fclose


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 3.35 of the Linux  man-pages  project.   A
       description  of  the project, and information about reporting bugs, can
       be found at http://man7.org/linux/man-pages/.



GNU                               2009-02-23                         FCLOSE(3)
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