Oeschey, Lars (I/ET-83, extern) <>  wrote:
>  Hi,
>  
>  I have a problem getting the output of a system call. It's a simple
>  code:
>  
>  my $return=`$command`;
>  print "$?\n";
>  print "result:$return\n";
>  
>  (I am calling a command which actually doesn't exist, to check error
>  handling)
>  
>  as result on the console I have:
>  
>  Das System kann das angegebene Laufwerk nicht finden.
>  256
>  result:
>  
>  The first error says it can't find the program. Actually I expected
>  this in $return. 
>  
>  compared to system():
>  
>  my $return=system("$command");
>  print "$?\n";
>  print "result:$return\n";
>  
>  Das System kann das angegebene Laufwerk nicht finden.
>  256
>  result:256
>  
>  So obviously system() returns the error code. But why don't the
>  backticks return anything at all? Ideally I'd want all the output
>  catched to log, but still be able to react on errors...  

Backticks only capture output from stdout, while error messages are
generally output on stderr. In unix-like shells it usual to redirect
stderr to stdout by adding 2> &1 to the command line. I don't know if it
works the same on win32, but it might be worth a try, if that is your
platform.

Also, you could always try verifying that the command exists before
trying to run it.

HTH

-- 
Brian Raven 
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