robustness and satisfy shellcheck

[distro-setup] / primary-setup

diff --git a/primary-setup b/primary-setup
index 1a6ce0e05158124c1078040fdf24b1ab7f6cf068..30c4222a7bc9c3cdfb6885546a147c4b8225438f 100755 (executable)
--- a/primary-setup
+++ b/primary-setup
@@ -1,11 +1,16 @@
 #!/bin/bash
 
 # usage $0 [MAIL_HOST]
+# setup things which involve being the primary host or not
 
 set -eE -o pipefail
 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
 
-# setup things which involve being the primary host or not
+
+if [[ ! $SUDO_USER || $EUID == 0 ]]; then
+  echo "$0: error: requires running as nonroot or sudo"
+  exit 1
+fi
 
 if [[ $1 ]]; then
   new_host=$1