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Re: Running IDL from cron [message #23826]

Fri, 23 February 2001 15:53

thompson
Messages: 584
Registered: August 1991

Senior Member

Vapuser <vapuser@catspaw.jpl.nasa.gov> writes:

> Cron uses a crippled environment in the Bourne shell, it defines
> only a limited number of environmental variables.

I've been able to use a fully functional C shell in my cron jobs, by the simple
expedient of explicitly telling it what shell to run. This is done by putting

#!/bin/csh

as the first line of the script. For example, the extremely simple script

#!/bin/csh
printenv

when run as a cron job, demonstrates that my .cshrc file is being automatically
executed. On the other hand, my .login file is not. To do that, I would have
to use

#!/bin/csh
source .login
printenv

which works, although I do get a "not a terminal" error. For myself, it's not
necessary to run .login--all setup is done in .cshrc.

A valid C-shell script to run IDL would be

#!/bin/csh
idl << done
print,'Hello world'
done

I do have a cron job which uses IDL in just this fashion, which nightly creates
some images for a web page. As somebody has already pointed out before me, the
way to do this in a cron job is to use the Z buffer.

William Thompson

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[Message index]

		Re: Running IDL from cron By: thompson on Fri, 23 February 2001 15:53
		Re: Running IDL from cron By: davidf on Fri, 23 February 2001 15:14
		Re: Running IDL from cron By: Vapuser on Fri, 23 February 2001 13:06
		Re: Running IDL from cron By: Martin Schultz on Fri, 23 February 2001 04:21
		Re: Running IDL from cron By: R.Bauer on Thu, 22 February 2001 23:34
		Re: Running IDL from cron By: Liam E. Gumley on Thu, 22 February 2001 11:57
		Re: Running IDL from cron By: thompson on Thu, 22 February 2001 11:48
		Re: Running IDL from cron By: Craig Markwardt on Thu, 22 February 2001 10:44
		Re: Running IDL from cron By: Kenneth Mankoff on Thu, 22 February 2001 09:31
		Re: Running IDL from cron By: Ben Tupper on Mon, 26 February 2001 15:52

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