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16a10468 | 1 | /* Lookup helper function for Hurd implementation of *at functions. |
f7a9f785 | 2 | Copyright (C) 2006-2016 Free Software Foundation, Inc. |
16a10468 RM |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
16a10468 RM |
18 | |
19 | #include <hurd.h> | |
20 | #include <hurd/lookup.h> | |
21 | #include <hurd/fd.h> | |
22 | #include <string.h> | |
23 | #include <fcntl.h> | |
24 | ||
25 | file_t | |
26 | __file_name_lookup_at (int fd, int at_flags, | |
27 | const char *file_name, int flags, mode_t mode) | |
28 | { | |
29 | error_t err; | |
30 | file_t result; | |
31 | ||
2a50c078 EPM |
32 | if ((at_flags & AT_SYMLINK_FOLLOW) && (at_flags & AT_SYMLINK_NOFOLLOW)) |
33 | return (__hurd_fail (EINVAL), MACH_PORT_NULL); | |
34 | ||
16a10468 RM |
35 | flags |= (at_flags & AT_SYMLINK_NOFOLLOW) ? O_NOLINK : 0; |
36 | at_flags &= ~AT_SYMLINK_NOFOLLOW; | |
2a50c078 EPM |
37 | if (at_flags & AT_SYMLINK_FOLLOW) |
38 | flags &= ~O_NOLINK; | |
39 | at_flags &= ~AT_SYMLINK_FOLLOW; | |
16a10468 | 40 | if (at_flags != 0) |
67481400 | 41 | return (__hurd_fail (EINVAL), MACH_PORT_NULL); |
16a10468 RM |
42 | |
43 | if (fd == AT_FDCWD || file_name[0] == '/') | |
44 | return __file_name_lookup (file_name, flags, mode); | |
45 | ||
46 | file_t startdir; | |
47 | error_t use_init_port (int which, error_t (*operate) (mach_port_t)) | |
48 | { | |
49 | return (which == INIT_PORT_CWDIR ? (*operate) (startdir) : | |
50 | _hurd_ports_use (which, operate)); | |
51 | } | |
52 | ||
53 | err = HURD_DPORT_USE (fd, (startdir = port, | |
54 | __hurd_file_name_lookup (&use_init_port, | |
55 | &__getdport, NULL, | |
56 | file_name, | |
57 | flags, | |
58 | mode & ~_hurd_umask, | |
59 | &result))); | |
60 | ||
61 | return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result; | |
62 | } | |
63 | ||
64 | file_t | |
65 | __file_name_split_at (int fd, const char *file_name, char **name) | |
66 | { | |
67 | error_t err; | |
68 | file_t result; | |
69 | ||
70 | if (fd == AT_FDCWD || file_name[0] == '/') | |
71 | return __file_name_split (file_name, name); | |
72 | ||
73 | err = __hurd_file_name_split (&_hurd_ports_use, &__getdport, 0, | |
74 | file_name, &result, name); | |
75 | ||
76 | file_t startdir; | |
77 | error_t use_init_port (int which, error_t (*operate) (mach_port_t)) | |
78 | { | |
79 | return (which == INIT_PORT_CWDIR ? (*operate) (startdir) : | |
80 | _hurd_ports_use (which, operate)); | |
81 | } | |
82 | ||
83 | err = HURD_DPORT_USE (fd, (startdir = port, | |
84 | __hurd_file_name_split (&use_init_port, | |
85 | &__getdport, 0, | |
86 | file_name, | |
87 | &result, name))); | |
88 | ||
89 | return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result; | |
90 | } | |
91 | ||
92 | file_t | |
93 | __directory_name_split_at (int fd, const char *directory_name, char **name) | |
94 | { | |
95 | error_t err; | |
96 | file_t result; | |
97 | ||
98 | if (fd == AT_FDCWD || directory_name[0] == '/') | |
99 | return __directory_name_split (directory_name, name); | |
100 | ||
101 | file_t startdir; | |
102 | error_t use_init_port (int which, error_t (*operate) (mach_port_t)) | |
103 | { | |
104 | return (which == INIT_PORT_CWDIR ? (*operate) (startdir) : | |
105 | _hurd_ports_use (which, operate)); | |
106 | } | |
107 | ||
108 | err = HURD_DPORT_USE (fd, (startdir = port, | |
109 | __hurd_directory_name_split (&use_init_port, | |
110 | &__getdport, 0, | |
111 | directory_name, | |
112 | &result, name))); | |
113 | ||
114 | return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result; | |
115 | } |