julio_514 has asked for the wisdom of the Perl Monks concerning the following question:

Dear monks, I'm writing a Perl pipeline which consists of a script executing other scripts (Perl and non-Perl). My question: Say I have scriptA. ScriptA executed well and returns valueX that will act as input of scriptB. But suppose, there was a problem in the execution of scriptA and it did not return valueX, what would be the best way (command) to make my pipeline die? I tried: 
system($scriptA);
#? == -1 ? die "Command failed: $!\n" : print "Command executed succes
+sfuly\n";

[download]
This line works fine if I called a command that does not exists (script will die), but I believe that proceeding this way do not make the script die if the command is found and called but not executed because of wrong/absent arguments...? Thanks,

Replies are listed 'Best First'.
Re: How to determine of script executed correctly?
by choroba (Cardinal) on Apr 20, 2012 at 21:31 UTC
    You probably mean $? instead of #?. If you want your script to die on any error, use rather 
    if ($? != 0) {
    die "Command failed: $!";
} else {
    print "Command executed successfuly.\n";
}

    [download]
    But it really depends on the command itself and what exit status it returns in various situations.
[reply]
[d/l]
[select]
      Yeah my bad it is indeed $?. Ok thanks, seems to work fine!
[reply]
Re: How to determine of script executed correctly?
by davies (Monsignor) on Apr 20, 2012 at 21:36 UTC
[reply]

Back to Seekers of Perl Wisdom