1*8269e767SBrooks Davis.\" Copyright (c) 1983, 1991, 1993 2*8269e767SBrooks Davis.\" The Regents of the University of California. All rights reserved. 3*8269e767SBrooks Davis.\" 4*8269e767SBrooks Davis.\" Redistribution and use in source and binary forms, with or without 5*8269e767SBrooks Davis.\" modification, are permitted provided that the following conditions 6*8269e767SBrooks Davis.\" are met: 7*8269e767SBrooks Davis.\" 1. Redistributions of source code must retain the above copyright 8*8269e767SBrooks Davis.\" notice, this list of conditions and the following disclaimer. 9*8269e767SBrooks Davis.\" 2. Redistributions in binary form must reproduce the above copyright 10*8269e767SBrooks Davis.\" notice, this list of conditions and the following disclaimer in the 11*8269e767SBrooks Davis.\" documentation and/or other materials provided with the distribution. 12*8269e767SBrooks Davis.\" 3. Neither the name of the University nor the names of its contributors 13*8269e767SBrooks Davis.\" may be used to endorse or promote products derived from this software 14*8269e767SBrooks Davis.\" without specific prior written permission. 15*8269e767SBrooks Davis.\" 16*8269e767SBrooks Davis.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17*8269e767SBrooks Davis.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18*8269e767SBrooks Davis.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*8269e767SBrooks Davis.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20*8269e767SBrooks Davis.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*8269e767SBrooks Davis.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*8269e767SBrooks Davis.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*8269e767SBrooks Davis.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*8269e767SBrooks Davis.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*8269e767SBrooks Davis.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*8269e767SBrooks Davis.\" SUCH DAMAGE. 27*8269e767SBrooks Davis.\" 28*8269e767SBrooks Davis.Dd April 24, 2013 29*8269e767SBrooks Davis.Dt GETDTABLESIZE 2 30*8269e767SBrooks Davis.Os 31*8269e767SBrooks Davis.Sh NAME 32*8269e767SBrooks Davis.Nm getdtablesize 33*8269e767SBrooks Davis.Nd get file descriptor limit 34*8269e767SBrooks Davis.Sh LIBRARY 35*8269e767SBrooks Davis.Lb libc 36*8269e767SBrooks Davis.Sh SYNOPSIS 37*8269e767SBrooks Davis.In unistd.h 38*8269e767SBrooks Davis.Ft int 39*8269e767SBrooks Davis.Fn getdtablesize void 40*8269e767SBrooks Davis.Sh DESCRIPTION 41*8269e767SBrooks DavisThe 42*8269e767SBrooks Davis.Fn getdtablesize 43*8269e767SBrooks Davissystem call returns the maximum number of file descriptors 44*8269e767SBrooks Davisthat the current process may open. 45*8269e767SBrooks DavisThe maximum file descriptor number that the system may assign 46*8269e767SBrooks Davisis the return value minus one. 47*8269e767SBrooks DavisExisting file descriptor numbers may be higher 48*8269e767SBrooks Davisif the limit was lowered after they were opened. 49*8269e767SBrooks Davis.Sh SEE ALSO 50*8269e767SBrooks Davis.Xr close 2 , 51*8269e767SBrooks Davis.Xr closefrom 2 , 52*8269e767SBrooks Davis.Xr dup 2 , 53*8269e767SBrooks Davis.Xr getrlimit 2 , 54*8269e767SBrooks Davis.Xr sysconf 3 55*8269e767SBrooks Davis.Sh HISTORY 56*8269e767SBrooks DavisThe 57*8269e767SBrooks Davis.Fn getdtablesize 58*8269e767SBrooks Davissystem call appeared in 59*8269e767SBrooks Davis.Bx 4.2 . 60