[SOLVED] sed syntax for deleting, I guess...

vynilas · 12-17-2018, 08:46 AM

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

pan64 · 12-17-2018, 11:33 AM

the original sed contains \r, your modified version contains \n as the last char (for example in line 1, line 2 ...)

vynilas · 12-18-2018, 03:14 AM

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

berndbausch · 12-18-2018, 03:42 AM

Quote:

Originally Posted by vynilas

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'

pan64 · 12-18-2018, 04:31 AM

Quote:

Originally Posted by vynilas

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.

vynilas · 12-18-2018, 07:24 AM

@ 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

pan64 · 12-18-2018, 07:33 AM

glad to help you. If you really want to say thanks just click on yes.