/etc/cron.daily/upstart is in upstart 1.13.2-0ubuntu21.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | #!/bin/sh
# For each Upstart Session Init, emit "rotate-logs" event, requesting
# the session Inits to rotate their logs. There is no user-daily cron.
#
# Doing it this way does not rely on System Upstart, nor
# upstart-event-bridge(8) running in the Session Init.
#
# Note that system-level Upstart logs are handled separately using a
# logrotate script.
[ -x /sbin/initctl ] || exit 0
for file in /run/user/*/upstart/sessions/*.session
do
[ -f "$file" ] || continue
[ -h "$file" ] && continue
file_uid=$(stat -c %u "$file")
[ -n "$file_uid" ] || continue
session=$(grep \
"^UPSTART_SESSION=unix:abstract=/com/ubuntu/upstart-session/[0-9][0-9]*/[0-9][0-9]*$" \
"$file" 2>/dev/null || true)
[ -n "$session" ] || continue
session_uid=$(echo "$session" | cut -d\/ -f5)
[ -n "$session_uid" ] || continue
# Don't allow a user to spoof logrotation for another user.
[ "$file_uid" = "$session_uid" ] || continue
env -i "$session" /sbin/initctl emit rotate-logs >/dev/null 2>&1 || true
done
|