Adding functions equivalent to chmod/chown --reference.

This option is apparently not present in busybox.

diff --git a/scripts/live-helpers b/scripts/live-helpers
index ce28742..860e6ff 100644 (file)
--- a/scripts/live-helpers
+++ b/scripts/live-helpers
@@ -530,6 +530,24 @@ what_is_mounted_on ()
        grep -m1 "^[^ ]\+ ${dir} " /proc/mounts | cut -d' ' -f1
 }
 
+chown_ref ()
+{
+       local reference="${1}"
+       shift
+       local targets=${@}
+       local owner=$(stat -c %u:%g "${reference}")
+       chown -h ${owner} ${targets}
+}
+
+chmod_ref ()
+{
+       local reference="${1}"
+       shift
+       local targets=${@}
+       local rights=$(stat -c %a "${reference}")
+       chmod ${rights} ${targets}
+}
+
 lastline ()
 {
        while read lines
@@ -1164,8 +1182,8 @@ link_files ()
                        then
                                mkdir -p "${dest}"
                                prev="$(dirname "${dest}")"
-                               chown --reference "${prev}" "${dest}"
-                               chmod --reference "${prev}" "${dest}"
+                               chown_ref "${prev}" "${dest}"
+                               chmod_ref "${prev}" "${dest}"
                        fi
                        link_files "${src}" "${dest}" "${src_mask}"
                else
@@ -1433,8 +1451,8 @@ activate_custom_mounts ()
                                # unions and don't need to be bootstrapped
                                # linkfiles dirs can't be bootstrapped in a sensible way
                                mkdir -p "${source}"
-                               chown --reference "${dest}" "${source}"
-                               chmod --reference "${dest}" "${source}"
+                               chown_ref "${dest}" "${source}"
+                               chmod_ref "${dest}" "${source}"
                        else
                                # ensure that $dest is not copied *into* $source
                                mkdir -p "$(dirname ${source})"
@@ -1494,8 +1512,8 @@ activate_custom_mounts ()
                                rm -rf "${cow_dir}"
                        fi
                        mkdir -p ${cow_dir}
-                       chown --reference "${source}" "${cow_dir}"
-                       chmod --reference "${source}" "${cow_dir}"
+                       chown_ref "${source}" "${cow_dir}"
+                       chmod_ref "${source}" "${cow_dir}"
                        do_union ${dest} ${cow_dir} ${source} ${rofs_dest_backing}
                fi