B.4 EASYCRON - Adding To Crontab While Booting

Important: The following statements are intended only for developers of opt-packages for fli4l routers.

As of version 2.1.7 Easycron's rc-script provides the function add_crontab_entry(). Other rc-scripts starting from rc101 to rc949 can add entries to crontab by calling this function. These additional entries get activated with the start of the cron daemon at the end of booting.

add_crontab_entry time command [custom]

Use time to set the execution time in cron notation (see manpage crontab(5) at http://linux.die.net/man/5/crontab). command contains the command to be executed. The third parameter custom is optional. By using it you can set environment variables needed for the command used. If more than one variable has to be set separate them by a \\.

Please do not change the environment variable PATH because otherwise the following crontab entries could not be executed correctly anymore.

#
# example I: normal use, 2 parameters
#
     crontime="0 5 1 * *"
     croncmd="rotate_i_log.sh"

     add_crontab_entry "$crontime" "$croncmd"

#
# end of example I
#

#
# example II: extended use, 3 parameters and 
#                             multiple environment values 
#
     croncustom="source=/var/log/current \\ dest=/mnt/data/log"
     croncmd='cp $source $dest-`date +\%Y\%m\%d`; > $source'
     crontime="59 23 * * *"

     add_crontab_entry "$crontime" "$croncmd" "$croncustom"

#
# end of example II
#

The accuracy of the entries must be ensured by the calling script.