|  | /* Copyright (C) 1991-2016 Free Software Foundation, Inc. | 
|  | This file is part of the GNU C Library. | 
|  |  | 
|  | The GNU C Library is free software; you can redistribute it and/or | 
|  | modify it under the terms of the GNU Lesser General Public | 
|  | License as published by the Free Software Foundation; either | 
|  | version 2.1 of the License, or (at your option) any later version. | 
|  |  | 
|  | The GNU C Library is distributed in the hope that it will be useful, | 
|  | but WITHOUT ANY WARRANTY; without even the implied warranty of | 
|  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU | 
|  | Lesser General Public License for more details. | 
|  |  | 
|  | You should have received a copy of the GNU Lesser General Public | 
|  | License along with the GNU C Library; if not, see | 
|  | <http://www.gnu.org/licenses/>.  */ | 
|  |  | 
|  | #include <sysdep.h> | 
|  | #include <errno.h> | 
|  | #include <unistd.h> | 
|  | #include <stddef.h> | 
|  |  | 
|  | /* Write NBYTES of BUF to FD.  Return the number written, or -1.  */ | 
|  | ssize_t | 
|  | __libc_write (int fd, const void *buf, size_t nbytes) | 
|  | { | 
|  | if (nbytes == 0) | 
|  | return 0; | 
|  | if (fd < 0) | 
|  | { | 
|  | __set_errno (EBADF); | 
|  | return -1; | 
|  | } | 
|  | if (buf == NULL) | 
|  | { | 
|  | __set_errno (EINVAL); | 
|  | return -1; | 
|  | } | 
|  |  | 
|  | __set_errno (ENOSYS); | 
|  | return -1; | 
|  | } | 
|  | libc_hidden_def (__libc_write) | 
|  | stub_warning (write) | 
|  |  | 
|  | weak_alias (__libc_write, __write) | 
|  | libc_hidden_weak (__write) | 
|  | weak_alias (__libc_write, write) |