Shell Programming and Scripting

Hi all this is simple but bad day for me nothing work out ..

Problem is that I wan to check the argument passed to my script and accordignly exit or setup ENV variable

I have a script name src_cpcp_preproc.sh
i want to pass 2 argumet from command line argumet and check it in the script on following way :

src_cpcp_preproc.sh cpc P #P -for production,Q-qa and D-for development so $2 could be either of these three

I want to write a one liner which can check the three condition in a if statement

condition are if $# is less then 2 && either one of $2 is not P || Q || D then i should quit !
else i should set envment variable .

I had written if[ ($# -lt 2) && ("$2" -ne "P" ) ||("$2" -ne "Q") || ("$2" -ne D)]
then
echo "Use : ...."
exit 11
fi

Tell me where i am wrong ?

What does || mean in your condition ?

| mean the or condition

Try this i am doing in opposite way.

Code:

if [ $# -eq 2 -a "$2" = "P" -o $# -eq 2 -a "$2" = "Q" -o $# -eq 2 -a "$2" = "D" ]
then
echo "OKAY usage"
else
echo "improper usage"
exit 
fi

The above code is checking if no of parameters are two and the second param should be P,Q or D.

-a for and
-o for or

how about the following
Code:
#!/usr/bin/ksh

if [[ $# -le 2 ]] && [[ $2 != "P" || $2 != "Q" || $2 != "D" ]] then
echo "Improper Usage"
exit 1;
else
echo "Success"
exit 1;
fi

Output
(/export/home/)->test.ksh P Q D
Success
(/export/home/)->test.ksh P
Improper Usage

BTW, I think your code has an error, I thought you only use -ne for integer and "=" for string. Perhaps that is why it did not work for you.

ahtat it is not working the way i am expecting
this is working anly when i am giving -> .test.sh P Q D
success
but i want the following thing ->test.sh scr P
success
-> test.sh scr Q
success
-> test.sh xxs D
success
first parameter could be any thing but when the second one is either P OR Q OR D
then it should show success !
surprise although you code seems to be work but it is not giving the out put the way it should . can you please tell me what could gone wrong with this ?