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Full Discussion: multiple variables assignement (stdout/stderr outputs)
Top Forums UNIX for Dummies Questions & Answers multiple variables assignement (stdout/stderr outputs) Post 302447903 by anthalamus on Tuesday 24th of August 2010 03:59:37 PM
Old 08-24-2010
multiple variables assignement (stdout/stderr outputs)
Hi all,

I've been looking around for this for a while and can't seem to find a satifactory way to do what I want:

I would like to assign the output of stdout to a variable and that of stderr to another one, and this without using temporary files/named pipes. In other words be able to assign several variable at a time.

For instance:
Code:
touch a_file
STDOUT=$(ls not_a_file a_file) # but error message is lost unless redirected somewhere
ls: cannot access not_a_file: No such file or directory
echo $STDOUT
a_file

Is it even possible? problems with backticks (``) or $(...) is that it only assigns 1 variable at a time I believe. Anyone's got any idea?

I could do:

Code:
STDOUT=$(ls not_a_file a_file 2>&1)
echo $STDOUT
ls: cannot access not_a_file: No such file or directory a_file

and parse the output but is the order even guaranteed? even if it is, distinguishing the stderr part from the stdout one would be difficult...

Thanks!
Anthony
Last edited by anthalamus; 08-24-2010 at 05:53 PM..
 

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LEARN ABOUT DEBIAN

ompi-iof

OMPI-IOF(1)							     Open MPI							       OMPI-IOF(1)

NAME

       ompi-iof, orte-iof - Displays a copy of the output streams from a process.

       NOTE: ompi-iof, and orte-iof are exact synonyms for each other. Using any of the names will result in exactly identical behavior.

SYNOPSIS

       ompi-iof [ options ]

Options
       ompi-iof will display a copy of the indicated stdout, stderr, and/or stddiag streams from the designated process.

       -pid | --pid
		 The pid of the mpirun executing the process whose streams are to be copied

       -stdout | --stdout
		 Display a copy of the specified process' stdout. If no options are specified, this will act as the default

       -stderr | --stderr
		 Display a copy of the specified process' stderr.

       -stddiag | --stddiag
		 Display a copy of the specified process' stddiag.

       -rank | --rank
		 The rank of the process whose output is to be copied.

DESCRIPTION

       ompi-iof  displays  a copy of the indicated stdout, stderr, and/or stddiag streams from the designated process. At this time, a ctrl-C must
       be used to terminate the program.  The program will terminate cleanly, telling the associated mpirun to close the requested streams  before
       exiting.

SEE ALSO

       orterun(1)

1.4.5								   Feb 10, 2012 						       OMPI-IOF(1)
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