os Directory Reference

Files
	renv.h
	Environment-variable accessors (getenv / setenv / unsetenv wrappers).
	rmodule.h
	Dynamic library loading (dlopen / LoadLibrary) with symbol and section lookup.
	rproc.h
	Current-process introspection: debugger detection, executable path / name, and process ID.
	rsignal.h
	SIGALRM-based one-shot and interval timers.
	rsys.h
	CPU / NUMA-node counts and sets, plus a refcounted hardware topology object.
	rtty.h
	TTY-aware printing: ANSI SGR escape sequences, isatty detection and overridable stdout / stderr sinks.