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GETDTABLESIZE(3) Library Functions Manual GETDTABLESIZE(3)

getdtablesizeget descriptor table size

#include <unistd.h>


Each process has a fixed size descriptor table, which is guaranteed to have at least 20 slots. The entries in the descriptor table are numbered with small integers starting at 0. The call () returns the size of this table.

close(2), dup(2), getdtablecount(2), getrlimit(2), open(2), select(2), setrlimit(2), sysconf(3), sysctl(2)

The getdtablesize() function call appeared in 4.2BSD.

January 12, 2018 OpenBSD-6.5