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)