1 files changed, 11 insertions, 1 deletions
diff --git a/configure b/configure
index 6763731..44db647 100755
--- a/configure
+++ b/configure
@@ -1,10 +1,20 @@
-#!/bin/bash
+#!/bin/sh
 
 vars="gitd_ip gitd_basepath git_name git_email tinydns_config tinydns__rootsrvrname tinydns__rootsrvrip tinydns__tldsrvrname tinydns__tldsrvrip tinydns__srvrip tinydns__srvrname"
 
 echo "Welcome to the resdb configurator!" >&2
 echo >&2
 
+if ! echo "$var=${!var}" >/dev/null 2>&1; then
+ echo "Your shell sucks.  If you're using a stupid OS like Ubuntu that doesn't" >&2
+ echo "give a damn about backwards compatibility, I'd suggest fixing your" >&2
+ echo "default shell, which you can do by typing \"ln -s bash /bin/sh\" at a" >&2
+ echo "root shell prompt." >&2
+ echo "If you have some ancient Unix system, I'd suggest installing bash." >&2
+ echo "If you have questions, you can always bother SRN :-)" >&2
+ exit 1
+fi
+
 for var in $vars ; do
  export "$var"="$(cat conf/$var 2>/dev/null)"
 done