1994-05-27 05:00:24 +00:00
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.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)getdtablesize.2 8.1 (Berkeley) 6/4/93
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1999-08-28 00:22:10 +00:00
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.\" $FreeBSD$
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1994-05-27 05:00:24 +00:00
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.\"
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2013-04-24 21:24:35 +00:00
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.Dd April 24, 2013
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1994-05-27 05:00:24 +00:00
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.Dt GETDTABLESIZE 2
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2001-07-10 13:41:46 +00:00
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.Os
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1994-05-27 05:00:24 +00:00
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.Sh NAME
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.Nm getdtablesize
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2013-04-24 21:24:35 +00:00
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.Nd get file descriptor limit
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2000-04-21 09:42:15 +00:00
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.Sh LIBRARY
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.Lb libc
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1994-05-27 05:00:24 +00:00
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.Sh SYNOPSIS
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2001-10-01 16:09:29 +00:00
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.In unistd.h
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1994-05-27 05:00:24 +00:00
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.Ft int
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.Fn getdtablesize void
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.Sh DESCRIPTION
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2002-12-18 09:22:32 +00:00
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The
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1994-05-27 05:00:24 +00:00
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.Fn getdtablesize
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2013-04-24 21:24:35 +00:00
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system call returns the maximum number of file descriptors
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that the current process may open.
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The maximum file descriptor number that the system may assign
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is the return value minus one.
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Existing file descriptor numbers may be higher
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if the limit was lowered after they were opened.
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1994-05-27 05:00:24 +00:00
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.Sh SEE ALSO
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.Xr close 2 ,
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2013-04-24 21:24:35 +00:00
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.Xr closefrom 2 ,
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1994-05-27 05:00:24 +00:00
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.Xr dup 2 ,
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2013-04-24 21:24:35 +00:00
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.Xr getrlimit 2 ,
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.Xr sysconf 2
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1994-05-27 05:00:24 +00:00
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.Sh HISTORY
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The
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1999-09-05 07:02:22 +00:00
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.Fn getdtablesize
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2002-12-18 09:22:32 +00:00
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system call appeared in
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1994-05-27 05:00:24 +00:00
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.Bx 4.2 .
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