fflush(3c) [opensolaris man page]

fflush(3C)						   Standard C Library Functions 						fflush(3C)

NAME

       fflush - flush a stream

SYNOPSIS

       #include <stdio.h>

       int fflush(FILE *stream);

DESCRIPTION

       If  stream  points  to an output stream or an update stream in which the most recent operation was not input, fflush() causes any unwritten
       data for that stream to be written to the file, and the st_ctime and st_mtime fields of the underlying file are marked for update.

       If stream points to an input stream or an update stream into which the most recent operation was input, that stream is  flushed	if  it	is
       seekable  and  is  not already at end-of-file.  Flushing an input stream discards any buffered input and adjusts the file pointer such that
       the next input operation accesses the byte after the last one read.  A stream is seekable if the underlying  file  is  not  a  pipe,  FIFO,
       socket, or TTY device.

       If stream is a null pointer, fflush() performs this flushing action on all streams for which the behavior is defined above.

       An input stream, seekable or non-seekable, can be flushed by explicitly calling fflush() with a non-null argument specifying that stream.

RETURN VALUES

       Upon successful completion, fflush() returns 0. Otherwise, it returns EOF and sets errno to indicate the error.

ERRORS

       The fflush() function will fail if:

       EAGAIN	 The O_NONBLOCK flag is set for the file descriptor underlying stream and the process would be delayed in the write operation.

       EBADF	 The file descriptor underlying stream is not valid.

       EFBIG	 An attempt was made to write a file that exceeds the maximum file size or the process's file size limit; or the file is a regular
		 file and an attempt was made to write at or beyond the offset maximum associated with the corresponding stream.

       EINTR	 The fflush() function was interrupted by a signal.

       EIO	 The process is a member of a background process group attempting to write to its controlling terminal, TOSTOP is set, the process
		 is neither ignoring nor blocking SIGTTOU, and the process group of the process is orphaned.

       ENOSPC	 There was no free space remaining on the device containing the file.

       EPIPE	 An  attempt is made to write to a pipe or FIFO that is not open for reading by any process. A SIGPIPE signal will also be sent to
		 the calling process.

       The fflush() function may fail if:

       ENXIO	A request was made of a non-existent device, or the request was beyond the limits of the device.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getrlimit(2), ulimit(2), attributes(5), standards(5)

SunOS 5.11							    1 Nov 2003								fflush(3C)

Check Out this Related Man Page

fclose(3S)																fclose(3S)

NAME

       fclose(), fflush(), fclose_unlocked(), fflush_unlocked() - close or flush a stream

SYNOPSIS

   Obsolescent Interfaces
DESCRIPTION

       causes any buffered data for the named stream to be written out, and the stream to be closed.  Buffers allocated by the standard input/out-
       put system may be freed.

       is performed automatically for all open files upon calling exit(2).

       If stream points to an output stream or an update stream in which the most recent operation was output, causes any buffered  data  for  the
       stream to be written to that file; otherwise any buffered data is discarded.  The stream remains open.

       If stream is a null pointer, performs this flushing action on all currently open streams.

   Obsolescent Interfaces
       and close or flush a stream.

RETURN VALUE

       Upon successful completion, and return 0.  Otherwise, they return EOF and set to indicate the error.

ERRORS

       If or fails, is set to one of:

	      The	flag is set for the file descriptor underlying stream and the process would be delayed in the write operation.

	      The file descriptor underlying
			stream is not valid.

	      An attempt was made to write a file
			that exceeds the process's file size limit or the maximum file size (see ulimit(2)).

	      or	was interrupted by a signal.

	      The process is in a background process group
			and  is  attempting to write to its controlling terminal, is set, the process is neither ignoring nor blocking the signal,
			and the process group of the process is orphaned.

	      There was no free space remaining on the device containing the file.

	      An attempt was made to write to a pipe
			that is not open for reading by any process.  A signal is also sent to the process.

       Additional values may be set by the underlying and functions (see write(2), lseek(2) and close(2)).

WARNINGS

       and are obsolescent interfaces supported only for compatibility with existing DCE applications.	New multithreaded applications should  use
       and

SEE ALSO

       close(2), exit(2), lseek(2), write(2), flockfile(3S), fopen(3S), setbuf(3S), thread_safety(5).

STANDARDS CONFORMANCE

																	fclose(3S)

Linux and UNIX Man Pages

fflush(3c) [opensolaris man page]

Check Out this Related Man Page