1 /* Copyright (C) 1991-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
21 #include <hurd/paths.h>
24 /* Make a link to FROM called TO. */
33 const size_t len
= strlen (from
) + 1;
34 char buf
[sizeof (_HURD_SYMLINK
) + len
];
36 /* A symlink is a file whose translator is "/hurd/symlink\0target\0". */
38 memcpy (buf
, _HURD_SYMLINK
, sizeof (_HURD_SYMLINK
));
39 memcpy (&buf
[sizeof (_HURD_SYMLINK
)], from
, len
);
41 dir
= __file_name_split (to
, &name
);
42 if (dir
== MACH_PORT_NULL
)
45 /* Create a new, unlinked node in the target directory. */
46 err
= __dir_mkfile (dir
, O_WRITE
, 0777 & ~_hurd_umask
, &node
);
50 /* Set the node's translator to make it a symlink. */
51 err
= __file_set_translator (node
,
52 FS_TRANS_EXCL
|FS_TRANS_SET
,
53 FS_TRANS_EXCL
|FS_TRANS_SET
, 0,
54 buf
, sizeof (_HURD_SYMLINK
) + len
,
55 MACH_PORT_NULL
, MACH_MSG_TYPE_COPY_SEND
);
58 /* Link the node, now a valid symlink, into the target directory. */
59 err
= __dir_link (dir
, node
, name
, 1);
61 __mach_port_deallocate (__mach_task_self (), node
);
64 __mach_port_deallocate (__mach_task_self (), dir
);
67 return __hurd_fail (err
);
71 weak_alias (__symlink
, symlink
)