newlib/libc/stdio/fcloseall.c

   1 /*
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that the above copyright notice and this paragraph are
   7  * duplicated in all such forms and that any documentation,
   8  * and/or other materials related to such
   9  * distribution and use acknowledge that the software was developed
  10  * by the University of California, Berkeley.  The name of the
  11  * University may not be used to endorse or promote products derived
  12  * from this software without specific prior written permission.
  13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16  */
  17
  18 /*
  19 FUNCTION
  20 <<fcloseall>>---close all files
  21
  22 INDEX
  23         fcloseall
  24 INDEX
  25         _fcloseall_r
  26
  27 SYNOPSIS
  28         #include <stdio.h>
  29         int fcloseall(void);
  30         int _fcloseall_r (struct _reent *<[ptr]>);
  31
  32 DESCRIPTION
  33 <<fcloseall>> closes all files in the current reentrancy struct's domain.
  34 The function <<_fcloseall_r>> is the same function, except the reentrancy
  35 struct is passed in as the <[ptr]> argument.
  36
  37 This function is not recommended as it closes all streams, including
  38 the std streams.
  39
  40 RETURNS
  41 <<fclose>> returns <<0>> if all closes are successful.  Otherwise,
  42 EOF is returned.
  43
  44 PORTABILITY
  45 <<fcloseall>> is a glibc extension.
  46
  47 Required OS subroutines: <<close>>, <<fstat>>, <<isatty>>, <<lseek>>,
  48 <<read>>, <<sbrk>>, <<write>>.
  49 */
  50 /* This file based upon fwalk.c. */
  51
  52 #include <_ansi.h>
  53 #include <reent.h>
  54 #include <stdio.h>
  55 #include <stdlib.h>
  56 #include <errno.h>
  57 #include "local.h"
  58
  59 int
  60 _fcloseall_r (struct _reent *ptr)
  61 {
  62   /* There are no thread-specific FILE objects */
  63   return 0;
  64 }
  65
  66 #ifndef _REENT_ONLY
  67
  68 int
  69 fcloseall (void)
  70 {
  71   return _fwalk_sglue (_GLOBAL_REENT, _fclose_r, &__sglue);
  72 }
  73
  74 #endif