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Re: Passing Batch File Names [message #62365 is a reply to message #62281]

Wed, 03 September 2008 12:18

Trae
Messages: 23
Registered: May 2007

Junior Member

> Your solution is very handy, but one should point out that blind execution of commands
> read from a file is potentially dangerous. It's probably not that big of an issue for IDL,
> but some of those batch file lines could be something like,

Oh yeah. I would never do this in perl or anything that had write
permissions in critical areas. The batch files made would be few in
number and only made a handful of people.

Still, it just became easier to change the structure of the previously
written codes then to deal with all of the issues, this being a big
one, that came about by trying to use batch files.

Good comment.

-Trae

On Sep 2, 2:16 pm, Paul van Delst <Paul.vanDe...@noaa.gov> wrote:
> Trae wrote:
>> Just in case another poor soul needs this and searches the group, here
>> are the lines of code that made it work. NB: EXECUTE only accepts
>> scalars as an input. Bogus.
>
> Your solution is very handy, but one should point out that blind execution of commands
> read from a file is potentially dangerous. It's probably not that big of an issue for IDL,
> but some of those batch file lines could be something like,
>
> stuff = file_search('*')
> for i=0,n_elements(stuff)-1 do file_delete, stuff[i], /quiet,/recursive
>
> Keep those batch files protected from disgruntled employees. :o)
>
> Using exec capabilities blindly is generally discouraged in scripting languages.
>
> cheers,
>
> paulv
>
>
>
>> First define a batch file named batch_test.pro with the commands
>
>> a=5
>> b=6
>> c=sin(!dpi/4.)
>
>> Now here are the commands to read and execute it.
>
>> file='batch_test.pro'
>
>> openr, lun, file, /GET_LUN
>> var_arr=''
>> ;while not eof do begin
>
>> WHILE ~ EOF(lun) DO BEGIN
>> line=''
>> READF,lun , line
>> var_arr=[var_arr,line]
>> ENDWHILE
>> FREE_LUN, lun
>> var_arr=var_arr[1:*]
>
>> for i=0ul,n_elements( var_arr) -1ul do result=execute(var_arr[i])
>
>> END
>
>> So you can define the variable 'file' anyway you want and it can have
>> as many or as few commands as you need.
>
>> Thanks for the help everyone!
>
>> I'm off to be quite pleased with myself for awhile! :)
>
>> Cheers,
>> -Trae

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[Message index]

		Re: Passing Batch File Names By: Trae on Tue, 02 September 2008 19:35
		Re: Passing Batch File Names By: Jean H. on Tue, 02 September 2008 13:33
		Re: Passing Batch File Names By: Michael Galloy on Tue, 02 September 2008 13:32
		Re: Passing Batch File Names By: Bob[3] on Tue, 02 September 2008 13:20
		Re: Passing Batch File Names By: Paul Van Delst[1] on Tue, 02 September 2008 11:16
		Re: Passing Batch File Names By: Brian Larsen on Tue, 02 September 2008 11:15
		Re: Passing Batch File Names By: Jean H. on Tue, 02 September 2008 10:34
		Re: Passing Batch File Names By: Trae on Tue, 02 September 2008 10:15
		Re: Passing Batch File Names By: pgrigis on Tue, 02 September 2008 09:57
		Re: Passing Batch File Names By: Trae on Tue, 02 September 2008 09:50
		Re: Passing Batch File Names By: Trae on Tue, 02 September 2008 09:27
		Re: Passing Batch File Names By: Brian Larsen on Tue, 02 September 2008 09:14
		Re: Passing Batch File Names By: pgrigis on Tue, 02 September 2008 09:03
		Re: Passing Batch File Names By: Trae on Tue, 02 September 2008 09:03
		Re: Passing Batch File Names By: Michael Galloy on Tue, 02 September 2008 08:54
		Re: Passing Batch File Names By: Trae on Wed, 03 September 2008 12:18

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