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tailscale/paths/paths_unix.go

53 lines
1.1 KiB
Go

// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !windows
package paths
import (
"path/filepath"
"runtime"
"golang.org/x/sys/unix"
)
func init() {
stateFileFunc = stateFileUnix
}
func statePath() string {
switch runtime.GOOS {
case "linux":
return "/var/lib/tailscale/tailscaled.state"
case "freebsd", "openbsd":
return "/var/db/tailscale/tailscaled.state"
case "darwin":
return "/Library/Tailscale/tailscaled.state"
default:
return ""
}
}
func stateFileUnix() string {
path := statePath()
if path == "" {
return ""
}
try := path
for i := 0; i < 3; i++ { // check writability of the file, /var/lib/tailscale, and /var/lib
err := unix.Access(try, unix.O_RDWR)
if err == nil {
return path
}
try = filepath.Dir(try)
}
// TODO: try some $HOME/.tailscale or XDG path? But will it
// even work usefully enough as non-root? Probably not. Maybe
// best to require it be explicit in that case.
return ""
}