fclose(3S)           STANDARD I/O FUNCTIONS            fclose(3S)



NAME
     fclose, fflush - close or flush a stream

SYNOPSIS
     #include <stdio.h>

     int fclose (FILE *stream);

     int fflush (FILE *stream);

DESCRIPTION
     fclose causes any buffered data waiting to  be  written  for
     the  named  stream [see intro(3)] to be written out, and the
     stream to be closed.  If the underlying file pointer is  not
     already at end of file, and the file is one capable of seek-
     ing, the file pointer is adjusted so that the next operation
     on  the open file pointer deals with the byte after the last
     one read from or written to the file being closed.

     fclose is performed automatically for all  open  files  upon
     calling exit.

     If stream points to an output stream or an update stream  on
     which the most recent operation was not input, fflush causes
     any buffered data waiting to be written for the named stream
     to  be  written  to  that file.  Any unread data buffered in
     stream is discarded.  The stream remains open.  If stream is
     open for reading, the underlying file pointer is not already
     at end of file, and the file is one capable of seeking,  the
     file  pointer  is adjusted so that the next operation on the
     open file pointer deals with the byte  after  the  last  one
     read from or written to the stream.

     When calling fflush, if stream is a null pointer, all  files
     open for writing are flushed.

SEE ALSO
     close(2),   exit(2),   intro(3),   fopen(3S),    setbuf(3S),
     stdio(3S).

DIAGNOSTICS
     Upon successful completion these functions return a value of
     zero. Otherwise EOF is returned.












          Last change: C Programming Language Utilities         1