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. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)fclose.3 8.1 (Berkeley) 6/4/93 33.\" $FreeBSD: src/lib/libc/stdio/fclose.3,v 1.15 2007/01/09 00:28:06 imp Exp $ 34.\" $DragonFly: src/lib/libc/stdio/fclose.3,v 1.4 2004/06/07 16:37:56 hmp Exp $ 35.\" 36.Dd April 22, 2006 37.Dt FCLOSE 3 38.Os 39.Sh NAME 40.Nm fclose , 41.Nm fcloseall 42.Nd close a stream 43.Sh LIBRARY 44.Lb libc 45.Sh SYNOPSIS 46.In stdio.h 47.Ft int 48.Fn fclose "FILE *stream" 49.Ft void 50.Fn fcloseall void 51.Sh DESCRIPTION 52The 53.Fn fclose 54function 55dissociates the named 56.Fa stream 57from its underlying file or set of functions. 58If the stream was being used for output, any buffered data is written 59first, using 60.Xr fflush 3 . 61.Pp 62The 63.Fn fcloseall 64function calls 65.Fn fclose 66on all open streams. 67.Sh RETURN VALUES 68Upon successful completion 0 is returned. 69Otherwise, 70.Dv EOF 71is returned and the global variable 72.Va errno 73is set to indicate the error. 74In either case no further access to the stream is possible. 75.Sh ERRORS 76The 77.Fn fclose 78function 79may also fail and set 80.Va errno 81for any of the errors specified for the routines 82.Xr close 2 83or 84.Xr fflush 3 . 85.Sh NOTES 86The 87.Fn fclose 88function 89does not handle NULL arguments; they will result in a segmentation 90violation. 91This is intentional - it makes it easier to make sure programs written 92under 93.Dx 94are bug free. 95This behaviour is an implementation detail, and programs should not 96rely upon it. 97.Sh SEE ALSO 98.Xr close 2 , 99.Xr fflush 3 , 100.Xr fopen 3 , 101.Xr setbuf 3 102.Sh STANDARDS 103The 104.Fn fclose 105function 106conforms to 107.St -isoC . 108.Pp 109The 110.Fn fcloseall 111function first appeared in 112.Dx 2.3 . 113