First etcdiff import, proof of concept

diff --git a/etcdiff.sh b/etcdiff.sh
new file mode 100755 (executable)
index 0000000..b8a3be6
--- /dev/null
+++ b/etcdiff.sh
@@ -0,0 +1,55 @@
+#!/bin/sh
+#
+# etcdiff (deb-etcdiff?) shows how your current /etc dir
+# diverges from the debian distribution standard one.
+#
+# Copyright (C) 2008 Antonio Ospite <ospite@studenti.unina.it>
+# License: GPLv2 or later
+
+set -ex
+
+PROMPT_RM=-i
+
+DEBIANMIRROR="http://ftp.it.debian.org/debian"
+
+rm $PROMPT_RM -r temp     && mkdir temp
+rm $PROMPT_RM -r archives && mkdir archives
+rm $PROMPT_RM -r conf     && mkdir -p conf/patches
+
+USERMODE="-perm /o+r"
+MAXDEPTH="-maxdepth 1"
+
+#FILES="/etc/sysctl.conf /etc/init.d/procps /etc/passwd-"
+FILES=$(find /etc/ $MAXDEPTH -type f $USERMODE | grep -v '.dpkg-')
+
+for file in ${FILES};
+do
+  echo "-> $file"
+
+  # Find out what installed package provides the config file
+  PACKAGE=$(dpkg-query -S "$file" | cut -d ':' -f 1 | uniq 2> /dev/null)
+
+  # Copy the whole file if it is not provided by default
+  if [ "x$PACKAGE" == "x" ];
+  then
+    cp "$file" conf/
+    continue
+  fi
+
+  # Get the package from the repository and diff
+
+  FILENAME=$(apt-cache show $PACKAGE | grep ^Filename | cut -d ' ' -f 2-)
+  ARCHIVE=$(basename $FILENAME)
+
+  (cd archives && wget -q -nc -c $DEBIANMIRROR/$FILENAME)
+  dpkg -x archives/$ARCHIVE temp/
+
+  diff -q temp/$file $file > /dev/null
+  if [ $? -eq 1 ];
+  then
+    diff -u temp/$file $file > conf/patches/$(basename $file).patch
+  else
+    echo "$file: not changed"
+  fi
+
+done