Wait for any child process to die

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• wait

  Behaves like wait(2) on your system: it waits for a childprocess to terminate and returns the pid of the deceased process, or-1 if there are no child processes. The status is returned in $?and ${^CHILD_ERROR_NATIVE}.Note that a return value of -1 could mean that child processes arebeing automatically reaped, as described in perlipc.

  If you use wait in your handler for $SIG{CHLD} it may accidentally for thechild created by qx() or system(). See perlipc for details.

  Portability issues: wait in perlport.