Unexpected results with lists in GNU sed Post: 302607839

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Top Forums Shell Programming and Scripting Unexpected results with lists in GNU sed Post 302607839 by nctrader on Thursday 15th of March 2012 12:29:27 PM

03-15-2012

Registered User

Quote:

Originally Posted by Corona688

1) 2) grep does not use / / as regular expression beginning and end markers; your grep expression couldn't possibly have worked.

So, unless your version of sed is extremely strange, I think you've simplified the problem a little too far, reducing it into something which doesn't actually demonstrate your problem. Could you post the actual expression you're having problems with please?

Corona, sorry I got careless cutting and pasting, the grep command was

Code:

grep "[a-z]" temp2.txt

I just tried it again and the result was correct.

The sed example in the post is an example of an expression that exhibits the problem on my system (apparently not others'). I verified that also.

Here is something that is easier to cut and paste to the command line.

Code:

echo abAB | sed -r "s/[a-z]/x/g"

The result is xxxx on my machine. Not the expected xxAB.

Perhaps I do have a strange version of sed. One thought is whether it could be that the regex library not correct for the sed version. I don't know if that is the case or how to check.

Scrutinizer, Yes it works with classes, but that doesn't solve the problem.

nctrader

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zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)