sysdeps/standalone/close.c

   1 /* Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
   2    Ported to standalone by Joel Sherrill jsherril@redstone-emh2.army.mil,
   3      On-Line Applications Research Corporation.
   4
   5 This file is part of the GNU C Library.
   6
   7 The GNU C Library is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU Library General Public License as
   9 published by the Free Software Foundation; either version 2 of the
  10 License, or (at your option) any later version.
  11
  12 The GNU C Library is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 Library General Public License for more details.
  16
  17 You should have received a copy of the GNU Library General Public
  18 License along with the GNU C Library; see the file COPYING.LIB.  If
  19 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  20 Cambridge, MA 02139, USA.  */
  21
  22 #include <errno.h>
  23 #include <unistd.h>
  24
  25 #include <stdio_lim.h>
  26 #include "filedesc.h"
  27
  28 /* Close the file descriptor FD.  */
  29 int
  30 __close (fd)
  31      int fd;
  32 {
  33   if ( !__FD_Is_valid( fd ) || !__FD_Table[ fd ].in_use )
  34     {
  35       __set_errno (EBADF);
  36       return -1;
  37     }
  38
  39   __FD_Table[ fd ].in_use = 0;
  40   return 0;
  41 }
  42
  43
  44 weak_alias (__close, close)