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Issues with grep -w

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# 1  
Old 08-12-2009
Issues with grep -w
I am trying to use grep -w something as shown below.
Code:
grep -w "$a" $LOG1

It is not giving me neither any error nor any data. I am facing the issue while i run this command inside a script. But i am getting the data if i run the above command outiside the script.
here $a=08/11/2009 21
i tried outisde something like this and is working.
grep -w "08/11/2009 21" $LOG1

Can someone help me with the grep -w inside the script?
# 2  
Old 08-12-2009
Try this

Code:
grep -w $a $LOG1

# 3  
Old 08-12-2009
Giving an error message as it is treating 21 as the file name.

---------- Post updated at 11:27 PM ---------- Previous update was at 11:18 PM ----------

It it is working fine in the script also if i input the data manually like as i shown below.
a='08/11/2009 21'
export a

But it is not working if i am use the script shown below for getting the value into variable $a. Even though i am able to echo $a correctly.

Code:
#!/bin/bash
genexpression()
{
stime=`date '+ %H'`
#stime=4;
if (( $stime < 5))
then
stime=`expr $stime \+ 19`
export express=`TZ=CST+24 date '+ %m/%d/%Y'`\ $stime
#stime=`expr $stime \- 5`
else
stime=`expr $stime \- 5`
if (( $stime < 10 ))
then
stime=0${stime}
fi
export express=`date '+%m/%d/%Y'`\ $stime
fi
}
genexpression
echo $express
a=$express
export a
echo $a
grep -w "$a" LOG.txt

Last edited by rdhanek; 08-12-2009 at 12:54 AM..
# 4  
Old 08-12-2009
While using only the last part from your script, works fine for me.

Code:
a='08/11/2009 21'
echo $a
grep -w "$a" t1


Kindly make the above as the new script, and check what is the behavior, and report it here.

And why are you doing all the above thing ?? [ that is manipulating with the date command, and finally not using it !! ]

Kindly make the issues very clear, by pasting the output also.
# 5  
Old 08-12-2009
I am sorry for the confusion. That line a=08/11/2009 21' should be replaced with a=$express.I will update my post also accordingly.
And i am using the total script to get 5 hrs back data. And the date format in the file is something like this
08/11/2009 09:00:00

---------- Post updated 08-12-09 at 01:37 AM ---------- Previous update was 08-11-09 at 11:52 PM ----------

If it goes to the else condition The above code is working fine. Seems to be an issues with white apces in if part of the code.
# 6  
Old 08-12-2009
Hi rdhanek,

The same script what you have posted working perfectly for me.
Last edited by panyam; 08-12-2009 at 03:14 AM..
# 7  
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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