| 0,0 → 1,119 |
|---|
| /* |
| * Copyright (c) 1990 The Regents of the University of California. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms are permitted |
| * provided that the above copyright notice and this paragraph are |
| * duplicated in all such forms and that any documentation, |
| * advertising materials, and other materials related to such |
| * distribution and use acknowledge that the software was developed |
| * by the University of California, Berkeley. The name of the |
| * University may not be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| |
| /* |
| FUNCTION |
| <<fclose>>---close a file |
| |
| INDEX |
| fclose |
| INDEX |
| _fclose_r |
| |
| ANSI_SYNOPSIS |
| #include <stdio.h> |
| int fclose(FILE *<[fp]>); |
| int _fclose_r(struct _reent *<[reent]>, FILE *<[fp]>); |
| |
| TRAD_SYNOPSIS |
| #include <stdio.h> |
| int fclose(<[fp]>) |
| FILE *<[fp]>; |
| |
| int fclose(<[fp]>) |
| struct _reent *<[reent]> |
| FILE *<[fp]>; |
| |
| DESCRIPTION |
| If the file or stream identified by <[fp]> is open, <<fclose>> closes |
| it, after first ensuring that any pending data is written (by calling |
| <<fflush(<[fp]>)>>). |
| |
| The alternate function <<_fclose_r>> is a reentrant version. |
| The extra argument <[reent]> is a pointer to a reentrancy structure. |
| |
| RETURNS |
| <<fclose>> returns <<0>> if successful (including when <[fp]> is |
| <<NULL>> or not an open file); otherwise, it returns <<EOF>>. |
| |
| PORTABILITY |
| <<fclose>> is required by ANSI C. |
| |
| Required OS subroutines: <<close>>, <<fstat>>, <<isatty>>, <<lseek>>, |
| <<read>>, <<sbrk>>, <<write>>. |
| */ |
| |
| #include <_ansi.h> |
| #include <reent.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/lock.h> |
| #include "local.h" |
| |
| int |
| _DEFUN(_fclose_r, (rptr, fp), |
| struct _reent *rptr _AND |
| register FILE * fp) |
| { |
| int r; |
| |
| if (fp == NULL) |
| return (0); /* on NULL */ |
| |
| CHECK_INIT (rptr, fp); |
| |
| _flockfile (fp); |
| |
| if (fp->_flags == 0) /* not open! */ |
| { |
| _funlockfile (fp); |
| return (0); |
| } |
| /* Unconditionally flush to allow special handling for seekable read |
| files to reposition file to last byte processed as opposed to |
| last byte read ahead into the buffer. */ |
| r = _fflush_r (rptr, fp); |
| if (fp->_close != NULL && fp->_close (rptr, fp->_cookie) < 0) |
| r = EOF; |
| if (fp->_flags & __SMBF) |
| _free_r (rptr, (char *) fp->_bf._base); |
| if (HASUB (fp)) |
| FREEUB (rptr, fp); |
| if (HASLB (fp)) |
| FREELB (rptr, fp); |
| __sfp_lock_acquire (); |
| fp->_flags = 0; /* release this FILE for reuse */ |
| _funlockfile (fp); |
| #ifndef __SINGLE_THREAD__ |
| __lock_close_recursive (fp->_lock); |
| #endif |
| |
| __sfp_lock_release (); |
| |
| return (r); |
| } |
| |
| #ifndef _REENT_ONLY |
| |
| int |
| _DEFUN(fclose, (fp), |
| register FILE * fp) |
| { |
| return _fclose_r(_REENT, fp); |
| } |
| |
| #endif |