When I run this manually in a terminal, I get the following output: 

$ echo $?; echo $PWD; echo $?; echo $HA; echo $?
0
/home/MyDir/projects/perl/monks
0

0

[download]
When I run the perl code, I get: 
$ perl test_prog.pl
0
/home/MyDir/projects/perl/monks
0

0

[download]

I find nothing weird in the code that you should return a 1, since the echo $HA as a shell command would only echo $HA or a blank line (if $HA is nothing), and thus be successful either way; hence, 0.

Hope that helped,
-v
"Perl. There is no substitute."

In reply to Re: unix $? problem by Velaki
in thread unix $? problem by EchoAngel

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