Typeset issues

Asadullah Rathore · 09-23-2005, 04:55 AM

Hello,

The problem is as follows :

IN UNIX MPRAS :-

file :- check

Contents :-

#!/usr/bin/ksh

function pic
{

echo "Hello"

}

typeset -fx pic

./$1

file :- sample

Contents:-

pic

on prompt :- ./check sample
output :- Hello

Same code and files are present in kshell in Red Hat Enterprise Version 3.

output is :- .lf 1 -

Why is there a difference? How can the same output in Red Hat be produced using a similar procedure ?

Thank you.

wmakowski · 09-24-2005, 12:07 PM

The problem here is that the check script is not executing your pic function at the ./$1 statement. It is starting another process and running pic which is a program to compile pictures for troff or TeX. However, if you execute sample in the same process it will work as you expect. Using . ./sample executes the contents of sample in the same process. Using ./sample starts another process to execute sample and the pic function is not available to that process. Here is the code I used to produce the desired result.

check script

Code:

#!/usr/bin/ksh
 
function pic
{
echo "Hello"
}
 
. ./$1

sample script

Code:

pic

Note that I removed the typeset command. AFAIK functions cannot be exported like variables in ksh. They can be made available in memory using .profile or $FPATH along with the autoload feature of ksh. The only typeset options I have used with functions are -f -f fname +f -ft +ft and -fu. Function names do take precedence over executables or scripts so take care in what you name them.

Bill