Reference

getdtablesize(2)

get descriptor table size

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.

LEGACY

The getrlimit(2) function returns a value of type rlim_t. This interface, returning an int, may have problems representing appropriate values in the future. Applications should use the getrlimit(2) function instead.

SEE ALSO

close(2), dup(2), getrlimit(2), open(2), select(2)

HISTORY

The getdtablesize() function call appeared in 4.2BSD.

History