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Full Discussion: Run script through cron with user environment variables
Top Forums Shell Programming and Scripting Run script through cron with user environment variables Post 302880031 by gacanepa on Tuesday 17th of December 2013 08:00:58 AM
Old 12-17-2013
Run script through cron with user environment variables
Hi everyone,
I wrote a script that is supposed to be run by cron on a daily basis. It works just fine if I run it manually, but due to a lack of environment variables (which are available during my user session but not when cron runs the script) it keeps failing to run successfully.
Here's the complete scenario:
The run_lines.sh script executes the lines.sh script 6 times, each one with different parameters, like this:

run_lines.sh:
Code:
#!/bin/bash
/home/me/lines.sh 04 email1@mydomain.com
/home/me/lines.sh 05 email2@mydomain.com
/home/me/lines.sh 06 email3@mydomain.com

(Only 3 lines are shown above)
And here's the crontab entry:
Code:
15 08 * * * /home/me/run_lines.sh

Now here's what I'm thinking. I created a list of the environment variables that are available to my user session with:
Code:
env > env_user.log

Then I'm thinking about doing this in one of the scripts mentioned above (run_lines.sh or lines.sh):
Code:
while read line; do
export $line
done < env_user.log

That way when the script is run through cron, all the environment variables of my user session will be exported and made available to cron.
I also tried
Code:
15 08 * * * me /home/me/run_lines.sh

but my implementation of cron does not seem to allow that.
I've done it before but I'm not quite sure it's the most efficient way to go.
Any hints or ideas will be more than welcome.
Thanks in advance.
 

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LEARN ABOUT LINUX

service

service(8)						      System Manager's Manual							service(8)

NAME

       service - run a System V init script

SYNOPSIS

       service SCRIPT COMMAND [OPTIONS]

       service --status-all

       service --help | -h | --version

DESCRIPTION

       service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
       directory set to /.

       The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT.  The  supported  values  of  COMMAND  depend  on  the
       invoked	script,  service  passes  COMMAND and OPTIONS it to the init script unmodified.  All scripts should support at least the start and
       stop commands.  As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the  start
       command.

       service --status-all runs all init scripts, in alphabetical order, with the status command.

EXIT CODES

       service calls the init script and returns the status returned by it.

FILES

       /etc/init.d
	      The directory containing System V init scripts.

ENVIRONMENT

       LANG, TERM
	      The only environment variables passed to the init scripts.

SEE ALSO

       /etc/init.d/skeleton,
       update-rc.d(8),
       init(8),
       invoke-rc.d(8).

								     Jan 2006								service(8)
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