delay variable expansion

Shell Programming and Scripting
1

Hi forum,

in my bash script I've many lines executing commands with redirection to log files.

...
xyz_cmd   2>&1  > $BASENAME.$LINENO

The trailing part of these lines doesn't look nice and I like to put it into a variable.
The (not working) idea is something like that

REDIRECT='2>&1  > $BASENAME.$LINENO'
...
xyz_cmd  $REDIRECT

thanks for suggestions

2

You could try something like the following

#!/bin/bash

function logAction {
        COMMAND=$1
        LOGFILE=$2
        if [ "x$LOGFILE" == "x" ] ; then
                LOGFILE=myLog.log
        fi
        $COMMAND 2>&1 >> $LOGFILE
}

logAction ls fileList.log

Rather than substituting the redirect, write a logging function

3

Another way :

eval xyz_cmd  $REDIRECT
4

Thanks to both of you.

In both solutions I've to pipe in the $LINENO at the calling point.
I want to avoid that.