Dear Monks,

I need to write some recursive subroutine that in each entry has to

  1. save STDOUT and STDERR,
  2. change it to redirect them to some files,
  3. do something with them and call itself under the apropriate conditions
  4. recover the old values.
I know how to do it using "old style" with the ">&" descriptor. I.e. something like: 
  my $log = ...;
  my $err = ...;
 
  open(SAVEOUT, ">&STDOUT") or die ...
  open(STDOUT,"> $log") or die ..

  open(SAVEERR, ">&STDERR") or die ...
  open(STDERR,"> $err") or die ..

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but I need to use lexical variables $SAVEOUT, and $SAVEERR instead of global variables. The problem being that to recover the old values I have now: 

  open(STDOUT, ">&SAVEOUT");
  open(STDERR, ">&SAVEERR");

[download]

I assume that this construction will not work If I use it with lexical variables? i.e. 

  open(STDOUT, ">&$SAVEOUT");
  open(STDERR, ">&$SAVEERR");

[download]

How can I do it?

Thanks!

Casiano

In reply to Recursively changing STDOUT by casiano

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