Be more verbose.
-t, --timeout seconds
Maximum wait time.
Don’t error on already exited PIDs.
-c, --count count
Number of process exits to wait for.
Display help text and exit.
Print version and exit.
The waitpid command is part of the util-linux package which can
be downloaded from Linux Kernel Archive
<https://www.kernel.org/pub/linux/utils/util-linux/>. This page
is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have
a bug report for this manual page, send it to
firstname.lastname@example.org. This page was obtained from the
project's upstream Git repository
2023-06-23. (At that time, the date of the most recent commit
that was found in the repository was 2023-06-22.) If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in
this COLOPHON (which is not part of the original manual page),
send a mail to email@example.com
util-linux 2.39-rc1-48-53d225 2023-03-29 WAITPID(1)