.\" Copyright (c) 1990, 1991, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" This code is derived from software contributed to Berkeley by .\" Chris Torek and the American National Standards Committee X3, .\" on Information Processing Systems. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)fclose.3 8.1 (Berkeley) 6/4/93 .\" $FreeBSD: src/lib/libc/stdio/fclose.3,v 1.15 2007/01/09 00:28:06 imp Exp $ .\" .Dd April 22, 2006 .Dt FCLOSE 3 .Os .Sh NAME .Nm fclose , .Nm fcloseall .Nd close a stream .Sh LIBRARY .Lb libc .Sh SYNOPSIS .In stdio.h .Ft int .Fn fclose "FILE *stream" .Ft void .Fn fcloseall void .Sh DESCRIPTION The .Fn fclose function dissociates the named .Fa stream from its underlying file or set of functions. If the stream was being used for output, any buffered data is written first, using .Xr fflush 3 . .Pp The .Fn fcloseall function calls .Fn fclose on all open streams. .Sh RETURN VALUES Upon successful completion 0 is returned. Otherwise, .Dv EOF is returned and the global variable .Va errno is set to indicate the error. In either case no further access to the stream is possible. .Sh ERRORS The .Fn fclose function may also fail and set .Va errno for any of the errors specified for the routines .Xr close 2 or .Xr fflush 3 . .Sh NOTES The .Fn fclose function does not handle NULL arguments; they will result in a segmentation violation. This is intentional - it makes it easier to make sure programs written under .Fx are bug free. This behaviour is an implementation detail, and programs should not rely upon it. .Sh SEE ALSO .Xr close 2 , .Xr fflush 3 , .Xr fopen 3 , .Xr setbuf 3 .Sh STANDARDS The .Fn fclose function conforms to .St -isoC . .Pp The .Fn fcloseall function first appeared in .Fx 7.0 .