1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Chris Torek and the American National Standards Committee X3, 6.\" on Information Processing Systems. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 3. All advertising materials mentioning features or use of this software 17.\" must display the following acknowledgement: 18.\" This product includes software developed by the University of 19.\" California, Berkeley and its contributors. 20.\" 4. Neither the name of the University nor the names of its contributors 21.\" may be used to endorse or promote products derived from this software 22.\" without specific prior written permission. 23.\" 24.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34.\" SUCH DAMAGE. 35.\" 36.\" @(#)fclose.3 8.1 (Berkeley) 6/4/93 37.\" $FreeBSD: src/lib/libc/stdio/fclose.3,v 1.7.2.4 2001/12/14 18:33:57 ru Exp $ 38.\" $DragonFly: src/lib/libc/stdio/fclose.3,v 1.4 2004/06/07 16:37:56 hmp Exp $ 39.\" 40.Dd June 4, 1993 41.Dt FCLOSE 3 42.Os 43.Sh NAME 44.Nm fclose 45.Nd close a stream 46.Sh LIBRARY 47.Lb libc 48.Sh SYNOPSIS 49.In stdio.h 50.Ft int 51.Fn fclose "FILE *stream" 52.Sh DESCRIPTION 53The 54.Fn fclose 55function 56dissociates the named 57.Fa stream 58from its underlying file or set of functions. 59If the stream was being used for output, any buffered data is written 60first, using 61.Xr fflush 3 . 62.Sh RETURN VALUES 63Upon successful completion 0 is returned. 64Otherwise, 65.Dv EOF 66is returned and the global variable 67.Va errno 68is set to indicate the error. 69In either case no further access to the stream is possible. 70.Sh ERRORS 71The 72.Fn fclose 73function 74may also fail and set 75.Va errno 76for any of the errors specified for the routines 77.Xr close 2 78or 79.Xr fflush 3 . 80.Sh NOTES 81The 82.Fn fclose 83function 84does not handle NULL arguments; they will result in a segmentation 85violation. 86This is intentional - it makes it easier to make sure programs written 87under 88.Dx 89are bug free. 90This behaviour is an implementation detail, and programs should not 91rely upon it. 92.Sh SEE ALSO 93.Xr close 2 , 94.Xr fflush 3 , 95.Xr fopen 3 , 96.Xr setbuf 3 97.Sh STANDARDS 98The 99.Fn fclose 100function 101conforms to 102.St -isoC . 103