Shell Programming and Scripting

I have one script which consists of variables number of parameter and stuckup with following logic

case:1
script:
parameteres are
username,password,P1=v1,P2=v2,P3=v3

case:2
script:
parameteres are
username,password,P1=v1,P2=v2,P3=v3,P4=v4

i will pass username,password for all the script and no of parameters after that is not fixed.It may be 3 or 4 or 5 etc

I want to store rest of parameters in a variable except username and password.

case:1 output

v=-param P1=v1 -param P2=v2 -param P3=v3


case:2 output

v=-param P1=v1 -param P2=v2 -param P3=v3 -param P4=v4

Would this thread help?

New to shell script and any input will be appreciated. Not able to understand completly

Well, what do you expect? Did you try the proposals given? Did you understand the results and how they are achieved? Consult your shell's man page for details of the constructs shown.

If you've got any difficulties, explain what it is you don't understand, and I'm sure you'll get help.

1)Thanks for reply

This is my script:script.sh

Code:

Numbr_Parms=$#
a=`expr $Numbr_Parms - 2`
while [ $a -le $Numbr_Parms ]
do
if [ "$a" =  "3" ]
then
   PARAMSTRING="-param $3"
else
   PARAMSTRING="$PARAMSTRING -param $a"
   
fi
a=`expr $a + 1`
done
echo $PARAMSTRING

Running:

Code:

script.sh  username pass p1=v1 p2=v2 p3=v3

Expected output:

Code:

-param p1=v1 -param p2=v2 -param p3=v3

But i am getting:$PARAMSTRING as

Code:

-param p1=v1 -param 4 -param 5

Not sure what is the Issue with $4 and $5

Moderator's Comments:

Please use code tags as required by forum rules!

You obviously started by copying the original script that notoriously was erroneous. And you reproduced and confirmed the error. How about looking and testing out the solutions provided?

Not working tried below thing.

Code:

Numbr_Parms=$#
a=`expr $Numbr_Parms - 2`
while [ $a -le $Numbr_Parms ]
do
if [ "$a" =  "3" ]
then
   PARAMSTRING="-param $3"
else
   temp=\$$a
   PARAMSTRING="$PARAMSTRING -param \$$temp"
   
fi
a=`expr $a + 1`
done
echo $PARAMSTRING