mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/* Copyright (C) 1993,94,95,97,99,2002,2008 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 <errno.h>
|
|
#include <unistd.h>
|
|
#include <hurd.h>
|
|
#include <hurd/fd.h>
|
|
#include <string.h>
|
|
|
|
error_t
|
|
_hurd_fd_read (struct hurd_fd *fd, void *buf, size_t *nbytes, loff_t offset)
|
|
{
|
|
error_t err;
|
|
char *data;
|
|
mach_msg_type_number_t nread;
|
|
|
|
error_t readfd (io_t port)
|
|
{
|
|
return __io_read (port, &data, &nread, offset, *nbytes);
|
|
}
|
|
|
|
data = buf;
|
|
nread = *nbytes;
|
|
if (err = HURD_FD_PORT_USE (fd, _hurd_ctty_input (port, ctty, readfd)))
|
|
return err;
|
|
|
|
if (data != buf)
|
|
{
|
|
if (nread > *nbytes) /* Sanity check for bogus server. */
|
|
{
|
|
__vm_deallocate (__mach_task_self (), (vm_address_t) data, nread);
|
|
return EGRATUITOUS;
|
|
}
|
|
memcpy (buf, data, nread);
|
|
__vm_deallocate (__mach_task_self (), (vm_address_t) data, nread);
|
|
}
|
|
|
|
*nbytes = nread;
|
|
return 0;
|
|
}
|