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Linux 2.6 - man page for fclose (linux section 3)

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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.

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 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 3.55 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)
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