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sed - issue in replacing >

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# 1  
Old 03-07-2015
sed - issue in replacing >
Hi Gurus,

I am having trouble in replacing > symbol in a text line . I have number of special characters in this line like /,\,> and " etc.
the line looks something like
Code:
<ATTRIBUTE NAME ="Output file directory" VALUE ="/abc/khi/"/>

. I need to change this path, so I was trying to replace everything between VALUE = AND >
But as there are special characters here , I thought of first replacing them all. could successfully alter /,\ and " , but when trying to replace > , the sed doesn't returns anything. I am using
Code:
sed -e '/.Output file directory/s/\>/~/g'

.
can somebody please point out the error.
thanks in advance.
Last edited by Scrutinizer; 03-07-2015 at 07:08 AM.. Reason: CODE tags
# 2  
Old 03-07-2015
Like so?
Code:
$ echo '<ATTRIBUTE NAME ="Output file directory" VALUE ="/abc/khi/"/>' | sed 's/VALUE =[^>]*>/new text/'
<ATTRIBUTE NAME ="Output file directory" new text

This User Gave Thanks to Scrutinizer For This Post:
ajmani
# 3  
Old 03-07-2015
Thanks for your prompt response , but I am a newbie to Unix and just trying to learn and understand the code. your code helps but doesn't gives desired output.it gives ,
Code:
<ATTRIBUTE NAME ="Output file directory" $PMTargetFilePath

, but my requirement is to find the line containing output file directory and change it to
Code:
<ATTRIBUTE NAME ="Output file directory" VALUE ="$PMTargetFilePath"/>

refrencing your code , I tried
Code:
sed 's/VALUE=[^>]*>/value = \"$outputfilepath\"\/\>' <inputfile> outputfile

, but this is giving an error . Please help...
Thanks a lot.
Last edited by Don Cragun; 03-08-2015 at 01:56 AM.. Reason: Add CODE tags.
# 4  
Old 03-07-2015
Try:
Code:
$ PMTargetFilePath=/foo/bar
$ echo '<ATTRIBUTE NAME ="Output file directory" VALUE ="/abc/khi/"/>' | sed 's|VALUE =[^>]*>'"|value = $PMTargetFilePath|"
<ATTRIBUTE NAME ="Output file directory" value = /foo/bar

Here, instead of the standard forward slash (/) a vertical pipe (|) has been used to delimit the RE and the replacement part:

Quote:
Substitute the replacement string for the first instance of the regular expression in the pattern space. Any char-
acter other than backslash or newline can be used instead of a slash to delimit the RE and the replacement. Within
the RE and the replacement, the RE delimiter itself can be used as a literal character if it is preceded by a back-
slash.
This User Gave Thanks to Scrutinizer For This Post:
ajmani
# 5  
Old 03-07-2015
I referenced the code , that you have provided and with slight modifications I could advance a little more towards the desired output , however right now its replacing the filepath in all lines that contain "VALUE", though I want the path changed only for output files, i tried
Code:
sed -e '/.Output file directory /s/VALUE =[^>]*>'"/value = \"\$PMRootDir\\\data\\\output\\\\\"/>/g" <sampledataoncemore> result2

but this throws sed command garbled error and if i modify the code to use | delimiter
Code:
sed -e'|Output|s|VALUE =[^>]*>'"/value = \"\$PMRootDir\\\data\\\output\\\\\"/>|g" <sampledataoncemore> result2

I get
Code:
Unrecognized command: |Output|s|VALUE =[^>]*>/value = "$PMRootDir\\data\\output\\"/>|g

Request you to look into this and advice.
thanks again.
Moderator's Comments:
Mod Comment Please use CODE tags for sample input, output, and code.
Last edited by Don Cragun; 03-08-2015 at 03:00 AM.. Reason: Add more CODE tags.
# 6  
Old 03-07-2015
That was a bit too much - you can replace delimiters in s(ubstitute) commands, but not in addresses, so /output/ needs to stay /output/!
This User Gave Thanks to RudiC For This Post:
ajmani
# 7  
Old 03-07-2015
Thanks for looking into this , I used backslash as delimiter I first piece of code but as it was throwing error I tried using a pipe delimiter. I am really not sure where have I altered the slash in path . Could you please point it out .
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