Question

lets say I had a file(.csh)

File Contents

Script_1
{
 code of script1
}

Script_2
{
    code of script2
 }
.
.
.

Script_n
{

 code of script_n

}

Now the thing is if we run like

 ./file.csh -script1 <other arguments>

it should execute only script 1 code
Like wise , if we run

./file.csh  -script2 <other arguments>

it should execute only script 2 code

Can any one tell the idea how to accomplish that?

Answer 1

You can grab command line parameters via $n where n is integer > 0 in order of argument passed

#!/bin/csh
if ($#argv < 1) then
    echo "Usage: $0 (-script1|-script2) <args>"
    exit 0
endif

if ($1 == '-script1') then
# run Script_1
else
# run Script_2
endif;

If you’d like to get all arguments except the first one together, you can use shift:

#!/bin/csh

// without argument by default operates on $argv which is all the arguments 
// passed via command line
shift 

echo $argv // now contains all arguments but the first