Shell Programming and Scripting

Hi all u brilient people on the forum...
I am trying to call the variable value in awk command for search pattern /start/,/stop/ but i am nt able to do this ....
wat i did is ..i have created two variable YESTERDAY and TODAY and passed the y'day n 2'days dates in it...like this

Code:

YESTERDAY=`TZ=aaa24 date +"%b %d"`
TODAY=`date +"%b %d"`

now am trying call this variable value in awk command which will search the content of the file between Y'days and 2days date and redirect the output to another file ....As this

Code:

awk '/"$YESTERDAY {print}"/,/"$TODAY {print}"/' $HOME/alert_out.log > $HOME/alert_work.log

bt its not working.....
Can anybody help me out How can i acheive this??
Thanks in advance...

to avoid the troublesome quotes, use -v option of awk to pass in variables from the shell.

what is your pattern??
is it $YESTERDAY,$TODAY ?
you can directly use double quotes instead the single ones in the whole command.

10x...4 reply to my thread bt
How can i use -v option in awk for /start/,/stop/ search option...

Kanchan
Also my search pattern is the date which will retrieve by the variable which i was defined above....
It has to search the result based on the Yesterdays and todays date.

I was already tried to put in double qoute bt no luck...

Code:

a="pattern1"
awk -v var=$a '$0~var,/pattern2/' file

10x 4 reply...
bt still its not working..
I think u ddnt undersand my requirement.

Here i want to retrieve the value based on the YESTERDAYS Date and TODAYS date and my script will redirect the content of the file Between yesterdays date and todays date. The file on which i am taking the search is having the daily update mentioning the date format e.g say Apr 16 ,Apr 15,Apr 14 like that. so if i pass the value Apr 15 in place of YESTERDAY variable and Apr 16 for TODAYS then it has to give the content of the file between these two dates.

i am using awk command of search string '/START/,/STOP/' where START if 4 YESTERDAY and STOP 4 TODAY... and the syntax which awk command use for this kind of search is shown above in colored..
So here i have already defined the variable YESTERDAY and TODAY...
My problem is how to pass the value for both the variable.....

My code is some what like this

Code:

YESTERDAY=`TZ=aaa24 date +"%b %d"`
TODAY=`date +"%b %d"`
echo $TODAY
echo $YESTERDAY
awk '/"$YESTERDAY {print}"/,/"$TODAY {print}"/' $HOME/alert_out.log >> $HOME/alert_work.log
 
but here its not passing the value 4 both variables though its still creating the file $HOME/alert_work.log but with zeor content.

the syntax for your awk statement is wrong. I have already showed you how you can pass variables to awk from shell using an example.