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Full Discussion: standard error to standard out question
Top Forums Shell Programming and Scripting standard error to standard out question Post 302318778 by hcclnoodles on Friday 22nd of May 2009 08:31:19 AM
Old 05-22-2009
Quote:
Originally Posted by pludi
You're setting up redirection for that command, while the message is sent by the shell. You can either redirect that too by using exec, or you can do it the smart way:
Code:
if [ -x /path/to/zfs ]
then
    zfs list | grep ...
    ...
else
    # Whatever to be done if zfs isn't there
fi

By the way, grep knows the -q switch, which only sets $? based on whether the term is found or not, and produces no additional output.


Ok thanks, if I were to put that 'if' statement in there it would mean a bit of a change to the script so im particularly interested in the 'exec' method you mention.... ive tried

Code:
# exec zfs list | grep $HOME$ > /dev/null 2>&1
bash: exec: zfs: not found

but as you can see i still get the message, is this what you mean ??
 

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LEARN ABOUT DEBIAN

amanda-applications

AMANDA-APPLICATIONS(7)						    Miscellanea 					    AMANDA-APPLICATIONS(7)

NAME

       amanda-applications - Application-api for amanda

DESCRIPTION

       Describe how to use application with Amanda

APPLICATIONS

       This section lists the applications included with Amanda. See the individual man pages for instructions on using them. For complete How-To
       information, consult the Amanda wiki at http://wiki.zmanda.com.

       o   amgtar(8), - use GNU Tar to backup and restore data.

       o   ampgsql(8), - use PostgreSQL's continuous WAL archiving.

       o   amraw(8), - use open and read to read the data.

       o   amsamba(8), - use smbclient to backup and restore data.

       o   amstar(8), - use star to backup and restore data.

       o   amsuntar(8), - use native tar on Solaris to backup and restore data.

       o   amzfs-sendrecv(8), - use zfs to create a snapshot and use 'zfs send' to generate the backup.

       o   amzfs-snapshot(8), - use zfs to create a snapshot and for use with other applications (e.g. amgtar)

DEFINING APPLICATIONS

       An application is defined in amanda.conf(5) as follows:

       define application-tool $appconfigname {
	  plugin "$pluginname"
	  property "$PROPERTY_NAME" "$PROPERTY_VALUE"
	  ...
       }
       and then referenced in a dumptype as

       define dumptype $dumptypename {
	  ...
	  program "APPLICATION"
	  application "$appconfigname"
       }

       Application properties, like Amanda configuration parameters, are insensitive to case, and - (dash) and _ (underscore) may be used
       interchangeably.

       See the individual plugin documentation for properties applicable to each plugin.

SEE ALSO

       amanda(8), amanda.conf(5)

       The Amanda Wiki: : http://wiki.zmanda.com/

AUTHORS

       Jean-Louis Martineau <martineau@zmanda.com>
	   Zmanda, Inc. (http://www.zmanda.com)

       Dustin J. Mitchell <dustin@zmanda.com>
	   Zmanda, Inc. (http://www.zmanda.com)

Amanda 3.3.1							    02/21/2012						    AMANDA-APPLICATIONS(7)
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