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.\" $FreeBSD$ 38.\" 39.Dd June 4, 1993 40.Dt FCLOSE 3 41.Os 42.Sh NAME 43.Nm fclose , 44.Nm fcloseall 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.Ft void 53.Fn fcloseall void 54.Sh DESCRIPTION 55The 56.Fn fclose 57function 58dissociates the named 59.Fa stream 60from its underlying file or set of functions. 61If the stream was being used for output, any buffered data is written 62first, using 63.Xr fflush 3 . 64.Pp 65The 66.Fn fcloseall 67function calls 68.Fn fclose 69on all open streams. 70.Sh RETURN VALUES 71Upon successful completion 0 is returned. 72Otherwise, 73.Dv EOF 74is returned and the global variable 75.Va errno 76is set to indicate the error. 77In either case no further access to the stream is possible. 78.Sh ERRORS 79The 80.Fn fclose 81function 82may also fail and set 83.Va errno 84for any of the errors specified for the routines 85.Xr close 2 86or 87.Xr fflush 3 . 88.Sh NOTES 89The 90.Fn fclose 91function 92does not handle NULL arguments; they will result in a segmentation 93violation. 94This is intentional - it makes it easier to make sure programs written 95under 96.Fx 97are bug free. 98This behaviour is an implementation detail, and programs should not 99rely upon it. 100.Sh SEE ALSO 101.Xr close 2 , 102.Xr fflush 3 , 103.Xr fopen 3 , 104.Xr setbuf 3 105.Sh STANDARDS 106The 107.Fn fclose 108function 109conforms to 110.St -isoC . 111.Pp 112The 113.Fn fcloseall 114function first appeared in 115.Fx 7.0 . 116