The clamav-base.postinst.in includes code to create the clamav user, but this only runs on fresh installations (i.e. when the second arg to the postinst is blank). If somehow you had clamav installed but the clamav user and/or group had been removed (or had never been properly set up to begin with), then the code to create the user is skipped. The subsequent chown then fails, obviously.
My proposed fix would be: --- a/debian/clamav-base.postinst +++ b/debian/clamav-base.postinst @@ -23,20 +23,18 @@ configure) DATABASEDIR=/var/lib/clamav LOGDIR=/var/log/clamav user=clamav # Set up the clamav user on new install - if [ -z "$2" ]; then - if ! getent passwd clamav >/dev/null; then - adduser --system --no-create-home --quiet \ - --disabled-password --disabled-login \ - --shell /bin/false --group --home /var/lib/clamav clamav - fi - if [ -f /etc/aliases ] || [ -L /etc/aliases ]; then - if ! grep -qi "^clamav" /etc/aliases; then - echo "clamav: root" >> /etc/aliases - newal=`which newaliases || true` - if [ -n "$newal" ] && [ -x "$newal" ]; then - $newal || true - fi - fi - fi - fi + if ! getent passwd clamav >/dev/null; then + adduser --system --no-create-home --quiet \ + --disabled-password --disabled-login \ + --shell /bin/false --group --home /var/lib/clamav clamav + fi + if [ -f /etc/aliases ] || [ -L /etc/aliases ]; then + if ! grep -qi "^clamav" /etc/aliases; then + echo "clamav: root" >> /etc/aliases + newal=`which newaliases || true` + if [ -n "$newal" ] && [ -x "$newal" ]; then + $newal || true + fi + fi + fi chown $user:$user $DATABASEDIR chown $user:$user $LOGDIR ;; This patch will move the entire user creation and aliases setup block outside the if [ -z "$2" ] conditional, ensuring that the clamav user and group are always created if missing, regardless of whether it's a first install or an upgrade. I think this should fix the issue. ** Tags added: server-todo -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2115832 Title: package clamav-base 1.4.3+dfsg-0ubuntu0.24.04.1 failed to install/upgrade: chown: invalid user: ‘clamav:clamav’ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/clamav/+bug/2115832/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
