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Full Discussion: grep using variable
Top Forums Shell Programming and Scripting grep using variable Post 302552446 by alister on Saturday 3rd of September 2011 12:36:44 PM
Old 09-03-2011
Quote:
Originally Posted by arindamlive
TRY THIS
x=`grep -w "Hello World" data.out | wc -l`

if test $x -eq 0 ; then
echo "String not found"
else
echo "String found"
fi
You could save yourself a little work and rewrite that so the if-statement uses grep's exit status directly (assuming the count is not needed, of course):
Code:
if grep -qw "Hello World" data.out; then
    echo "String found"
else
    echo "String not found"
fi

Regards,
Alister
 

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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)
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