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sed search and replace

 
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# 1  
Old 04-26-2006
sed search and replace
Hello Folks,

Anyone know how I can replace this line in file.xml

<oacore_nprocs oa_var="s_oacore_nprocs">8</oacore_nprocs>

with this line

<oacore_nprocs oa_var="s_oacore_nprocs">1</oacore_nprocs>

using sed or awk ?

Thanks for your time.

Cheers,

Dave
# 2  
Old 04-26-2006
Code:
sed -e "s/\(<oacore_nprocs [^>]*>\)[^<]*\(<.*\)/\1SOME-TEXT-TO-GO-IN\2/g"

The sed expression could get simpler. But this one would take anything between the tags and replace it with SOME-TEXT-TO-GO-IN.
# 3  
Old 04-26-2006
Hi thanks for the reply.
I'm not sure I understand the command, I just need to replace the 8 with the 1 on that particular line in file.xml
Will this do that ? I cant see how it will.
Thanks
# 4  
Old 04-26-2006
Computer
as simple as this
sed -e 's/ptrn/newptrn/g' file
Smilie
# 5  
Old 04-26-2006
Quote:
Originally Posted by vino
Code:
sed -e "s/\(<oacore_nprocs [^>]*>\)[^<]*\(<.*\)/\1SOME-TEXT-TO-GO-IN\2/g"

The sed expression could get simpler. But this one would take anything between the tags and replace it with SOME-TEXT-TO-GO-IN.

Replace SOME-TEXT-TO-GO-IN with 1
# 6  
Old 04-26-2006
tried both suggestions, neither worked.

sed -e "your_command" file.xml

just cats the file and does nothing
# 7  
Old 04-26-2006
Quote:
Originally Posted by d__browne
tried both suggestions, neither worked.

sed -e "your_command" file.xml

just cats the file and does nothing
Ofcourse, it will not write to the xml file. You need to redirect it and then move it to the original.

Something like

Code:
sed -e "your_command" file.xml > file.xml.new
mv file.xml.new file.xml

 
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