path: root/localrmstaleaccounts

#!/bin/sh

set -e

exit1() (
    echo >&2 "ERROR: $1"
    exit 1
)

warn() (
    echo >&2 "WARNING: $1"
)

backupdeluser() {
    set -e
    u="$1"; shift
    p=/var/backups/users-dropped/
    getent passwd "$u" > "$p/$u.getent"
    getent group "$u" >> "$p/$u.getent"
    deluser --remove-home --backup --backup-to "$p" "$u"
}

maybestaleuser() {
    warn "Skipping possibly non-stale account for user $user"
}

untouchedinbox() {
    set -e
    h="$1"; shift
    [ -d "$home/Maildir" ]
    find "$home/Maildir/new" -maxdepth 0 -type d -mtime +365 | grep -q .
    find "$home/Maildir/cur" -maxdepth 0 -type d -mtime +365 | grep -q .
}

untouchednewmail() {
    set -e
    h="$1"; shift
    [ -d "$home/Maildir" ]
    find "$home/Maildir/new" -type f -mtime +365 | grep -q
}

for user in $@; do
    home=$(getent passwd "$user" | cut -d: -f6)
    [ -n "$home" ] || exit1 "Failed resolving homedir for user $user"
    if [ -e "$home/.forward" ]; then
        maybestaleuser "$user"
        continue
    fi
    if untouchedinbox "$home" || untouchednewmail "$home"; then
        backupdeluser "$user"
        continue
    fi
    maybestaleuser "$user"
done