add vendor

vendor/github.com/fatih/color/LICENSE.md

+The MIT License (MIT)
+
+Copyright (c) 2013 Fatih Arslan
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/fatih/color/README.md

+# color [![](https://github.com/fatih/color/workflows/build/badge.svg)](https://github.com/fatih/color/actions) [![PkgGoDev](https://pkg.go.dev/badge/github.com/fatih/color)](https://pkg.go.dev/github.com/fatih/color)
+
+Color lets you use colorized outputs in terms of [ANSI Escape
+Codes](http://en.wikipedia.org/wiki/ANSI_escape_code#Colors) in Go (Golang). It
+has support for Windows too! The API can be used in several ways, pick one that
+suits you.
+
+![Color](https://user-images.githubusercontent.com/438920/96832689-03b3e000-13f4-11eb-9803-46f4c4de3406.jpg)
+
+## Install
+
+```
+go get github.com/fatih/color
+```
+
+## Examples
+
+### Standard colors
+
+```go
+// Print with default helper functions
+color.Cyan("Prints text in cyan.")
+
+// A newline will be appended automatically
+color.Blue("Prints %s in blue.", "text")
+
+// These are using the default foreground colors
+color.Red("We have red")
+color.Magenta("And many others ..")
+
+```
+
+### RGB colors
+
+If your terminal supports 24-bit colors, you can use RGB color codes.
+
+```go
+color.RGB(255, 128, 0).Println("foreground orange")
+color.RGB(230, 42, 42).Println("foreground red")
+
+color.BgRGB(255, 128, 0).Println("background orange")
+color.BgRGB(230, 42, 42).Println("background red")
+```
+
+### Mix and reuse colors
+
+```go
+// Create a new color object
+c := color.New(color.FgCyan).Add(color.Underline)
+c.Println("Prints cyan text with an underline.")
+
+// Or just add them to New()
+d := color.New(color.FgCyan, color.Bold)
+d.Printf("This prints bold cyan %s\n", "too!.")
+
+// Mix up foreground and background colors, create new mixes!
+red := color.New(color.FgRed)
+
+boldRed := red.Add(color.Bold)
+boldRed.Println("This will print text in bold red.")
+
+whiteBackground := red.Add(color.BgWhite)
+whiteBackground.Println("Red text with white background.")
+
+// Mix with RGB color codes
+color.RGB(255, 128, 0).AddBgRGB(0, 0, 0).Println("orange with black background")
+
+color.BgRGB(255, 128, 0).AddRGB(255, 255, 255).Println("orange background with white foreground")
+```
+
+### Use your own output (io.Writer)
+
+```go
+// Use your own io.Writer output
+color.New(color.FgBlue).Fprintln(myWriter, "blue color!")
+
+blue := color.New(color.FgBlue)
+blue.Fprint(writer, "This will print text in blue.")
+```
+
+### Custom print functions (PrintFunc)
+
+```go
+// Create a custom print function for convenience
+red := color.New(color.FgRed).PrintfFunc()
+red("Warning")
+red("Error: %s", err)
+
+// Mix up multiple attributes
+notice := color.New(color.Bold, color.FgGreen).PrintlnFunc()
+notice("Don't forget this...")
+```
+
+### Custom fprint functions (FprintFunc)
+
+```go
+blue := color.New(color.FgBlue).FprintfFunc()
+blue(myWriter, "important notice: %s", stars)
+
+// Mix up with multiple attributes
+success := color.New(color.Bold, color.FgGreen).FprintlnFunc()
+success(myWriter, "Don't forget this...")
+```
+
+### Insert into noncolor strings (SprintFunc)
+
+```go
+// Create SprintXxx functions to mix strings with other non-colorized strings:
+yellow := color.New(color.FgYellow).SprintFunc()
+red := color.New(color.FgRed).SprintFunc()
+fmt.Printf("This is a %s and this is %s.\n", yellow("warning"), red("error"))
+
+info := color.New(color.FgWhite, color.BgGreen).SprintFunc()
+fmt.Printf("This %s rocks!\n", info("package"))
+
+// Use helper functions
+fmt.Println("This", color.RedString("warning"), "should be not neglected.")
+fmt.Printf("%v %v\n", color.GreenString("Info:"), "an important message.")
+
+// Windows supported too! Just don't forget to change the output to color.Output
+fmt.Fprintf(color.Output, "Windows support: %s", color.GreenString("PASS"))
+```
+
+### Plug into existing code
+
+```go
+// Use handy standard colors
+color.Set(color.FgYellow)
+
+fmt.Println("Existing text will now be in yellow")
+fmt.Printf("This one %s\n", "too")
+
+color.Unset() // Don't forget to unset
+
+// You can mix up parameters
+color.Set(color.FgMagenta, color.Bold)
+defer color.Unset() // Use it in your function
+
+fmt.Println("All text will now be bold magenta.")
+```
+
+### Disable/Enable color
+
+There might be a case where you want to explicitly disable/enable color output. the 
+`go-isatty` package will automatically disable color output for non-tty output streams 
+(for example if the output were piped directly to `less`).
+
+The `color` package also disables color output if the [`NO_COLOR`](https://no-color.org) environment
+variable is set to a non-empty string.
+
+`Color` has support to disable/enable colors programmatically both globally and
+for single color definitions. For example suppose you have a CLI app and a
+`-no-color` bool flag. You can easily disable the color output with:
+
+```go
+var flagNoColor = flag.Bool("no-color", false, "Disable color output")
+
+if *flagNoColor {
+	color.NoColor = true // disables colorized output
+}
+```
+
+It also has support for single color definitions (local). You can
+disable/enable color output on the fly:
+
+```go
+c := color.New(color.FgCyan)
+c.Println("Prints cyan text")
+
+c.DisableColor()
+c.Println("This is printed without any color")
+
+c.EnableColor()
+c.Println("This prints again cyan...")
+```
+
+## GitHub Actions
+
+To output color in GitHub Actions (or other CI systems that support ANSI colors), make sure to set `color.NoColor = false` so that it bypasses the check for non-tty output streams. 
+
+
+## Credits
+
+* [Fatih Arslan](https://github.com/fatih)
+* Windows support via @mattn: [colorable](https://github.com/mattn/go-colorable)
+
+## License
+
+The MIT License (MIT) - see [`LICENSE.md`](https://github.com/fatih/color/blob/master/LICENSE.md) for more details

vendor/github.com/fatih/color/color_windows.go

+package color
+
+import (
+	"os"
+
+	"golang.org/x/sys/windows"
+)
+
+func init() {
+	// Opt-in for ansi color support for current process.
+	// https://learn.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences#output-sequences
+	var outMode uint32
+	out := windows.Handle(os.Stdout.Fd())
+	if err := windows.GetConsoleMode(out, &outMode); err != nil {
+		return
+	}
+	outMode |= windows.ENABLE_PROCESSED_OUTPUT | windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING
+	_ = windows.SetConsoleMode(out, outMode)
+}

vendor/github.com/fatih/color/doc.go

+/*
+Package color is an ANSI color package to output colorized or SGR defined
+output to the standard output. The API can be used in several way, pick one
+that suits you.
+
+Use simple and default helper functions with predefined foreground colors:
+
+	color.Cyan("Prints text in cyan.")
+
+	// a newline will be appended automatically
+	color.Blue("Prints %s in blue.", "text")
+
+	// More default foreground colors..
+	color.Red("We have red")
+	color.Yellow("Yellow color too!")
+	color.Magenta("And many others ..")
+
+	// Hi-intensity colors
+	color.HiGreen("Bright green color.")
+	color.HiBlack("Bright black means gray..")
+	color.HiWhite("Shiny white color!")
+
+However, there are times when custom color mixes are required. Below are some
+examples to create custom color objects and use the print functions of each
+separate color object.
+
+	// Create a new color object
+	c := color.New(color.FgCyan).Add(color.Underline)
+	c.Println("Prints cyan text with an underline.")
+
+	// Or just add them to New()
+	d := color.New(color.FgCyan, color.Bold)
+	d.Printf("This prints bold cyan %s\n", "too!.")
+
+
+	// Mix up foreground and background colors, create new mixes!
+	red := color.New(color.FgRed)
+
+	boldRed := red.Add(color.Bold)
+	boldRed.Println("This will print text in bold red.")
+
+	whiteBackground := red.Add(color.BgWhite)
+	whiteBackground.Println("Red text with White background.")
+
+	// Use your own io.Writer output
+	color.New(color.FgBlue).Fprintln(myWriter, "blue color!")
+
+	blue := color.New(color.FgBlue)
+	blue.Fprint(myWriter, "This will print text in blue.")
+
+You can create PrintXxx functions to simplify even more:
+
+	// Create a custom print function for convenient
+	red := color.New(color.FgRed).PrintfFunc()
+	red("warning")
+	red("error: %s", err)
+
+	// Mix up multiple attributes
+	notice := color.New(color.Bold, color.FgGreen).PrintlnFunc()
+	notice("don't forget this...")
+
+You can also FprintXxx functions to pass your own io.Writer:
+
+	blue := color.New(FgBlue).FprintfFunc()
+	blue(myWriter, "important notice: %s", stars)
+
+	// Mix up with multiple attributes
+	success := color.New(color.Bold, color.FgGreen).FprintlnFunc()
+	success(myWriter, don't forget this...")
+
+Or create SprintXxx functions to mix strings with other non-colorized strings:
+
+	yellow := New(FgYellow).SprintFunc()
+	red := New(FgRed).SprintFunc()
+
+	fmt.Printf("this is a %s and this is %s.\n", yellow("warning"), red("error"))
+
+	info := New(FgWhite, BgGreen).SprintFunc()
+	fmt.Printf("this %s rocks!\n", info("package"))
+
+Windows support is enabled by default. All Print functions work as intended.
+However, only for color.SprintXXX functions, user should use fmt.FprintXXX and
+set the output to color.Output:
+
+	fmt.Fprintf(color.Output, "Windows support: %s", color.GreenString("PASS"))
+
+	info := New(FgWhite, BgGreen).SprintFunc()
+	fmt.Fprintf(color.Output, "this %s rocks!\n", info("package"))
+
+Using with existing code is possible. Just use the Set() method to set the
+standard output to the given parameters. That way a rewrite of an existing
+code is not required.
+
+	// Use handy standard colors.
+	color.Set(color.FgYellow)
+
+	fmt.Println("Existing text will be now in Yellow")
+	fmt.Printf("This one %s\n", "too")
+
+	color.Unset() // don't forget to unset
+
+	// You can mix up parameters
+	color.Set(color.FgMagenta, color.Bold)
+	defer color.Unset() // use it in your function
+
+	fmt.Println("All text will be now bold magenta.")
+
+There might be a case where you want to disable color output (for example to
+pipe the standard output of your app to somewhere else). `Color` has support to
+disable colors both globally and for single color definition. For example
+suppose you have a CLI app and a `--no-color` bool flag. You can easily disable
+the color output with:
+
+	var flagNoColor = flag.Bool("no-color", false, "Disable color output")
+
+	if *flagNoColor {
+		color.NoColor = true // disables colorized output
+	}
+
+You can also disable the color by setting the NO_COLOR environment variable to any value.
+
+It also has support for single color definitions (local). You can
+disable/enable color output on the fly:
+
+	c := color.New(color.FgCyan)
+	c.Println("Prints cyan text")
+
+	c.DisableColor()
+	c.Println("This is printed without any color")
+
+	c.EnableColor()
+	c.Println("This prints again cyan...")
+*/
+package color

vendor/github.com/godbus/dbus/v5/CONTRIBUTING.md

+# How to Contribute
+
+## Getting Started
+
+- Fork the repository on GitHub
+- Read the [README](README.markdown) for build and test instructions
+- Play with the project, submit bugs, submit patches!
+
+## Contribution Flow
+
+This is a rough outline of what a contributor's workflow looks like:
+
+- Create a topic branch from where you want to base your work (usually master).
+- Make commits of logical units.
+- Make sure your commit messages are in the proper format (see below).
+- Push your changes to a topic branch in your fork of the repository.
+- Make sure the tests pass, and add any new tests as appropriate.
+- Submit a pull request to the original repository.
+
+Thanks for your contributions!
+
+### Format of the Commit Message
+
+We follow a rough convention for commit messages that is designed to answer two
+questions: what changed and why. The subject line should feature the what and
+the body of the commit should describe the why.
+
+```
+scripts: add the test-cluster command
+
+this uses tmux to setup a test cluster that you can easily kill and
+start for debugging.
+
+Fixes #38
+```
+
+The format can be described more formally as follows:
+
+```
+<subsystem>: <what changed>
+<BLANK LINE>
+<why this change was made>
+<BLANK LINE>
+<footer>
+```
+
+The first line is the subject and should be no longer than 70 characters, the
+second line is always blank, and other lines should be wrapped at 80 characters.
+This allows the message to be easier to read on GitHub as well as in various
+git tools.

vendor/github.com/godbus/dbus/v5/LICENSE

+Copyright (c) 2013, Georg Reinke (<guelfey at gmail dot com>), Google
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/godbus/dbus/v5/MAINTAINERS

+Brandon Philips <brandon@ifup.org> (@philips)
+Brian Waldon <brian@waldon.cc> (@bcwaldon)
+John Southworth <jsouthwo@brocade.com> (@jsouthworth)

vendor/github.com/godbus/dbus/v5/README.md

+![Build Status](https://github.com/godbus/dbus/workflows/Go/badge.svg)
+
+dbus
+----
+
+dbus is a simple library that implements native Go client bindings for the
+D-Bus message bus system.
+
+### Features
+
+* Complete native implementation of the D-Bus message protocol
+* Go-like API (channels for signals / asynchronous method calls, Goroutine-safe connections)
+* Subpackages that help with the introspection / property interfaces
+
+### Installation
+
+This packages requires Go 1.12 or later. It can be installed by running the command below:
+
+```
+go get github.com/godbus/dbus/v5
+```
+
+### Usage
+
+The complete package documentation and some simple examples are available at
+[godoc.org](http://godoc.org/github.com/godbus/dbus). Also, the
+[_examples](https://github.com/godbus/dbus/tree/master/_examples) directory
+gives a short overview over the basic usage. 
+
+#### Projects using godbus
+- [fyne](https://github.com/fyne-io/fyne) a cross platform GUI in Go inspired by Material Design.
+- [fynedesk](https://github.com/fyne-io/fynedesk) a full desktop environment for Linux/Unix using Fyne.
+- [go-bluetooth](https://github.com/muka/go-bluetooth) provides a bluetooth client over bluez dbus API.
+- [iwd](https://github.com/shibumi/iwd) go bindings for the internet wireless daemon "iwd".
+- [notify](https://github.com/esiqveland/notify) provides desktop notifications over dbus into a library.
+- [playerbm](https://github.com/altdesktop/playerbm) a bookmark utility for media players.
+
+Please note that the API is considered unstable for now and may change without
+further notice.
+
+### License
+
+go.dbus is available under the Simplified BSD License; see LICENSE for the full
+text.
+
+Nearly all of the credit for this library goes to github.com/guelfey/go.dbus.

vendor/github.com/godbus/dbus/v5/auth.go

+package dbus
+
+import (
+	"bufio"
+	"bytes"
+	"errors"
+	"io"
+	"os"
+	"strconv"
+)
+
+// AuthStatus represents the Status of an authentication mechanism.
+type AuthStatus byte
+
+const (
+	// AuthOk signals that authentication is finished; the next command
+	// from the server should be an OK.
+	AuthOk AuthStatus = iota
+
+	// AuthContinue signals that additional data is needed; the next command
+	// from the server should be a DATA.
+	AuthContinue
+
+	// AuthError signals an error; the server sent invalid data or some
+	// other unexpected thing happened and the current authentication
+	// process should be aborted.
+	AuthError
+)
+
+type authState byte
+
+const (
+	waitingForData authState = iota
+	waitingForOk
+	waitingForReject
+)
+
+// Auth defines the behaviour of an authentication mechanism.
+type Auth interface {
+	// Return the name of the mechanism, the argument to the first AUTH command
+	// and the next status.
+	FirstData() (name, resp []byte, status AuthStatus)
+
+	// Process the given DATA command, and return the argument to the DATA
+	// command and the next status. If len(resp) == 0, no DATA command is sent.
+	HandleData(data []byte) (resp []byte, status AuthStatus)
+}
+
+// Auth authenticates the connection, trying the given list of authentication
+// mechanisms (in that order). If nil is passed, the EXTERNAL and
+// DBUS_COOKIE_SHA1 mechanisms are tried for the current user. For private
+// connections, this method must be called before sending any messages to the
+// bus. Auth must not be called on shared connections.
+func (conn *Conn) Auth(methods []Auth) error {
+	if methods == nil {
+		uid := strconv.Itoa(os.Geteuid())
+		methods = []Auth{AuthExternal(uid), AuthCookieSha1(uid, getHomeDir())}
+	}
+	in := bufio.NewReader(conn.transport)
+	err := conn.transport.SendNullByte()
+	if err != nil {
+		return err
+	}
+	err = authWriteLine(conn.transport, []byte("AUTH"))
+	if err != nil {
+		return err
+	}
+	s, err := authReadLine(in)
+	if err != nil {
+		return err
+	}
+	if len(s) < 2 || !bytes.Equal(s[0], []byte("REJECTED")) {
+		return errors.New("dbus: authentication protocol error")
+	}
+	s = s[1:]
+	for _, v := range s {
+		for _, m := range methods {
+			if name, _, status := m.FirstData(); bytes.Equal(v, name) {
+				var ok bool
+				err = authWriteLine(conn.transport, []byte("AUTH"), v)
+				if err != nil {
+					return err
+				}
+				switch status {
+				case AuthOk:
+					err, ok = conn.tryAuth(m, waitingForOk, in)
+				case AuthContinue:
+					err, ok = conn.tryAuth(m, waitingForData, in)
+				default:
+					panic("dbus: invalid authentication status")
+				}
+				if err != nil {
+					return err
+				}
+				if ok {
+					if conn.transport.SupportsUnixFDs() {
+						err = authWriteLine(conn, []byte("NEGOTIATE_UNIX_FD"))
+						if err != nil {
+							return err
+						}
+						line, err := authReadLine(in)
+						if err != nil {
+							return err
+						}
+						switch {
+						case bytes.Equal(line[0], []byte("AGREE_UNIX_FD")):
+							conn.EnableUnixFDs()
+							conn.unixFD = true
+						case bytes.Equal(line[0], []byte("ERROR")):
+						default:
+							return errors.New("dbus: authentication protocol error")
+						}
+					}
+					err = authWriteLine(conn.transport, []byte("BEGIN"))
+					if err != nil {
+						return err
+					}
+					go conn.inWorker()
+					return nil
+				}
+			}
+		}
+	}
+	return errors.New("dbus: authentication failed")
+}
+
+// tryAuth tries to authenticate with m as the mechanism, using state as the
+// initial authState and in for reading input. It returns (nil, true) on
+// success, (nil, false) on a REJECTED and (someErr, false) if some other
+// error occurred.
+func (conn *Conn) tryAuth(m Auth, state authState, in *bufio.Reader) (error, bool) {
+	for {
+		s, err := authReadLine(in)
+		if err != nil {
+			return err, false
+		}
+		switch {
+		case state == waitingForData && string(s[0]) == "DATA":
+			if len(s) != 2 {
+				err = authWriteLine(conn.transport, []byte("ERROR"))
+				if err != nil {
+					return err, false
+				}
+				continue
+			}
+			data, status := m.HandleData(s[1])
+			switch status {
+			case AuthOk, AuthContinue:
+				if len(data) != 0 {
+					err = authWriteLine(conn.transport, []byte("DATA"), data)
+					if err != nil {
+						return err, false
+					}
+				}
+				if status == AuthOk {
+					state = waitingForOk
+				}
+			case AuthError:
+				err = authWriteLine(conn.transport, []byte("ERROR"))
+				if err != nil {
+					return err, false
+				}
+			}
+		case state == waitingForData && string(s[0]) == "REJECTED":
+			return nil, false
+		case state == waitingForData && string(s[0]) == "ERROR":
+			err = authWriteLine(conn.transport, []byte("CANCEL"))
+			if err != nil {
+				return err, false
+			}
+			state = waitingForReject
+		case state == waitingForData && string(s[0]) == "OK":
+			if len(s) != 2 {
+				err = authWriteLine(conn.transport, []byte("CANCEL"))
+				if err != nil {
+					return err, false
+				}
+				state = waitingForReject
+			} else {
+				conn.uuid = string(s[1])
+				return nil, true
+			}
+		case state == waitingForData:
+			err = authWriteLine(conn.transport, []byte("ERROR"))
+			if err != nil {
+				return err, false
+			}
+		case state == waitingForOk && string(s[0]) == "OK":
+			if len(s) != 2 {
+				err = authWriteLine(conn.transport, []byte("CANCEL"))
+				if err != nil {
+					return err, false
+				}
+				state = waitingForReject
+			} else {
+				conn.uuid = string(s[1])
+				return nil, true
+			}
+		case state == waitingForOk && string(s[0]) == "DATA":
+			err = authWriteLine(conn.transport, []byte("DATA"))
+			if err != nil {
+				return err, false
+			}
+		case state == waitingForOk && string(s[0]) == "REJECTED":
+			return nil, false
+		case state == waitingForOk && string(s[0]) == "ERROR":
+			err = authWriteLine(conn.transport, []byte("CANCEL"))
+			if err != nil {
+				return err, false
+			}
+			state = waitingForReject
+		case state == waitingForOk:
+			err = authWriteLine(conn.transport, []byte("ERROR"))
+			if err != nil {
+				return err, false
+			}
+		case state == waitingForReject && string(s[0]) == "REJECTED":
+			return nil, false
+		case state == waitingForReject:
+			return errors.New("dbus: authentication protocol error"), false
+		default:
+			panic("dbus: invalid auth state")
+		}
+	}
+}
+
+// authReadLine reads a line and separates it into its fields.
+func authReadLine(in *bufio.Reader) ([][]byte, error) {
+	data, err := in.ReadBytes('\n')
+	if err != nil {
+		return nil, err
+	}
+	data = bytes.TrimSuffix(data, []byte("\r\n"))
+	return bytes.Split(data, []byte{' '}), nil
+}
+
+// authWriteLine writes the given line in the authentication protocol format
+// (elements of data separated by a " " and terminated by "\r\n").
+func authWriteLine(out io.Writer, data ...[]byte) error {
+	buf := make([]byte, 0)
+	for i, v := range data {
+		buf = append(buf, v...)
+		if i != len(data)-1 {
+			buf = append(buf, ' ')
+		}
+	}
+	buf = append(buf, '\r')
+	buf = append(buf, '\n')
+	n, err := out.Write(buf)
+	if err != nil {
+		return err
+	}
+	if n != len(buf) {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}

vendor/github.com/godbus/dbus/v5/auth_anonymous.go

+package dbus
+
+// AuthAnonymous returns an Auth that uses the ANONYMOUS mechanism.
+func AuthAnonymous() Auth {
+	return &authAnonymous{}
+}
+
+type authAnonymous struct{}
+
+func (a *authAnonymous) FirstData() (name, resp []byte, status AuthStatus) {
+	return []byte("ANONYMOUS"), nil, AuthOk
+}
+
+func (a *authAnonymous) HandleData(data []byte) (resp []byte, status AuthStatus) {
+	return nil, AuthError
+}

vendor/github.com/godbus/dbus/v5/auth_external.go

+package dbus
+
+import (
+	"encoding/hex"
+)
+
+// AuthExternal returns an Auth that authenticates as the given user with the
+// EXTERNAL mechanism.
+func AuthExternal(user string) Auth {
+	return authExternal{user}
+}
+
+// AuthExternal implements the EXTERNAL authentication mechanism.
+type authExternal struct {
+	user string
+}
+
+func (a authExternal) FirstData() ([]byte, []byte, AuthStatus) {
+	b := make([]byte, 2*len(a.user))
+	hex.Encode(b, []byte(a.user))
+	return []byte("EXTERNAL"), b, AuthOk
+}
+
+func (a authExternal) HandleData(b []byte) ([]byte, AuthStatus) {
+	return nil, AuthError
+}

vendor/github.com/godbus/dbus/v5/auth_sha1.go

+package dbus
+
+import (
+	"bufio"
+	"bytes"
+	"crypto/rand"
+	"crypto/sha1"
+	"encoding/hex"
+	"os"
+)
+
+// AuthCookieSha1 returns an Auth that authenticates as the given user with the
+// DBUS_COOKIE_SHA1 mechanism. The home parameter should specify the home
+// directory of the user.
+func AuthCookieSha1(user, home string) Auth {
+	return authCookieSha1{user, home}
+}
+
+type authCookieSha1 struct {
+	user, home string
+}
+
+func (a authCookieSha1) FirstData() ([]byte, []byte, AuthStatus) {
+	b := make([]byte, 2*len(a.user))
+	hex.Encode(b, []byte(a.user))
+	return []byte("DBUS_COOKIE_SHA1"), b, AuthContinue
+}
+
+func (a authCookieSha1) HandleData(data []byte) ([]byte, AuthStatus) {
+	challenge := make([]byte, len(data)/2)
+	_, err := hex.Decode(challenge, data)
+	if err != nil {
+		return nil, AuthError
+	}
+	b := bytes.Split(challenge, []byte{' '})
+	if len(b) != 3 {
+		return nil, AuthError
+	}
+	context := b[0]
+	id := b[1]
+	svchallenge := b[2]
+	cookie := a.getCookie(context, id)
+	if cookie == nil {
+		return nil, AuthError
+	}
+	clchallenge := a.generateChallenge()
+	if clchallenge == nil {
+		return nil, AuthError
+	}
+	hash := sha1.New()
+	hash.Write(bytes.Join([][]byte{svchallenge, clchallenge, cookie}, []byte{':'}))
+	hexhash := make([]byte, 2*hash.Size())
+	hex.Encode(hexhash, hash.Sum(nil))
+	data = append(clchallenge, ' ')
+	data = append(data, hexhash...)
+	resp := make([]byte, 2*len(data))
+	hex.Encode(resp, data)
+	return resp, AuthOk
+}
+
+// getCookie searches for the cookie identified by id in context and returns
+// the cookie content or nil. (Since HandleData can't return a specific error,
+// but only whether an error occurred, this function also doesn't bother to
+// return an error.)
+func (a authCookieSha1) getCookie(context, id []byte) []byte {
+	file, err := os.Open(a.home + "/.dbus-keyrings/" + string(context))
+	if err != nil {
+		return nil
+	}
+	defer file.Close()
+	rd := bufio.NewReader(file)
+	for {
+		line, err := rd.ReadBytes('\n')
+		if err != nil {
+			return nil
+		}
+		line = line[:len(line)-1]
+		b := bytes.Split(line, []byte{' '})
+		if len(b) != 3 {
+			return nil
+		}
+		if bytes.Equal(b[0], id) {
+			return b[2]
+		}
+	}
+}
+
+// generateChallenge returns a random, hex-encoded challenge, or nil on error
+// (see above).
+func (a authCookieSha1) generateChallenge() []byte {
+	b := make([]byte, 16)
+	n, err := rand.Read(b)
+	if err != nil {
+		return nil
+	}
+	if n != 16 {
+		return nil
+	}
+	enc := make([]byte, 32)
+	hex.Encode(enc, b)
+	return enc
+}

vendor/github.com/godbus/dbus/v5/call.go

+package dbus
+
+import (
+	"context"
+	"errors"
+)
+
+var errSignature = errors.New("dbus: mismatched signature")
+
+// Call represents a pending or completed method call.
+type Call struct {
+	Destination string
+	Path        ObjectPath
+	Method      string
+	Args        []interface{}
+
+	// Strobes when the call is complete.
+	Done chan *Call
+
+	// After completion, the error status. If this is non-nil, it may be an
+	// error message from the peer (with Error as its type) or some other error.
+	Err error
+
+	// Holds the response once the call is done.
+	Body []interface{}
+
+	// ResponseSequence stores the sequence number of the DBus message containing
+	// the call response (or error). This can be compared to the sequence number
+	// of other call responses and signals on this connection to determine their
+	// relative ordering on the underlying DBus connection.
+	// For errors, ResponseSequence is populated only if the error came from a
+	// DBusMessage that was received or if there was an error receiving. In case of
+	// failure to make the call, ResponseSequence will be NoSequence.
+	ResponseSequence Sequence
+
+	// tracks context and canceler
+	ctx         context.Context
+	ctxCanceler context.CancelFunc
+}
+
+func (c *Call) Context() context.Context {
+	if c.ctx == nil {
+		return context.Background()
+	}
+
+	return c.ctx
+}
+
+func (c *Call) ContextCancel() {
+	if c.ctxCanceler != nil {
+		c.ctxCanceler()
+	}
+}
+
+// Store stores the body of the reply into the provided pointers. It returns
+// an error if the signatures of the body and retvalues don't match, or if
+// the error status is not nil.
+func (c *Call) Store(retvalues ...interface{}) error {
+	if c.Err != nil {
+		return c.Err
+	}
+
+	return Store(c.Body, retvalues...)
+}
+
+func (c *Call) done() {
+	c.Done <- c
+	c.ContextCancel()
+}

vendor/github.com/godbus/dbus/v5/conn_darwin.go

+package dbus
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+)
+
+const defaultSystemBusAddress = "unix:path=/opt/local/var/run/dbus/system_bus_socket"
+
+func getSessionBusPlatformAddress() (string, error) {
+	cmd := exec.Command("launchctl", "getenv", "DBUS_LAUNCHD_SESSION_BUS_SOCKET")
+	b, err := cmd.CombinedOutput()
+
+	if err != nil {
+		return "", err
+	}
+
+	if len(b) == 0 {
+		return "", errors.New("dbus: couldn't determine address of session bus")
+	}
+
+	return "unix:path=" + string(b[:len(b)-1]), nil
+}
+
+func getSystemBusPlatformAddress() string {
+	address := os.Getenv("DBUS_LAUNCHD_SESSION_BUS_SOCKET")
+	if address != "" {
+		return fmt.Sprintf("unix:path=%s", address)
+	}
+	return defaultSystemBusAddress
+}
+
+func tryDiscoverDbusSessionBusAddress() string {
+	return ""
+}

vendor/github.com/godbus/dbus/v5/conn_other.go

+// +build !darwin
+
+package dbus
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"os/user"
+	"path"
+	"strings"
+)
+
+var execCommand = exec.Command
+
+func getSessionBusPlatformAddress() (string, error) {
+	cmd := execCommand("dbus-launch")
+	b, err := cmd.CombinedOutput()
+
+	if err != nil {
+		return "", err
+	}
+
+	i := bytes.IndexByte(b, '=')
+	j := bytes.IndexByte(b, '\n')
+
+	if i == -1 || j == -1 || i > j {
+		return "", errors.New("dbus: couldn't determine address of session bus")
+	}
+
+	env, addr := string(b[0:i]), string(b[i+1:j])
+	os.Setenv(env, addr)
+
+	return addr, nil
+}
+
+// tryDiscoverDbusSessionBusAddress tries to discover an existing dbus session
+// and return the value of its DBUS_SESSION_BUS_ADDRESS.
+// It tries different techniques employed by different operating systems,
+// returning the first valid address it finds, or an empty string.
+//
+// * /run/user/<uid>/bus           if this exists, it *is* the bus socket. present on
+//                                 Ubuntu 18.04
+// * /run/user/<uid>/dbus-session: if this exists, it can be parsed for the bus
+//                                 address. present on Ubuntu 16.04
+//
+// See https://dbus.freedesktop.org/doc/dbus-launch.1.html
+func tryDiscoverDbusSessionBusAddress() string {
+	if runtimeDirectory, err := getRuntimeDirectory(); err == nil {
+
+		if runUserBusFile := path.Join(runtimeDirectory, "bus"); fileExists(runUserBusFile) {
+			// if /run/user/<uid>/bus exists, that file itself
+			// *is* the unix socket, so return its path
+			return fmt.Sprintf("unix:path=%s", EscapeBusAddressValue(runUserBusFile))
+		}
+		if runUserSessionDbusFile := path.Join(runtimeDirectory, "dbus-session"); fileExists(runUserSessionDbusFile) {
+			// if /run/user/<uid>/dbus-session exists, it's a
+			// text file // containing the address of the socket, e.g.:
+			// DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-E1c73yNqrG
+
+			if f, err := ioutil.ReadFile(runUserSessionDbusFile); err == nil {
+				fileContent := string(f)
+
+				prefix := "DBUS_SESSION_BUS_ADDRESS="
+
+				if strings.HasPrefix(fileContent, prefix) {
+					address := strings.TrimRight(strings.TrimPrefix(fileContent, prefix), "\n\r")
+					return address
+				}
+			}
+		}
+	}
+	return ""
+}
+
+func getRuntimeDirectory() (string, error) {
+	if currentUser, err := user.Current(); err != nil {
+		return "", err
+	} else {
+		return fmt.Sprintf("/run/user/%s", currentUser.Uid), nil
+	}
+}
+
+func fileExists(filename string) bool {
+	_, err := os.Stat(filename)
+	return !os.IsNotExist(err)
+}

vendor/github.com/godbus/dbus/v5/conn_unix.go

+//+build !windows,!solaris,!darwin
+
+package dbus
+
+import (
+	"os"
+)
+
+const defaultSystemBusAddress = "unix:path=/var/run/dbus/system_bus_socket"
+
+func getSystemBusPlatformAddress() string {
+	address := os.Getenv("DBUS_SYSTEM_BUS_ADDRESS")
+	if address != "" {
+		return address
+	}
+	return defaultSystemBusAddress
+}

vendor/github.com/godbus/dbus/v5/conn_windows.go

+//+build windows
+
+package dbus
+
+import "os"
+
+const defaultSystemBusAddress = "tcp:host=127.0.0.1,port=12434"
+
+func getSystemBusPlatformAddress() string {
+	address := os.Getenv("DBUS_SYSTEM_BUS_ADDRESS")
+	if address != "" {
+		return address
+	}
+	return defaultSystemBusAddress
+}

vendor/github.com/godbus/dbus/v5/decoder.go

+package dbus
+
+import (
+	"encoding/binary"
+	"io"
+	"reflect"
+)
+
+type decoder struct {
+	in    io.Reader
+	order binary.ByteOrder
+	pos   int
+	fds   []int
+}
+
+// newDecoder returns a new decoder that reads values from in. The input is
+// expected to be in the given byte order.
+func newDecoder(in io.Reader, order binary.ByteOrder, fds []int) *decoder {
+	dec := new(decoder)
+	dec.in = in
+	dec.order = order
+	dec.fds = fds
+	return dec
+}
+
+// align aligns the input to the given boundary and panics on error.
+func (dec *decoder) align(n int) {
+	if dec.pos%n != 0 {
+		newpos := (dec.pos + n - 1) & ^(n - 1)
+		empty := make([]byte, newpos-dec.pos)
+		if _, err := io.ReadFull(dec.in, empty); err != nil {
+			panic(err)
+		}
+		dec.pos = newpos
+	}
+}
+
+// Calls binary.Read(dec.in, dec.order, v) and panics on read errors.
+func (dec *decoder) binread(v interface{}) {
+	if err := binary.Read(dec.in, dec.order, v); err != nil {
+		panic(err)
+	}
+}
+
+func (dec *decoder) Decode(sig Signature) (vs []interface{}, err error) {
+	defer func() {
+		var ok bool
+		v := recover()
+		if err, ok = v.(error); ok {
+			if err == io.EOF || err == io.ErrUnexpectedEOF {
+				err = FormatError("unexpected EOF")
+			}
+		}
+	}()
+	vs = make([]interface{}, 0)
+	s := sig.str
+	for s != "" {
+		err, rem := validSingle(s, &depthCounter{})
+		if err != nil {
+			return nil, err
+		}
+		v := dec.decode(s[:len(s)-len(rem)], 0)
+		vs = append(vs, v)
+		s = rem
+	}
+	return vs, nil
+}
+
+func (dec *decoder) decode(s string, depth int) interface{} {
+	dec.align(alignment(typeFor(s)))
+	switch s[0] {
+	case 'y':
+		var b [1]byte
+		if _, err := dec.in.Read(b[:]); err != nil {
+			panic(err)
+		}
+		dec.pos++
+		return b[0]
+	case 'b':
+		i := dec.decode("u", depth).(uint32)
+		switch {
+		case i == 0:
+			return false
+		case i == 1:
+			return true
+		default:
+			panic(FormatError("invalid value for boolean"))
+		}
+	case 'n':
+		var i int16
+		dec.binread(&i)
+		dec.pos += 2
+		return i
+	case 'i':
+		var i int32
+		dec.binread(&i)
+		dec.pos += 4
+		return i
+	case 'x':
+		var i int64
+		dec.binread(&i)
+		dec.pos += 8
+		return i
+	case 'q':
+		var i uint16
+		dec.binread(&i)
+		dec.pos += 2
+		return i
+	case 'u':
+		var i uint32
+		dec.binread(&i)
+		dec.pos += 4
+		return i
+	case 't':
+		var i uint64
+		dec.binread(&i)
+		dec.pos += 8
+		return i
+	case 'd':
+		var f float64
+		dec.binread(&f)
+		dec.pos += 8
+		return f
+	case 's':
+		length := dec.decode("u", depth).(uint32)
+		b := make([]byte, int(length)+1)
+		if _, err := io.ReadFull(dec.in, b); err != nil {
+			panic(err)
+		}
+		dec.pos += int(length) + 1
+		return string(b[:len(b)-1])
+	case 'o':
+		return ObjectPath(dec.decode("s", depth).(string))
+	case 'g':
+		length := dec.decode("y", depth).(byte)
+		b := make([]byte, int(length)+1)
+		if _, err := io.ReadFull(dec.in, b); err != nil {
+			panic(err)
+		}
+		dec.pos += int(length) + 1
+		sig, err := ParseSignature(string(b[:len(b)-1]))
+		if err != nil {
+			panic(err)
+		}
+		return sig
+	case 'v':
+		if depth >= 64 {
+			panic(FormatError("input exceeds container depth limit"))
+		}
+		var variant Variant
+		sig := dec.decode("g", depth).(Signature)
+		if len(sig.str) == 0 {
+			panic(FormatError("variant signature is empty"))
+		}
+		err, rem := validSingle(sig.str, &depthCounter{})
+		if err != nil {
+			panic(err)
+		}
+		if rem != "" {
+			panic(FormatError("variant signature has multiple types"))
+		}
+		variant.sig = sig
+		variant.value = dec.decode(sig.str, depth+1)
+		return variant
+	case 'h':
+		idx := dec.decode("u", depth).(uint32)
+		if int(idx) < len(dec.fds) {
+			return UnixFD(dec.fds[idx])
+		}
+		return UnixFDIndex(idx)
+	case 'a':
+		if len(s) > 1 && s[1] == '{' {
+			ksig := s[2:3]
+			vsig := s[3 : len(s)-1]
+			v := reflect.MakeMap(reflect.MapOf(typeFor(ksig), typeFor(vsig)))
+			if depth >= 63 {
+				panic(FormatError("input exceeds container depth limit"))
+			}
+			length := dec.decode("u", depth).(uint32)
+			// Even for empty maps, the correct padding must be included
+			dec.align(8)
+			spos := dec.pos
+			for dec.pos < spos+int(length) {
+				dec.align(8)
+				if !isKeyType(v.Type().Key()) {
+					panic(InvalidTypeError{v.Type()})
+				}
+				kv := dec.decode(ksig, depth+2)
+				vv := dec.decode(vsig, depth+2)
+				v.SetMapIndex(reflect.ValueOf(kv), reflect.ValueOf(vv))
+			}
+			return v.Interface()
+		}
+		if depth >= 64 {
+			panic(FormatError("input exceeds container depth limit"))
+		}
+		sig := s[1:]
+		length := dec.decode("u", depth).(uint32)
+		// capacity can be determined only for fixed-size element types
+		var capacity int
+		if s := sigByteSize(sig); s != 0 {
+			capacity = int(length) / s
+		}
+		v := reflect.MakeSlice(reflect.SliceOf(typeFor(sig)), 0, capacity)
+		// Even for empty arrays, the correct padding must be included
+		align := alignment(typeFor(s[1:]))
+		if len(s) > 1 && s[1] == '(' {
+			//Special case for arrays of structs
+			//structs decode as a slice of interface{} values
+			//but the dbus alignment does not match this
+			align = 8
+		}
+		dec.align(align)
+		spos := dec.pos
+		for dec.pos < spos+int(length) {
+			ev := dec.decode(s[1:], depth+1)
+			v = reflect.Append(v, reflect.ValueOf(ev))
+		}
+		return v.Interface()
+	case '(':
+		if depth >= 64 {
+			panic(FormatError("input exceeds container depth limit"))
+		}
+		dec.align(8)
+		v := make([]interface{}, 0)
+		s = s[1 : len(s)-1]
+		for s != "" {
+			err, rem := validSingle(s, &depthCounter{})
+			if err != nil {
+				panic(err)
+			}
+			ev := dec.decode(s[:len(s)-len(rem)], depth+1)
+			v = append(v, ev)
+			s = rem
+		}
+		return v
+	default:
+		panic(SignatureError{Sig: s})
+	}
+}
+
+// sigByteSize tries to calculates size of the given signature in bytes.
+//
+// It returns zero when it can't, for example when it contains non-fixed size
+// types such as strings, maps and arrays that require reading of the transmitted
+// data, for that we would need to implement the unread method for Decoder first.
+func sigByteSize(sig string) int {
+	var total int
+	for offset := 0; offset < len(sig); {
+		switch sig[offset] {
+		case 'y':
+			total += 1
+			offset += 1
+		case 'n', 'q':
+			total += 2
+			offset += 1
+		case 'b', 'i', 'u', 'h':
+			total += 4
+			offset += 1
+		case 'x', 't', 'd':
+			total += 8
+			offset += 1
+		case '(':
+			i := 1
+			depth := 1
+			for i < len(sig[offset:]) && depth != 0 {
+				if sig[offset+i] == '(' {
+					depth++
+				} else if sig[offset+i] == ')' {
+					depth--
+				}
+				i++
+			}
+			s := sigByteSize(sig[offset+1 : offset+i-1])
+			if s == 0 {
+				return 0
+			}
+			total += s
+			offset += i
+		default:
+			return 0
+		}
+	}
+	return total
+}
+
+// A FormatError is an error in the wire format.
+type FormatError string
+
+func (e FormatError) Error() string {
+	return "dbus: wire format error: " + string(e)
+}

vendor/github.com/godbus/dbus/v5/default_handler.go

+package dbus
+
+import (
+	"bytes"
+	"reflect"
+	"strings"
+	"sync"
+)
+
+func newIntrospectIntf(h *defaultHandler) *exportedIntf {
+	methods := make(map[string]Method)
+	methods["Introspect"] = exportedMethod{
+		reflect.ValueOf(func(msg Message) (string, *Error) {
+			path := msg.Headers[FieldPath].value.(ObjectPath)
+			return h.introspectPath(path), nil
+		}),
+	}
+	return newExportedIntf(methods, true)
+}
+
+//NewDefaultHandler returns an instance of the default
+//call handler. This is useful if you want to implement only
+//one of the two handlers but not both.
+//
+// Deprecated: this is the default value, don't use it, it will be unexported.
+func NewDefaultHandler() *defaultHandler {
+	h := &defaultHandler{
+		objects:     make(map[ObjectPath]*exportedObj),
+		defaultIntf: make(map[string]*exportedIntf),
+	}
+	h.defaultIntf["org.freedesktop.DBus.Introspectable"] = newIntrospectIntf(h)
+	return h
+}
+
+type defaultHandler struct {
+	sync.RWMutex
+	objects     map[ObjectPath]*exportedObj
+	defaultIntf map[string]*exportedIntf
+}
+
+func (h *defaultHandler) PathExists(path ObjectPath) bool {
+	_, ok := h.objects[path]
+	return ok
+}
+
+func (h *defaultHandler) introspectPath(path ObjectPath) string {
+	subpath := make(map[string]struct{})
+	var xml bytes.Buffer
+	xml.WriteString("<node>")
+	for obj := range h.objects {
+		p := string(path)
+		if p != "/" {
+			p += "/"
+		}
+		if strings.HasPrefix(string(obj), p) {
+			node_name := strings.Split(string(obj[len(p):]), "/")[0]
+			subpath[node_name] = struct{}{}
+		}
+	}
+	for s := range subpath {
+		xml.WriteString("\n\t<node name=\"" + s + "\"/>")
+	}
+	xml.WriteString("\n</node>")
+	return xml.String()
+}
+
+func (h *defaultHandler) LookupObject(path ObjectPath) (ServerObject, bool) {
+	h.RLock()
+	defer h.RUnlock()
+	object, ok := h.objects[path]
+	if ok {
+		return object, ok
+	}
+
+	// If an object wasn't found for this exact path,
+	// look for a matching subtree registration
+	subtreeObject := newExportedObject()
+	path = path[:strings.LastIndex(string(path), "/")]
+	for len(path) > 0 {
+		object, ok = h.objects[path]
+		if ok {
+			for name, iface := range object.interfaces {
+				// Only include this handler if it registered for the subtree
+				if iface.isFallbackInterface() {
+					subtreeObject.interfaces[name] = iface
+				}
+			}
+			break
+		}
+
+		path = path[:strings.LastIndex(string(path), "/")]
+	}
+
+	for name, intf := range h.defaultIntf {
+		if _, exists := subtreeObject.interfaces[name]; exists {
+			continue
+		}
+		subtreeObject.interfaces[name] = intf
+	}
+
+	return subtreeObject, true
+}
+
+func (h *defaultHandler) AddObject(path ObjectPath, object *exportedObj) {
+	h.Lock()
+	h.objects[path] = object
+	h.Unlock()
+}
+
+func (h *defaultHandler) DeleteObject(path ObjectPath) {
+	h.Lock()
+	delete(h.objects, path)
+	h.Unlock()
+}
+
+type exportedMethod struct {
+	reflect.Value
+}
+
+func (m exportedMethod) Call(args ...interface{}) ([]interface{}, error) {
+	t := m.Type()
+
+	params := make([]reflect.Value, len(args))
+	for i := 0; i < len(args); i++ {
+		params[i] = reflect.ValueOf(args[i]).Elem()
+	}
+
+	ret := m.Value.Call(params)
+	var err error
+	nilErr := false // The reflection will find almost-nils, let's only pass back clean ones!
+	if t.NumOut() > 0 {
+		if e, ok := ret[t.NumOut()-1].Interface().(*Error); ok { // godbus *Error
+			nilErr = ret[t.NumOut()-1].IsNil()
+			ret = ret[:t.NumOut()-1]
+			err = e
+		} else if ret[t.NumOut()-1].Type().Implements(errType) { // Go error
+			i := ret[t.NumOut()-1].Interface()
+			if i == nil {
+				nilErr = ret[t.NumOut()-1].IsNil()
+			} else {
+				err = i.(error)
+			}
+			ret = ret[:t.NumOut()-1]
+		}
+	}
+	out := make([]interface{}, len(ret))
+	for i, val := range ret {
+		out[i] = val.Interface()
+	}
+	if nilErr || err == nil {
+		//concrete type to interface nil is a special case
+		return out, nil
+	}
+	return out, err
+}
+
+func (m exportedMethod) NumArguments() int {
+	return m.Value.Type().NumIn()
+}
+
+func (m exportedMethod) ArgumentValue(i int) interface{} {
+	return reflect.Zero(m.Type().In(i)).Interface()
+}
+
+func (m exportedMethod) NumReturns() int {
+	return m.Value.Type().NumOut()
+}
+
+func (m exportedMethod) ReturnValue(i int) interface{} {
+	return reflect.Zero(m.Type().Out(i)).Interface()
+}
+
+func newExportedObject() *exportedObj {
+	return &exportedObj{
+		interfaces: make(map[string]*exportedIntf),
+	}
+}
+
+type exportedObj struct {
+	mu         sync.RWMutex
+	interfaces map[string]*exportedIntf
+}
+
+func (obj *exportedObj) LookupInterface(name string) (Interface, bool) {
+	if name == "" {
+		return obj, true
+	}
+	obj.mu.RLock()
+	defer obj.mu.RUnlock()
+	intf, exists := obj.interfaces[name]
+	return intf, exists
+}
+
+func (obj *exportedObj) AddInterface(name string, iface *exportedIntf) {
+	obj.mu.Lock()
+	defer obj.mu.Unlock()
+	obj.interfaces[name] = iface
+}
+
+func (obj *exportedObj) DeleteInterface(name string) {
+	obj.mu.Lock()
+	defer obj.mu.Unlock()
+	delete(obj.interfaces, name)
+}
+
+func (obj *exportedObj) LookupMethod(name string) (Method, bool) {
+	obj.mu.RLock()
+	defer obj.mu.RUnlock()
+	for _, intf := range obj.interfaces {
+		method, exists := intf.LookupMethod(name)
+		if exists {
+			return method, exists
+		}
+	}
+	return nil, false
+}
+
+func (obj *exportedObj) isFallbackInterface() bool {
+	return false
+}
+
+func newExportedIntf(methods map[string]Method, includeSubtree bool) *exportedIntf {
+	return &exportedIntf{
+		methods:        methods,
+		includeSubtree: includeSubtree,
+	}
+}
+
+type exportedIntf struct {
+	methods map[string]Method
+
+	// Whether or not this export is for the entire subtree
+	includeSubtree bool
+}
+
+func (obj *exportedIntf) LookupMethod(name string) (Method, bool) {
+	out, exists := obj.methods[name]
+	return out, exists
+}
+
+func (obj *exportedIntf) isFallbackInterface() bool {
+	return obj.includeSubtree
+}
+
+//NewDefaultSignalHandler returns an instance of the default
+//signal handler. This is useful if you want to implement only
+//one of the two handlers but not both.
+//
+// Deprecated: this is the default value, don't use it, it will be unexported.
+func NewDefaultSignalHandler() *defaultSignalHandler {
+	return &defaultSignalHandler{}
+}
+
+type defaultSignalHandler struct {
+	mu      sync.RWMutex
+	closed  bool
+	signals []*signalChannelData
+}
+
+func (sh *defaultSignalHandler) DeliverSignal(intf, name string, signal *Signal) {
+	sh.mu.RLock()
+	defer sh.mu.RUnlock()
+	if sh.closed {
+		return
+	}
+	for _, scd := range sh.signals {
+		scd.deliver(signal)
+	}
+}
+
+func (sh *defaultSignalHandler) Terminate() {
+	sh.mu.Lock()
+	defer sh.mu.Unlock()
+	if sh.closed {
+		return
+	}
+
+	for _, scd := range sh.signals {
+		scd.close()
+		close(scd.ch)
+	}
+	sh.closed = true
+	sh.signals = nil
+}
+
+func (sh *defaultSignalHandler) AddSignal(ch chan<- *Signal) {
+	sh.mu.Lock()
+	defer sh.mu.Unlock()
+	if sh.closed {
+		return
+	}
+	sh.signals = append(sh.signals, &signalChannelData{
+		ch:   ch,
+		done: make(chan struct{}),
+	})
+}
+
+func (sh *defaultSignalHandler) RemoveSignal(ch chan<- *Signal) {
+	sh.mu.Lock()
+	defer sh.mu.Unlock()
+	if sh.closed {
+		return
+	}
+	for i := len(sh.signals) - 1; i >= 0; i-- {
+		if ch == sh.signals[i].ch {
+			sh.signals[i].close()
+			copy(sh.signals[i:], sh.signals[i+1:])
+			sh.signals[len(sh.signals)-1] = nil
+			sh.signals = sh.signals[:len(sh.signals)-1]
+		}
+	}
+}
+
+type signalChannelData struct {
+	wg   sync.WaitGroup
+	ch   chan<- *Signal
+	done chan struct{}
+}
+
+func (scd *signalChannelData) deliver(signal *Signal) {
+	select {
+	case scd.ch <- signal:
+	case <-scd.done:
+		return
+	default:
+		scd.wg.Add(1)
+		go scd.deferredDeliver(signal)
+	}
+}
+
+func (scd *signalChannelData) deferredDeliver(signal *Signal) {
+	select {
+	case scd.ch <- signal:
+	case <-scd.done:
+	}
+	scd.wg.Done()
+}
+
+func (scd *signalChannelData) close() {
+	close(scd.done)
+	scd.wg.Wait() // wait until all spawned goroutines return
+}

vendor/github.com/godbus/dbus/v5/doc.go

+/*
+Package dbus implements bindings to the D-Bus message bus system.
+
+To use the message bus API, you first need to connect to a bus (usually the
+session or system bus). The acquired connection then can be used to call methods
+on remote objects and emit or receive signals. Using the Export method, you can
+arrange D-Bus methods calls to be directly translated to method calls on a Go
+value.
+
+Conversion Rules
+
+For outgoing messages, Go types are automatically converted to the
+corresponding D-Bus types. See the official specification at
+https://dbus.freedesktop.org/doc/dbus-specification.html#type-system for more
+information on the D-Bus type system. The following types are directly encoded
+as their respective D-Bus equivalents:
+
+     Go type     | D-Bus type
+     ------------+-----------
+     byte        | BYTE
+     bool        | BOOLEAN
+     int16       | INT16
+     uint16      | UINT16
+     int         | INT32
+     uint        | UINT32
+     int32       | INT32
+     uint32      | UINT32
+     int64       | INT64
+     uint64      | UINT64
+     float64     | DOUBLE
+     string      | STRING
+     ObjectPath  | OBJECT_PATH
+     Signature   | SIGNATURE
+     Variant     | VARIANT
+     interface{} | VARIANT
+     UnixFDIndex | UNIX_FD
+
+Slices and arrays encode as ARRAYs of their element type.
+
+Maps encode as DICTs, provided that their key type can be used as a key for
+a DICT.
+
+Structs other than Variant and Signature encode as a STRUCT containing their
+exported fields in order. Fields whose tags contain `dbus:"-"` and unexported
+fields will be skipped.
+
+Pointers encode as the value they're pointed to.
+
+Types convertible to one of the base types above will be mapped as the
+base type.
+
+Trying to encode any other type or a slice, map or struct containing an
+unsupported type will result in an InvalidTypeError.
+
+For incoming messages, the inverse of these rules are used, with the exception
+of STRUCTs. Incoming STRUCTS are represented as a slice of empty interfaces
+containing the struct fields in the correct order. The Store function can be
+used to convert such values to Go structs.
+
+Unix FD passing
+
+Handling Unix file descriptors deserves special mention. To use them, you should
+first check that they are supported on a connection by calling SupportsUnixFDs.
+If it returns true, all method of Connection will translate messages containing
+UnixFD's to messages that are accompanied by the given file descriptors with the
+UnixFD values being substituted by the correct indices. Similarly, the indices
+of incoming messages are automatically resolved. It shouldn't be necessary to use
+UnixFDIndex.
+
+*/
+package dbus

vendor/github.com/godbus/dbus/v5/encoder.go

+package dbus
+
+import (
+	"bytes"
+	"encoding/binary"
+	"io"
+	"reflect"
+	"strings"
+	"unicode/utf8"
+)
+
+// An encoder encodes values to the D-Bus wire format.
+type encoder struct {
+	out   io.Writer
+	fds   []int
+	order binary.ByteOrder
+	pos   int
+}
+
+// NewEncoder returns a new encoder that writes to out in the given byte order.
+func newEncoder(out io.Writer, order binary.ByteOrder, fds []int) *encoder {
+	enc := newEncoderAtOffset(out, 0, order, fds)
+	return enc
+}
+
+// newEncoderAtOffset returns a new encoder that writes to out in the given
+// byte order. Specify the offset to initialize pos for proper alignment
+// computation.
+func newEncoderAtOffset(out io.Writer, offset int, order binary.ByteOrder, fds []int) *encoder {
+	enc := new(encoder)
+	enc.out = out
+	enc.order = order
+	enc.pos = offset
+	enc.fds = fds
+	return enc
+}
+
+// Aligns the next output to be on a multiple of n. Panics on write errors.
+func (enc *encoder) align(n int) {
+	pad := enc.padding(0, n)
+	if pad > 0 {
+		empty := make([]byte, pad)
+		if _, err := enc.out.Write(empty); err != nil {
+			panic(err)
+		}
+		enc.pos += pad
+	}
+}
+
+// pad returns the number of bytes of padding, based on current position and additional offset.
+// and alignment.
+func (enc *encoder) padding(offset, algn int) int {
+	abs := enc.pos + offset
+	if abs%algn != 0 {
+		newabs := (abs + algn - 1) & ^(algn - 1)
+		return newabs - abs
+	}
+	return 0
+}
+
+// Calls binary.Write(enc.out, enc.order, v) and panics on write errors.
+func (enc *encoder) binwrite(v interface{}) {
+	if err := binary.Write(enc.out, enc.order, v); err != nil {
+		panic(err)
+	}
+}
+
+// Encode encodes the given values to the underlying reader. All written values
+// are aligned properly as required by the D-Bus spec.
+func (enc *encoder) Encode(vs ...interface{}) (err error) {
+	defer func() {
+		err, _ = recover().(error)
+	}()
+	for _, v := range vs {
+		enc.encode(reflect.ValueOf(v), 0)
+	}
+	return nil
+}
+
+// encode encodes the given value to the writer and panics on error. depth holds
+// the depth of the container nesting.
+func (enc *encoder) encode(v reflect.Value, depth int) {
+	if depth > 64 {
+		panic(FormatError("input exceeds depth limitation"))
+	}
+	enc.align(alignment(v.Type()))
+	switch v.Kind() {
+	case reflect.Uint8:
+		var b [1]byte
+		b[0] = byte(v.Uint())
+		if _, err := enc.out.Write(b[:]); err != nil {
+			panic(err)
+		}
+		enc.pos++
+	case reflect.Bool:
+		if v.Bool() {
+			enc.encode(reflect.ValueOf(uint32(1)), depth)
+		} else {
+			enc.encode(reflect.ValueOf(uint32(0)), depth)
+		}
+	case reflect.Int16:
+		enc.binwrite(int16(v.Int()))
+		enc.pos += 2
+	case reflect.Uint16:
+		enc.binwrite(uint16(v.Uint()))
+		enc.pos += 2
+	case reflect.Int, reflect.Int32:
+		if v.Type() == unixFDType {
+			fd := v.Int()
+			idx := len(enc.fds)
+			enc.fds = append(enc.fds, int(fd))
+			enc.binwrite(uint32(idx))
+		} else {
+			enc.binwrite(int32(v.Int()))
+		}
+		enc.pos += 4
+	case reflect.Uint, reflect.Uint32:
+		enc.binwrite(uint32(v.Uint()))
+		enc.pos += 4
+	case reflect.Int64:
+		enc.binwrite(v.Int())
+		enc.pos += 8
+	case reflect.Uint64:
+		enc.binwrite(v.Uint())
+		enc.pos += 8
+	case reflect.Float64:
+		enc.binwrite(v.Float())
+		enc.pos += 8
+	case reflect.String:
+		str := v.String()
+		if !utf8.ValidString(str) {
+			panic(FormatError("input has a not-utf8 char in string"))
+		}
+		if strings.IndexByte(str, byte(0)) != -1 {
+			panic(FormatError("input has a null char('\\000') in string"))
+		}
+		if v.Type() == objectPathType {
+			if !ObjectPath(str).IsValid() {
+				panic(FormatError("invalid object path"))
+			}
+		}
+		enc.encode(reflect.ValueOf(uint32(len(str))), depth)
+		b := make([]byte, v.Len()+1)
+		copy(b, str)
+		b[len(b)-1] = 0
+		n, err := enc.out.Write(b)
+		if err != nil {
+			panic(err)
+		}
+		enc.pos += n
+	case reflect.Ptr:
+		enc.encode(v.Elem(), depth)
+	case reflect.Slice, reflect.Array:
+		// Lookahead offset: 4 bytes for uint32 length (with alignment),
+		// plus alignment for elements.
+		n := enc.padding(0, 4) + 4
+		offset := enc.pos + n + enc.padding(n, alignment(v.Type().Elem()))
+
+		var buf bytes.Buffer
+		bufenc := newEncoderAtOffset(&buf, offset, enc.order, enc.fds)
+
+		for i := 0; i < v.Len(); i++ {
+			bufenc.encode(v.Index(i), depth+1)
+		}
+
+		if buf.Len() > 1<<26 {
+			panic(FormatError("input exceeds array size limitation"))
+		}
+
+		enc.fds = bufenc.fds
+		enc.encode(reflect.ValueOf(uint32(buf.Len())), depth)
+		length := buf.Len()
+		enc.align(alignment(v.Type().Elem()))
+		if _, err := buf.WriteTo(enc.out); err != nil {
+			panic(err)
+		}
+		enc.pos += length
+	case reflect.Struct:
+		switch t := v.Type(); t {
+		case signatureType:
+			str := v.Field(0)
+			enc.encode(reflect.ValueOf(byte(str.Len())), depth)
+			b := make([]byte, str.Len()+1)
+			copy(b, str.String())
+			b[len(b)-1] = 0
+			n, err := enc.out.Write(b)
+			if err != nil {
+				panic(err)
+			}
+			enc.pos += n
+		case variantType:
+			variant := v.Interface().(Variant)
+			enc.encode(reflect.ValueOf(variant.sig), depth+1)
+			enc.encode(reflect.ValueOf(variant.value), depth+1)
+		default:
+			for i := 0; i < v.Type().NumField(); i++ {
+				field := t.Field(i)
+				if field.PkgPath == "" && field.Tag.Get("dbus") != "-" {
+					enc.encode(v.Field(i), depth+1)
+				}
+			}
+		}
+	case reflect.Map:
+		// Maps are arrays of structures, so they actually increase the depth by
+		// 2.
+		if !isKeyType(v.Type().Key()) {
+			panic(InvalidTypeError{v.Type()})
+		}
+		keys := v.MapKeys()
+		// Lookahead offset: 4 bytes for uint32 length (with alignment),
+		// plus 8-byte alignment
+		n := enc.padding(0, 4) + 4
+		offset := enc.pos + n + enc.padding(n, 8)
+
+		var buf bytes.Buffer
+		bufenc := newEncoderAtOffset(&buf, offset, enc.order, enc.fds)
+		for _, k := range keys {
+			bufenc.align(8)
+			bufenc.encode(k, depth+2)
+			bufenc.encode(v.MapIndex(k), depth+2)
+		}
+		enc.fds = bufenc.fds
+		enc.encode(reflect.ValueOf(uint32(buf.Len())), depth)
+		length := buf.Len()
+		enc.align(8)
+		if _, err := buf.WriteTo(enc.out); err != nil {
+			panic(err)
+		}
+		enc.pos += length
+	case reflect.Interface:
+		enc.encode(reflect.ValueOf(MakeVariant(v.Interface())), depth)
+	default:
+		panic(InvalidTypeError{v.Type()})
+	}
+}

vendor/github.com/godbus/dbus/v5/escape.go

+package dbus
+
+import "net/url"
+
+// EscapeBusAddressValue implements a requirement to escape the values
+// in D-Bus server addresses, as defined by the D-Bus specification at
+// https://dbus.freedesktop.org/doc/dbus-specification.html#addresses.
+func EscapeBusAddressValue(val string) string {
+	toEsc := strNeedsEscape(val)
+	if toEsc == 0 {
+		// Avoid unneeded allocation/copying.
+		return val
+	}
+
+	// Avoid allocation for short paths.
+	var buf [64]byte
+	var out []byte
+	// Every to-be-escaped byte needs 2 extra bytes.
+	required := len(val) + 2*toEsc
+	if required <= len(buf) {
+		out = buf[:required]
+	} else {
+		out = make([]byte, required)
+	}
+
+	j := 0
+	for i := 0; i < len(val); i++ {
+		if ch := val[i]; needsEscape(ch) {
+			// Convert ch to %xx, where xx is hex value.
+			out[j] = '%'
+			out[j+1] = hexchar(ch >> 4)
+			out[j+2] = hexchar(ch & 0x0F)
+			j += 3
+		} else {
+			out[j] = ch
+			j++
+		}
+	}
+
+	return string(out)
+}
+
+// UnescapeBusAddressValue unescapes values in D-Bus server addresses,
+// as defined by the D-Bus specification at
+// https://dbus.freedesktop.org/doc/dbus-specification.html#addresses.
+func UnescapeBusAddressValue(val string) (string, error) {
+	// Looks like url.PathUnescape does exactly what is required.
+	return url.PathUnescape(val)
+}
+
+// hexchar returns an octal representation of a n, where n < 16.
+// For invalid values of n, the function panics.
+func hexchar(n byte) byte {
+	const hex = "0123456789abcdef"
+
+	// For n >= len(hex), runtime will panic.
+	return hex[n]
+}
+
+// needsEscape tells if a byte is NOT one of optionally-escaped bytes.
+func needsEscape(c byte) bool {
+	if 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || '0' <= c && c <= '9' {
+		return false
+	}
+	switch c {
+	case '-', '_', '/', '\\', '.', '*':
+		return false
+	}
+
+	return true
+}
+
+// strNeedsEscape tells how many bytes in the string need escaping.
+func strNeedsEscape(val string) int {
+	count := 0
+
+	for i := 0; i < len(val); i++ {
+		if needsEscape(val[i]) {
+			count++
+		}
+	}
+
+	return count
+}

vendor/github.com/godbus/dbus/v5/homedir.go

+package dbus
+
+import (
+	"os"
+	"os/user"
+)
+
+// Get returns the home directory of the current user, which is usually the
+// value of HOME environment variable. In case it is not set or empty, os/user
+// package is used.
+//
+// If linking statically with cgo enabled against glibc, make sure the
+// osusergo build tag is used.
+//
+// If needing to do nss lookups, do not disable cgo or set osusergo.
+func getHomeDir() string {
+	homeDir := os.Getenv("HOME")
+	if homeDir != "" {
+		return homeDir
+	}
+	if u, err := user.Current(); err == nil {
+		return u.HomeDir
+	}
+	return "/"
+}

vendor/github.com/godbus/dbus/v5/match.go

+package dbus
+
+import (
+	"strconv"
+	"strings"
+)
+
+// MatchOption specifies option for dbus routing match rule. Options can be constructed with WithMatch* helpers.
+// For full list of available options consult
+// https://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-routing-match-rules
+type MatchOption struct {
+	key   string
+	value string
+}
+
+func formatMatchOptions(options []MatchOption) string {
+	items := make([]string, 0, len(options))
+	for _, option := range options {
+		items = append(items, option.key+"='"+option.value+"'")
+	}
+	return strings.Join(items, ",")
+}
+
+// WithMatchOption creates match option with given key and value
+func WithMatchOption(key, value string) MatchOption {
+	return MatchOption{key, value}
+}
+
+// doesn't make sense to export this option because clients can only
+// subscribe to messages with signal type.
+func withMatchType(typ string) MatchOption {
+	return WithMatchOption("type", typ)
+}
+
+// WithMatchSender sets sender match option.
+func WithMatchSender(sender string) MatchOption {
+	return WithMatchOption("sender", sender)
+}
+
+// WithMatchSender sets interface match option.
+func WithMatchInterface(iface string) MatchOption {
+	return WithMatchOption("interface", iface)
+}
+
+// WithMatchMember sets member match option.
+func WithMatchMember(member string) MatchOption {
+	return WithMatchOption("member", member)
+}
+
+// WithMatchObjectPath creates match option that filters events based on given path
+func WithMatchObjectPath(path ObjectPath) MatchOption {
+	return WithMatchOption("path", string(path))
+}
+
+// WithMatchPathNamespace sets path_namespace match option.
+func WithMatchPathNamespace(namespace ObjectPath) MatchOption {
+	return WithMatchOption("path_namespace", string(namespace))
+}
+
+// WithMatchDestination sets destination match option.
+func WithMatchDestination(destination string) MatchOption {
+	return WithMatchOption("destination", destination)
+}
+
+// WithMatchArg sets argN match option, range of N is 0 to 63.
+func WithMatchArg(argIdx int, value string) MatchOption {
+	if argIdx < 0 || argIdx > 63 {
+		panic("range of argument index is 0 to 63")
+	}
+	return WithMatchOption("arg"+strconv.Itoa(argIdx), value)
+}
+
+// WithMatchArgPath sets argN path match option, range of N is 0 to 63.
+func WithMatchArgPath(argIdx int, path string) MatchOption {
+	if argIdx < 0 || argIdx > 63 {
+		panic("range of argument index is 0 to 63")
+	}
+	return WithMatchOption("arg"+strconv.Itoa(argIdx)+"path", path)
+}
+
+// WithMatchArg0Namespace sets arg0namespace match option.
+func WithMatchArg0Namespace(arg0Namespace string) MatchOption {
+	return WithMatchOption("arg0namespace", arg0Namespace)
+}
+
+// WithMatchEavesdrop sets eavesdrop match option.
+func WithMatchEavesdrop(eavesdrop bool) MatchOption {
+	return WithMatchOption("eavesdrop", strconv.FormatBool(eavesdrop))
+}

vendor/github.com/godbus/dbus/v5/object.go

+package dbus
+
+import (
+	"context"
+	"errors"
+	"strings"
+)
+
+// BusObject is the interface of a remote object on which methods can be
+// invoked.
+type BusObject interface {
+	Call(method string, flags Flags, args ...interface{}) *Call
+	CallWithContext(ctx context.Context, method string, flags Flags, args ...interface{}) *Call
+	Go(method string, flags Flags, ch chan *Call, args ...interface{}) *Call
+	GoWithContext(ctx context.Context, method string, flags Flags, ch chan *Call, args ...interface{}) *Call
+	AddMatchSignal(iface, member string, options ...MatchOption) *Call
+	RemoveMatchSignal(iface, member string, options ...MatchOption) *Call
+	GetProperty(p string) (Variant, error)
+	StoreProperty(p string, value interface{}) error
+	SetProperty(p string, v interface{}) error
+	Destination() string
+	Path() ObjectPath
+}
+
+// Object represents a remote object on which methods can be invoked.
+type Object struct {
+	conn *Conn
+	dest string
+	path ObjectPath
+}
+
+// Call calls a method with (*Object).Go and waits for its reply.
+func (o *Object) Call(method string, flags Flags, args ...interface{}) *Call {
+	return <-o.createCall(context.Background(), method, flags, make(chan *Call, 1), args...).Done
+}
+
+// CallWithContext acts like Call but takes a context
+func (o *Object) CallWithContext(ctx context.Context, method string, flags Flags, args ...interface{}) *Call {
+	return <-o.createCall(ctx, method, flags, make(chan *Call, 1), args...).Done
+}
+
+// AddMatchSignal subscribes BusObject to signals from specified interface,
+// method (member). Additional filter rules can be added via WithMatch* option constructors.
+// Note: To filter events by object path you have to specify this path via an option.
+//
+// Deprecated: use (*Conn) AddMatchSignal instead.
+func (o *Object) AddMatchSignal(iface, member string, options ...MatchOption) *Call {
+	base := []MatchOption{
+		withMatchType("signal"),
+		WithMatchInterface(iface),
+		WithMatchMember(member),
+	}
+
+	options = append(base, options...)
+	return o.conn.BusObject().Call(
+		"org.freedesktop.DBus.AddMatch",
+		0,
+		formatMatchOptions(options),
+	)
+}
+
+// RemoveMatchSignal unsubscribes BusObject from signals from specified interface,
+// method (member). Additional filter rules can be added via WithMatch* option constructors
+//
+// Deprecated: use (*Conn) RemoveMatchSignal instead.
+func (o *Object) RemoveMatchSignal(iface, member string, options ...MatchOption) *Call {
+	base := []MatchOption{
+		withMatchType("signal"),
+		WithMatchInterface(iface),
+		WithMatchMember(member),
+	}
+
+	options = append(base, options...)
+	return o.conn.BusObject().Call(
+		"org.freedesktop.DBus.RemoveMatch",
+		0,
+		formatMatchOptions(options),
+	)
+}
+
+// Go calls a method with the given arguments asynchronously. It returns a
+// Call structure representing this method call. The passed channel will
+// return the same value once the call is done. If ch is nil, a new channel
+// will be allocated. Otherwise, ch has to be buffered or Go will panic.
+//
+// If the flags include FlagNoReplyExpected, ch is ignored and a Call structure
+// is returned with any error in Err and a closed channel in Done containing
+// the returned Call as it's one entry.
+//
+// If the method parameter contains a dot ('.'), the part before the last dot
+// specifies the interface on which the method is called.
+func (o *Object) Go(method string, flags Flags, ch chan *Call, args ...interface{}) *Call {
+	return o.createCall(context.Background(), method, flags, ch, args...)
+}
+
+// GoWithContext acts like Go but takes a context
+func (o *Object) GoWithContext(ctx context.Context, method string, flags Flags, ch chan *Call, args ...interface{}) *Call {
+	return o.createCall(ctx, method, flags, ch, args...)
+}
+
+func (o *Object) createCall(ctx context.Context, method string, flags Flags, ch chan *Call, args ...interface{}) *Call {
+	if ctx == nil {
+		panic("nil context")
+	}
+	iface := ""
+	i := strings.LastIndex(method, ".")
+	if i != -1 {
+		iface = method[:i]
+	}
+	method = method[i+1:]
+	msg := new(Message)
+	msg.Type = TypeMethodCall
+	msg.Flags = flags & (FlagNoAutoStart | FlagNoReplyExpected)
+	msg.Headers = make(map[HeaderField]Variant)
+	msg.Headers[FieldPath] = MakeVariant(o.path)
+	msg.Headers[FieldDestination] = MakeVariant(o.dest)
+	msg.Headers[FieldMember] = MakeVariant(method)
+	if iface != "" {
+		msg.Headers[FieldInterface] = MakeVariant(iface)
+	}
+	msg.Body = args
+	if len(args) > 0 {
+		msg.Headers[FieldSignature] = MakeVariant(SignatureOf(args...))
+	}
+	return o.conn.SendWithContext(ctx, msg, ch)
+}
+
+// GetProperty calls org.freedesktop.DBus.Properties.Get on the given
+// object. The property name must be given in interface.member notation.
+func (o *Object) GetProperty(p string) (Variant, error) {
+	var result Variant
+	err := o.StoreProperty(p, &result)
+	return result, err
+}
+
+// StoreProperty calls org.freedesktop.DBus.Properties.Get on the given
+// object. The property name must be given in interface.member notation.
+// It stores the returned property into the provided value.
+func (o *Object) StoreProperty(p string, value interface{}) error {
+	idx := strings.LastIndex(p, ".")
+	if idx == -1 || idx+1 == len(p) {
+		return errors.New("dbus: invalid property " + p)
+	}
+
+	iface := p[:idx]
+	prop := p[idx+1:]
+
+	return o.Call("org.freedesktop.DBus.Properties.Get", 0, iface, prop).
+		Store(value)
+}
+
+// SetProperty calls org.freedesktop.DBus.Properties.Set on the given
+// object. The property name must be given in interface.member notation.
+func (o *Object) SetProperty(p string, v interface{}) error {
+	idx := strings.LastIndex(p, ".")
+	if idx == -1 || idx+1 == len(p) {
+		return errors.New("dbus: invalid property " + p)
+	}
+
+	iface := p[:idx]
+	prop := p[idx+1:]
+
+	return o.Call("org.freedesktop.DBus.Properties.Set", 0, iface, prop, v).Err
+}
+
+// Destination returns the destination that calls on (o *Object) are sent to.
+func (o *Object) Destination() string {
+	return o.dest
+}
+
+// Path returns the path that calls on (o *Object") are sent to.
+func (o *Object) Path() ObjectPath {
+	return o.path
+}

vendor/github.com/godbus/dbus/v5/sequence.go

+package dbus
+
+// Sequence represents the value of a monotonically increasing counter.
+type Sequence uint64
+
+const (
+	// NoSequence indicates the absence of a sequence value.
+	NoSequence Sequence = 0
+)
+
+// sequenceGenerator represents a monotonically increasing counter.
+type sequenceGenerator struct {
+	nextSequence Sequence
+}
+
+func (generator *sequenceGenerator) next() Sequence {
+	result := generator.nextSequence
+	generator.nextSequence++
+	return result
+}
+
+func newSequenceGenerator() *sequenceGenerator {
+	return &sequenceGenerator{nextSequence: 1}
+}

vendor/github.com/godbus/dbus/v5/sequential_handler.go

+package dbus
+
+import (
+	"sync"
+)
+
+// NewSequentialSignalHandler returns an instance of a new
+// signal handler that guarantees sequential processing of signals. It is a
+// guarantee of this signal handler that signals will be written to
+// channels in the order they are received on the DBus connection.
+func NewSequentialSignalHandler() SignalHandler {
+	return &sequentialSignalHandler{}
+}
+
+type sequentialSignalHandler struct {
+	mu      sync.RWMutex
+	closed  bool
+	signals []*sequentialSignalChannelData
+}
+
+func (sh *sequentialSignalHandler) DeliverSignal(intf, name string, signal *Signal) {
+	sh.mu.RLock()
+	defer sh.mu.RUnlock()
+	if sh.closed {
+		return
+	}
+	for _, scd := range sh.signals {
+		scd.deliver(signal)
+	}
+}
+
+func (sh *sequentialSignalHandler) Terminate() {
+	sh.mu.Lock()
+	defer sh.mu.Unlock()
+	if sh.closed {
+		return
+	}
+
+	for _, scd := range sh.signals {
+		scd.close()
+		close(scd.ch)
+	}
+	sh.closed = true
+	sh.signals = nil
+}
+
+func (sh *sequentialSignalHandler) AddSignal(ch chan<- *Signal) {
+	sh.mu.Lock()
+	defer sh.mu.Unlock()
+	if sh.closed {
+		return
+	}
+	sh.signals = append(sh.signals, newSequentialSignalChannelData(ch))
+}
+
+func (sh *sequentialSignalHandler) RemoveSignal(ch chan<- *Signal) {
+	sh.mu.Lock()
+	defer sh.mu.Unlock()
+	if sh.closed {
+		return
+	}
+	for i := len(sh.signals) - 1; i >= 0; i-- {
+		if ch == sh.signals[i].ch {
+			sh.signals[i].close()
+			copy(sh.signals[i:], sh.signals[i+1:])
+			sh.signals[len(sh.signals)-1] = nil
+			sh.signals = sh.signals[:len(sh.signals)-1]
+		}
+	}
+}
+
+type sequentialSignalChannelData struct {
+	ch   chan<- *Signal
+	in   chan *Signal
+	done chan struct{}
+}
+
+func newSequentialSignalChannelData(ch chan<- *Signal) *sequentialSignalChannelData {
+	scd := &sequentialSignalChannelData{
+		ch:   ch,
+		in:   make(chan *Signal),
+		done: make(chan struct{}),
+	}
+	go scd.bufferSignals()
+	return scd
+}
+
+func (scd *sequentialSignalChannelData) bufferSignals() {
+	defer close(scd.done)
+
+	// Ensure that signals are delivered to scd.ch in the same
+	// order they are received from scd.in.
+	var queue []*Signal
+	for {
+		if len(queue) == 0 {
+			signal, ok := <- scd.in
+			if !ok {
+				return
+			}
+			queue = append(queue, signal)
+		}
+		select {
+		case scd.ch <- queue[0]:
+			copy(queue, queue[1:])
+			queue[len(queue)-1] = nil
+			queue = queue[:len(queue)-1]
+		case signal, ok := <-scd.in:
+			if !ok {
+				return
+			}
+			queue = append(queue, signal)
+		}
+	}
+}
+
+func (scd *sequentialSignalChannelData) deliver(signal *Signal) {
+	scd.in <- signal
+}
+
+func (scd *sequentialSignalChannelData) close() {
+	close(scd.in)
+	// Ensure that bufferSignals() has exited and won't attempt
+	// any future sends on scd.ch
+	<-scd.done
+}

vendor/github.com/godbus/dbus/v5/server_interfaces.go

+package dbus
+
+// Terminator allows a handler to implement a shutdown mechanism that
+// is called when the connection terminates.
+type Terminator interface {
+	Terminate()
+}
+
+// Handler is the representation of a D-Bus Application.
+//
+// The Handler must have a way to lookup objects given
+// an ObjectPath. The returned object must implement the
+// ServerObject interface.
+type Handler interface {
+	LookupObject(path ObjectPath) (ServerObject, bool)
+}
+
+// ServerObject is the representation of an D-Bus Object.
+//
+// Objects are registered at a path for a given Handler.
+// The Objects implement D-Bus interfaces. The semantics
+// of Interface lookup is up to the implementation of
+// the ServerObject. The ServerObject implementation may
+// choose to implement empty string as a valid interface
+// represeting all methods or not per the D-Bus specification.
+type ServerObject interface {
+	LookupInterface(name string) (Interface, bool)
+}
+
+// An Interface is the representation of a D-Bus Interface.
+//
+// Interfaces are a grouping of methods implemented by the Objects.
+// Interfaces are responsible for routing method calls.
+type Interface interface {
+	LookupMethod(name string) (Method, bool)
+}
+
+// A Method represents the exposed methods on D-Bus.
+type Method interface {
+	// Call requires that all arguments are decoded before being passed to it.
+	Call(args ...interface{}) ([]interface{}, error)
+	NumArguments() int
+	NumReturns() int
+	// ArgumentValue returns a representative value for the argument at position
+	// it should be of the proper type. reflect.Zero would be a good mechanism
+	// to use for this Value.
+	ArgumentValue(position int) interface{}
+	// ReturnValue returns a representative value for the return at position
+	// it should be of the proper type. reflect.Zero would be a good mechanism
+	// to use for this Value.
+	ReturnValue(position int) interface{}
+}
+
+// An Argument Decoder can decode arguments using the non-standard mechanism
+//
+// If a method implements this interface then the non-standard
+// decoder will be used.
+//
+// Method arguments must be decoded from the message.
+// The mechanism for doing this will vary based on the
+// implementation of the method. A normal approach is provided
+// as part of this library, but may be replaced with
+// any other decoding scheme.
+type ArgumentDecoder interface {
+	// To decode the arguments of a method the sender and message are
+	// provided in case the semantics of the implementer provides access
+	// to these as part of the method invocation.
+	DecodeArguments(conn *Conn, sender string, msg *Message, args []interface{}) ([]interface{}, error)
+}
+
+// A SignalHandler is responsible for delivering a signal.
+//
+// Signal delivery may be changed from the default channel
+// based approach by Handlers implementing the SignalHandler
+// interface.
+type SignalHandler interface {
+	DeliverSignal(iface, name string, signal *Signal)
+}
+
+// SignalRegistrar manages signal delivery channels.
+//
+// This is an optional set of methods for `SignalHandler`.
+type SignalRegistrar interface {
+	AddSignal(ch chan<- *Signal)
+	RemoveSignal(ch chan<- *Signal)
+}
+
+// A DBusError is used to convert a generic object to a D-Bus error.
+//
+// Any custom error mechanism may implement this interface to provide
+// a custom encoding of the error on D-Bus. By default if a normal
+// error is returned, it will be encoded as the generic
+// "org.freedesktop.DBus.Error.Failed" error. By implementing this
+// interface as well a custom encoding may be provided.
+type DBusError interface {
+	DBusError() (string, []interface{})
+}
+
+// SerialGenerator is responsible for serials generation.
+//
+// Different approaches for the serial generation can be used,
+// maintaining a map guarded with a mutex (the standard way) or
+// simply increment an atomic counter.
+type SerialGenerator interface {
+	GetSerial() uint32
+	RetireSerial(serial uint32)
+}

vendor/github.com/godbus/dbus/v5/sig.go

+package dbus
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+var sigToType = map[byte]reflect.Type{
+	'y': byteType,
+	'b': boolType,
+	'n': int16Type,
+	'q': uint16Type,
+	'i': int32Type,
+	'u': uint32Type,
+	'x': int64Type,
+	't': uint64Type,
+	'd': float64Type,
+	's': stringType,
+	'g': signatureType,
+	'o': objectPathType,
+	'v': variantType,
+	'h': unixFDIndexType,
+}
+
+// Signature represents a correct type signature as specified by the D-Bus
+// specification. The zero value represents the empty signature, "".
+type Signature struct {
+	str string
+}
+
+// SignatureOf returns the concatenation of all the signatures of the given
+// values. It panics if one of them is not representable in D-Bus.
+func SignatureOf(vs ...interface{}) Signature {
+	var s string
+	for _, v := range vs {
+		s += getSignature(reflect.TypeOf(v), &depthCounter{})
+	}
+	return Signature{s}
+}
+
+// SignatureOfType returns the signature of the given type. It panics if the
+// type is not representable in D-Bus.
+func SignatureOfType(t reflect.Type) Signature {
+	return Signature{getSignature(t, &depthCounter{})}
+}
+
+// getSignature returns the signature of the given type and panics on unknown types.
+func getSignature(t reflect.Type, depth *depthCounter) (sig string) {
+	if !depth.Valid() {
+		panic("container nesting too deep")
+	}
+	defer func() {
+		if len(sig) > 255 {
+			panic("signature exceeds the length limitation")
+		}
+	}()
+	// handle simple types first
+	switch t.Kind() {
+	case reflect.Uint8:
+		return "y"
+	case reflect.Bool:
+		return "b"
+	case reflect.Int16:
+		return "n"
+	case reflect.Uint16:
+		return "q"
+	case reflect.Int, reflect.Int32:
+		if t == unixFDType {
+			return "h"
+		}
+		return "i"
+	case reflect.Uint, reflect.Uint32:
+		if t == unixFDIndexType {
+			return "h"
+		}
+		return "u"
+	case reflect.Int64:
+		return "x"
+	case reflect.Uint64:
+		return "t"
+	case reflect.Float64:
+		return "d"
+	case reflect.Ptr:
+		return getSignature(t.Elem(), depth)
+	case reflect.String:
+		if t == objectPathType {
+			return "o"
+		}
+		return "s"
+	case reflect.Struct:
+		if t == variantType {
+			return "v"
+		} else if t == signatureType {
+			return "g"
+		}
+		var s string
+		for i := 0; i < t.NumField(); i++ {
+			field := t.Field(i)
+			if field.PkgPath == "" && field.Tag.Get("dbus") != "-" {
+				s += getSignature(t.Field(i).Type, depth.EnterStruct())
+			}
+		}
+		if len(s) == 0 {
+			panic(InvalidTypeError{t})
+		}
+		return "(" + s + ")"
+	case reflect.Array, reflect.Slice:
+		return "a" + getSignature(t.Elem(), depth.EnterArray())
+	case reflect.Map:
+		if !isKeyType(t.Key()) {
+			panic(InvalidTypeError{t})
+		}
+		return "a{" + getSignature(t.Key(), depth.EnterArray().EnterDictEntry()) + getSignature(t.Elem(), depth.EnterArray().EnterDictEntry()) + "}"
+	case reflect.Interface:
+		return "v"
+	}
+	panic(InvalidTypeError{t})
+}
+
+// ParseSignature returns the signature represented by this string, or a
+// SignatureError if the string is not a valid signature.
+func ParseSignature(s string) (sig Signature, err error) {
+	if len(s) == 0 {
+		return
+	}
+	if len(s) > 255 {
+		return Signature{""}, SignatureError{s, "too long"}
+	}
+	sig.str = s
+	for err == nil && len(s) != 0 {
+		err, s = validSingle(s, &depthCounter{})
+	}
+	if err != nil {
+		sig = Signature{""}
+	}
+
+	return
+}
+
+// ParseSignatureMust behaves like ParseSignature, except that it panics if s
+// is not valid.
+func ParseSignatureMust(s string) Signature {
+	sig, err := ParseSignature(s)
+	if err != nil {
+		panic(err)
+	}
+	return sig
+}
+
+// Empty returns whether the signature is the empty signature.
+func (s Signature) Empty() bool {
+	return s.str == ""
+}
+
+// Single returns whether the signature represents a single, complete type.
+func (s Signature) Single() bool {
+	err, r := validSingle(s.str, &depthCounter{})
+	return err != nil && r == ""
+}
+
+// String returns the signature's string representation.
+func (s Signature) String() string {
+	return s.str
+}
+
+// A SignatureError indicates that a signature passed to a function or received
+// on a connection is not a valid signature.
+type SignatureError struct {
+	Sig    string
+	Reason string
+}
+
+func (e SignatureError) Error() string {
+	return fmt.Sprintf("dbus: invalid signature: %q (%s)", e.Sig, e.Reason)
+}
+
+type depthCounter struct {
+	arrayDepth, structDepth, dictEntryDepth int
+}
+
+func (cnt *depthCounter) Valid() bool {
+	return cnt.arrayDepth <= 32 && cnt.structDepth <= 32 && cnt.dictEntryDepth <= 32
+}
+
+func (cnt depthCounter) EnterArray() *depthCounter {
+	cnt.arrayDepth++
+	return &cnt
+}
+
+func (cnt depthCounter) EnterStruct() *depthCounter {
+	cnt.structDepth++
+	return &cnt
+}
+
+func (cnt depthCounter) EnterDictEntry() *depthCounter {
+	cnt.dictEntryDepth++
+	return &cnt
+}
+
+// Try to read a single type from this string. If it was successful, err is nil
+// and rem is the remaining unparsed part. Otherwise, err is a non-nil
+// SignatureError and rem is "". depth is the current recursion depth which may
+// not be greater than 64 and should be given as 0 on the first call.
+func validSingle(s string, depth *depthCounter) (err error, rem string) {
+	if s == "" {
+		return SignatureError{Sig: s, Reason: "empty signature"}, ""
+	}
+	if !depth.Valid() {
+		return SignatureError{Sig: s, Reason: "container nesting too deep"}, ""
+	}
+	switch s[0] {
+	case 'y', 'b', 'n', 'q', 'i', 'u', 'x', 't', 'd', 's', 'g', 'o', 'v', 'h':
+		return nil, s[1:]
+	case 'a':
+		if len(s) > 1 && s[1] == '{' {
+			i := findMatching(s[1:], '{', '}')
+			if i == -1 {
+				return SignatureError{Sig: s, Reason: "unmatched '{'"}, ""
+			}
+			i++
+			rem = s[i+1:]
+			s = s[2:i]
+			if err, _ = validSingle(s[:1], depth.EnterArray().EnterDictEntry()); err != nil {
+				return err, ""
+			}
+			err, nr := validSingle(s[1:], depth.EnterArray().EnterDictEntry())
+			if err != nil {
+				return err, ""
+			}
+			if nr != "" {
+				return SignatureError{Sig: s, Reason: "too many types in dict"}, ""
+			}
+			return nil, rem
+		}
+		return validSingle(s[1:], depth.EnterArray())
+	case '(':
+		i := findMatching(s, '(', ')')
+		if i == -1 {
+			return SignatureError{Sig: s, Reason: "unmatched ')'"}, ""
+		}
+		rem = s[i+1:]
+		s = s[1:i]
+		for err == nil && s != "" {
+			err, s = validSingle(s, depth.EnterStruct())
+		}
+		if err != nil {
+			rem = ""
+		}
+		return
+	}
+	return SignatureError{Sig: s, Reason: "invalid type character"}, ""
+}
+
+func findMatching(s string, left, right rune) int {
+	n := 0
+	for i, v := range s {
+		if v == left {
+			n++
+		} else if v == right {
+			n--
+		}
+		if n == 0 {
+			return i
+		}
+	}
+	return -1
+}
+
+// typeFor returns the type of the given signature. It ignores any left over
+// characters and panics if s doesn't start with a valid type signature.
+func typeFor(s string) (t reflect.Type) {
+	err, _ := validSingle(s, &depthCounter{})
+	if err != nil {
+		panic(err)
+	}
+
+	if t, ok := sigToType[s[0]]; ok {
+		return t
+	}
+	switch s[0] {
+	case 'a':
+		if s[1] == '{' {
+			i := strings.LastIndex(s, "}")
+			t = reflect.MapOf(sigToType[s[2]], typeFor(s[3:i]))
+		} else {
+			t = reflect.SliceOf(typeFor(s[1:]))
+		}
+	case '(':
+		t = interfacesType
+	}
+	return
+}

vendor/github.com/godbus/dbus/v5/transport_darwin.go

+package dbus
+
+func (t *unixTransport) SendNullByte() error {
+	_, err := t.Write([]byte{0})
+	return err
+}

vendor/github.com/godbus/dbus/v5/transport_generic.go

+package dbus
+
+import (
+	"encoding/binary"
+	"errors"
+	"io"
+	"unsafe"
+)
+
+var nativeEndian binary.ByteOrder
+
+func detectEndianness() binary.ByteOrder {
+	var x uint32 = 0x01020304
+	if *(*byte)(unsafe.Pointer(&x)) == 0x01 {
+		return binary.BigEndian
+	}
+	return binary.LittleEndian
+}
+
+func init() {
+	nativeEndian = detectEndianness()
+}
+
+type genericTransport struct {
+	io.ReadWriteCloser
+}
+
+func (t genericTransport) SendNullByte() error {
+	_, err := t.Write([]byte{0})
+	return err
+}
+
+func (t genericTransport) SupportsUnixFDs() bool {
+	return false
+}
+
+func (t genericTransport) EnableUnixFDs() {}
+
+func (t genericTransport) ReadMessage() (*Message, error) {
+	return DecodeMessage(t)
+}
+
+func (t genericTransport) SendMessage(msg *Message) error {
+	fds, err := msg.CountFds()
+	if err != nil {
+		return err
+	}
+	if fds != 0 {
+		return errors.New("dbus: unix fd passing not enabled")
+	}
+	return msg.EncodeTo(t, nativeEndian)
+}

vendor/github.com/godbus/dbus/v5/transport_nonce_tcp.go

+//+build !windows
+
+package dbus
+
+import (
+	"errors"
+	"io/ioutil"
+	"net"
+)
+
+func init() {
+	transports["nonce-tcp"] = newNonceTcpTransport
+}
+
+func newNonceTcpTransport(keys string) (transport, error) {
+	host := getKey(keys, "host")
+	port := getKey(keys, "port")
+	noncefile := getKey(keys, "noncefile")
+	if host == "" || port == "" || noncefile == "" {
+		return nil, errors.New("dbus: unsupported address (must set host, port and noncefile)")
+	}
+	protocol, err := tcpFamily(keys)
+	if err != nil {
+		return nil, err
+	}
+	socket, err := net.Dial(protocol, net.JoinHostPort(host, port))
+	if err != nil {
+		return nil, err
+	}
+	b, err := ioutil.ReadFile(noncefile)
+	if err != nil {
+		return nil, err
+	}
+	_, err = socket.Write(b)
+	if err != nil {
+		return nil, err
+	}
+	return NewConn(socket)
+}

vendor/github.com/godbus/dbus/v5/transport_tcp.go

+package dbus
+
+import (
+	"errors"
+	"net"
+)
+
+func init() {
+	transports["tcp"] = newTcpTransport
+}
+
+func tcpFamily(keys string) (string, error) {
+	switch getKey(keys, "family") {
+	case "":
+		return "tcp", nil
+	case "ipv4":
+		return "tcp4", nil
+	case "ipv6":
+		return "tcp6", nil
+	default:
+		return "", errors.New("dbus: invalid tcp family (must be ipv4 or ipv6)")
+	}
+}
+
+func newTcpTransport(keys string) (transport, error) {
+	host := getKey(keys, "host")
+	port := getKey(keys, "port")
+	if host == "" || port == "" {
+		return nil, errors.New("dbus: unsupported address (must set host and port)")
+	}
+
+	protocol, err := tcpFamily(keys)
+	if err != nil {
+		return nil, err
+	}
+	socket, err := net.Dial(protocol, net.JoinHostPort(host, port))
+	if err != nil {
+		return nil, err
+	}
+	return NewConn(socket)
+}

vendor/github.com/godbus/dbus/v5/transport_unix.go

+//+build !windows,!solaris
+
+package dbus
+
+import (
+	"bytes"
+	"encoding/binary"
+	"errors"
+	"io"
+	"net"
+	"syscall"
+)
+
+type oobReader struct {
+	conn *net.UnixConn
+	oob  []byte
+	buf  [4096]byte
+}
+
+func (o *oobReader) Read(b []byte) (n int, err error) {
+	n, oobn, flags, _, err := o.conn.ReadMsgUnix(b, o.buf[:])
+	if err != nil {
+		return n, err
+	}
+	if flags&syscall.MSG_CTRUNC != 0 {
+		return n, errors.New("dbus: control data truncated (too many fds received)")
+	}
+	o.oob = append(o.oob, o.buf[:oobn]...)
+	return n, nil
+}
+
+type unixTransport struct {
+	*net.UnixConn
+	rdr        *oobReader
+	hasUnixFDs bool
+}
+
+func newUnixTransport(keys string) (transport, error) {
+	var err error
+
+	t := new(unixTransport)
+	abstract := getKey(keys, "abstract")
+	path := getKey(keys, "path")
+	switch {
+	case abstract == "" && path == "":
+		return nil, errors.New("dbus: invalid address (neither path nor abstract set)")
+	case abstract != "" && path == "":
+		t.UnixConn, err = net.DialUnix("unix", nil, &net.UnixAddr{Name: "@" + abstract, Net: "unix"})
+		if err != nil {
+			return nil, err
+		}
+		return t, nil
+	case abstract == "" && path != "":
+		t.UnixConn, err = net.DialUnix("unix", nil, &net.UnixAddr{Name: path, Net: "unix"})
+		if err != nil {
+			return nil, err
+		}
+		return t, nil
+	default:
+		return nil, errors.New("dbus: invalid address (both path and abstract set)")
+	}
+}
+
+func init() {
+	transports["unix"] = newUnixTransport
+}
+
+func (t *unixTransport) EnableUnixFDs() {
+	t.hasUnixFDs = true
+}
+
+func (t *unixTransport) ReadMessage() (*Message, error) {
+	var (
+		blen, hlen uint32
+		csheader   [16]byte
+		headers    []header
+		order      binary.ByteOrder
+		unixfds    uint32
+	)
+	// To be sure that all bytes of out-of-band data are read, we use a special
+	// reader that uses ReadUnix on the underlying connection instead of Read
+	// and gathers the out-of-band data in a buffer.
+	if t.rdr == nil {
+		t.rdr = &oobReader{conn: t.UnixConn}
+	} else {
+		t.rdr.oob = nil
+	}
+
+	// read the first 16 bytes (the part of the header that has a constant size),
+	// from which we can figure out the length of the rest of the message
+	if _, err := io.ReadFull(t.rdr, csheader[:]); err != nil {
+		return nil, err
+	}
+	switch csheader[0] {
+	case 'l':
+		order = binary.LittleEndian
+	case 'B':
+		order = binary.BigEndian
+	default:
+		return nil, InvalidMessageError("invalid byte order")
+	}
+	// csheader[4:8] -> length of message body, csheader[12:16] -> length of
+	// header fields (without alignment)
+	binary.Read(bytes.NewBuffer(csheader[4:8]), order, &blen)
+	binary.Read(bytes.NewBuffer(csheader[12:]), order, &hlen)
+	if hlen%8 != 0 {
+		hlen += 8 - (hlen % 8)
+	}
+
+	// decode headers and look for unix fds
+	headerdata := make([]byte, hlen+4)
+	copy(headerdata, csheader[12:])
+	if _, err := io.ReadFull(t.rdr, headerdata[4:]); err != nil {
+		return nil, err
+	}
+	dec := newDecoder(bytes.NewBuffer(headerdata), order, make([]int, 0))
+	dec.pos = 12
+	vs, err := dec.Decode(Signature{"a(yv)"})
+	if err != nil {
+		return nil, err
+	}
+	Store(vs, &headers)
+	for _, v := range headers {
+		if v.Field == byte(FieldUnixFDs) {
+			unixfds, _ = v.Variant.value.(uint32)
+		}
+	}
+	all := make([]byte, 16+hlen+blen)
+	copy(all, csheader[:])
+	copy(all[16:], headerdata[4:])
+	if _, err := io.ReadFull(t.rdr, all[16+hlen:]); err != nil {
+		return nil, err
+	}
+	if unixfds != 0 {
+		if !t.hasUnixFDs {
+			return nil, errors.New("dbus: got unix fds on unsupported transport")
+		}
+		// read the fds from the OOB data
+		scms, err := syscall.ParseSocketControlMessage(t.rdr.oob)
+		if err != nil {
+			return nil, err
+		}
+		if len(scms) != 1 {
+			return nil, errors.New("dbus: received more than one socket control message")
+		}
+		fds, err := syscall.ParseUnixRights(&scms[0])
+		if err != nil {
+			return nil, err
+		}
+		msg, err := DecodeMessageWithFDs(bytes.NewBuffer(all), fds)
+		if err != nil {
+			return nil, err
+		}
+		// substitute the values in the message body (which are indices for the
+		// array receiver via OOB) with the actual values
+		for i, v := range msg.Body {
+			switch index := v.(type) {
+			case UnixFDIndex:
+				if uint32(index) >= unixfds {
+					return nil, InvalidMessageError("invalid index for unix fd")
+				}
+				msg.Body[i] = UnixFD(fds[index])
+			case []UnixFDIndex:
+				fdArray := make([]UnixFD, len(index))
+				for k, j := range index {
+					if uint32(j) >= unixfds {
+						return nil, InvalidMessageError("invalid index for unix fd")
+					}
+					fdArray[k] = UnixFD(fds[j])
+				}
+				msg.Body[i] = fdArray
+			}
+		}
+		return msg, nil
+	}
+	return DecodeMessage(bytes.NewBuffer(all))
+}
+
+func (t *unixTransport) SendMessage(msg *Message) error {
+	fdcnt, err := msg.CountFds()
+	if err != nil {
+		return err
+	}
+	if fdcnt != 0 {
+		if !t.hasUnixFDs {
+			return errors.New("dbus: unix fd passing not enabled")
+		}
+		msg.Headers[FieldUnixFDs] = MakeVariant(uint32(fdcnt))
+		buf := new(bytes.Buffer)
+		fds, err := msg.EncodeToWithFDs(buf, nativeEndian)
+		if err != nil {
+			return err
+		}
+		oob := syscall.UnixRights(fds...)
+		n, oobn, err := t.UnixConn.WriteMsgUnix(buf.Bytes(), oob, nil)
+		if err != nil {
+			return err
+		}
+		if n != buf.Len() || oobn != len(oob) {
+			return io.ErrShortWrite
+		}
+	} else {
+		if err := msg.EncodeTo(t, nativeEndian); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (t *unixTransport) SupportsUnixFDs() bool {
+	return true
+}

vendor/github.com/godbus/dbus/v5/transport_unixcred_dragonfly.go

+// The UnixCredentials system call is currently only implemented on Linux
+// http://golang.org/src/pkg/syscall/sockcmsg_linux.go
+// https://golang.org/s/go1.4-syscall
+// http://code.google.com/p/go/source/browse/unix/sockcmsg_linux.go?repo=sys
+
+// Local implementation of the UnixCredentials system call for DragonFly BSD
+
+package dbus
+
+/*
+#include <sys/ucred.h>
+*/
+import "C"
+
+import (
+	"io"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+// http://golang.org/src/pkg/syscall/ztypes_linux_amd64.go
+// http://golang.org/src/pkg/syscall/ztypes_dragonfly_amd64.go
+type Ucred struct {
+	Pid int32
+	Uid uint32
+	Gid uint32
+}
+
+// http://golang.org/src/pkg/syscall/types_linux.go
+// http://golang.org/src/pkg/syscall/types_dragonfly.go
+// https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/ucred.h
+const (
+	SizeofUcred = C.sizeof_struct_ucred
+)
+
+// http://golang.org/src/pkg/syscall/sockcmsg_unix.go
+func cmsgAlignOf(salen int) int {
+	// From http://golang.org/src/pkg/syscall/sockcmsg_unix.go
+	//salign := sizeofPtr
+	// NOTE: It seems like 64-bit Darwin and DragonFly BSD kernels
+	// still require 32-bit aligned access to network subsystem.
+	//if darwin64Bit || dragonfly64Bit {
+	//	salign = 4
+	//}
+	salign := 4
+	return (salen + salign - 1) & ^(salign - 1)
+}
+
+// http://golang.org/src/pkg/syscall/sockcmsg_unix.go
+func cmsgData(h *syscall.Cmsghdr) unsafe.Pointer {
+	return unsafe.Pointer(uintptr(unsafe.Pointer(h)) + uintptr(cmsgAlignOf(syscall.SizeofCmsghdr)))
+}
+
+// http://golang.org/src/pkg/syscall/sockcmsg_linux.go
+// UnixCredentials encodes credentials into a socket control message
+// for sending to another process. This can be used for
+// authentication.
+func UnixCredentials(ucred *Ucred) []byte {
+	b := make([]byte, syscall.CmsgSpace(SizeofUcred))
+	h := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
+	h.Level = syscall.SOL_SOCKET
+	h.Type = syscall.SCM_CREDS
+	h.SetLen(syscall.CmsgLen(SizeofUcred))
+	*((*Ucred)(cmsgData(h))) = *ucred
+	return b
+}
+
+// http://golang.org/src/pkg/syscall/sockcmsg_linux.go
+// ParseUnixCredentials decodes a socket control message that contains
+// credentials in a Ucred structure. To receive such a message, the
+// SO_PASSCRED option must be enabled on the socket.
+func ParseUnixCredentials(m *syscall.SocketControlMessage) (*Ucred, error) {
+	if m.Header.Level != syscall.SOL_SOCKET {
+		return nil, syscall.EINVAL
+	}
+	if m.Header.Type != syscall.SCM_CREDS {
+		return nil, syscall.EINVAL
+	}
+	ucred := *(*Ucred)(unsafe.Pointer(&m.Data[0]))
+	return &ucred, nil
+}
+
+func (t *unixTransport) SendNullByte() error {
+	ucred := &Ucred{Pid: int32(os.Getpid()), Uid: uint32(os.Getuid()), Gid: uint32(os.Getgid())}
+	b := UnixCredentials(ucred)
+	_, oobn, err := t.UnixConn.WriteMsgUnix([]byte{0}, b, nil)
+	if err != nil {
+		return err
+	}
+	if oobn != len(b) {
+		return io.ErrShortWrite
+	}
+	return nil
+}

vendor/github.com/godbus/dbus/v5/transport_unixcred_freebsd.go

+// The UnixCredentials system call is currently only implemented on Linux
+// http://golang.org/src/pkg/syscall/sockcmsg_linux.go
+// https://golang.org/s/go1.4-syscall
+// http://code.google.com/p/go/source/browse/unix/sockcmsg_linux.go?repo=sys
+
+// Local implementation of the UnixCredentials system call for FreeBSD
+
+package dbus
+
+/*
+const int sizeofPtr = sizeof(void*);
+#define _WANT_UCRED
+#include <sys/types.h>
+#include <sys/ucred.h>
+*/
+import "C"
+
+import (
+	"io"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+// http://golang.org/src/pkg/syscall/ztypes_linux_amd64.go
+// https://golang.org/src/syscall/ztypes_freebsd_amd64.go
+type Ucred struct {
+	Pid int32
+	Uid uint32
+	Gid uint32
+}
+
+// http://golang.org/src/pkg/syscall/types_linux.go
+// https://golang.org/src/syscall/types_freebsd.go
+// https://github.com/freebsd/freebsd/blob/master/sys/sys/ucred.h
+const (
+	SizeofUcred = C.sizeof_struct_ucred
+)
+
+// http://golang.org/src/pkg/syscall/sockcmsg_unix.go
+func cmsgAlignOf(salen int) int {
+	salign := C.sizeofPtr
+
+	return (salen + salign - 1) & ^(salign - 1)
+}
+
+// http://golang.org/src/pkg/syscall/sockcmsg_unix.go
+func cmsgData(h *syscall.Cmsghdr) unsafe.Pointer {
+	return unsafe.Pointer(uintptr(unsafe.Pointer(h)) + uintptr(cmsgAlignOf(syscall.SizeofCmsghdr)))
+}
+
+// http://golang.org/src/pkg/syscall/sockcmsg_linux.go
+// UnixCredentials encodes credentials into a socket control message
+// for sending to another process. This can be used for
+// authentication.
+func UnixCredentials(ucred *Ucred) []byte {
+	b := make([]byte, syscall.CmsgSpace(SizeofUcred))
+	h := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
+	h.Level = syscall.SOL_SOCKET
+	h.Type = syscall.SCM_CREDS
+	h.SetLen(syscall.CmsgLen(SizeofUcred))
+	*((*Ucred)(cmsgData(h))) = *ucred
+	return b
+}
+
+// http://golang.org/src/pkg/syscall/sockcmsg_linux.go
+// ParseUnixCredentials decodes a socket control message that contains
+// credentials in a Ucred structure. To receive such a message, the
+// SO_PASSCRED option must be enabled on the socket.
+func ParseUnixCredentials(m *syscall.SocketControlMessage) (*Ucred, error) {
+	if m.Header.Level != syscall.SOL_SOCKET {
+		return nil, syscall.EINVAL
+	}
+	if m.Header.Type != syscall.SCM_CREDS {
+		return nil, syscall.EINVAL
+	}
+	ucred := *(*Ucred)(unsafe.Pointer(&m.Data[0]))
+	return &ucred, nil
+}
+
+func (t *unixTransport) SendNullByte() error {
+	ucred := &Ucred{Pid: int32(os.Getpid()), Uid: uint32(os.Getuid()), Gid: uint32(os.Getgid())}
+	b := UnixCredentials(ucred)
+	_, oobn, err := t.UnixConn.WriteMsgUnix([]byte{0}, b, nil)
+	if err != nil {
+		return err
+	}
+	if oobn != len(b) {
+		return io.ErrShortWrite
+	}
+	return nil
+}

vendor/github.com/godbus/dbus/v5/transport_unixcred_linux.go

+// The UnixCredentials system call is currently only implemented on Linux
+// http://golang.org/src/pkg/syscall/sockcmsg_linux.go
+// https://golang.org/s/go1.4-syscall
+// http://code.google.com/p/go/source/browse/unix/sockcmsg_linux.go?repo=sys
+
+package dbus
+
+import (
+	"io"
+	"os"
+	"syscall"
+)
+
+func (t *unixTransport) SendNullByte() error {
+	ucred := &syscall.Ucred{Pid: int32(os.Getpid()), Uid: uint32(os.Getuid()), Gid: uint32(os.Getgid())}
+	b := syscall.UnixCredentials(ucred)
+	_, oobn, err := t.UnixConn.WriteMsgUnix([]byte{0}, b, nil)
+	if err != nil {
+		return err
+	}
+	if oobn != len(b) {
+		return io.ErrShortWrite
+	}
+	return nil
+}

vendor/github.com/godbus/dbus/v5/transport_unixcred_netbsd.go

+package dbus
+
+import "io"
+
+func (t *unixTransport) SendNullByte() error {
+	n, _, err := t.UnixConn.WriteMsgUnix([]byte{0}, nil, nil)
+	if err != nil {
+		return err
+	}
+	if n != 1 {
+		return io.ErrShortWrite
+	}
+	return nil
+}

vendor/github.com/godbus/dbus/v5/transport_unixcred_openbsd.go

+package dbus
+
+import "io"
+
+func (t *unixTransport) SendNullByte() error {
+	n, _, err := t.UnixConn.WriteMsgUnix([]byte{0}, nil, nil)
+	if err != nil {
+		return err
+	}
+	if n != 1 {
+		return io.ErrShortWrite
+	}
+	return nil
+}

vendor/github.com/godbus/dbus/v5/transport_zos.go

+package dbus
+
+func (t *unixTransport) SendNullByte() error {
+	_, err := t.Write([]byte{0})
+	return err
+}

vendor/github.com/godbus/dbus/v5/variant.go

+package dbus
+
+import (
+	"bytes"
+	"fmt"
+	"reflect"
+	"sort"
+	"strconv"
+)
+
+// Variant represents the D-Bus variant type.
+type Variant struct {
+	sig   Signature
+	value interface{}
+}
+
+// MakeVariant converts the given value to a Variant. It panics if v cannot be
+// represented as a D-Bus type.
+func MakeVariant(v interface{}) Variant {
+	return MakeVariantWithSignature(v, SignatureOf(v))
+}
+
+// MakeVariantWithSignature converts the given value to a Variant.
+func MakeVariantWithSignature(v interface{}, s Signature) Variant {
+	return Variant{s, v}
+}
+
+// ParseVariant parses the given string as a variant as described at
+// https://developer.gnome.org/glib/stable/gvariant-text.html. If sig is not
+// empty, it is taken to be the expected signature for the variant.
+func ParseVariant(s string, sig Signature) (Variant, error) {
+	tokens := varLex(s)
+	p := &varParser{tokens: tokens}
+	n, err := varMakeNode(p)
+	if err != nil {
+		return Variant{}, err
+	}
+	if sig.str == "" {
+		sig, err = varInfer(n)
+		if err != nil {
+			return Variant{}, err
+		}
+	}
+	v, err := n.Value(sig)
+	if err != nil {
+		return Variant{}, err
+	}
+	return MakeVariant(v), nil
+}
+
+// format returns a formatted version of v and whether this string can be parsed
+// unambiguously.
+func (v Variant) format() (string, bool) {
+	switch v.sig.str[0] {
+	case 'b', 'i':
+		return fmt.Sprint(v.value), true
+	case 'n', 'q', 'u', 'x', 't', 'd', 'h':
+		return fmt.Sprint(v.value), false
+	case 's':
+		return strconv.Quote(v.value.(string)), true
+	case 'o':
+		return strconv.Quote(string(v.value.(ObjectPath))), false
+	case 'g':
+		return strconv.Quote(v.value.(Signature).str), false
+	case 'v':
+		s, unamb := v.value.(Variant).format()
+		if !unamb {
+			return "<@" + v.value.(Variant).sig.str + " " + s + ">", true
+		}
+		return "<" + s + ">", true
+	case 'y':
+		return fmt.Sprintf("%#x", v.value.(byte)), false
+	}
+	rv := reflect.ValueOf(v.value)
+	switch rv.Kind() {
+	case reflect.Slice:
+		if rv.Len() == 0 {
+			return "[]", false
+		}
+		unamb := true
+		buf := bytes.NewBuffer([]byte("["))
+		for i := 0; i < rv.Len(); i++ {
+			// TODO: slooow
+			s, b := MakeVariant(rv.Index(i).Interface()).format()
+			unamb = unamb && b
+			buf.WriteString(s)
+			if i != rv.Len()-1 {
+				buf.WriteString(", ")
+			}
+		}
+		buf.WriteByte(']')
+		return buf.String(), unamb
+	case reflect.Map:
+		if rv.Len() == 0 {
+			return "{}", false
+		}
+		unamb := true
+		var buf bytes.Buffer
+		kvs := make([]string, rv.Len())
+		for i, k := range rv.MapKeys() {
+			s, b := MakeVariant(k.Interface()).format()
+			unamb = unamb && b
+			buf.Reset()
+			buf.WriteString(s)
+			buf.WriteString(": ")
+			s, b = MakeVariant(rv.MapIndex(k).Interface()).format()
+			unamb = unamb && b
+			buf.WriteString(s)
+			kvs[i] = buf.String()
+		}
+		buf.Reset()
+		buf.WriteByte('{')
+		sort.Strings(kvs)
+		for i, kv := range kvs {
+			if i > 0 {
+				buf.WriteString(", ")
+			}
+			buf.WriteString(kv)
+		}
+		buf.WriteByte('}')
+		return buf.String(), unamb
+	}
+	return `"INVALID"`, true
+}
+
+// Signature returns the D-Bus signature of the underlying value of v.
+func (v Variant) Signature() Signature {
+	return v.sig
+}
+
+// String returns the string representation of the underlying value of v as
+// described at https://developer.gnome.org/glib/stable/gvariant-text.html.
+func (v Variant) String() string {
+	s, unamb := v.format()
+	if !unamb {
+		return "@" + v.sig.str + " " + s
+	}
+	return s
+}
+
+// Value returns the underlying value of v.
+func (v Variant) Value() interface{} {
+	return v.value
+}
+
+// Store converts the variant into a native go type using the same
+// mechanism as the "Store" function.
+func (v Variant) Store(value interface{}) error {
+	return storeInterfaces(v.value, value)
+}

vendor/github.com/godbus/dbus/v5/variant_lexer.go

+package dbus
+
+import (
+	"fmt"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+// Heavily inspired by the lexer from text/template.
+
+type varToken struct {
+	typ varTokenType
+	val string
+}
+
+type varTokenType byte
+
+const (
+	tokEOF varTokenType = iota
+	tokError
+	tokNumber
+	tokString
+	tokBool
+	tokArrayStart
+	tokArrayEnd
+	tokDictStart
+	tokDictEnd
+	tokVariantStart
+	tokVariantEnd
+	tokComma
+	tokColon
+	tokType
+	tokByteString
+)
+
+type varLexer struct {
+	input  string
+	start  int
+	pos    int
+	width  int
+	tokens []varToken
+}
+
+type lexState func(*varLexer) lexState
+
+func varLex(s string) []varToken {
+	l := &varLexer{input: s}
+	l.run()
+	return l.tokens
+}
+
+func (l *varLexer) accept(valid string) bool {
+	if strings.ContainsRune(valid, l.next()) {
+		return true
+	}
+	l.backup()
+	return false
+}
+
+func (l *varLexer) backup() {
+	l.pos -= l.width
+}
+
+func (l *varLexer) emit(t varTokenType) {
+	l.tokens = append(l.tokens, varToken{t, l.input[l.start:l.pos]})
+	l.start = l.pos
+}
+
+func (l *varLexer) errorf(format string, v ...interface{}) lexState {
+	l.tokens = append(l.tokens, varToken{
+		tokError,
+		fmt.Sprintf(format, v...),
+	})
+	return nil
+}
+
+func (l *varLexer) ignore() {
+	l.start = l.pos
+}
+
+func (l *varLexer) next() rune {
+	var r rune
+
+	if l.pos >= len(l.input) {
+		l.width = 0
+		return -1
+	}
+	r, l.width = utf8.DecodeRuneInString(l.input[l.pos:])
+	l.pos += l.width
+	return r
+}
+
+func (l *varLexer) run() {
+	for state := varLexNormal; state != nil; {
+		state = state(l)
+	}
+}
+
+func (l *varLexer) peek() rune {
+	r := l.next()
+	l.backup()
+	return r
+}
+
+func varLexNormal(l *varLexer) lexState {
+	for {
+		r := l.next()
+		switch {
+		case r == -1:
+			l.emit(tokEOF)
+			return nil
+		case r == '[':
+			l.emit(tokArrayStart)
+		case r == ']':
+			l.emit(tokArrayEnd)
+		case r == '{':
+			l.emit(tokDictStart)
+		case r == '}':
+			l.emit(tokDictEnd)
+		case r == '<':
+			l.emit(tokVariantStart)
+		case r == '>':
+			l.emit(tokVariantEnd)
+		case r == ':':
+			l.emit(tokColon)
+		case r == ',':
+			l.emit(tokComma)
+		case r == '\'' || r == '"':
+			l.backup()
+			return varLexString
+		case r == '@':
+			l.backup()
+			return varLexType
+		case unicode.IsSpace(r):
+			l.ignore()
+		case unicode.IsNumber(r) || r == '+' || r == '-':
+			l.backup()
+			return varLexNumber
+		case r == 'b':
+			pos := l.start
+			if n := l.peek(); n == '"' || n == '\'' {
+				return varLexByteString
+			}
+			// not a byte string; try to parse it as a type or bool below
+			l.pos = pos + 1
+			l.width = 1
+			fallthrough
+		default:
+			// either a bool or a type. Try bools first.
+			l.backup()
+			if l.pos+4 <= len(l.input) {
+				if l.input[l.pos:l.pos+4] == "true" {
+					l.pos += 4
+					l.emit(tokBool)
+					continue
+				}
+			}
+			if l.pos+5 <= len(l.input) {
+				if l.input[l.pos:l.pos+5] == "false" {
+					l.pos += 5
+					l.emit(tokBool)
+					continue
+				}
+			}
+			// must be a type.
+			return varLexType
+		}
+	}
+}
+
+var varTypeMap = map[string]string{
+	"boolean":    "b",
+	"byte":       "y",
+	"int16":      "n",
+	"uint16":     "q",
+	"int32":      "i",
+	"uint32":     "u",
+	"int64":      "x",
+	"uint64":     "t",
+	"double":     "f",
+	"string":     "s",
+	"objectpath": "o",
+	"signature":  "g",
+}
+
+func varLexByteString(l *varLexer) lexState {
+	q := l.next()
+Loop:
+	for {
+		switch l.next() {
+		case '\\':
+			if r := l.next(); r != -1 {
+				break
+			}
+			fallthrough
+		case -1:
+			return l.errorf("unterminated bytestring")
+		case q:
+			break Loop
+		}
+	}
+	l.emit(tokByteString)
+	return varLexNormal
+}
+
+func varLexNumber(l *varLexer) lexState {
+	l.accept("+-")
+	digits := "0123456789"
+	if l.accept("0") {
+		if l.accept("x") {
+			digits = "0123456789abcdefABCDEF"
+		} else {
+			digits = "01234567"
+		}
+	}
+	for strings.ContainsRune(digits, l.next()) {
+	}
+	l.backup()
+	if l.accept(".") {
+		for strings.ContainsRune(digits, l.next()) {
+		}
+		l.backup()
+	}
+	if l.accept("eE") {
+		l.accept("+-")
+		for strings.ContainsRune("0123456789", l.next()) {
+		}
+		l.backup()
+	}
+	if r := l.peek(); unicode.IsLetter(r) {
+		l.next()
+		return l.errorf("bad number syntax: %q", l.input[l.start:l.pos])
+	}
+	l.emit(tokNumber)
+	return varLexNormal
+}
+
+func varLexString(l *varLexer) lexState {
+	q := l.next()
+Loop:
+	for {
+		switch l.next() {
+		case '\\':
+			if r := l.next(); r != -1 {
+				break
+			}
+			fallthrough
+		case -1:
+			return l.errorf("unterminated string")
+		case q:
+			break Loop
+		}
+	}
+	l.emit(tokString)
+	return varLexNormal
+}
+
+func varLexType(l *varLexer) lexState {
+	at := l.accept("@")
+	for {
+		r := l.next()
+		if r == -1 {
+			break
+		}
+		if unicode.IsSpace(r) {
+			l.backup()
+			break
+		}
+	}
+	if at {
+		if _, err := ParseSignature(l.input[l.start+1 : l.pos]); err != nil {
+			return l.errorf("%s", err)
+		}
+	} else {
+		if _, ok := varTypeMap[l.input[l.start:l.pos]]; ok {
+			l.emit(tokType)
+			return varLexNormal
+		}
+		return l.errorf("unrecognized type %q", l.input[l.start:l.pos])
+	}
+	l.emit(tokType)
+	return varLexNormal
+}

vendor/github.com/leonelquinteros/gotext/.gitignore

+# Local IDE
+.project
+.settings
+.buildpath
+.idea
+
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+cli/xgotext/fixtures/out 
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof
+*.DS_Store
\ No newline at end of file

vendor/github.com/leonelquinteros/gotext/CODE_OF_CONDUCT.md

+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at leonel.quinteros@gmail.com. The project team will review and investigate all complaints, and will respond in a way that it deems appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

vendor/github.com/leonelquinteros/gotext/CONTRIBUTING.md

+# CONTRIBUTING
+
+This open source project welcomes everybody that wants to contribute to it by implementing new features, fixing bugs, testing, creating documentation or simply talk about it. 
+
+Most contributions will start by creating a new Issue to discuss what is the contribution about and to agree on the steps to move forward. 
+
+## Issues
+
+All issues reports are welcome. Open a new Issue whenever you want to report a bug, request a change or make a proposal.
+
+This should be your start point of contribution. 
+
+
+## Pull Requests
+
+If you have any changes that can be merged, feel free to send a Pull Request. 
+
+Usually, you'd want to create a new Issue to discuss about the change you want to merge and why it's needed or what it solves. 
+

vendor/github.com/leonelquinteros/gotext/LICENSE

+The MIT License (MIT)
+
+Copyright (c) 2016 Leonel Quinteros
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
+Package `plurals`
+
+Original:
+    https://github.com/ojii/gettext.go/tree/b6dae1d7af8a8441285e42661565760b530a8a57/pluralforms
+
+License:
+    https://raw.githubusercontent.com/ojii/gettext.go/b6dae1d7af8a8441285e42661565760b530a8a57/LICENSE
+
+    Copyright (c) 2016, Jonas Obrist
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+        * Redistributions of source code must retain the above copyright
+          notice, this list of conditions and the following disclaimer.
+        * Redistributions in binary form must reproduce the above copyright
+          notice, this list of conditions and the following disclaimer in the
+          documentation and/or other materials provided with the distribution.
+        * Neither the name of Jonas Obrist nor the
+          names of its contributors may be used to endorse or promote products
+          derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL JONAS OBRIST BE LIABLE FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/leonelquinteros/gotext/README.md

+[![GitHub release](https://img.shields.io/github/release/leonelquinteros/gotext.svg)](https://github.com/leonelquinteros/gotext)
+[![MIT license](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE)
+![Gotext build](https://github.com/leonelquinteros/gotext/workflows/Gotext%20build/badge.svg)
+[![Go Report Card](https://goreportcard.com/badge/github.com/leonelquinteros/gotext)](https://goreportcard.com/report/github.com/leonelquinteros/gotext)
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/leonelquinteros/gotext)](https://pkg.go.dev/github.com/leonelquinteros/gotext)
+
+
+# Gotext
+
+[GNU gettext utilities](https://www.gnu.org/software/gettext) for Go.
+
+
+# Features
+
+- Implements GNU gettext support in native Go.
+- Complete support for [PO files](https://www.gnu.org/software/gettext/manual/html_node/PO-Files.html) including:
+  - Support for multiline strings and headers.
+  - Support for variables inside translation strings using Go's [fmt syntax](https://golang.org/pkg/fmt/).
+  - Support for [pluralization rules](https://www.gnu.org/software/gettext/manual/html_node/Translating-plural-forms.html).
+  - Support for [message contexts](https://www.gnu.org/software/gettext/manual/html_node/Contexts.html).
+- Support for MO files.
+- Thread-safe: This package is safe for concurrent use across multiple goroutines.
+- It works with UTF-8 encoding as it's the default for Go language.
+- Unit tests available.
+- Language codes are automatically simplified from the form `en_UK` to `en` if the first isn't available.
+- Ready to use inside Go templates.
+- Objects are serializable to []byte to store them in cache.
+- Support for Go Modules.
+
+
+# License
+
+[MIT license](LICENSE)
+
+
+# Documentation
+
+Refer to package documentation at (https://pkg.go.dev/github.com/leonelquinteros/gotext)
+
+
+# Installation
+
+```
+go get github.com/leonelquinteros/gotext
+```
+
+- There are no requirements or dependencies to use this package.
+- No need to install GNU gettext utilities (unless specific needs of CLI tools).
+- No need for environment variables. Some naming conventions are applied but not needed.
+
+
+# Usage examples
+
+## Using package for single language/domain settings
+
+For quick/simple translations you can use the package level functions directly.
+
+```go
+import (
+    "fmt"
+    "github.com/leonelquinteros/gotext"
+)
+
+func main() {
+    // Configure package
+    gotext.Configure("/path/to/locales/root/dir", "en_UK", "domain-name")
+
+    // Translate text from default domain
+    fmt.Println(gotext.Get("My text on 'domain-name' domain"))
+
+    // Translate text from a different domain without reconfigure
+    fmt.Println(gotext.GetD("domain2", "Another text on a different domain"))
+}
+
+```
+
+## Using dynamic variables on translations
+
+All translation strings support dynamic variables to be inserted without translate.
+Use the fmt.Printf syntax (from Go's "fmt" package) to specify how to print the non-translated variable inside the translation string.
+
+```go
+import (
+    "fmt"
+    "github.com/leonelquinteros/gotext"
+)
+
+func main() {
+    // Configure package
+    gotext.Configure("/path/to/locales/root/dir", "en_UK", "domain-name")
+
+    // Set variables
+    name := "John"
+
+    // Translate text with variables
+    fmt.Println(gotext.Get("Hi, my name is %s", name))
+}
+
+```
+
+
+## Using Locale object
+
+When having multiple languages/domains/libraries at the same time, you can create Locale objects for each variation
+so you can handle each settings on their own.
+
+```go
+import (
+    "fmt"
+    "github.com/leonelquinteros/gotext"
+)
+
+func main() {
+    // Create Locale with library path and language code
+    l := gotext.NewLocale("/path/to/locales/root/dir", "es_UY")
+
+    // Load domain '/path/to/locales/root/dir/es_UY/default.po'
+    l.AddDomain("default")
+
+    // Translate text from default domain
+    fmt.Println(l.Get("Translate this"))
+
+    // Load different domain
+    l.AddDomain("translations")
+
+    // Translate text from domain
+    fmt.Println(l.GetD("translations", "Translate this"))
+}
+```
+
+This is also helpful for using inside templates (from the "text/template" package), where you can pass the Locale object to the template.
+If you set the Locale object as "Loc" in the template, then the template code would look like:
+
+```
+{{ .Loc.Get "Translate this" }}
+```
+
+
+## Using the Po object to handle .po files and PO-formatted strings
+
+For when you need to work with PO files and strings,
+you can directly use the Po object to parse it and access the translations in there in the same way.
+
+```go
+import (
+    "fmt"
+    "github.com/leonelquinteros/gotext"
+)
+
+func main() {
+    // Set PO content
+    str := `
+msgid "Translate this"
+msgstr "Translated text"
+
+msgid "Another string"
+msgstr ""
+
+msgid "One with var: %s"
+msgstr "This one sets the var: %s"
+`
+
+    // Create Po object
+    po := gotext.NewPo()
+    po.Parse(str)
+
+    fmt.Println(po.Get("Translate this"))
+}
+```
+
+
+## Use plural forms of translations
+
+PO format supports defining one or more plural forms for the same translation.
+Relying on the PO file headers, a Plural-Forms formula can be set on the translation file
+as defined in (https://www.gnu.org/savannah-checkouts/gnu/gettext/manual/html_node/Plural-forms.html)
+
+```go
+import (
+    "fmt"
+    "github.com/leonelquinteros/gotext"
+)
+
+func main() {
+    // Set PO content
+    str := `
+msgid ""
+msgstr ""
+
+# Header below
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+msgid "Translate this"
+msgstr "Translated text"
+
+msgid "Another string"
+msgstr ""
+
+msgid "One with var: %s"
+msgid_plural "Several with vars: %s"
+msgstr[0] "This one is the singular: %s"
+msgstr[1] "This one is the plural: %s"
+`
+
+    // Create Po object
+    po := new(gotext.Po)
+    po.Parse(str)
+
+    fmt.Println(po.GetN("One with var: %s", "Several with vars: %s", 54, v))
+    // "This one is the plural: Variable"
+}
+```
+
+
+# Locales directories structure
+
+The package will assume a directories structure starting with a base path that will be provided to the package configuration
+or to object constructors depending on the use, but either will use the same convention to lookup inside the base path.
+
+Inside the base directory where will be the language directories named using the language and country 2-letter codes (en_US, es_AR, ...).
+All package functions can lookup after the simplified version for each language in case the full code isn't present but the more general language code exists.
+So if the language set is `en_UK`, but there is no directory named after that code and there is a directory named `en`,
+all package functions will be able to resolve this generalization and provide translations for the more general library.
+
+The language codes are assumed to be [ISO 639-1](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) codes (2-letter codes).
+That said, most functions will work with any coding standard as long the directory name matches the language code set on the configuration.
+
+Then, there can be a `LC_MESSAGES` containing all PO files or the PO files themselves.
+A library directory structure can look like:
+
+```
+/path/to/locales
+/path/to/locales/en_US
+/path/to/locales/en_US/LC_MESSAGES
+/path/to/locales/en_US/LC_MESSAGES/default.po
+/path/to/locales/en_US/LC_MESSAGES/extras.po
+/path/to/locales/en_UK
+/path/to/locales/en_UK/LC_MESSAGES
+/path/to/locales/en_UK/LC_MESSAGES/default.po
+/path/to/locales/en_UK/LC_MESSAGES/extras.po
+/path/to/locales/en_AU
+/path/to/locales/en_AU/LC_MESSAGES
+/path/to/locales/en_AU/LC_MESSAGES/default.po
+/path/to/locales/en_AU/LC_MESSAGES/extras.po
+/path/to/locales/es
+/path/to/locales/es/default.po
+/path/to/locales/es/extras.po
+/path/to/locales/es_ES
+/path/to/locales/es_ES/default.po
+/path/to/locales/es_ES/extras.po
+/path/to/locales/fr
+/path/to/locales/fr/default.po
+/path/to/locales/fr/extras.po
+```
+
+And so on...
+
+
+# Contribute
+
+- Please, contribute.
+- Use the package on your projects.
+- Report issues on Github.
+- Send pull requests for bugfixes and improvements.
+- Send proposals on Github issues.
+

vendor/github.com/leonelquinteros/gotext/helper.go

+/*
+ * Copyright (c) 2018 DeineAgentur UG https://www.deineagentur.com. All rights reserved.
+ * Licensed under the MIT License. See LICENSE file in the project root for full license information.
+ */
+
+package gotext
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+var re = regexp.MustCompile(`%\(([a-zA-Z0-9_]+)\)[.0-9]*[svTtbcdoqXxUeEfFgGp]`)
+
+// SimplifiedLocale simplified locale like " en_US"/"de_DE "/en_US.UTF-8/zh_CN/zh_TW/el_GR@euro/... to en_US, de_DE, zh_CN, el_GR...
+func SimplifiedLocale(lang string) string {
+	// en_US/en_US.UTF-8/zh_CN/zh_TW/el_GR@euro/...
+	if idx := strings.Index(lang, ":"); idx != -1 {
+		lang = lang[:idx]
+	}
+	if idx := strings.Index(lang, "@"); idx != -1 {
+		lang = lang[:idx]
+	}
+	if idx := strings.Index(lang, "."); idx != -1 {
+		lang = lang[:idx]
+	}
+	return strings.TrimSpace(lang)
+}
+
+// FormatString applies text formatting only when needed to parse variables.
+func FormatString(str string, vars ...interface{}) string {
+	if len(vars) > 0 {
+		return fmt.Sprintf(str, vars...)
+	}
+
+	return str
+}
+
+// Appendf applies text formatting only when needed to parse variables.
+func Appendf(b []byte, str string, vars ...interface{}) []byte {
+	if len(vars) > 0 {
+		return fmt.Appendf(b, str, vars...)
+	}
+
+	return append(b, str...)
+}
+
+// NPrintf support named format
+// NPrintf("%(name)s is Type %(type)s", map[string]interface{}{"name": "Gotext", "type": "struct"})
+func NPrintf(format string, params map[string]interface{}) {
+	f, p := parseSprintf(format, params)
+	fmt.Printf(f, p...)
+}
+
+// Sprintf support named format
+//
+//	Sprintf("%(name)s is Type %(type)s", map[string]interface{}{"name": "Gotext", "type": "struct"})
+func Sprintf(format string, params map[string]interface{}) string {
+	f, p := parseSprintf(format, params)
+	return fmt.Sprintf(f, p...)
+}
+
+func parseSprintf(format string, params map[string]interface{}) (string, []interface{}) {
+	f, n := reformatSprintf(format)
+	var p []interface{}
+	for _, v := range n {
+		p = append(p, params[v])
+	}
+	return f, p
+}
+
+func reformatSprintf(f string) (string, []string) {
+	m := re.FindAllStringSubmatch(f, -1)
+	i := re.FindAllStringSubmatchIndex(f, -1)
+
+	ord := []string{}
+	for _, v := range m {
+		ord = append(ord, v[1])
+	}
+
+	pair := []int{0}
+	for _, v := range i {
+		pair = append(pair, v[2]-1)
+		pair = append(pair, v[3]+1)
+	}
+	pair = append(pair, len(f))
+	plen := len(pair)
+
+	out := ""
+	for n := 0; n < plen; n += 2 {
+		out += f[pair[n]:pair[n+1]]
+	}
+
+	return out, ord
+}