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#!/bin/bash
#################################################
## ##
## Basic usage of `at` to create a file and ##
## also take in account the queue, using atq. ##
## ##
## Written by: ##
## Utkarsh Gupta <utkarsh.gupta@canonical.com> ##
## License: GPL-2+ ##
## ##
#################################################
set -ex
TMPFILE=at.$RANDOM
WORKDIR=$(mktemp -d)
trap "rm -rf $WORKDIR" 0 INT QUIT ABRT PIPE TERM
JOBS_BEFORE=$(atq | wc -l)
# use at command to schedule a job.
echo "echo `date` > ${WORKDIR}/${TMPFILE}" | at now + 1 minute
sleep 2
# check if the file is created at the wrong
# time, that is, 58 seconds earlier.
if test -f "$TMPFILE"
then
echo "$TMPFILE already exits but it really shouldn't."
exit 1
else
echo "OK, $TMPFILE doesn't exist yet; expected.."
fi
# check atq to see the queued jobs.
# there should be a one new job.
JOBS_AFTER=$(atq | wc -l)
if [[ $((JOBS_AFTER - JOBS_BEFORE)) -eq 1 ]]
then
echo "OK, 1 new queued job exists.."
else
echo "No new queued job found."
exit 1
fi
sleep 60
# grep the content of the file to verify that
# everything is in order.
if grep -Fq "UTC" $WORKDIR/$TMPFILE
then
echo "OK, $TMPFILE exists and everything looks in order.."
else
echo "Either $TMPFILE doesn't exist or the content differs."
exit 1
fi
echo "OK; PASS."
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