sysdeps/stub/read.c

   1 /* Copyright (C) 1991, 1995 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <errno.h>
  21 #include <unistd.h>
  22 #include <stddef.h>
  23
  24 /* Read NBYTES into BUF from FD.  Return the number read or -1.  */
  25 ssize_t
  26 DEFUN(__read, (fd, buf, nbytes),
  27       int fd AND PTR buf AND size_t nbytes)
  28 {
  29   if (nbytes == 0)
  30     return 0;
  31   if (fd < 0)
  32     {
  33       errno = EBADF;
  34       return -1;
  35     }
  36   if (buf == NULL)
  37     {
  38       errno = EINVAL;
  39       return -1;
  40     }
  41
  42   errno = ENOSYS;
  43   return -1;
  44 }
  45 stub_warning (read)
  46
  47 weak_alias (__read, read)