[sf-perl] simultaneous processes?

Richard Reina gatorreina at gmail.com
Fri Mar 5 11:09:18 PST 2010


Hi Garth,

Thank you for he reply.  What I am trying to do is run two programs
simultaneously and pass an argument in the form of a scalar to one of the
programs.

Here's the code from the program ( I am retyping it as the machine it's on
does not get connected to the internet)

system(q{ ( evince /usr/local/docs/$file & ) ; gnome-terminal"});

evince opens with the error message:

Unhandled MIME type: "x-directory/normal"

However,

system(q{ ( evince /usr/local/docs/file_name.tif & ) ; gnome-terminal"});

works ( the file opens fine and so does the terminal next to it.)  I need to
find a way to be able to pass the file name to evince.

Thanks, again for the reply.  Hopefully, this can be solved.



2010/3/5 Garth Webb <garth.webb at gmail.com>

> I think I'm lost on what you're trying to do; if its not too lengthy, can
> you post exactly the script you're trying to run with the environment
> variables (e.g. $file) explicitly defined?
>
> If you're really doing a "perl -e" just to run system, you might consider
> making this a shell script instead of a perl script.
>
> Garth
>
> 2010/3/5 Richard Reina <gatorreina at gmail.com>
>
> The solution below works. But when I have to pass a scalar to the program
>> it does not.  For example if I do something like:
>>  perl -e'system(q{ ( evince $file & ) ; xlogo });'
>>
>> evince opens with this error Unhandled MIME type: "x-directory/normal"
>>
>> Does any one know how I can remedy this?
>>
>> Thanks.
>>
>> Richard
>>
>>
>>
>> 2010/3/4 Mark Grimes <mgrimes at cpan.org>
>>
>>> There are better ways of dealing with this (forking, one of the IPC
>>>
>>> modules, etc), but these are a quick and dirty way to do what you
>>> want:
>>>
>>>  perl -e'system(q{sh -c "( xlogo & ) ; xlogo "});'
>>>  perl -e'system(q{ ( xlogo & ) ; xlogo });'
>>>
>>> (Replacing the xlogo commands with evice and terminal, of course.)
>>>
>>>
>>> 2010/3/4 Richard Reina <gatorreina at gmail.com>:
>>> > I use evince to view a good number of tiff files.  I have written a
>>> quick
>>> > little script to help me associate the tiff files with various database
>>> > records.  This script runs as part of larger API that runs in a very
>>> minimal
>>> > xwindows system ( no desktop just twm as a window manager.) As it
>>> stands now
>>> > I view the file with system("evince file.tiff"); close evince and
>>> execute
>>> > the script which helps me associate and save the file.  I was wondering
>>> if
>>> > there is a way to for my script to open a terminal while evince is
>>> still
>>> > open so I can still look at the file while I'm saving it.
>>> >
>>> > I've tried system("evince file.tiff & gnome-teminal
>>> --geometry=50x35-0+0");
>>> > but then I don't see evince.
>>> >
>>> > Any help would be greatly appreciated.
>>> >
>>> > Thanks,
>>> >
>>> > Richard
>>> >
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>>> >
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>>
>>
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