wait - await process completion
If no argument is specified, wait waits until all processes (started
with &&&&) of the current shell have completed, and reports on abnormal
terminations. If a numeric argument pid is given and is the process
ID of a background process, wait waits until that process has
completed. Otherwise, if pid is not a background process, wait exits
without waiting for any processes to complete.
Because the wait() system call must be executed in the parent process,
the shell itself executes wait without creating a new process (see
wait supports the following command line arguments:
pid The unsigned decimal integer process ID of a command,
whose termination wait is to wait for.
Some processes in a 2-or-more-stage pipeline may not be children of
the shell, and thus cannot be waited for.
csh(1), ksh(1), sh-posix(1), sh(1), wait(2).
wait: SVID2, SVID3, XPG2, XPG3, XPG4, POSIX.2
Hewlett-Packard Company - 1 - HP-UX Release 11i: November 2000