cpbackup_domains.sh

#!/bin/sh
# list primary domains of all
# cPanel backups in the current directory.

for file in $(\ls backup-*); do
    tar --occurrence=1  \
        --to-stdout      \
        --extract         \
        --verbose          \
        --gzip              \
        --file=${file}       \
        */userdata/main |     \
        awk '/main_domain/{print $2}'
done