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logpolicy: consider /var/lib/tailscale when no STATE_DIRECTORY

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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2020-08-10 20:44:26 -07:00
parent 1f7a7a4ffe
commit 5a0c37aafd
1 changed files with 12 additions and 0 deletions
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12
logpolicy/logpolicy.go
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@ -31,6 +31,7 @@
"tailscale.com/logtail/filch"
"tailscale.com/net/netns"
"tailscale.com/net/tlsdial"
"tailscale.com/paths"
"tailscale.com/smallzstd"
"tailscale.com/types/logger"
"tailscale.com/version"
@ -103,12 +104,23 @@ func (l logWriter) Write(buf []byte) (int, error) {
// logsDir returns the directory to use for log configuration and
// buffer storage.
func logsDir(logf logger.Logf) string {
// STATE_DIRECTORY is set by systemd 240+ but we support older
// systems-d. For example, Ubuntu 18.04 (Bionic Beaver) is 237.
systemdStateDir := os.Getenv("STATE_DIRECTORY")
if systemdStateDir != "" {
logf("logpolicy: using $STATE_DIRECTORY, %q", systemdStateDir)
return systemdStateDir
}
// Default to e.g. /var/lib/tailscale or /var/db/tailscale on Unix.
if d := paths.DefaultTailscaledStateFile(); d != "" {
d = filepath.Dir(d) // directory of e.g. "/var/lib/tailscale/tailscaled.state"
if err := os.MkdirAll(d, 0700); err == nil {
logf("logpolicy: using system state directory %q", d)
return d
}
}
cacheDir, err := os.UserCacheDir()
if err == nil {
d := filepath.Join(cacheDir, "Tailscale")