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Old 12-17-2018, 09:46 AM   #1
vynilas
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Registered: Jun 2018
Location: Nice France
Distribution: ubuntu
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sed syntax for deleting, I guess...


Hello !

one gave me a sed script file filter.sed which starts with the 3 following blocks :

Code:
/Setting env. variables.
*$/,/BUILD: .*
*$/d
/^WARNING: .* logout and login .*
*$/,/^=*
*$/d
/All Rights Reserved.
*$/,/See error log file for details.
*$/d
I run this script with : echo "hello" | sed -f filter.sed
If the sed script contains only those lines, sed call fails complaining :

sed: file p.sed line 1: unterminated address regex

If I provide the entire sed script (sed.txt attached to this message) , it works smoothly.

Googling to understand sed syntax couldn't provide me the explanation why those delete are splitted over 3 lines.

May I ask you some hints please ?

Cheers
Attached Files
File Type: txt sed.txt (5.6 KB, 11 views)

Last edited by vynilas; 12-17-2018 at 09:49 AM.
 
Old 12-17-2018, 12:33 PM   #2
pan64
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the original sed contains \r, your modified version contains \n as the last char (for example in line 1, line 2 ...)
 
Old 12-18-2018, 04:14 AM   #3
vynilas
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Dear Pan,
Thanks for your answer.
Unfortunately, there is no relation between this issue and the carriage return point.
Indeed, I had to copy paste from a linux guest host by a windows running virtual box, hence the \n in my forum message.
Cheers
Sylvain
 
Old 12-18-2018, 04:42 AM   #4
berndbausch
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Quote:
Originally Posted by vynilas View Post
Hello !

one gave me a sed script file filter.sed which starts with the 3 following blocks :

Code:
/Setting env. variables.
*$/,/BUILD: .*
*$/d
/^WARNING: .* logout and login .*
*$/,/^=*
*$/d
/All Rights Reserved.
*$/,/See error log file for details.
*$/d
A newline is the end of a command for sed, except if you put a backslash before it. Backslashes remove the special meaning of characters, and the newline becomes an ordinary character, not a line delimiter.

I tried it like this directly on the command line:
Code:
$ echo bla | sed '/Setting env. variables.\
*$/,/BUILD: .*\
*$/d'
bla
$ echo -e 'Setting env. variables,\n\n\n' | sed '/Setting env. variables.\
*$/,/BUILD: .*\
*$/d'

Last edited by berndbausch; 12-18-2018 at 04:46 AM.
 
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Old 12-18-2018, 05:31 AM   #5
pan64
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Quote:
Originally Posted by vynilas View Post
Dear Pan,
Thanks for your answer.
Unfortunately, there is no relation between this issue and the carriage return point.
Indeed, I had to copy paste from a linux guest host by a windows running virtual box, hence the \n in my forum message.
Cheers
Sylvain
If there are \n at the end of the lines it prints the error message (what you got).
If I replace \n to \r it will work.
 
Old 12-18-2018, 08:24 AM   #6
vynilas
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Registered: Jun 2018
Location: Nice France
Distribution: ubuntu
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@ Pan64 : Many thanks for this precision.
My mistake was to use visual code to edit the sed script file.... When I edit the sed script file with vi, I can see that the 3 first lines are actually one and only one line, each of its 3 chunks are separated by the special char ^M (CR), which is not the native linux carriage return. Furthermore, ^M is misinterpreted by sed.
Removing the ^M makes the job !

@berndbausch Thanks for the tips
 
Old 12-18-2018, 08:33 AM   #7
pan64
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glad to help you. If you really want to say thanks just click on yes.
 
1 members found this post helpful.
  


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