config flag for debug output

diff --git a/index.cgi b/index.cgi
index ae9ac2a8325b96727ca8ce0fb6d8d11a8abeb17c..ee0d6f7200900df4e43ba1a2347da90fca72006b 100755 (executable)
--- a/index.cgi
+++ b/index.cgi
@@ -3,11 +3,12 @@
 for n in "$@"; do case ${n%%=*} in
   data) _DATA="${n#data=}";;
   exec) _EXEC="${n#exec=}";;
-  noerr) exec 2>&-;;
+  debug) DEBUG="${n#debug=}";;
 esac; done
 
-[ -z "${_EXEC%/}" ] && _EXEC="$(realpath "${0%/*}")" || _EXEC="${_EXEC%/}"
-[ -z "${_DATA%/}" ] && _DATA=. || _DATA="${_DATA%/}"
+[ ! "${_EXEC%/}" ] && _EXEC="$(realpath "${0%/*}")" || _EXEC="${_EXEC%/}"
+[ ! "${_DATA%/}" ] && _DATA=. || _DATA="${_DATA%/}"
+[ "$DEBUG" ] && exec 2>>"$DEBUG"
 
 mkdir -p "${_DATA}/cache" "${_DATA}/mappings" "${_DATA}/export" "${_DATA}/lock" "${_DATA}/ical" "${_DATA}/vcard"