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Top Forums Shell Programming and Scripting Sed replace using same pattern repeating multiple times in a line Post 302715971 by sol_nov on Monday 15th of October 2012 08:54:18 PM
Old 10-15-2012
Sorry for the typo:

I am trying to match the pattern
Quote:
/*<tagz>*/hello.
Quote:
/*<tag1>*/bye.
hello and bye are not same always, there can be anything in place hello and bye.

I am trying to remember the value and repalce it like below:
Quote:
/*<tagz>*/${tagz}.
---------- Post updated at 07:54 PM ---------- Previous update was at 07:51 PM ----------

Quote:
Originally Posted by agama
You're falling victim to the greedy match. Have a go with this:

Code:
echo "/*<tagz>*/${tagz}.unix some random text and /*<tag1>*/${tag}.unix" | sed -E 's!\*<([^>]*)>[^.]*\.!*<\1>*/${\1}.!g'

Only tried it on your sample and one other contrived example, so it might not be perfect. I also prefer using -E to avoid escaping parens which just make it messy. If you are using a BSD based sed it'll be a different (-r or -R, I cannot remember and my BSD box isn't up right now).
-E illegal option
 

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MB_EREGI_REPLACE(3)							 1						       MB_EREGI_REPLACE(3)

mb_eregi_replace - Replace regular expression with multibyte support ignoring case

SYNOPSIS
string mb_eregi_replace (string $pattern, string $replace, string $string, [string $option = "msri"]) DESCRIPTION
Scans $string for matches to $pattern, then replaces the matched text with $replacement. PARAMETERS
o $pattern - The regular expression pattern. Multibyte characters may be used. The case will be ignored. o $replace - The replacement text. o $string - The searched string. o $option -$option has the same meaning as in mb_ereg_replace(3). RETURN VALUES
The resultant string or FALSE on error. NOTES
Note The internal encoding or the character encoding specified by mb_regex_encoding(3) will be used as the character encoding for this function. Warning Never use the e modifier when working on untrusted input. No automatic escaping will happen (as known from preg_replace(3)). Not taking care of this will most likely create remote code execution vulnerabilities in your application. SEE ALSO
mb_regex_encoding(3), mb_ereg_replace(3). PHP Documentation Group MB_EREGI_REPLACE(3)
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