rewrite scripts

try to provide better syntax and avoid using bash

debian/templates/image.postrm.in

@@ -1,31 +1,54 @@
-#!/bin/sh -e
+#!/bin/sh
+set -e
 
-version=@abiname@@localversion@
-image_path=/boot/@image-stem@-$version
+version='@abiname@@localversion@'
+image_path="/boot/@image-stem@-${version}"
 
-rm -f /lib/modules/$version/.fresh-install
+rm -f "/lib/modules/${version}/.fresh-install"
 
-if [ "$1" != upgrade ] && command -v linux-update-symlinks >/dev/null; then
-    linux-update-symlinks remove $version $image_path
+if [ "$1" != upgrade ] && command -v linux-update-symlinks >/dev/null ; then
+    linux-update-symlinks remove "${version}" "${image_path}"
 fi
 
-if [ -d /etc/kernel/postrm.d ]; then
-    DEB_MAINT_PARAMS="$*" run-parts --report --exit-on-error --arg=$version \
-	      --arg=$image_path /etc/kernel/postrm.d
+if [ -d /etc/kernel/postrm.d ] ; then
+    DEB_MAINT_PARAMS="$*" \
+    run-parts --report --exit-on-error \
+      "--arg=${version}" \
+      "--arg=${image_path}" \
+    /etc/kernel/postrm.d
 fi
 
 if [ "$1" = purge ]; then
-    for extra_file in modules.dep modules.isapnpmap modules.pcimap \
-                      modules.usbmap modules.parportmap \
-                      modules.generic_string modules.ieee1394map \
-                      modules.ieee1394map modules.pnpbiosmap \
-                      modules.alias modules.ccwmap modules.inputmap \
-                      modules.symbols modules.ofmap \
-                      modules.seriomap modules.\*.bin \
-                      modules.softdep modules.weakdep modules.devname; do
-	eval rm -f /lib/modules/$version/$extra_file
+    for extra_file in \
+     'modules.*.bin' \
+      modules.alias \
+      modules.ccwmap \
+      modules.dep \
+      modules.devname \
+      modules.generic_string \
+      modules.ieee1394map \
+      modules.inputmap \
+      modules.isapnpmap \
+      modules.ofmap \
+      modules.parportmap \
+      modules.pcimap \
+      modules.pnpbiosmap \
+      modules.seriomap \
+      modules.softdep \
+      modules.symbols \
+      modules.usbmap \
+      modules.weakdep \
+    ; do
+        case "${extra_file}" in
+        *\** | *\?* )
+            find "/lib/modules/${version}/" -mindepth 1 -maxdepth 1 -name "${extra_file}" -exec rm -f {} +
+        ;;
+        * )
+            rm -f "/lib/modules/${version}/${extra_file}"
+        ;;
+        esac
     done
-    rmdir /lib/modules/$version || true
+    rmdir "/lib/modules/${version}" || true
 fi
 
 exit 0