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How can we make a system call within Perl

Hi,
How can we make a system call within Perl?

For example, I do the following in the command line. Now I wanna make the same in Perl.

java -jar myFirstcode.java input1 input2

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Thanks,

Tolgar

ASKER

Also, let's say for some reason it cannot make the system call. How can I catch the exception in try catch?

Can you please send me an example code that is very safe in handling this exception?

Thanks,

SOLUTION

sjklein42

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sjklein42

The exit status is available in $?

$output  = `java -jar myFirstcode.java input1 input2`;
$program_retval = $? >> 8;

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Tolgar

ASKER

I did this. I think it is same as your first suggestion:

system("java -jar myFirstcode.java input1 input2");

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But I didn't understand your second reply. Is it related with the second part of my question which is about catching exceptions?

Thanks,

sjklein42

Hi.

Using system is fine, too.

Yes, my second note had to do with how to examine the $? variable to determine the status of the command. It applies to the system function as well as to the backtick operator.

ASKER CERTIFIED SOLUTION

wilcoxon

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wilcoxon

The advantage to backticks is that you can capture the output of the call. If you don't need to do that, I would use system.

sjklein42

@wilcoxon is the expert on this. What he say.

Tolgar

ASKER

Both solutions are very good but I picked wilcoxon's solution as best becasue it covers both questions and two different methods in a very descriptive way. But as I said both solutions are great.

Thanks,