// Loop through fields
		//  In case we need to add a line for a 2nd IP, or whatever object
		var supplines = make(map[string]string)
		for i, f := range l {
			if i == 0 {
				fmt.Printf("|")
			}
			// Special cases of value displaying
			if f.Name == "JID" && f.Value == "0" {
				fmt.Printf("  ")
			} else if f.Name == "Ip4_addr" {
				ia := strings.Split(f.Value, ",")
				// If we have more than 1 value we need to finish this line, and store value for writing at the end of line loop
				for i, inter := range ia {
					if i > 0 {
						supplines[f.Name] = inter
					} else {
						fmt.Printf(" %s", inter)
					}
				}
				//fmt.Printf(" %s", strings.Split(strings.Split(f.Value, "|")[1], "/")[0])
			} else {
				fmt.Printf(" %s", f.Value)
			}
			// Complete with spaces to the max length
			for i := len(f.Value)+1 ; i < f.MaxLen+1 ; i++ {
				fmt.Printf(" ")
			}
			fmt.Printf(" |")
		}
		// Draw supplementary lines
		if len(supplines) > 0 {
			for i, f := range l {
				if i == 0 {
					fmt.Printf("\n|")
				}
				// Overwrite value in this scope
				v, exists := supplines[f.Name]
				if exists {
					fmt.Printf(" %s", v)
				} else {
					// 1st option : Do not redisplay precedent line values
					fmt.Printf(" ")
					// 2nd option : Redisplay precedenet line values
					//fmt.Printf(" %s", f.Value)
				}
				// Complete with spaces to the max length
				for i := len(v)+1 ; i < f.MaxLen+1 ; i++ {
					fmt.Printf(" ")
				}
				fmt.Printf(" |")
			}
		}
		// Draw line separator between jails
		if !gNoLineSep {
			fmt.Printf("\n")
			for i, f := range out[0] {
				if i == 0 {	fmt.Printf("+")	}
				for i := 0 ; i < f.MaxLen+2 ; i++ {	fmt.Printf("-")	}
				fmt.Printf("+")
			}
		}
		fmt.Printf("\n")
	}
	if gNoLineSep {
		for i, f := range out[0] {
			if i == 0 {	fmt.Printf("+")	}
			for i := 0 ; i < f.MaxLen+2 ; i++ {	fmt.Printf("-")	}
			fmt.Printf("+")
		}
	}
	
	fmt.Printf("\n")
}



/*****************************************************************************
*
* Sorting jails
*
*****************************************************************************/

// already defined in cmd/struct.go
//type lessFunc func(j1 *Jail, j2 *Jail) bool
func initSortStruct() JailSort {
	jcs := JailConfigSort{
		Allow_chflagsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_chflags < j2.Config.Allow_chflags
		},
		Allow_chflagsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_chflags > j2.Config.Allow_chflags
		},
		Allow_mlockInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mlock < j2.Config.Allow_mlock
		},
		Allow_mlockDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mlock > j2.Config.Allow_mlock
		},
		Allow_mountInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount < j2.Config.Allow_mount
		},
		Allow_mountDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount > j2.Config.Allow_mount
		},
		Allow_mount_devfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_devfs < j2.Config.Allow_mount_devfs
		},
		Allow_mount_devfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_devfs > j2.Config.Allow_mount_devfs
		},
		Allow_mount_fusefsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_fusefs < j2.Config.Allow_mount_fusefs
		},
		Allow_mount_fusefsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_fusefs > j2.Config.Allow_mount_fusefs
		},
		Allow_mount_nullfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_nullfs < j2.Config.Allow_mount_nullfs
		},
		Allow_mount_nullfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_nullfs > j2.Config.Allow_mount_nullfs
		},
		Allow_mount_procfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_procfs < j2.Config.Allow_mount_procfs
		},
		Allow_mount_procfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_procfs > j2.Config.Allow_mount_procfs
		},
		Allow_mount_tmpfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_tmpfs < j2.Config.Allow_mount_tmpfs
		},
		Allow_mount_tmpfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_tmpfs > j2.Config.Allow_mount_tmpfs
		},
		Allow_mount_zfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_zfs < j2.Config.Allow_mount_zfs
		},
		Allow_mount_zfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_mount_zfs > j2.Config.Allow_mount_zfs
		},
		Allow_quotasInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_quotas < j2.Config.Allow_quotas
		},
		Allow_quotasDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_quotas > j2.Config.Allow_quotas
		},
		Allow_raw_socketsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_raw_sockets < j2.Config.Allow_raw_sockets
		},
		Allow_raw_socketsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_raw_sockets > j2.Config.Allow_raw_sockets
		},
		Allow_set_hostnameInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_set_hostname < j2.Config.Allow_set_hostname
		},
		Allow_set_hostnameDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_set_hostname > j2.Config.Allow_set_hostname
		},
		Allow_socket_afInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_socket_af < j2.Config.Allow_socket_af
		},
		Allow_socket_afDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_socket_af > j2.Config.Allow_socket_af
		},
		Allow_sysvipcInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_sysvipc < j2.Config.Allow_sysvipc
		},
		Allow_sysvipcDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_sysvipc > j2.Config.Allow_sysvipc
		},
		Allow_tunInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_tun < j2.Config.Allow_tun
		},
		Allow_tunDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_tun > j2.Config.Allow_tun
		},
		Allow_vmmInc: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_vmm < j2.Config.Allow_vmm
		},
		Allow_vmmDec: func(j1, j2 *Jail) bool {
			return j1.Config.Allow_vmm > j2.Config.Allow_vmm
		},
		Assign_localhostInc: func(j1, j2 *Jail) bool {
			return j1.Config.Assign_localhost < j2.Config.Assign_localhost
		},
		Assign_localhostDec: func(j1, j2 *Jail) bool {
			return j1.Config.Assign_localhost > j2.Config.Assign_localhost
		},
		AvailableInc: func(j1, j2 *Jail) bool {
			return j1.Config.Available < j2.Config.Available
		},
		AvailableDec: func(j1, j2 *Jail) bool {
			return j1.Config.Available > j2.Config.Available
		},
		BasejailInc: func(j1, j2 *Jail) bool {
			return j1.Config.Basejail < j2.Config.Basejail
		},
		BasejailDec: func(j1, j2 *Jail) bool {
			return j1.Config.Basejail > j2.Config.Basejail
		},
		BootInc: func(j1, j2 *Jail) bool {
			return j1.Config.Boot < j2.Config.Boot
		},
		BootDec: func(j1, j2 *Jail) bool {
			return j1.Config.Boot > j2.Config.Boot
		},
		BpfInc: func(j1, j2 *Jail) bool {
			return j1.Config.Bpf < j2.Config.Bpf
		},
		BpfDec: func(j1, j2 *Jail) bool {
			return j1.Config.Bpf > j2.Config.Bpf
		},
		Children_maxInc: func(j1, j2 *Jail) bool {
			return j1.Config.Children_max < j2.Config.Children_max
		},
		Children_maxDec: func(j1, j2 *Jail) bool {
			return j1.Config.Children_max > j2.Config.Children_max
		},
		Cloned_releaseInc: func(j1, j2 *Jail) bool {
			return j1.Config.Cloned_release < j2.Config.Cloned_release
		},
		Cloned_releaseDec: func(j1, j2 *Jail) bool {
			return j1.Config.Cloned_release > j2.Config.Cloned_release
		},
		CommentInc: func(j1, j2 *Jail) bool {
			return j1.Config.Comment < j2.Config.Comment
		},
		CommentDec: func(j1, j2 *Jail) bool {
			return j1.Config.Comment > j2.Config.Comment
		},
		CompressionInc: func(j1, j2 *Jail) bool {
			return j1.Config.Compression < j2.Config.Compression
		},
		CompressionDec: func(j1, j2 *Jail) bool {
			return j1.Config.Compression > j2.Config.Compression
		},
		CompressratioInc: func(j1, j2 *Jail) bool {
			return j1.Config.Compressratio < j2.Config.Compressratio
		},
		CompressratioDec: func(j1, j2 *Jail) bool {
			return j1.Config.Compressratio > j2.Config.Compressratio
		},
		Config_versionInc: func(j1, j2 *Jail) bool {
			return j1.Config.Config_version < j2.Config.Config_version
		},
		Config_versionDec: func(j1, j2 *Jail) bool {
			return j1.Config.Config_version > j2.Config.Config_version
		},
		CoredumpsizeInc: func(j1, j2 *Jail) bool {
			return j1.Config.Coredumpsize < j2.Config.Coredumpsize
		},
		CoredumpsizeDec: func(j1, j2 *Jail) bool {
			return j1.Config.Coredumpsize > j2.Config.Coredumpsize
		},
		CountInc: func(j1, j2 *Jail) bool {
			return j1.Config.Count < j2.Config.Count
		},
		CountDec: func(j1, j2 *Jail) bool {
			return j1.Config.Count > j2.Config.Count
		},
		CpusetInc: func(j1, j2 *Jail) bool {
			return j1.Config.Cpuset < j2.Config.Cpuset
		},
		CpusetDec: func(j1, j2 *Jail) bool {
			return j1.Config.Cpuset > j2.Config.Cpuset
		},
		CputimeInc: func(j1, j2 *Jail) bool {
			return j1.Config.Cputime < j2.Config.Cputime
		},
		CputimeDec: func(j1, j2 *Jail) bool {
			return j1.Config.Cputime > j2.Config.Cputime
		},
		DatasizeInc: func(j1, j2 *Jail) bool {
			return j1.Config.Datasize < j2.Config.Datasize
		},
		DatasizeDec: func(j1, j2 *Jail) bool {
			return j1.Config.Datasize > j2.Config.Datasize
		},
		DedupInc: func(j1, j2 *Jail) bool {
			return j1.Config.Dedup < j2.Config.Dedup
		},
		DedupDec: func(j1, j2 *Jail) bool {
			return j1.Config.Dedup > j2.Config.Dedup
		},
		DefaultrouterInc: func(j1, j2 *Jail) bool {
			return j1.Config.Defaultrouter < j2.Config.Defaultrouter
		},
		DefaultrouterDec: func(j1, j2 *Jail) bool {
			return j1.Config.Defaultrouter > j2.Config.Defaultrouter
		},
		Defaultrouter6Inc: func(j1, j2 *Jail) bool {
			return j1.Config.Defaultrouter6 < j2.Config.Defaultrouter6
		},
		Defaultrouter6Dec: func(j1, j2 *Jail) bool {
			return j1.Config.Defaultrouter6 > j2.Config.Defaultrouter6
		},
		DependsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Depends < j2.Config.Depends
		},
		DependsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Depends > j2.Config.Depends
		},
		Devfs_rulesetInc: func(j1, j2 *Jail) bool {
			return j1.Config.Devfs_ruleset < j2.Config.Devfs_ruleset
		},
		Devfs_rulesetDec: func(j1, j2 *Jail) bool {
			return j1.Config.Devfs_ruleset > j2.Config.Devfs_ruleset
		},
		DhcpInc: func(j1, j2 *Jail) bool {
			return j1.Config.Dhcp < j2.Config.Dhcp
		},
		DhcpDec: func(j1, j2 *Jail) bool {
			return j1.Config.Dhcp > j2.Config.Dhcp
		},
		Enforce_statfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Enforce_statfs < j2.Config.Enforce_statfs
		},
		Enforce_statfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Enforce_statfs > j2.Config.Enforce_statfs
		},
		Exec_cleanInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_clean < j2.Config.Exec_clean
		},
		Exec_cleanDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_clean > j2.Config.Exec_clean
		},
		Exec_createdInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_created < j2.Config.Exec_created
		},
		Exec_createdDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_created > j2.Config.Exec_created
		},
		Exec_fibInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_fib < j2.Config.Exec_fib
		},
		Exec_fibDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_fib > j2.Config.Exec_fib
		},
		Exec_jail_userInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_jail_user < j2.Config.Exec_jail_user
		},
		Exec_jail_userDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_jail_user > j2.Config.Exec_jail_user
		},
		Exec_poststartInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_poststart < j2.Config.Exec_poststart
		},
		Exec_poststartDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_poststart > j2.Config.Exec_poststart
		},
		Exec_poststopInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_poststop < j2.Config.Exec_poststop
		},
		Exec_poststopDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_poststop > j2.Config.Exec_poststop
		},
		Exec_prestartInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_prestart < j2.Config.Exec_prestart
		},
		Exec_prestartDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_prestart > j2.Config.Exec_prestart
		},
		Exec_prestopInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_prestop < j2.Config.Exec_prestop
		},
		Exec_prestopDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_prestop > j2.Config.Exec_prestop
		},
		Exec_startInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_start < j2.Config.Exec_start
		},
		Exec_startDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_start > j2.Config.Exec_start
		},
		Exec_stopInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_stop < j2.Config.Exec_stop
		},
		Exec_stopDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_stop > j2.Config.Exec_stop
		},
		Exec_system_jail_userInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_system_jail_user < j2.Config.Exec_system_jail_user
		},
		Exec_system_jail_userDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_system_jail_user > j2.Config.Exec_system_jail_user
		},
		Exec_system_userInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_system_user < j2.Config.Exec_system_user
		},
		Exec_system_userDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_system_user > j2.Config.Exec_system_user
		},
		Exec_timeoutInc: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_timeout < j2.Config.Exec_timeout
		},
		Exec_timeoutDec: func(j1, j2 *Jail) bool {
			return j1.Config.Exec_timeout > j2.Config.Exec_timeout
		},
		Host_domainnameInc: func(j1, j2 *Jail) bool {
			return j1.Config.Host_domainname < j2.Config.Host_domainname
		},
		Host_domainnameDec: func(j1, j2 *Jail) bool {
			return j1.Config.Host_domainname > j2.Config.Host_domainname
		},
		Host_hostnameInc: func(j1, j2 *Jail) bool {
			return j1.Config.Host_hostname < j2.Config.Host_hostname
		},
		Host_hostnameDec: func(j1, j2 *Jail) bool {
			return j1.Config.Host_hostname > j2.Config.Host_hostname
		},
		Host_hostuuidInc: func(j1, j2 *Jail) bool {
			return j1.Config.Host_hostuuid < j2.Config.Host_hostuuid
		},
		Host_hostuuidDec: func(j1, j2 *Jail) bool {
			return j1.Config.Host_hostuuid > j2.Config.Host_hostuuid
		},
		Host_timeInc: func(j1, j2 *Jail) bool {
			return j1.Config.Host_time < j2.Config.Host_time
		},
		Host_timeDec: func(j1, j2 *Jail) bool {
			return j1.Config.Host_time > j2.Config.Host_time
		},
		HostidInc: func(j1, j2 *Jail) bool {
			return j1.Config.Hostid < j2.Config.Hostid
		},
		HostidDec: func(j1, j2 *Jail) bool {
			return j1.Config.Hostid > j2.Config.Hostid
		},
		Hostid_strict_checkInc: func(j1, j2 *Jail) bool {
			return j1.Config.Hostid_strict_check < j2.Config.Hostid_strict_check
		},
		Hostid_strict_checkDec: func(j1, j2 *Jail) bool {
			return j1.Config.Hostid_strict_check > j2.Config.Hostid_strict_check
		},
		InterfacesInc: func(j1, j2 *Jail) bool {
			return j1.Config.Interfaces < j2.Config.Interfaces
		},
		InterfacesDec: func(j1, j2 *Jail) bool {
			return j1.Config.Interfaces > j2.Config.Interfaces
		},
		Ip_hostnameInc: func(j1, j2 *Jail) bool {
			return j1.Config.Ip_hostname < j2.Config.Ip_hostname
		},
		Ip_hostnameDec: func(j1, j2 *Jail) bool {
			return j1.Config.Ip_hostname > j2.Config.Ip_hostname
		},
		Ip4Inc: func(j1, j2 *Jail) bool {
			return j1.Config.Ip4 < j2.Config.Ip4
		},
		Ip4Dec: func(j1, j2 *Jail) bool {
			return j1.Config.Ip4 > j2.Config.Ip4
		},
		Ip4_addrInc: func(j1, j2 *Jail) bool {
			return j1.Config.Ip4_addr < j2.Config.Ip4_addr
		},
		Ip4_addrDec: func(j1, j2 *Jail) bool {
			return j1.Config.Ip4_addr > j2.Config.Ip4_addr
		},
		Ip4_saddrselInc: func(j1, j2 *Jail) bool {
			return j1.Config.Ip4_saddrsel < j2.Config.Ip4_saddrsel
		},
		Ip4_saddrselDec: func(j1, j2 *Jail) bool {
			return j1.Config.Ip4_saddrsel > j2.Config.Ip4_saddrsel
		},
		Ip6Inc: func(j1, j2 *Jail) bool {
			return j1.Config.Ip6 < j2.Config.Ip6
		},
		Ip6Dec: func(j1, j2 *Jail) bool {
			return j1.Config.Ip6 > j2.Config.Ip6
		},
		Ip6_addrInc: func(j1, j2 *Jail) bool {
			return j1.Config.Ip6_addr < j2.Config.Ip6_addr
		},
		Ip6_addrDec: func(j1, j2 *Jail) bool {
			return j1.Config.Ip6_addr > j2.Config.Ip6_addr
		},
		Ip6_saddrselInc: func(j1, j2 *Jail) bool {
			return j1.Config.Ip6_saddrsel < j2.Config.Ip6_saddrsel
		},
		Ip6_saddrselDec: func(j1, j2 *Jail) bool {
			return j1.Config.Ip6_saddrsel > j2.Config.Ip6_saddrsel
		},
		Jail_zfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Jail_zfs < j2.Config.Jail_zfs
		},
		Jail_zfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Jail_zfs > j2.Config.Jail_zfs
		},
		Jail_zfs_datasetInc: func(j1, j2 *Jail) bool {
			return j1.Config.Jail_zfs_dataset < j2.Config.Jail_zfs_dataset
		},
		Jail_zfs_datasetDec: func(j1, j2 *Jail) bool {
			return j1.Config.Jail_zfs_dataset > j2.Config.Jail_zfs_dataset
		},
		Jail_zfs_mountpointInc: func(j1, j2 *Jail) bool {
			return j1.Config.Jail_zfs_mountpoint < j2.Config.Jail_zfs_mountpoint
		},
		Jail_zfs_mountpointDec: func(j1, j2 *Jail) bool {
			return j1.Config.Jail_zfs_mountpoint > j2.Config.Jail_zfs_mountpoint
		},
		JailtypeInc: func(j1, j2 *Jail) bool {
			return j1.Config.Jailtype < j2.Config.Jailtype
		},
		JailtypeDec: func(j1, j2 *Jail) bool {
			return j1.Config.Jailtype > j2.Config.Jailtype
		},
		Last_startedInc: func(j1, j2 *Jail) bool {
			return j1.Config.Last_started < j2.Config.Last_started
		},
		Last_startedDec: func(j1, j2 *Jail) bool {
			return j1.Config.Last_started > j2.Config.Last_started
		},
		Localhost_ipInc: func(j1, j2 *Jail) bool {
			return j1.Config.Localhost_ip < j2.Config.Localhost_ip
		},
		Localhost_ipDec: func(j1, j2 *Jail) bool {
			return j1.Config.Localhost_ip > j2.Config.Localhost_ip
		},
		Login_flagsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Login_flags < j2.Config.Login_flags
		},
		Login_flagsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Login_flags > j2.Config.Login_flags
		},
		Mac_prefixInc: func(j1, j2 *Jail) bool {
			return j1.Config.Mac_prefix < j2.Config.Mac_prefix
		},
		Mac_prefixDec: func(j1, j2 *Jail) bool {
			return j1.Config.Mac_prefix > j2.Config.Mac_prefix
		},
		MaxprocInc: func(j1, j2 *Jail) bool {
			return j1.Config.Maxproc < j2.Config.Maxproc
		},
		MaxprocDec: func(j1, j2 *Jail) bool {
			return j1.Config.Maxproc > j2.Config.Maxproc
		},
		MemorylockedInc: func(j1, j2 *Jail) bool {
			return j1.Config.Memorylocked < j2.Config.Memorylocked
		},
		MemorylockedDec: func(j1, j2 *Jail) bool {
			return j1.Config.Memorylocked > j2.Config.Memorylocked
		},
		MemoryuseInc: func(j1, j2 *Jail) bool {
			return j1.Config.Memoryuse < j2.Config.Memoryuse
		},
		MemoryuseDec: func(j1, j2 *Jail) bool {
			return j1.Config.Memoryuse > j2.Config.Memoryuse
		},
		Min_dyn_devfs_rulesetInc: func(j1, j2 *Jail) bool {
			return j1.Config.Min_dyn_devfs_ruleset < j2.Config.Min_dyn_devfs_ruleset
		},
		Min_dyn_devfs_rulesetDec: func(j1, j2 *Jail) bool {
			return j1.Config.Min_dyn_devfs_ruleset > j2.Config.Min_dyn_devfs_ruleset
		},
		Mount_devfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Mount_devfs < j2.Config.Mount_devfs
		},
		Mount_devfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Mount_devfs > j2.Config.Mount_devfs
		},
		Mount_fdescfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Mount_fdescfs < j2.Config.Mount_fdescfs
		},
		Mount_fdescfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Mount_fdescfs > j2.Config.Mount_fdescfs
		},
		Mount_linprocfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Mount_linprocfs < j2.Config.Mount_linprocfs
		},
		Mount_linprocfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Mount_linprocfs > j2.Config.Mount_linprocfs
		},
		Mount_procfsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Mount_procfs < j2.Config.Mount_procfs
		},
		Mount_procfsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Mount_procfs > j2.Config.Mount_procfs
		},
		MountpointInc: func(j1, j2 *Jail) bool {
			return j1.Config.Mountpoint < j2.Config.Mountpoint
		},
		MountpointDec: func(j1, j2 *Jail) bool {
			return j1.Config.Mountpoint > j2.Config.Mountpoint
		},
		MsgqqueuedInc: func(j1, j2 *Jail) bool {
			return j1.Config.Msgqqueued < j2.Config.Msgqqueued
		},
		MsgqqueuedDec: func(j1, j2 *Jail) bool {
			return j1.Config.Msgqqueued > j2.Config.Msgqqueued
		},
		MsgqsizeInc: func(j1, j2 *Jail) bool {
			return j1.Config.Msgqsize < j2.Config.Msgqsize
		},
		MsgqsizeDec: func(j1, j2 *Jail) bool {
			return j1.Config.Msgqsize > j2.Config.Msgqsize
		},
		NatInc: func(j1, j2 *Jail) bool {
			return j1.Config.Nat < j2.Config.Nat
		},
		NatDec: func(j1, j2 *Jail) bool {
			return j1.Config.Nat > j2.Config.Nat
		},
		Nat_backendInc: func(j1, j2 *Jail) bool {
			return j1.Config.Nat_backend < j2.Config.Nat_backend
		},
		Nat_backendDec: func(j1, j2 *Jail) bool {
			return j1.Config.Nat_backend > j2.Config.Nat_backend
		},
		Nat_forwardsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Nat_forwards < j2.Config.Nat_forwards
		},
		Nat_forwardsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Nat_forwards > j2.Config.Nat_forwards
		},
		Nat_interfaceInc: func(j1, j2 *Jail) bool {
			return j1.Config.Nat_interface < j2.Config.Nat_interface
		},
		Nat_interfaceDec: func(j1, j2 *Jail) bool {
			return j1.Config.Nat_interface > j2.Config.Nat_interface
		},
		Nat_prefixInc: func(j1, j2 *Jail) bool {
			return j1.Config.Nat_prefix < j2.Config.Nat_prefix
		},
		Nat_prefixDec: func(j1, j2 *Jail) bool {
			return j1.Config.Nat_prefix > j2.Config.Nat_prefix
		},
		NmsgqInc: func(j1, j2 *Jail) bool {
			return j1.Config.Nmsgq < j2.Config.Nmsgq
		},
		NmsgqDec: func(j1, j2 *Jail) bool {
			return j1.Config.Nmsgq > j2.Config.Nmsgq
		},
		NotesInc: func(j1, j2 *Jail) bool {
			return j1.Config.Notes < j2.Config.Notes
		},
		NotesDec: func(j1, j2 *Jail) bool {
			return j1.Config.Notes > j2.Config.Notes
		},
		NsemInc: func(j1, j2 *Jail) bool {
			return j1.Config.Nsem < j2.Config.Nsem
		},
		NsemDec: func(j1, j2 *Jail) bool {
			return j1.Config.Nsem > j2.Config.Nsem
		},
		NsemopInc: func(j1, j2 *Jail) bool {
			return j1.Config.Nsemop < j2.Config.Nsemop
		},
		NsemopDec: func(j1, j2 *Jail) bool {
			return j1.Config.Nsemop > j2.Config.Nsemop
		},
		NshmInc: func(j1, j2 *Jail) bool {
			return j1.Config.Nshm < j2.Config.Nshm
		},
		NshmDec: func(j1, j2 *Jail) bool {
			return j1.Config.Nshm > j2.Config.Nshm
		},
		NthrInc: func(j1, j2 *Jail) bool {
			return j1.Config.Nthr < j2.Config.Nthr
		},
		NthrDec: func(j1, j2 *Jail) bool {
			return j1.Config.Nthr > j2.Config.Nthr
		},
		OpenfilesInc: func(j1, j2 *Jail) bool {
			return j1.Config.Openfiles < j2.Config.Openfiles
		},
		OpenfilesDec: func(j1, j2 *Jail) bool {
			return j1.Config.Openfiles > j2.Config.Openfiles
		},
		OriginInc: func(j1, j2 *Jail) bool {
			return j1.Config.Origin < j2.Config.Origin
		},
		OriginDec: func(j1, j2 *Jail) bool {
			return j1.Config.Origin > j2.Config.Origin
		},
		OwnerInc: func(j1, j2 *Jail) bool {
			return j1.Config.Owner < j2.Config.Owner
		},
		OwnerDec: func(j1, j2 *Jail) bool {
			return j1.Config.Owner > j2.Config.Owner
		},
		PcpuInc: func(j1, j2 *Jail) bool {
			return j1.Config.Pcpu < j2.Config.Pcpu
		},
		PcpuDec: func(j1, j2 *Jail) bool {
			return j1.Config.Pcpu > j2.Config.Pcpu
		},
		Plugin_nameInc: func(j1, j2 *Jail) bool {
			return j1.Config.Plugin_name < j2.Config.Plugin_name
		},
		Plugin_nameDec: func(j1, j2 *Jail) bool {
			return j1.Config.Plugin_name > j2.Config.Plugin_name
		},
		Plugin_repositoryInc: func(j1, j2 *Jail) bool {
			return j1.Config.Plugin_repository < j2.Config.Plugin_repository
		},
		Plugin_repositoryDec: func(j1, j2 *Jail) bool {
			return j1.Config.Plugin_repository > j2.Config.Plugin_repository
		},
		PriorityInc: func(j1, j2 *Jail) bool {
			return j1.Config.Priority < j2.Config.Priority
		},
		PriorityDec: func(j1, j2 *Jail) bool {
			return j1.Config.Priority > j2.Config.Priority
		},
		PseudoterminalsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Pseudoterminals < j2.Config.Pseudoterminals
		},
		PseudoterminalsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Pseudoterminals > j2.Config.Pseudoterminals
		},
		QuotaInc: func(j1, j2 *Jail) bool {
			return j1.Config.Quota < j2.Config.Quota
		},
		QuotaDec: func(j1, j2 *Jail) bool {
			return j1.Config.Quota > j2.Config.Quota
		},
		ReadbpsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Readbps < j2.Config.Readbps
		},
		ReadbpsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Readbps > j2.Config.Readbps
		},
		ReadiopsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Readiops < j2.Config.Readiops
		},
		ReadiopsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Readiops > j2.Config.Readiops
		},
		ReleaseInc: func(j1, j2 *Jail) bool {
			return j1.Config.Release < j2.Config.Release
		},
		ReleaseDec: func(j1, j2 *Jail) bool {
			return j1.Config.Release > j2.Config.Release
		},
		ReservationInc: func(j1, j2 *Jail) bool {
			return j1.Config.Reservation < j2.Config.Reservation
		},
		ReservationDec: func(j1, j2 *Jail) bool {
			return j1.Config.Reservation > j2.Config.Reservation
		},
		ResolverInc: func(j1, j2 *Jail) bool {
			return j1.Config.Resolver < j2.Config.Resolver
		},
		ResolverDec: func(j1, j2 *Jail) bool {
			return j1.Config.Resolver > j2.Config.Resolver
		},
		RlimitsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Rlimits < j2.Config.Rlimits
		},
		RlimitsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Rlimits > j2.Config.Rlimits
		},
		RtsoldInc: func(j1, j2 *Jail) bool {
			return j1.Config.Rtsold < j2.Config.Rtsold
		},
		RtsoldDec: func(j1, j2 *Jail) bool {
			return j1.Config.Rtsold > j2.Config.Rtsold
		},
		SecurelevelInc: func(j1, j2 *Jail) bool {
			return j1.Config.Securelevel < j2.Config.Securelevel
		},
		SecurelevelDec: func(j1, j2 *Jail) bool {
			return j1.Config.Securelevel > j2.Config.Securelevel
		},
		ShmsizeInc: func(j1, j2 *Jail) bool {
			return j1.Config.Shmsize < j2.Config.Shmsize
		},
		ShmsizeDec: func(j1, j2 *Jail) bool {
			return j1.Config.Shmsize > j2.Config.Shmsize
		},
		StacksizeInc: func(j1, j2 *Jail) bool {
			return j1.Config.Stacksize < j2.Config.Stacksize
		},
		StacksizeDec: func(j1, j2 *Jail) bool {
			return j1.Config.Stacksize > j2.Config.Stacksize
		},
		Stop_timeoutInc: func(j1, j2 *Jail) bool {
			return j1.Config.Stop_timeout < j2.Config.Stop_timeout
		},
		Stop_timeoutDec: func(j1, j2 *Jail) bool {
			return j1.Config.Stop_timeout > j2.Config.Stop_timeout
		},
		SwapuseInc: func(j1, j2 *Jail) bool {
			return j1.Config.Swapuse < j2.Config.Swapuse
		},
		SwapuseDec: func(j1, j2 *Jail) bool {
			return j1.Config.Swapuse > j2.Config.Swapuse
		},
		Sync_stateInc: func(j1, j2 *Jail) bool {
			return j1.Config.Sync_state < j2.Config.Sync_state
		},
		Sync_stateDec: func(j1, j2 *Jail) bool {
			return j1.Config.Sync_state > j2.Config.Sync_state
		},
		Sync_targetInc: func(j1, j2 *Jail) bool {
			return j1.Config.Sync_target < j2.Config.Sync_target
		},
		Sync_targetDec: func(j1, j2 *Jail) bool {
			return j1.Config.Sync_target > j2.Config.Sync_target
		},
		Sync_tgt_zpoolInc: func(j1, j2 *Jail) bool {
			return j1.Config.Sync_tgt_zpool < j2.Config.Sync_tgt_zpool
		},
		Sync_tgt_zpoolDec: func(j1, j2 *Jail) bool {
			return j1.Config.Sync_tgt_zpool > j2.Config.Sync_tgt_zpool
		},
		SysvmsgInc: func(j1, j2 *Jail) bool {
			return j1.Config.Sysvmsg < j2.Config.Sysvmsg
		},
		SysvmsgDec: func(j1, j2 *Jail) bool {
			return j1.Config.Sysvmsg > j2.Config.Sysvmsg
		},
		SysvsemInc: func(j1, j2 *Jail) bool {
			return j1.Config.Sysvsem < j2.Config.Sysvsem
		},
		SysvsemDec: func(j1, j2 *Jail) bool {
			return j1.Config.Sysvsem > j2.Config.Sysvsem
		},
		SysvshmInc: func(j1, j2 *Jail) bool {
			return j1.Config.Sysvshm < j2.Config.Sysvshm
		},
		SysvshmDec: func(j1, j2 *Jail) bool {
			return j1.Config.Sysvshm > j2.Config.Sysvshm
		},
		TemplateInc: func(j1, j2 *Jail) bool {
			return j1.Config.Template < j2.Config.Template
		},
		TemplateDec: func(j1, j2 *Jail) bool {
			return j1.Config.Template > j2.Config.Template
		},
		UsedInc: func(j1, j2 *Jail) bool {
			return j1.Config.Used < j2.Config.Used
		},
		UsedDec: func(j1, j2 *Jail) bool {
			return j1.Config.Used > j2.Config.Used
		},
		VmemoryuseInc: func(j1, j2 *Jail) bool {
			return j1.Config.Vmemoryuse < j2.Config.Vmemoryuse
		},
		VmemoryuseDec: func(j1, j2 *Jail) bool {
			return j1.Config.Vmemoryuse > j2.Config.Vmemoryuse
		},
		VnetInc: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet < j2.Config.Vnet
		},
		VnetDec: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet > j2.Config.Vnet
		},
		Vnet_default_interfaceInc: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet_default_interface < j2.Config.Vnet_default_interface
		},
		Vnet_default_interfaceDec: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet_default_interface > j2.Config.Vnet_default_interface
		},
		Vnet_interfacesInc: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet_interfaces < j2.Config.Vnet_interfaces
		},
		Vnet_interfacesDec: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet_interfaces > j2.Config.Vnet_interfaces
		},
		Vnet0_macInc: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet0_mac < j2.Config.Vnet0_mac
		},
		Vnet0_macDec: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet0_mac > j2.Config.Vnet0_mac
		},
		Vnet1_macInc: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet1_mac < j2.Config.Vnet1_mac
		},
		Vnet1_macDec: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet1_mac > j2.Config.Vnet1_mac
		},
		Vnet2_macInc: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet2_mac < j2.Config.Vnet2_mac
		},
		Vnet2_macDec: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet2_mac > j2.Config.Vnet2_mac
		},
		Vnet3_macInc: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet3_mac < j2.Config.Vnet3_mac
		},
		Vnet3_macDec: func(j1, j2 *Jail) bool {
			return j1.Config.Vnet3_mac > j2.Config.Vnet3_mac
		},
		WallclockInc: func(j1, j2 *Jail) bool {
			return j1.Config.Wallclock < j2.Config.Wallclock
		},
		WallclockDec: func(j1, j2 *Jail) bool {
			return j1.Config.Wallclock > j2.Config.Wallclock
		},
		WritebpsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Writebps < j2.Config.Writebps
		},
		WritebpsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Writebps > j2.Config.Writebps
		},
		WriteiopsInc: func(j1, j2 *Jail) bool {
			return j1.Config.Writeiops < j2.Config.Writeiops
		},
		WriteiopsDec: func(j1, j2 *Jail) bool {
			return j1.Config.Writeiops > j2.Config.Writeiops
		},
	}
	
	js := JailSort{
		ConfigPathInc: func(j1, j2 *Jail) bool {
			return j1.ConfigPath < j2.ConfigPath
		},
		ConfigPathDec: func(j1, j2 *Jail) bool {
			return j1.ConfigPath > j2.ConfigPath
		},
		InternalNameInc: func(j1, j2 *Jail) bool {
			return j1.InternalName < j2.InternalName
		},
		InternalNameDec: func(j1, j2 *Jail) bool {
			return j1.InternalName > j2.InternalName
		},
		JIDInc: func(j1, j2 *Jail) bool {
			return j1.JID < j2.JID
		},
		JIDDec: func(j1, j2 *Jail) bool {
			return j1.JID > j2.JID
		},
		NameInc: func(j1, j2 *Jail) bool {
			return j1.Name < j2.Name
		},
		NameDec: func(j1, j2 *Jail) bool {
			return j1.Name > j2.Name
		},
		RootPathInc: func(j1, j2 *Jail) bool {
			return j1.RootPath < j2.RootPath
		},
		RootPathDec: func(j1, j2 *Jail) bool {
			return j1.RootPath > j2.RootPath
		},
		RunningInc: func(j1, j2 *Jail) bool {
			return !j1.Running && j2.Running
		},
		RunningDec: func(j1, j2 *Jail) bool {
			return j1.Running && !j2.Running
		},
		ZpoolInc: func(j1, j2 *Jail) bool {
			return j1.Zpool < j2.Zpool
		},
		ZpoolDec: func(j1, j2 *Jail) bool {
			return j1.Zpool > j2.Zpool
		},
		Config: jcs,
	}

	return js
}

// multiSorter implements the Sort interface, sorting the jails within.
type multiSorter struct {
	jails	[]Jail
	less	[]lessFunc
}

// Sort sorts the argument slice according to the less functions passed to OrderedBy.
func (ms *multiSorter) Sort(jails []Jail) {
	ms.jails = jails
	sort.Sort(ms)
}

// OrderedBy returns a Sorter that sorts using the less functions, in order.
// Call its Sort method to sort the data.
func OrderedBy(less ...lessFunc) *multiSorter {
	return &multiSorter{
		less: less,
	}
}

// Len is part of sort.Interface.
func (ms *multiSorter) Len() int {
	return len(ms.jails)
}

// Swap is part of sort.Interface.
func (ms *multiSorter) Swap(i, j int) {
	ms.jails[i], ms.jails[j] = ms.jails[j], ms.jails[i]
}

// Less is part of sort.Interface. It is implemented by looping along the
// less functions until it finds a comparison that discriminates between
// the two items (one is less than the other). Note that it can call the
// less functions twice per call. We could change the functions to return
// -1, 0, 1 and reduce the number of calls for greater efficiency: an
// exercise for the reader.
func (ms *multiSorter) Less(i, j int) bool {
	p, q := &ms.jails[i], &ms.jails[j]
	// Try all but the last comparison.
	var k int
	for k = 0; k < len(ms.less)-1; k++ {
		less := ms.less[k]
		switch {
		case less(p, q):
			// p < q, so we have a decision.
			return true
		case less(q, p):
			// p > q, so we have a decision.
			return false
		}
		// p == q; try the next comparison.
	}
	// All comparisons to here said "equal", so just return whatever
	// the final comparison reports.
	return ms.less[k](p, q)
}