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logpolicy: don't put log state in /.

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Signed-off-by: David Anderson <danderson@tailscale.com>
This commit is contained in:
David Anderson 2020-04-04 17:18:04 -07:00 committed by Dave Anderson
parent 364a8508b2
commit 0dac03876a
1 changed files with 16 additions and 4 deletions
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20
logpolicy/logpolicy.go
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@ -111,10 +111,22 @@ func logsDir() string {
return filepath.Join(cacheDir, "Tailscale")
}
// No idea where to put stuff. This only happens when $HOME is
// unset, which os.UserCacheDir doesn't like. Use the current
// working directory and hope for the best.
return ""
// Use the current working directory, unless we're being run by a
// service manager that sets it to /.
wd, err := os.Getwd()
if err == nil && wd != "/" {
return wd
}
// No idea where to put stuff. Try to create a temp dir. It'll
// mean we might lose some logs and rotate through log IDs, but
// it's something.
tmp, err := ioutil.TempDir("", "tailscaled-log-*")
if err != nil {
panic("no safe place found to store log state")
}
return tmp
}
// runningUnderSystemd reports whether we're running under systemd.