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 invocation 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

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       found at https://www.kernel.org/doc/man-pages/.