tang/debian/tang-common.postinst

#!/bin/sh

set -eu

db_dir_old='/var/db/tang'
db_dir='/var/lib/tang'

case "$1" in
    configure)
        if ! getent passwd _tang >/dev/null; then
            adduser --quiet --system --group --no-create-home --home /nonexistent --force-badname _tang
        fi

        # Migrate tang db:
        # * Change location
        # * Give it to _tang user
        # This cannot be anchored to a version since the initial setup used
        # to be in the tang package.
        # (Retire after bookworm release)
        if
            [ -d "$db_dir_old" ] &&
                [ ! -d "$db_dir" ]
        then
            echo 'I: Migrating tang db'
            mv "$db_dir_old" "$db_dir"
            chown -R _tang:_tang "$db_dir"
        fi

        # Possibly remove /var/db/
        # (Retire after bookworm release)
        if [ -d /var/db/ ]; then
            rmdir /var/db/ >/dev/null 2>&1 || :
        fi

        # assert db directory
        mkdir -p "$db_dir"
        chown _tang:_tang "$db_dir"
        chmod 0750 "$db_dir"

        ;;
    abort-upgrade | abort-remove | abort-deconfigure) ;;

    *)
        echo "postinst called with unknown argument '$1'" >&2
        exit 1
        ;;
esac

#DEBHELPER#
exit 0