Re: [PLUG] sed question

["Greg Sabino Mullane" <greg@turnstep.com>]

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> the contents get wiped out...

As others have said, it's a shell issue. The problem is that 
sed is a stream editor and reads line by line (or rather, makes 
a single pass over the input). Therefore, it can't read from a 
file while it is writing it at the same time. The only way is to 
store it into memory or use a temp file. Here's a little bash 
script I came up with to allow you to 'inplace edit' commands 
that don't have that option (such as 'sort'):

#!/bin/bash --norc
HESED=${!#}
SHESED=`mktemp /tmp/$HESED.XXXXXX`
$@ > $SHESED
mv $SHESED $HESED

Name it 'inplace', throw it in your path, and you should be 
able to do the following:

inplace sed s/class=\"bodytext\"//g computing.php

> ...a shell-script solution was presented to allow this sort of 
> thing without having to make a temporary file either before or 
> after.

I don't quite see how it is possible to solve this without a 
temporary file, but would love to learn how if you can find 
the script.

Thanks,
Greg Sabino Mullane
greg@turnstep.com
PGP Key: 0x14964AC8 200111201537

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