09-09-2008
regular expression help
I have a question regarding pattern searching with grep.
I have read tutorials all over the place and pretty much understand how to search for patterns and recurring patterns. I, however, need to search for words which have non-repeating occurances.
My task is to parse a 'permissions' string, ie "ug=rx,o=rw" or "ugo=rwx"
Take the string 'ugo' or 'oug', I basicaly need "grep [ugo][ugo][ugo] but they cannot repeat.
Ie, [ugo]\{3\} but not allow string such as "uuu"
Thanks in advance
Last edited by Bob565656; 09-09-2008 at 01:33 PM..
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LEARN ABOUT OPENDARWIN
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 is used to invoke the grep on compress'ed or gzip'ed files. All options specified are passed directly to grep. If no file is speci-
fied, 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 zgrep is invoked as zegrep or zfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, zgrep uses
it as the grep program to be invoked. For example:
for sh: GREP=fgrep zgrep string files
for csh: (setenv GREP fgrep; zgrep string files)
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO
grep(1), egrep(1), fgrep(1), zdiff(1), zmore(1), znew(1), zforce(1), gzip(1), gzexe(1)
ZGREP(1)