Name
waitpid
Synopsis
waitpid pid, flags
Waits for a particular child process
pid to terminate and returns the pid
when the process is dead, or -1
if there are no child processes or if the
flags specify nonblocking and the
process isn’t dead yet. The status of the dead process is returned
in $?. To get valid flag
values, do the following:
use POSIX "sys_wait_h";
On systems that implement neither the waitpid(2) nor the wait4(2) system call,
flags may be specified only as 0. In other words, you can wait for a
specific pid, but you can’t do it in
nonblocking mode.
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