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/* Lookup helper function for Hurd implementation of *at functions.
Copyright (C) 2006-2017 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 <hurd.h>
#include <hurd/lookup.h>
#include <hurd/fd.h>
#include <string.h>
#include <fcntl.h>
file_t
__file_name_lookup_at (int fd, int at_flags,
const char *file_name, int flags, mode_t mode)
{
error_t err;
file_t result;
if ((at_flags & AT_SYMLINK_FOLLOW) && (at_flags & AT_SYMLINK_NOFOLLOW))
return (__hurd_fail (EINVAL), MACH_PORT_NULL);
flags |= (at_flags & AT_SYMLINK_NOFOLLOW) ? O_NOLINK : 0;
at_flags &= ~AT_SYMLINK_NOFOLLOW;
if (at_flags & AT_SYMLINK_FOLLOW)
flags &= ~O_NOLINK;
at_flags &= ~AT_SYMLINK_FOLLOW;
if (at_flags != 0)
return (__hurd_fail (EINVAL), MACH_PORT_NULL);
if (fd == AT_FDCWD || file_name[0] == '/')
return __file_name_lookup (file_name, flags, mode);
file_t startdir;
error_t use_init_port (int which, error_t (*operate) (mach_port_t))
{
return (which == INIT_PORT_CWDIR ? (*operate) (startdir) :
_hurd_ports_use (which, operate));
}
err = HURD_DPORT_USE (fd, (startdir = port,
__hurd_file_name_lookup (&use_init_port,
&__getdport, NULL,
file_name,
flags,
mode & ~_hurd_umask,
&result)));
return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result;
}
file_t
__file_name_split_at (int fd, const char *file_name, char **name)
{
error_t err;
file_t result;
if (fd == AT_FDCWD || file_name[0] == '/')
return __file_name_split (file_name, name);
err = __hurd_file_name_split (&_hurd_ports_use, &__getdport, 0,
file_name, &result, name);
file_t startdir;
error_t use_init_port (int which, error_t (*operate) (mach_port_t))
{
return (which == INIT_PORT_CWDIR ? (*operate) (startdir) :
_hurd_ports_use (which, operate));
}
err = HURD_DPORT_USE (fd, (startdir = port,
__hurd_file_name_split (&use_init_port,
&__getdport, 0,
file_name,
&result, name)));
return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result;
}
file_t
__directory_name_split_at (int fd, const char *directory_name, char **name)
{
error_t err;
file_t result;
if (fd == AT_FDCWD || directory_name[0] == '/')
return __directory_name_split (directory_name, name);
file_t startdir;
error_t use_init_port (int which, error_t (*operate) (mach_port_t))
{
return (which == INIT_PORT_CWDIR ? (*operate) (startdir) :
_hurd_ports_use (which, operate));
}
err = HURD_DPORT_USE (fd, (startdir = port,
__hurd_directory_name_split (&use_init_port,
&__getdport, 0,
directory_name,
&result, name)));
return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result;
}
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