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Full Discussion: Regular Expression question
Top Forums UNIX for Dummies Questions & Answers Regular Expression question Post 302195236 by era on Wednesday 14th of May 2008 03:12:16 PM
Old 05-14-2008
grep normally returns the entire matching line anyway.

The regular expression should work with grep as such, if you make a few minor substitutions. \d is a Perlism, replace with [0-9]. {4} is an egrep-ism, although POSIX grep has it in some form, too (maybe with backslashes before the braces); or you can simply put the required number of repetitions.

You will be hard pressed to find a situation where you can get exactly only the required parts out of grep, though. [0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9] and [^/]*$ will still work, but the penultimate directory I don't think you can get without passing through sed or some such.
 

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LEARN ABOUT DEBIAN

xzgrep

XZGREP(1)							     XZ Utils								 XZGREP(1)

NAME

       xzgrep - search compressed files for a regular expression

SYNOPSIS

       xzgrep [grep_options] [-e] pattern file...
       xzegrep ...
       xzfgrep ...
       lzgrep ...
       lzegrep ...
       lzfgrep ...

DESCRIPTION

       xzgrep  invokes	grep(1)  on  files which may be either uncompressed or compressed with xz(1), lzma(1), gzip(1), bzip2(1), or lzop(1).  All
       options specified are passed directly to grep(1).

       If no file is specified, then standard input is decompressed if necessary and fed to grep(1).  When reading from standard  input,  gzip(1),
       bzip2(1), and lzop(1) compressed files are not supported.

       If  xzgrep  is  invoked as xzegrep or xzfgrep then egrep(1) or fgrep(1) is used instead of grep(1).  The same applies to names lzgrep, lze-
       grep, and lzfgrep, which are provided for backward compatibility with LZMA Utils.

ENVIRONMENT

       GREP   If the GREP environment variable is set, xzgrep uses it instead of grep(1), egrep(1), or fgrep(1).

SEE ALSO

       grep(1), xz(1), gzip(1), bzip2(1), lzop(1), zgrep(1)

Tukaani 							    2011-03-19								 XZGREP(1)
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