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#!/bin/sh
#
# Generate an unified diff of the list of microcodes included in the
# latest two Intel-supplied Microcode packs (microcode-<date>.dat)
#
# Use this to locate updated/removed/added microcodes. Further manual
# analysis is necessary to identify the deletion of recently-added
# or recently-updated microcode, and the addition of previously-deleted
# microcode (often with a version downgrade).
#
# Run this from the directory with the Intel microcode packs.
export LC_COLLATE=C
PATH=${PATH}:/sbin:/usr/sbin
FILES=$(ls -1 microcode-*.dat | tail -n 2 | xargs)
DFILES=
for i in $FILES ; do
fn=$(basename $i)
iucode_tool -q -l $i | sed -e 's/^[^:]\+: //' | sort | grep sig > /tmp/$fn.list
DFILES="${DFILES} /tmp/$fn.list"
done
diff --unified=1 ${DFILES} | grep sig | sort -k 2
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