=over =item wait X Behaves like wait(2) on your system: it waits for a child process to terminate and returns the pid of the deceased process, or C<-1> if there are no child processes. The status is returned in C<$?> and C<${^CHILD_ERROR_NATIVE}>. Note that a return value of C<-1> could mean that child processes are being automatically reaped, as described in L. If you use wait in your handler for $SIG{CHLD} it may accidentally for the child created by qx() or system(). See L for details. Portability issues: L. =back