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.\" 4. 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.\" $FreeBSD$ 34.\" 35.Dd April 22, 2006 36.Dt FCLOSE 3 37.Os 38.Sh NAME 39.Nm fclose , 40.Nm fcloseall 41.Nd close a stream 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.In stdio.h 46.Ft int 47.Fn fclose "FILE *stream" 48.Ft void 49.Fn fcloseall void 50.Sh DESCRIPTION 51The 52.Fn fclose 53function 54dissociates the named 55.Fa stream 56from its underlying file or set of functions. 57If the stream was being used for output, any buffered data is written 58first, using 59.Xr fflush 3 . 60.Pp 61The 62.Fn fcloseall 63function calls 64.Fn fclose 65on all open streams. 66.Sh RETURN VALUES 67Upon successful completion 0 is returned. 68Otherwise, 69.Dv EOF 70is returned and the global variable 71.Va errno 72is set to indicate the error. 73In either case no further access to the stream is possible. 74.Sh ERRORS 75The 76.Fn fclose 77function 78may also fail and set 79.Va errno 80for any of the errors specified for the routines 81.Xr close 2 82or 83.Xr fflush 3 . 84.Sh NOTES 85The 86.Fn fclose 87function 88does not handle NULL arguments; they will result in a segmentation 89violation. 90This is intentional - it makes it easier to make sure programs written 91under 92.Fx 93are bug free. 94This behaviour is an implementation detail, and programs should not 95rely upon it. 96.Sh SEE ALSO 97.Xr close 2 , 98.Xr fflush 3 , 99.Xr fopen 3 , 100.Xr setbuf 3 101.Sh STANDARDS 102The 103.Fn fclose 104function 105conforms to 106.St -isoC . 107.Pp 108The 109.Fn fcloseall 110function first appeared in 111.Fx 7.0 . 112