Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
FFLUSH(3)		   Linux Programmer's Manual		     FFLUSH(3)

NAME
       fflush -	flush a	stream

SYNOPSIS
       #include	<stdio.h>

       int fflush(FILE *stream);

DESCRIPTION
       The  function fflush forces a write of all user-space buffered data for
       the given output	or update stream via  the  stream's  underlying	 write
       function.  The open status of the stream	is unaffected.

       If the stream argument is NULL, fflush flushes all open output streams.

       For a non-locking counterpart, see unlocked_stdio(3).

RETURN VALUE
       Upon successful completion 0 is returned.  Otherwise, EOF  is  returned
       and the global variable errno is	set to indicate	the error.

ERRORS
       EBADF  Stream is	not an open stream, or is not open for writing.

       The  function  fflush may also fail and set errno for any of the	errors
       specified for the routine write(2).

NOTES
       Note that fflush() 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, e.g.	with sync(2) or	fsync(2).

CONFORMING TO
       The function fflush() conforms to ANSI X3.159-1989 (``ANSI C'').

SEE ALSO
       fsync(2),   sync(2),   write(2),	  fclose(3),   fopen(3),    setbuf(3),
       unlocked_stdio(3)

BSD MANPAGE			  1993-11-29			     FFLUSH(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | NOTES | CONFORMING TO | SEE ALSO

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=fflush&sektion=3&manpath=Red+Hat+Linux%2fi386+9>

home | help