using a another delimiter with sed? Post: 302510300

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Top Forums Shell Programming and Scripting using a another delimiter with sed? Post 302510300 by alister on Saturday 2nd of April 2011 09:44:42 PM

04-02-2011

Registered User

Quote:

Originally Posted by ahamed101

Code:

result=`sed -n -e "!^$line$!{x;p;q;};h" services.txt`

Quote:

Originally Posted by MastaG

Well I tried to use another delimiter but it seems to be unsupported.
The / works:

Code:

sed -n -e "/^Nederland 1$/{x;p;q;};h" services 
1f44:ffff0000:0008:01f4:1:331

However using ! will not:

Code:

sed -n -e "!^Nederland 1$!{x;p;q;};h" services
sed: Unsupported command ^

The sed program comes with busybox, maybe it differs from gnu-sed in a way that it doesn't support other delimiters?

That's not how alternative delimiters work for addresses. You must precede the opening delimiter with a backslash.

Code:

sed -n '\!reg_ex_here!p'

As opposed to its usage in a substitution command which does not use the preceding backslash at the beginning:

Code:

sed -n 's!reg_ex_here!&!p'

Also, you may want to keep in mind that the exclamation point introduces history expansion in some shells, even when in double quotes.

Regards,
Alister

Last edited by alister; 04-02-2011 at 10:57 PM..

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