Add wait4 C binding to extunix (#58)
This commit introduces a C binding for `wait4`, allowing retrieval of
resource usage statistics for child processes. The new OCaml function
exposes `wait4` with support for Unix wait flags and returns process
status along with resource usage metrics.
- Define `rusage` type to encapsulate relevant resource usage fields.
- Implement `wait4` binding to interface with the system call.
- Provide documentation for `rusage` and `wait4`.
aa961a
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Mar 11 15:20 +00:00