io/write.c

   1 /* Copyright (C) 1991, 1995, 1996, 1997, 2002 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <sysdep.h>
  20 #include <errno.h>
  21 #include <unistd.h>
  22 #include <stddef.h>
  23
  24 /* Write NBYTES of BUF to FD.  Return the number written, or -1.  */
  25 ssize_t
  26 __libc_write (int fd, const void *buf, size_t nbytes)
  27 {
  28   if (nbytes == 0)
  29     return 0;
  30   if (fd < 0)
  31     {
  32       __set_errno (EBADF);
  33       return -1;
  34     }
  35   if (buf == NULL)
  36     {
  37       __set_errno (EINVAL);
  38       return -1;
  39     }
  40
  41   __set_errno (ENOSYS);
  42   return -1;
  43 }
  44 libc_hidden_def (__libc_write)
  45 stub_warning (write)
  46
  47 weak_alias (__libc_write, __write)
  48 libc_hidden_weak (__write)
  49 weak_alias (__libc_write, write)
  50 #include <stub-tag.h>