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NetBSD 6.1.5 - man page for getdtablesize (netbsd section 3)

GETDTABLESIZE(3)		   BSD Library Functions Manual 		 GETDTABLESIZE(3)

NAME
     getdtablesize -- get descriptor table size

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     getdtablesize(void);

DESCRIPTION
     The getdtablesize function is an equivalent of sysconf() with _SC_OPEN_MAX.

SEE ALSO
     close(2), dup(2), getrlimit(2), open(2), select(2), sysconf(3)

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

     Historically, each process had 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 start-
     ing at 0.	The call getdtablesize() used to return the size of this table.  It doesn't make
     much sense these days because the size of the table is dynamic.

BSD					 January 5, 2012				      BSD


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