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Full Discussion: General question about the relationship between KSH and sed/grep/awk etc
Top Forums Shell Programming and Scripting General question about the relationship between KSH and sed/grep/awk etc Post 302294717 by Corona688 on Thursday 5th of March 2009 05:41:07 PM
Old 03-05-2009
Many common shells are different extensions on old-fashioned sh, which didn't even have arrays, so basic can mean really, really basic, and prevents really radical modification of the syntax. Efficiency's often aided by making some common things built-in -- it wouldn't have a builtin awk or sed, but would have a built in echo, read, etc. Creative use of things like the field seperator can also be used to help deal with strings but it's not a general-purpose do-everything construct. Though BASH has regexes these days...
 

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LEARN ABOUT PHP

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)
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