1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
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. |
8 | |
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. |
13 | |
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 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <stddef.h> |
20 | #include <unistd.h> |
21 | #include <hurd.h> |
22 | |
23 | /* Make a link to FROM called TO. */ |
24 | int |
25 | __link (const char *from, const char *to) |
26 | { |
27 | error_t err; |
28 | file_t oldfile, linknode, todir; |
29 | char *toname; |
30 | |
31 | oldfile = __file_name_lookup (from, 0, 0); |
32 | if (oldfile == MACH_PORT_NULL) |
33 | return -1; |
34 | |
35 | /* The file_getlinknode RPC returns the port that should be passed to |
36 | the receiving filesystem (the one containing TODIR) in dir_link. */ |
37 | |
38 | err = __file_getlinknode (oldfile, &linknode); |
39 | __mach_port_deallocate (__mach_task_self (), oldfile); |
40 | if (err) |
41 | return __hurd_fail (err); |
42 | |
43 | todir = __file_name_split (to, &toname); |
44 | if (todir != MACH_PORT_NULL) |
45 | { |
46 | err = __dir_link (todir, linknode, toname, 1); |
47 | __mach_port_deallocate (__mach_task_self (), todir); |
48 | } |
49 | __mach_port_deallocate (__mach_task_self (), linknode); |
50 | if (todir == MACH_PORT_NULL) |
51 | return -1; |
52 | |
53 | if (err) |
54 | return __hurd_fail (err); |
55 | return 0; |
56 | } |
57 | |
58 | weak_alias (__link, link) |
59 | |