in reply to EXEC fails, sometimes

Do you check for errors? 

exec(...)
   or die("Unable to spawn ... application: $!\n");

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The above would tell you the reason the program couldn't be launched.

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Re^2: EXEC fails, sometimes
by simpsope (Initiate) on Dec 15, 2005 at 16:29 UTC
    Yes, I get this error text: Invalid Arguement
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      Ah, the exec is NOT failing. It's the Perl script that's failing. It doesn't like the arguments you passed to it. You probably used exec("program $arg1 $arg2") without quoting and escaping the contents of arg1 and arg2. (Injection attack vulnerability!) You could properly quote and escape their contents properly, or use exec("program", $arg1, $arg2) which calls the program directly instead of passing the command string to an intermidary shell.
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        Well, I'd buy that arguement if the code had any arguements. I've narrowed it down by running this: 
        #!c:\Perl\bin\Perl
                                    
print "\n Line from print_1.pl \n";
exec "print_2.pl";    
print "\n ERROR from print_1.pl: $! \n";

__END__

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        And I get this result: 
        j:> print_1.pl    
j:> Line from print_1.pl
j:> ERROR from print_1.pl: Invalid arguement

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        I probably didn't explain well enough that ther same code works just fine on another Windows server. Obviously a setting somewhere that different. But that's where I'm stumped.
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