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Full Discussion: Error output of cat to /dev/null
Top Forums Shell Programming and Scripting Error output of cat to /dev/null Post 302493900 by Nils88 on Friday 4th of February 2011 06:03:49 AM
Old 02-04-2011
Error output of cat to /dev/null
Hello,

I'm trying to send the error output of a 'cat' operation to /dev/null like this:

Code:
cat /dirA/dirB/temp*.log  > /dirA/dirB/final.log 2>/dev/null

This works perfectly in a terminal, but not when placed in a script.

If there are no files matching temp*.log the script outputs an error saying: /dirA/dirB/final.log: No such file or directory.

The same problem occurs on the next line in the script where I want to remove all temp*.log files
Code:
rm /dirA/dirB/temp*.log 2>/dev/null


Sending all errors of the script to /dev/null is not an option as I need error information from other parts of the script.

Anybody an idea as to how to solve this
 

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LEARN ABOUT DEBIAN

bf_tar

BF_TAR(1)						    Bogofilter Reference Manual 						 BF_TAR(1)

NAME

       bf_tar - shell script to write a tar file of a bogofilter directory to stdout

SYNOPSIS

       bf_tar [-r] [-R] bogofilter_directory

DESCRIPTION

       bf_tar bundles a bogofilter working directory in tar format and copies it to standard output (your console, or where you redirect it, see
       EXAMPLES below).

OPTIONS

       The -r option causes bf_tar to remove inactive log files after the archive has been written successfully. The default is to leave log
       files.

       The -R option causes bf_tar to remove inactive log files before the archive is written. This may reduce chances that the resulting archive
       is recoverable should it become damaged. The archive may be smaller though. The default is to leave log files.

EXIT STATUS

       The script exits with status code 0 if everything went well, and nonzero if it encountered trouble.

EXAMPLES

       o   bf_tar ~/.bogofilter > outfile.tar

	   Writes a standard .tar file containing the essential files from ~/.bogofilter to outfile.tar.

       o   bf_tar ~/.bogofilter | gzip -9 -c > outfile.tar.gz

	   Writes a gzipped .tar.gz file containing the essential files from ~/.bogofilter to outfile.tar.gz.

       o   bf_tar `pwd`/mydirectory > outfile.tar

	   Prepend $(pwd)/ or `pwd`/ if you want to specify an absolute path instead of a relative path.

NOTES

       This script is meant for use with Berkeley DB based bogofilter versions.

       This script requires a SUSv2 compliant pax utility.

       This script expects a SUSv2 compliant shell. Solaris systems should have the SUNWxcu4 package installed (when bogofilter is configured) so
       that /usr/xpg4/bin/sh can be used.

AUTHORS

       Matthias Andree

Bogofilter							    03/15/2010								 BF_TAR(1)
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