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Old 01-28-2005, 04:43 AM   #1
gmitra
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Registered: Jun 2002
Location: Slovak Republic
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BASH: How to change a line in file?


Hello,
I need a simple script which changes one line in input file. Concretely, I want to replace the
title of eps file. The file before:
Code:
.
.
.
%%Title: Original name of the eps file
.
.
.
and after
Code:
.
.
.
%%Title: My new name of the eps file
.
.
.
has to be processed.
Thanks.
 
Old 01-28-2005, 05:03 AM   #2
slakmagik
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sed 's/Original name of the eps file/My new name of the eps file/'

But somehow I suspect you're actually asking for more than that.
 
Old 01-28-2005, 05:47 AM   #3
gmitra
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Location: Slovak Republic
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Original Poster
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Yes, actually for more. If you know how to put to the sed for replacement
value of variable, then it could be done e.g.:
[code]
NEW_TITLE="This is my new title"
OLD_TITLE=$(grep "%%Title:" $FILE | cut -d: -f2)
sed 's/$OLD_TITLE/$NEW_TITLE/' $FILE > output.eps
[\code]
But it doesn't work!
 
Old 01-28-2005, 05:59 AM   #4
slakmagik
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Would double quotes and an address work?

OLD=foo
NEW=bar
sed "/%%Title/s/$OLD/$NEW/" $FILE > out

-- I mean, I gather this file has other lines in it you *don't* want to change? Still kind of confused about the objective and restrictions here. But that may do what you want.

Last edited by slakmagik; 01-28-2005 at 06:01 AM.
 
Old 01-28-2005, 07:26 AM   #5
jlliagre
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I suspect the sed solution can't work, as it choke on binary contents or very long lines which are likely to appear on an eps file.
 
  


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