fclose.3s

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 3S 代码 · 共 52 行

.\" SCCSID: @(#)fclose.3s	8.1	9/11/90
.TH fclose 3s 
.SH Name
fclose, fflush \- close or flush a stream
.SH Syntax
#include <stdio.h>
.PP
fclose\^(\fIstream\fP)
.br
FILE *\fIstream\fP;
.PP
fflush\^(\fIstream\fP)
.br
FILE *\fIstream\fP;
.SH Description
.NXR "fclose subroutine"
.NXR "fflush subroutine"
.NXR "stream" "closing"
.NXR "stream" "flushing"
The
.PN fclose
routine causes any buffers for the named
.I stream
to be emptied, and the file to be closed.
Buffers allocated by the standard input/output system
are freed.  The
.PN fclose
routine is performed automatically upon
calling
.PN exit .
.PP
The
.PN fflush
routine causes any buffered data for the named output
.I stream
to be written to that file.  If 
.I stream
is NULL, all open output streams are flushed.  The stream remains open.
.SH Diagnostics
These functions return EOF if buffered data cannot be transferred to an
output stream.
.SH Environment
If not called in POSIX mode, these functions return EOF if 
.I stream
is not associated with an output file.  In POSIX mode, if
.I stream
is associated with an input file, the file pointer is positioned
following the last byte read from that
.I stream.
.SH See Also
close(2), fopen(3s), setbuf(3s)