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Bruce Blake
873fbe99aa
On macOS the RLIMIT_NOFILE soft limit is not a bound on the descriptor table: setrlimit accepts soft limits above kern.maxfilesperproc, RLIM_INFINITY included, and getrlimit reports what was set, so returning the guest soft limit alone could report up to INT_MAX for a table of about 122880 descriptors, and a closefrom-style loop up to that value would run billions of iterations instead of about 122k. Return the smaller of the guest soft limit and the host's ::getdtablesize(), which is the FreeBSD sys_getdtablesize result. The guest test derives its expectation from the host call instead of the implementation's formula, and the debt entry no longer claims the limit is raised when libkernel loads outside Linux. Reported by jotitadev in review of the getdtablesize implementation.