can we pass parameter to shell function ?

I would like to create a generalized function in KSH to issue an error message.

I am having files like file1, file2,file3.....

main script start here :
==========================================

if (test $flg -eq 1) then
....
check_file
....
elseif (test $flg -eq 2) then
.....
check_file
.....
elseif (test $flg -eq 3) then
.....
check_file
.....
else
       echo "Nothing passed"

fi

echo "DONE"


called function
----------------

function check_file{
       if (test -f $file_n ) then
           echo "file : $file_n exist"
       else
           echo "file not exist"
       fi
}

My question is how to pass those files (file1, file2, file3, etc) into function "check_file" ?


Any Help ?

Thanks in advance.

LVL 1
cmurugavelAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

ecwCommented:

function check_file{
      if (test -f "$1" ) then
          echo "file : $1 exist"
      else
          echo "file not exist"
      fi
}

...
check_file file1
...
check_file file2
...
check_file file3
...
0
cmurugavelAuthor Commented:
How do we send the $1 from calling place?

sometime I may pass the "file" in 4th or 5th.. parameter, In this case, again I have to change $n  (n can be 1,2 ..n)
in the function definition.

In C,
-------

int var=10;

main ()
{
   fn(var)
}

fn (int a_var)
{
  if (var != 10) {
    return 1;
  eles
    return 0;
}


------------------------

I would like create a shell like above menthod. Is it possible?

 
0
ecwCommented:
In ksh, during the execution lifetime of a function, positional parameters are the arguments to the function, not the arguments to the script.  Bourne shell isn't as advanced, if one passes arguments to a function, these replace the global positonal parameters.  Try,

pargs()
{
  echo "pargs: first arg is $1, all args are $*"
}

pargs hello world

echo "script: first args is $1, all args are $*"

run the above under ksh, and plain old sh (not POSIX sh).

As your example is obviously not bourne shell, you can user
  check_file "$1"
if the file is the first arg to the script (or calling function), or
  check_file "$2"
if the second arg, etc.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
cmurugavelAuthor Commented:
Yes. u r right.

I tried. It works fine in ksh.

Thanks.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
System Programming

From novice to tech pro — start learning today.