Support URLs pointing to a zip file

icscheck/icscheck.sh

@@ -53,6 +53,8 @@ icscheck() {
 
   for arg in "${@}" ; do
     case "${1:-}" in
+      --debug|-d)
+        set -o xtrace && shift ;;
       --help|-h)
         icsusage && return 0 ;; 
       --renew|-r)
@@ -79,6 +81,11 @@ icscheck() {
 
   curl -L "${ics_url}" -H "User-Agent: ${icsconf_useragent:?}" -o "${ics_down_file}" >/dev/null 2>&1
 
+  if [ -n "${icsconf_zip:-}" ]; then
+    unzip -oqq "${ics_down_file}" "${icsconf_zip}" -d "${ics_temp_dir}"
+    mv -f "${ics_temp_dir}/${icsconf_zip}" "${ics_down_file}"
+  fi
+
   # -s : exists and size greater zero
   if [ ! -s "$ics_down_file" ] || [ ! -r "$ics_down_file" ]; then
     icsError 
@@ -105,3 +112,4 @@ icscheck() {
 }
 
 icscheck "${@}"
+