bsd/man/man2/getdtablesize.2

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  32 .\"     @(#)getdtablesize.2     8.1 (Berkeley) 6/4/93
  33 .\" $FreeBSD: src/lib/libc/sys/getdtablesize.2,v 1.4.2.3 2001/12/14 18:34:00 ru Exp $
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  35 .Dd June 4, 1993
  36 .Dt GETDTABLESIZE 2
  37 .Os
  38 .Sh NAME
  39 .Nm getdtablesize
  40 .Nd get descriptor table size
  41 .Sh LIBRARY
  42 .Lb libc
  43 .Sh SYNOPSIS
  44 .In unistd.h
  45 .Ft int
  46 .Fn getdtablesize void
  47 .Sh DESCRIPTION
  48 Each process has a fixed size descriptor table,
  49 which is guaranteed to have at least 20 slots.  The entries in
  50 the descriptor table are numbered with small integers starting at 0.
  51 The call
  52 .Fn getdtablesize
  53 returns the size of this table.
  54 .Sh LEGACY
  55 The
  56 .Xr getrlimit 2
  57 function returns a value of type
  58 .Ft rlim_t .
  59 This interface, returning an
  60 .Ft int ,
  61 may have problems representing appropriate values in the future.
  62 Applications should use the
  63 .Xr getrlimit 2
  64 function instead.
  65 .Sh SEE ALSO
  66 .Xr close 2 ,
  67 .Xr dup 2 ,
  68 .Xr getrlimit 2 ,
  69 .Xr open 2 ,
  70 .Xr select 2
  71 .Sh HISTORY
  72 The
  73 .Fn getdtablesize
  74 function call appeared in
  75 .Bx 4.2 .