--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.incubator.jpackage/linux/classes/jdk/incubator/jpackage/internal/resources/utils.sh	Fri Nov 08 14:53:03 2019 -0500
@@ -0,0 +1,104 @@
+#
+# Remove $1 desktop file from the list of default handlers for $2 mime type
+# in $3 file dumping output to stdout.
+#
+_filter_out_default_mime_handler ()
+{
+  local defaults_list="$3"
+
+  local desktop_file="$1"
+  local mime_type="$2"
+
+  awk -f- "$defaults_list" <<EOF
+  BEGIN {
+    mime_type="$mime_type"
+    mime_type_regexp="~" mime_type "="
+    desktop_file="$desktop_file"
+  }
+  \$0 ~ mime_type {
+    \$0 = substr(\$0, length(mime_type) + 2);
+    split(\$0, desktop_files, ";")
+    remaining_desktop_files
+    counter=0
+    for (idx in desktop_files) {
+      if (desktop_files[idx] != desktop_file) {
+        ++counter;
+      }
+    }
+    if (counter) {
+      printf mime_type "="
+      for (idx in desktop_files) {
+        if (desktop_files[idx] != desktop_file) {
+          printf desktop_files[idx]
+          if (--counter) {
+            printf ";"
+          }
+        }
+      }
+      printf "\n"
+    }
+    next
+  }
+
+  { print }
+EOF
+}
+
+
+#
+# Remove $2 desktop file from the list of default handlers for $@ mime types
+# in $1 file.
+# Result is saved in $1 file.
+#
+_uninstall_default_mime_handler ()
+{
+  local defaults_list=$1
+  shift
+  [ -f "$defaults_list" ] || return 0
+
+  local desktop_file="$1"
+  shift
+
+  tmpfile1=$(mktemp)
+  tmpfile2=$(mktemp)
+  cat "$defaults_list" > "$tmpfile1"
+
+  local v
+  local update=
+  for mime in "$@"; do
+    _filter_out_default_mime_handler "$desktop_file" "$mime" "$tmpfile1" > "$tmpfile2"
+    v="$tmpfile2"
+    tmpfile2="$tmpfile1"
+    tmpfile1="$v"
+
+    if ! diff -q "$tmpfile1" "$tmpfile2" > /dev/null; then
+      update=yes
+      trace Remove $desktop_file default handler for $mime mime type from $defaults_list file
+    fi
+  done
+
+  if [ -n "$update" ]; then
+    cat "$tmpfile1" > "$defaults_list"
+    trace "$defaults_list" file updated
+  fi
+
+  rm -f "$tmpfile1" "$tmpfile2"
+}
+
+
+#
+# Remove $1 desktop file from the list of default handlers for $@ mime types
+# in all known system defaults lists.
+#
+uninstall_default_mime_handler ()
+{
+  for f in /usr/share/applications/defaults.list /usr/local/share/applications/defaults.list; do
+    _uninstall_default_mime_handler "$f" "$@"
+  done
+}
+
+
+trace ()
+{
+  echo "$@"
+}