1 /* Create a symbolic link named relative to an open directory. Hurd version.
2 Copyright (C) 1991,1992,1993,1994,1995,1996,1997,2006
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
26 #include <hurd/paths.h>
31 /* Make a link to FROM called TO relative to FD. */
33 symlinkat (from, fd, to)
41 const size_t len = strlen (from) + 1;
42 char buf[sizeof (_HURD_SYMLINK) + len];
44 /* A symlink is a file whose translator is "/hurd/symlink\0target\0". */
46 memcpy (buf, _HURD_SYMLINK, sizeof (_HURD_SYMLINK));
47 memcpy (&buf[sizeof (_HURD_SYMLINK)], from, len);
49 dir = __file_name_split_at (fd, to, &name);
50 if (dir == MACH_PORT_NULL)
53 /* Create a new, unlinked node in the target directory. */
54 err = __dir_mkfile (dir, O_WRITE, 0777 & ~_hurd_umask, &node);
57 /* Set the node's translator to make it a symlink. */
58 err = __file_set_translator (node,
59 FS_TRANS_EXCL|FS_TRANS_SET,
60 FS_TRANS_EXCL|FS_TRANS_SET, 0,
61 buf, sizeof (_HURD_SYMLINK) + len,
62 MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND);
65 /* Link the node, now a valid symlink, into the target directory. */
66 err = __dir_link (dir, node, name, 1);
68 __mach_port_deallocate (__mach_task_self (), dir);
69 __mach_port_deallocate (__mach_task_self (), node);
72 return __hurd_fail (err);