1 files changed, 139 insertions, 139 deletions
diff --git a/version/cmdname.go b/version/cmdname.go
index 51e065438..9f85ef96d 100644
--- a/version/cmdname.go
+++ b/version/cmdname.go
@@ -1,139 +1,139 @@
-// Copyright (c) Tailscale Inc & AUTHORS
-// SPDX-License-Identifier: BSD-3-Clause
-
-//go:build !ios
-
-package version
-
-import (
-	"bytes"
-	"encoding/hex"
-	"errors"
-	"io"
-	"os"
-	"path"
-	"path/filepath"
-	"strings"
-)
-
-// CmdName returns either the base name of the current binary
-// using os.Executable. If os.Executable fails (it shouldn't), then
-// "cmd" is returned.
-func CmdName() string {
-	e, err := os.Executable()
-	if err != nil {
-		return "cmd"
-	}
-	return cmdName(e)
-}
-
-func cmdName(exe string) string {
-	// fallbackName, the lowercase basename of the executable, is what we return if
-	// we can't find the Go module metadata embedded in the file.
-	fallbackName := filepath.Base(strings.TrimSuffix(strings.ToLower(exe), ".exe"))
-
-	var ret string
-	info, err := findModuleInfo(exe)
-	if err != nil {
-		return fallbackName
-	}
-	// v is like:
-	// "path\ttailscale.com/cmd/tailscale\nmod\ttailscale.com\t(devel)\t\ndep\tgithub.com/apenwarr/fixconsole\tv0.0.0-20191012055117-5a9f6489cc29\th1:muXWUcay7DDy1/hEQWrYlBy+g0EuwT70sBHg65SeUc4=\ndep\tgithub....
-	for _, line := range strings.Split(info, "\n") {
-		if goPkg, ok := strings.CutPrefix(line, "path\t"); ok { // like "tailscale.com/cmd/tailscale"
-			ret = path.Base(goPkg) // goPkg is always forward slashes; use path, not filepath
-			break
-		}
-	}
-	if strings.HasPrefix(ret, "wg") && fallbackName == "tailscale-ipn" {
-		// The tailscale-ipn.exe binary for internal build system packaging reasons
-		// has a path of "tailscale.io/win/wg64", "tailscale.io/win/wg32", etc.
-		// Ignore that name and use "tailscale-ipn" instead.
-		return fallbackName
-	}
-	if ret == "" {
-		return fallbackName
-	}
-	return ret
-}
-
-// findModuleInfo returns the Go module info from the executable file.
-func findModuleInfo(file string) (s string, err error) {
-	f, err := os.Open(file)
-	if err != nil {
-		return "", err
-	}
-	defer f.Close()
-	// Scan through f until we find infoStart.
-	buf := make([]byte, 65536)
-	start, err := findOffset(f, buf, infoStart)
-	if err != nil {
-		return "", err
-	}
-	start += int64(len(infoStart))
-	// Seek to the end of infoStart and scan for infoEnd.
-	_, err = f.Seek(start, io.SeekStart)
-	if err != nil {
-		return "", err
-	}
-	end, err := findOffset(f, buf, infoEnd)
-	if err != nil {
-		return "", err
-	}
-	length := end - start
-	// As of Aug 2021, tailscaled's mod info was about 2k.
-	if length > int64(len(buf)) {
-		return "", errors.New("mod info too large")
-	}
-	// We have located modinfo. Read it into buf.
-	buf = buf[:length]
-	_, err = f.Seek(start, io.SeekStart)
-	if err != nil {
-		return "", err
-	}
-	_, err = io.ReadFull(f, buf)
-	if err != nil {
-		return "", err
-	}
-	return string(buf), nil
-}
-
-// findOffset finds the absolute offset of needle in f,
-// starting at f's current read position,
-// using temporary buffer buf.
-func findOffset(f *os.File, buf, needle []byte) (int64, error) {
-	for {
-		// Fill buf and look within it.
-		n, err := f.Read(buf)
-		if err != nil {
-			return -1, err
-		}
-		i := bytes.Index(buf[:n], needle)
-		if i < 0 {
-			// Not found. Rewind a little bit in case we happened to end halfway through needle.
-			rewind, err := f.Seek(int64(-len(needle)), io.SeekCurrent)
-			if err != nil {
-				return -1, err
-			}
-			// If we're at EOF and rewound exactly len(needle) bytes, return io.EOF.
-			_, err = f.ReadAt(buf[:1], rewind+int64(len(needle)))
-			if err == io.EOF {
-				return -1, err
-			}
-			continue
-		}
-		// Found! Figure out exactly where.
-		cur, err := f.Seek(0, io.SeekCurrent)
-		if err != nil {
-			return -1, err
-		}
-		return cur - int64(n) + int64(i), nil
-	}
-}
-
-// These constants are taken from rsc.io/goversion.
-
-var (
-	infoStart, _ = hex.DecodeString("3077af0c9274080241e1c107e6d618e6")
-	infoEnd, _   = hex.DecodeString("f932433186182072008242104116d8f2")
-)
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+//go:build !ios
+
+package version
+
+import (
+	"bytes"
+	"encoding/hex"
+	"errors"
+	"io"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+)
+
+// CmdName returns either the base name of the current binary
+// using os.Executable. If os.Executable fails (it shouldn't), then
+// "cmd" is returned.
+func CmdName() string {
+	e, err := os.Executable()
+	if err != nil {
+		return "cmd"
+	}
+	return cmdName(e)
+}
+
+func cmdName(exe string) string {
+	// fallbackName, the lowercase basename of the executable, is what we return if
+	// we can't find the Go module metadata embedded in the file.
+	fallbackName := filepath.Base(strings.TrimSuffix(strings.ToLower(exe), ".exe"))
+
+	var ret string
+	info, err := findModuleInfo(exe)
+	if err != nil {
+		return fallbackName
+	}
+	// v is like:
+	// "path\ttailscale.com/cmd/tailscale\nmod\ttailscale.com\t(devel)\t\ndep\tgithub.com/apenwarr/fixconsole\tv0.0.0-20191012055117-5a9f6489cc29\th1:muXWUcay7DDy1/hEQWrYlBy+g0EuwT70sBHg65SeUc4=\ndep\tgithub....
+	for _, line := range strings.Split(info, "\n") {
+		if goPkg, ok := strings.CutPrefix(line, "path\t"); ok { // like "tailscale.com/cmd/tailscale"
+			ret = path.Base(goPkg) // goPkg is always forward slashes; use path, not filepath
+			break
+		}
+	}
+	if strings.HasPrefix(ret, "wg") && fallbackName == "tailscale-ipn" {
+		// The tailscale-ipn.exe binary for internal build system packaging reasons
+		// has a path of "tailscale.io/win/wg64", "tailscale.io/win/wg32", etc.
+		// Ignore that name and use "tailscale-ipn" instead.
+		return fallbackName
+	}
+	if ret == "" {
+		return fallbackName
+	}
+	return ret
+}
+
+// findModuleInfo returns the Go module info from the executable file.
+func findModuleInfo(file string) (s string, err error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+	// Scan through f until we find infoStart.
+	buf := make([]byte, 65536)
+	start, err := findOffset(f, buf, infoStart)
+	if err != nil {
+		return "", err
+	}
+	start += int64(len(infoStart))
+	// Seek to the end of infoStart and scan for infoEnd.
+	_, err = f.Seek(start, io.SeekStart)
+	if err != nil {
+		return "", err
+	}
+	end, err := findOffset(f, buf, infoEnd)
+	if err != nil {
+		return "", err
+	}
+	length := end - start
+	// As of Aug 2021, tailscaled's mod info was about 2k.
+	if length > int64(len(buf)) {
+		return "", errors.New("mod info too large")
+	}
+	// We have located modinfo. Read it into buf.
+	buf = buf[:length]
+	_, err = f.Seek(start, io.SeekStart)
+	if err != nil {
+		return "", err
+	}
+	_, err = io.ReadFull(f, buf)
+	if err != nil {
+		return "", err
+	}
+	return string(buf), nil
+}
+
+// findOffset finds the absolute offset of needle in f,
+// starting at f's current read position,
+// using temporary buffer buf.
+func findOffset(f *os.File, buf, needle []byte) (int64, error) {
+	for {
+		// Fill buf and look within it.
+		n, err := f.Read(buf)
+		if err != nil {
+			return -1, err
+		}
+		i := bytes.Index(buf[:n], needle)
+		if i < 0 {
+			// Not found. Rewind a little bit in case we happened to end halfway through needle.
+			rewind, err := f.Seek(int64(-len(needle)), io.SeekCurrent)
+			if err != nil {
+				return -1, err
+			}
+			// If we're at EOF and rewound exactly len(needle) bytes, return io.EOF.
+			_, err = f.ReadAt(buf[:1], rewind+int64(len(needle)))
+			if err == io.EOF {
+				return -1, err
+			}
+			continue
+		}
+		// Found! Figure out exactly where.
+		cur, err := f.Seek(0, io.SeekCurrent)
+		if err != nil {
+			return -1, err
+		}
+		return cur - int64(n) + int64(i), nil
+	}
+}
+
+// These constants are taken from rsc.io/goversion.
+
+var (
+	infoStart, _ = hex.DecodeString("3077af0c9274080241e1c107e6d618e6")
+	infoEnd, _   = hex.DecodeString("f932433186182072008242104116d8f2")
+)