vm: fix potential null deref

[minix.git] / releasetools / nbsd_diff.sh

#!/bin/sh
diff=$3
rm -f "$diff"
if [ ! -d "$1" -o ! -d "$2" ]
then    echo Skipping $diff
        exit 0
fi
diff -aru $1 $2 | \
        sed /"^Only in"/d | \
        sed -e 's/^\(---.*\)\t.*/\1/' | \
        sed -e 's/^\(\+\+\+.*\)\t.*/\1/' > $diff

if [ ! -s "$diff" ]
then    rm -f "$diff"
fi