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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
       invocation 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

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