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/* Test for access to file, relative to open directory. Hurd version.
Copyright (C) 2006-2015 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 <fcntl.h>
#include <stddef.h>
#include <unistd.h>
#include <sys/types.h>
#include <hurd.h>
#include <hurd/fd.h>
int
faccessat (int fd, const char *file, int type, int flag)
{
error_t err;
file_t port;
int allowed, flags;
if ((flag & AT_EACCESS) == 0)
{
if (fd == AT_FDCWD || file[0] == '/')
return __access (file, type);
__set_errno (ENOTSUP); /* XXX later */
return -1;
}
port = __file_name_lookup_at (fd, flag &~ AT_EACCESS, file, 0, 0);
if (port == MACH_PORT_NULL)
return -1;
/* Find out what types of access we are allowed to this file. */
err = __file_check_access (port, &allowed);
__mach_port_deallocate (__mach_task_self (), port);
if (err)
return __hurd_fail (err);
flags = 0;
if (type & R_OK)
flags |= O_READ;
if (type & W_OK)
flags |= O_WRITE;
if (type & X_OK)
flags |= O_EXEC;
if (flags & ~allowed)
/* We are not allowed all the requested types of access. */
return __hurd_fail (EACCES);
return 0;
}
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