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fclose(3) [linux man page]

FCLOSE(3)						     Linux Programmer's Manual							 FCLOSE(3)

NAME
fclose - close a stream SYNOPSIS
#include <stdio.h> int fclose(FILE *fp); DESCRIPTION
The fclose() function flushes the stream pointed to by fp (writing any buffered output data using fflush(3)) and closes the underlying file descriptor. The behaviour of fclose() is undefined if the stream parameter is an illegal pointer, or is a descriptor already passed to a previous invo- cation of fclose(). RETURN VALUE
Upon successful completion 0 is returned. Otherwise, EOF is returned and the global variable errno is set to indicate the error. In either case any further access (including another call to fclose()) to the stream results in undefined behavior. ERRORS
EBADF The file descriptor underlying fp is not valid. The fclose() function may also fail and set errno for any of the errors specified for the routines close(2), write(2) or fflush(3). CONFORMING TO
C89, C99. NOTES
Note that fclose() only flushes the user space buffers provided by the C library. To ensure that the data is physically stored on disk the kernel buffers must be flushed too, for example, with sync(2) or fsync(2). SEE ALSO
close(2), fcloseall(3), fflush(3), fopen(3), setbuf(3) COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. GNU
2009-02-23 FCLOSE(3)

Check Out this Related Man Page

FCLOSE(3)						     Linux Programmer's Manual							 FCLOSE(3)

NAME
fclose - close a stream SYNOPSIS
#include <stdio.h> int fclose(FILE *stream); DESCRIPTION
The fclose() function flushes the stream pointed to by stream (writing any buffered output data using fflush(3)) and closes the underlying file descriptor. The behaviour of fclose() is undefined if the stream parameter is an illegal pointer, or is a descriptor already passed to a previous invo- cation of fclose(). RETURN VALUE
Upon successful completion, 0 is returned. Otherwise, EOF is returned and errno is set to indicate the error. In either case, any further access (including another call to fclose()) to the stream results in undefined behavior. ERRORS
EBADF The file descriptor underlying stream is not valid. The fclose() function may also fail and set errno for any of the errors specified for the routines close(2), write(2), or fflush(3). ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+---------+ |Interface | Attribute | Value | +----------+---------------+---------+ |fclose() | Thread safety | MT-Safe | +----------+---------------+---------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C89, C99. NOTES
Note that fclose() flushes only the user-space buffers provided by the C library. To ensure that the data is physically stored on disk the kernel buffers must be flushed too, for example, with sync(2) or fsync(2). SEE ALSO
close(2), fcloseall(3), fflush(3), fileno(3), fopen(3), setbuf(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2016-12-12 FCLOSE(3)

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