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Full Discussion: grep function
Special Forums UNIX Desktop Questions & Answers grep function Post 302500732 by DGPickett on Tuesday 1st of March 2011 11:23:43 AM
Old 03-01-2011
For grep, the nicest test wrapper is the -q, as it is terse, grep can stop at the first hit and just exit 0 else exit 1 at eof, with no additional interpreting commands like -ge:
Code:
if ( dspmq | grep -q "as StandBy" )
then
 . . .
else
 . . .
fi

I guess even the () can be dropped, as they cost you a fork for a subshell, but I like some wrapper.
 

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LEARN ABOUT V7

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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