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Full Discussion: Error redirection question
Top Forums Shell Programming and Scripting Error redirection question Post 302555792 by calredd on Thursday 15th of September 2011 03:33:29 PM
Old 09-15-2011
Error redirection question
Hi gurus,
I have a question, need some of your inputs...

I have a command like this :
Code:
export LINE_COUNT=`wc -l test.dat | awk '{print $1}'`

echo $LINE_COUNT         --- > gives me 2 which is fine as the file has 2 lines.

This works fine if the file test.dat is present but in case test.dat is not present (I intentionally remove the file), I want to redirect only the error to a specified error file like say test.err. For that I tried to do the following:
Code:
export LINE_COUNT=`wc -l test.dat | awk '{print $1}'` 2> test.err

I still got the error as "wc: cannot open test.dat" at the command promprt and the file test.err was empty.


I also tried :
Code:
export LINE_COUNT=`wc -l test.dat | awk '{print $1}' 2> test.err`

and I still got the error as "wc: cannot open test.dat" at the command promprt and the file test.err was empty.


My intention is only to redirect the error part of my command to a specific file say test.err and not display at the command prompt.


Hope I was clear.
Thanks for your time,
Carl
Last edited by Scott; 09-15-2011 at 04:50 PM.. Reason: Added code tags
 

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LEARN ABOUT CENTOS

gtester

GTESTER(1)							   User Commands							GTESTER(1)

NAME

       gtester - test running utility

SYNOPSIS

       gtester [OPTION...] [testprogram]

DESCRIPTION

       gtester is a utility to run unit tests that have been written using the GLib test framework.

       When called with the -o option, gtester writes an XML report of the test results, which can be converted into HTML using the gtester-report
       utility.

OPTIONS

       -h, --help
	   print help and exit

       -v, --version
	   print version information and exit

       --g-fatal-warnings
	   make warnings fatal

       -k, --keep-going
	   continue running after tests failed

       -l
	   list paths of available test cases

       -m=MODE
	   run test cases in MODE, which can be one of:

	   perf
	       run performance tests

	   slow, thorough
	       run slow tests, or repeat non-deterministic tests more often

	   quick
	       do not run slow or performance tests, or do extra repeats of non-deterministic tests (default)

	   undefined
	       run test cases that deliberately provoke checks or assertion failures, if implemented (default)

	   no-undefined
	       do not run test cases that deliberately provoke checks or assertion failures

       -p=TESTPATH
	   only run test cases matching TESTPATH

       -s=TESTPATH
	   skip test cases matching TESTPATH

       --seed=SEEDSTRING
	   run all test cases with random number seed SEEDSTRING

       -o=LOGFILE
	   write the test log to LOGFILE

       -q, --quiet
	   suppress per test binary output

       --verbose
	   report success per testcase

SEE ALSO

       gtester-report(1)

GLib																	GTESTER(1)
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