sysdeps/standalone/close.c

   1 /* Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
   2    Ported to standalone by Joel Sherrill jsherril@redstone-emh2.army.mil,
   3      On-Line Applications Research Corporation.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <errno.h>
  22 #include <unistd.h>
  23
  24 #define _STDIO_H
  25 #include <bits/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)