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Full Discussion: Issues with grep -w
Top Forums Shell Programming and Scripting Issues with grep -w Post 302343204 by rdhanek on Wednesday 12th of August 2009 02:20:34 AM
Old 08-12-2009
Hi Panyam,

here is the code that i am using to grep for 5 hrs back data. As a part of it..if it goes to the else loop it is working fine. but the data is picked by grep if the code executes th efirst pasrt of teh code(i.e, if loop suuceeds)
p.s. In both the cases i am able to echo date format correctly. Not sure this may be a space issue.

Code:
#!/bin/bash
genexpression()
{
stime=`date '+ %H'`
if (( $stime < 5 ))
then
stime=`expr $stime \+ 19`
export express=\(`TZ=CST+24 date '+ %m/%d/%Y'`\ $stime
else
stime=`expr $stime \- 5`
if (( $stime < 10 ))
then
stime=0${stime}
fi
export express=`date '+%m/%d/%Y'`\ $stime
fi
}
genexpression
export express
echo $express
t=`grep -w "$express" Service.log | wc -l`

if [ $t -ne 0 ];then
echo "suces"
else
echo "fail"
fi

 

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LEARN ABOUT REDHAT

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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