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perl - replace value

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# 1  
Old 06-23-2011
perl - replace value
Hello,

I am trying to change a value in a param file, with the Run time variable in .sh scripts
using perl command ,

==========================================
Param file
Code:
[Global]
$$ID=<0>
$$Country=<Country>

==========================================
in the .sh script
Code:
val=33

I am trying 2 ways :
Code:
perl -pi -e 's/\$\$$ID=<>/\$\$$ID=<$val>/'

Or
Code:
perl -pi -e 's/$$ID=<>/$$ID=<$val>/g'

both way I am not able to change with the runtime value
it returns with no value in the result file
$$ID=<>
$$Country=<Country>

can someone please tell me what's wrong
Do I need to look at SED or AWK ?
Please Advice.

Thx.
-
Last edited by pludi; 06-23-2011 at 05:40 PM..
# 2  
Old 06-23-2011
Try:
Code:
perl -psi -e 's/\$\$ID=<.*>/\$\$ID=<$val>/' -- -val=33 file

# 3  
Old 06-23-2011
I could not see any change in the replace value

Thx
-
# 4  
Old 06-23-2011
Weird. It is working for me on the sample that you provided:
Code:
[root@linux ~]# cat file
[Global]
$$ID=<0>
$$Country=<Country>
[root@linux ~]# perl -psi -e 's/\$\$ID=<.*>/\$\$ID=<$val>/' -- -val=33 file
[root@linux ~]# cat file
[Global]
$$ID=<33>
$$Country=<Country>

# 5  
Old 06-23-2011
Code:
$
$ # check the file "f6" before making the change
$ cat f6
Param file
[Global]
$$ID=<0>
$$Country=<Country>
$
$ # set and export a shell variable called "VAL"
$ VAL=33
$ export VAL
$
$ # run the Perl one-liner to plug in the value of "VAL"
$ perl -pi -e "s/^(..ID=<).*?(>)/\${1}$VAL\$2/" f6
$
$ # check the file "f6" after making the change
$ cat f6
Param file
[Global]
$$ID=<33>
$$Country=<Country>
$
$

tyler_durden
# 6  
Old 06-23-2011
You are right , I was trying with $$ in my script

Code:
perl -psi -e 's/\$\$$ID=<.*>/\$\$$ID=<$val>/' -- -val=33 file

to match the pattern in the file
$$ID=<0>
$$Country=<Country

once I change to
Code:
perl -psi -e 's/\$\$ID=<.*>/\$\$ID=<$val>/' -- -val=33 file

do u think that would make a difference ?

also I am getting the run time value in the .sh script , the final version would be like

Code:
perl -psi -e 's/\$\$ID=<.*>/\$\$ID=<$valB>/' -- -valB=$X $paramP/Id_$X/CREATE_PARAM.parms

Thx a lot
-
Last edited by pludi; 06-23-2011 at 05:40 PM..
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