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# 1  
Old 06-21-2010
bash
Hi All,
I have a question about shell script
I have a file named a.txt
Code:
#a.txt
RBS155_SITE1
	IP=10.42.33.3
	OptBootF="/WRAN/smrsslave1/AIF/Site1RBS155/summaryFile.xml"
	
RBS15_SITE1
	IP=10.42.33.2
	OptBootF="summaryFile.xml"
	

eRBS15_SITE1
	IP=192.168.1.2
	OptBootF="summaryFile.xml"
	NTPservs=10.42.52.99
	UTCoffst=23005253

Now I want to write a function who has two parameters
Code:
#para1: target file for example a.txt
#para2: target for example RBS15_SITE1
#return: 1: find target in the file  0: doesn't find the target in the  #file
find_client(){
        res=`exec awk '/'"$1"'/ {print $1 }' a.txt |cat`
	if [ $res = $2 ]; then 
		return 1
	else
		return 0
	fi
}

the problem is when I invoke the function as follows
Code:
find_client a.txt RBS15_SITE1

I find the value of res is
Code:
RBS15_SITE1 eRBS15_SITE1

the expected value of the res is RBS15_SITE1

I want to search file for the particular word.

How can I modify the function?Or can you give me a new solution


Thanks and BRs
Damon
Last edited by Scott; 06-21-2010 at 02:34 PM.. Reason: Please use code tags
# 2  
Old 06-21-2010
Code:
find_client() {
        grep -w $2 $1
        res=$?
	if [ $res -eq 0 ]; then 
		return 1
	else
		return 0
	fi
}

btw, In your awk statement, your are searching for the patter $1 !! which is the filename. the pattern is $2.
second, awk statement is not efficient.

If you do want to use that statement, use boundaries. ( surround the pattern with ^..$ )
# 3  
Old 06-21-2010
Code:
$
$
$ cat a.txt
#a.txt
RBS155_SITE1
        IP=10.42.33.3
        OptBootF="/WRAN/smrsslave1/AIF/Site1RBS155/summaryFile.xml"
RBS15_SITE1
        IP=10.42.33.2
        OptBootF="summaryFile.xml"

eRBS15_SITE1
        IP=192.168.1.2
        OptBootF="summaryFile.xml"
        NTPservs=10.42.52.99
        UTCoffst=23005253
$
$
$ cat -n searchprint.sh
     1  #!/usr/bin/bash
     2  find_client(){
     3    res=`awk /^$2$/ $1`
     4    echo "res = $res"
     5    if [ $res = $2 ] ; then
     6      echo "Found a match of $2 in $1, res = $res"
     7    else
     8      echo "Could not find a match, sorry"
     9    fi
    10  }
    11  find_client a.txt RBS15_SITE1
$
$
$ . searchprint.sh
res = RBS15_SITE1
Found a match of RBS15_SITE1 in a.txt, res = RBS15_SITE1
$
$

tyler_durden
# 4  
Old 06-21-2010
Thanks for you help.
I think I know how to deal with it .
# 5  
Old 06-21-2010
Quote:
Originally Posted by anchal_khare
Code:
find_client() {
        grep -w $2 $1
        res=$?
	if [ $res -eq 0 ]; then 
		return 1
	else
		return 0
	fi
}

btw, In your awk statement, your are searching for the patter $1 !! which is the filename. the pattern is $2.
second, awk statement is not efficient.

If you do want to use that statement, use boundaries. ( surround the pattern with ^..$ )

Question,

I've seen several people set the exit value of an event as a variable. Is there a reason for this, or is it just for readability?

I mean what's wrong with

Code:
$<command that will fail>
  if [[ $? -eq 1 ]];then
    echo "Oh no, call the police"
  else
    echo "light the fires and kick the tires, we did it"
  fi
Oh no, call the police
$

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