gsed 4.1.5 cannot find ".+" in my file


 
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# 1  
Old 02-10-2009
gsed 4.1.5 cannot find ".+" in my file

Hi all

I have a file with a single record:

"ab"c",asb,"dfe 7"",bbv",12345,q17,"a field with a comma, here",1234.56

If I issue (will print if a match is found)

Code:
sed -n -e "s/.+/&/gp" myfile > myoutfile


myoutfile is always empty.

If I issue

Code:
[sed -n -e "s/.*/&/gp" myfile > myoutfile


myoutfile contains the contents of myfile


This tells me that I can find zero or more 'anything's, but not one or more 'anything's. Surely sed can find one or more 'anything's in my single record?

What gives?

TIA
JG
# 2  
Old 02-10-2009
what 'gives' is that some sed-s don't support the full-blown regex. For example Solaris' out-of-the-box 'sed' does not support '+'.
To get around this - 'mimic' ".+' with '..*'
# 3  
Old 02-10-2009
The -r parameter will allow GNU sed to use more complex expressions including modifiers like +.
 
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