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GETDTABLESIZE(2)            BSD System Calls Manual           GETDTABLESIZE(2)

NAME
     getdtablesize -- get descriptor table size

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     getdtablesize(void);

DESCRIPTION
     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
     getdtablesize() returns the size of this table.

SEE ALSO
     close(2), dup(2), open(2), select(2)

HISTORY
     The getdtablesize() function call appeared in 4.2BSD.

BSD                              June 4, 1993                              BSD