=head1 TITLE

wait() and waitpid() should return false on failure

=head1 VERSION

  Maintainer: Nathan Torkington <gnat@frii.com>
  Date: 13 Sep 2000
  Mailing List: perl6-language@perl.org
  Number: 220
  Version: 1
  Status: Developing

=head1 ABSTRACT

All system calls in Perl should return false on failure.

=head1 DESCRIPTION

wait() and waitpid() return -1 on failure.  They should
return C<undef>, and return C<"0 but true"> if the system call
returned 0.

=head1 IMPLEMENTATION

Straightforward.  The perl526 translator simply wraps the perl6 wait()
and waitpid():

  do { my $r = waitpid(...); return -1 if !defined $r;
       return 0 if !$r; $r }

=head1 REFERENCES

the perlfunc manpage for information on waitpid() and wait()