From 9d4eddcef8ce64e81be417abc24e4bcf0335a474 Mon Sep 17 00:00:00 2001
From: julianknodt <julianknodt@gmail.com>
Date: Wed, 14 Jul 2021 15:20:38 -0700
Subject: [PATCH] cmd/derper: add default -c arguments

This adds some convenient defaults for -c, so that user-provided DERPs require less command line
flags.

Signed-off-by: julianknodt <julianknodt@gmail.com>
---
 cmd/derper/derper.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/cmd/derper/derper.go b/cmd/derper/derper.go
index 3af280610..a83e7a39f 100644
--- a/cmd/derper/derper.go
+++ b/cmd/derper/derper.go
@@ -58,7 +58,12 @@ func loadConfig() config {
 		return config{PrivateKey: mustNewKey()}
 	}
 	if *configPath == "" {
-		log.Fatalf("derper: -c <config path> not specified")
+		if os.Getuid() == 0 {
+			*configPath = "/var/lib/derper/derper.key"
+		} else {
+			*configPath = "derper.key"
+		}
+		log.Printf("no config path specified; using %s", *configPath)
 	}
 	b, err := ioutil.ReadFile(*configPath)
 	switch {