/lib/init/vars.sh is in sysvinit-utils 2.88dsf-59.10ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Set rcS vars
#
# Because /etc/default/rcS isn't a conffile, it's never updated
# automatically. So that an empty or outdated file missing newer
# options works correctly, set the default values here.
TMPTIME=0
SULOGIN=no
DELAYLOGIN=no
UTC=yes
VERBOSE=no
FSCKFIX=no
# Source conffile
if [ -f /etc/default/rcS ]; then
. /etc/default/rcS
fi
# Unset old unused options
unset EDITMOTD
unset RAMRUN
unset RAMLOCK
# Don't unset RAMSHM and RAMTMP for now.
# Parse kernel command line
if [ -r /proc/cmdline ]; then
for ARG in $(cat /proc/cmdline); do
case $ARG in
# check for bootoption 'noswap' and do not activate swap
# partitions/files when it is set.
noswap)
NOSWAP=yes
;;
# Accept the same 'quiet' option as the kernel, but only
# during boot and shutdown. Only use this rule when the
# variables set by init.d/rc is present.
quiet)
if [ "$RUNLEVEL" ] && [ "$PREVLEVEL" ] ; then
VERBOSE="no"
fi
;;
esac
done
fi
# But allow both rcS and the kernel options 'quiet' to be overrided
# when INIT_VERBOSE=yes is used as well.
if [ "$INIT_VERBOSE" ] ; then
VERBOSE="$INIT_VERBOSE"
fi
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