tldr/pages/linux/waitpid.md

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# waitpid
> Wait for the termination of arbitrary processes.
> See also: `wait`.
> More information: <https://manned.org/waitpid.1>.
- Sleep until all processes whose PIDs have been specified have exited:
`waitpid {{pid1 pid2 ...}}`
- Sleep for at most `n` seconds:
`waitpid --timeout {{n}} {{pid1 pid2 ...}}`
- Do not error if specified PIDs have already exited:
`waitpid --exited {{pid1 pid2 ...}}`
- Sleep until `n` of the specified processes have exited:
`waitpid --count {{n}} {{pid1 pid2 ...}}`
- Display help:
`waitpid -h`