myc-manage/bin/myc-check-and-launch-backup

#!/bin/bash

##
## Quick and dirty check launching backup
##

if ! cron_line=$(docker exec myc_cron_1 cat /etc/cron.d/rsync-backup | grep "\* \* \*"); then
    echo "can't find cron_line in cron container." >&2
    exit 1
fi

cron_line=${cron_line%|*}
cron_line=${cron_line%"2>&1"*}

cmd_line="${cron_line#*root}"

eval "args=($cmd_line)"

## should be last argument

docker_cmd=$(echo ${args[@]: -1})

if ! [[ "$docker_cmd" == "docker run --rm -e "* ]]; then
   echo "docker command found should start with 'docker run'." >&2
   echo "Here's command:" >&2
   echo "  $docker_cmd" >&2
   exit 1
fi

eval "docker exec -i myc_cron_1 $docker_cmd"