1 files changed, 28 insertions, 0 deletions
diff --git a/office/pdfpc/doinst.sh b/office/pdfpc/doinst.sh
new file mode 100644
index 0000000000000..86b31261ec9d5
--- /dev/null
+++ b/office/pdfpc/doinst.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+# vim: et ts=2 sw=2
+
+config() {
+  NEW="$1"
+  OLD="${NEW%*.new}"
+  # If there's no config file by that name, mv it over:
+  if [ ! -r $OLD ]; then
+    mv $NEW $OLD
+  elif [ "$(cat $OLD | md5sum)" = "$(cat $NEW | md5sum)" ]; then # toss the redundant copy
+    rm $NEW
+  fi
+  # Otherwise, we leave the .new copy for the admin to consider...
+}
+
+preserve_perms() {
+  NEW="$1"
+  OLD="$(dirname $NEW)/$(basename $NEW .new)"
+  if [ -e $OLD ]; then
+    cp -a $OLD ${NEW}.incoming
+    cat $NEW > ${NEW}.incoming
+    mv ${NEW}.incoming $NEW
+  fi
+  config $NEW
+}
+
+preserve_perms etc/pdfpcrc.new
+