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glibc  2.9
fd-write.c
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00001 /* _hurd_fd_write -- write to a file descriptor; handles job control et al.
00002    Copyright (C) 1993,94,95,97,99,2002 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <errno.h>
00021 #include <unistd.h>
00022 #include <hurd.h>
00023 #include <hurd/fd.h>
00024 
00025 error_t
00026 _hurd_fd_write (struct hurd_fd *fd,
00027               const void *buf, size_t *nbytes, loff_t offset)
00028 {
00029   error_t err;
00030   mach_msg_type_number_t wrote;
00031 
00032   error_t writefd (io_t port)
00033     {
00034       return __io_write (port, buf, *nbytes, offset, &wrote);
00035     }
00036 
00037   err = HURD_FD_PORT_USE (fd, _hurd_ctty_output (port, ctty, writefd));
00038 
00039   if (! err)
00040     *nbytes = wrote;
00041 
00042   return err;
00043 }