Help with sed.

[bigscouse]

I am trying to use in sed in a bourne script. Running on SVR4.<br>
My code looks like this: -<br>
<br>
for AA in `cat migration.list` <br>
do <br>
cat $PROCDIR/$AA.in ¦ sed -e 's/ $AA/ $AA_tmp/g'<br>
-e 's/ii_data/slave_data/g' &gt; $AA.in1 <br>
done<br>
<br>
When I run it I get this message <br>
&quot;UX:sh (./migration.sh): ERROR: -e: Not found&quot; <p>Ged Jones<br><a href=mailto:gedejones@hotmail.com>gedejones@hotmail.com</a><br><a href= > </a><br>

 

[AndyBo]

I think you'll need to pipe the output from the sed into another sed. eg:<br>
<br>
for AA in `cat migration.list` <br>
do<br>
cat $PROCDIR/$AA.in ¦ sed -e 's/ $AA/ $AA_tmp/g' ¦ sed -e 's/ii_data/slave_data/g' &gt; $AA.in1 <br>
done<br>
<br>
AFAIK, sed doesn't take multiple '-e' options, and it's interpreting yours as being the name of a file it's going to try and parse...<br>
<br>
Hope this helps.

 

[bigscouse]

Thanks AndyBo, that worked.<br>

 

[bigscouse]

This is weird, I did get it work first time I tried, but now it is not working at all. It seems as if sed will not read the variable. If I run with sh -x then the screen diplays the variables as having been interpreted but no action is taken on the file. If I use the variable in string2 only, then the replacement works.However sed will not interpret the variale in string 1. Same thing happens with ed. <p>Ged Jones<br><a href=mailto:gedejones@hotmail.com>gedejones@hotmail.com</a><br><a href= > </a><br>

 

[AndyBo]

It's probably a regexp thing. Further contemplation reminds me that '$' is the end-of-line indicator in regexp, so sed is probably looking for _tmp at the end of a line, or something. Must have needed more coffee the day I replied <br>
<br>
Try changing:<br>
cat $PROCDIR/$AA.in ¦ sed -e 's/ $AA/ $AA_tmp/g' ¦ sed -e 's/ii_data/slave_data/g' &gt; $AA.in1<br>
<br>
to be<br>
<br>
cat $PROCDIR/$AA.in ¦ eval sed -e 's/${AA}/${AA}_tmp/g' ¦ sed -e 's/ii_data/slave_data/g' &gt; $AA.in1<br>
<br>
The eval will replace the $AA references with the actual value of $AA before running the 'sed' command.<br>
<br>
That should work a little better <br>
<br>
(Note: The {} brackets are necessary. Without them, eval will interpret $AA_tmp as being $AA_tmp, not as $AA with _tmp appended to whatever $AA is set to. So, without the brackets, assuming $AA contain ABCD, you'd end up with &quot;sed -e 's/ABCD//g'&quot;. Definitely *not* the desired result. <br>
<br>
Hope this helps a bit more.

 

[bigscouse]

I found the problem, my mistake.

 

[kaih]

Another thing that may work is to just use double quotes &quot; instead of apostrophes '. Apostrophes keep the shell from intrerpolating variables, but double quotes says to go ahead and interpolate the variables.<br>
<br>
eval works because it accepts the string as indicated by the apostrophe as a unit, then hands that unit off to a subshell to run. At that point there aren't any apostrophes, so the variable interpolates.

 

[bigscouse]

Just in case anybody gets a similar problem:<br>
This was a classic case of the old cut and paste syndrome. When I pasted the working text into another script it also placed spaces after the end marker so sed did not recognise the marker. <p>Ged Jones<br><a href=mailto:gedejones@hotmail.com>gedejones@hotmail.com</a><br><a href= > </a><br>