pwait - Man Page

pwait [-v] PID...

Wait for all of the specified processes to terminate. Unlike wait(1), the target processes do not need to be children of the calling process.

-v

Verbose. Reports terminations to standard output. When the target process is a child of the calling process, the wait status is also displayed.

PID

Process ID. A /proc/pid path may also be used, allowing shell expansions like /proc/* to target all processes on the system.

0 on success, non-zero if an error occurs (such as no such process, permission denied, or invalid option).

/proc/pid/*

Process information and control files.

wait(1), proc(5)