1 | /* Lookup helper function for Hurd implementation of *at functions. |
2 | Copyright (C) 2006-2022 Free Software Foundation, Inc. |
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 |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
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 | int empty = at_flags & AT_EMPTY_PATH; |
32 | |
33 | at_flags &= ~AT_EMPTY_PATH; |
34 | |
35 | err = __hurd_at_flags (&at_flags, &flags); |
36 | if (err) |
37 | return (__hurd_fail (err), MACH_PORT_NULL); |
38 | |
39 | if (fd == AT_FDCWD || file_name[0] == '/') |
40 | return __file_name_lookup (file_name, flags, mode); |
41 | |
42 | if (empty != 0 && file_name[0] == '\0') |
43 | { |
44 | enum retry_type doretry; |
45 | char retryname[1024]; /* XXX string_t LOSES! */ |
46 | |
47 | err = HURD_DPORT_USE (fd, __dir_lookup (port, "" , flags, mode, |
48 | &doretry, retryname, |
49 | &result)); |
50 | |
51 | if (! err) |
52 | err = __hurd_file_name_lookup_retry (&_hurd_ports_use, &__getdport, |
53 | NULL, doretry, retryname, |
54 | flags, mode, &result); |
55 | |
56 | return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result; |
57 | } |
58 | |
59 | file_t startdir; |
60 | error_t use_init_port (int which, error_t (*operate) (mach_port_t)) |
61 | { |
62 | return (which == INIT_PORT_CWDIR ? (*operate) (startdir) |
63 | : _hurd_ports_use (which, operate)); |
64 | } |
65 | |
66 | err = HURD_DPORT_USE (fd, (startdir = port, |
67 | __hurd_file_name_lookup (&use_init_port, |
68 | &__getdport, NULL, |
69 | file_name, |
70 | flags, |
71 | mode & ~_hurd_umask, |
72 | &result))); |
73 | |
74 | return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result; |
75 | } |
76 | |
77 | file_t |
78 | __file_name_split_at (int fd, const char *file_name, char **name) |
79 | { |
80 | error_t err; |
81 | file_t result; |
82 | |
83 | if (fd == AT_FDCWD || file_name[0] == '/') |
84 | return __file_name_split (file_name, name); |
85 | |
86 | err = __hurd_file_name_split (&_hurd_ports_use, &__getdport, 0, |
87 | file_name, &result, name); |
88 | |
89 | file_t startdir; |
90 | error_t use_init_port (int which, error_t (*operate) (mach_port_t)) |
91 | { |
92 | return (which == INIT_PORT_CWDIR ? (*operate) (startdir) |
93 | : _hurd_ports_use (which, operate)); |
94 | } |
95 | |
96 | err = HURD_DPORT_USE (fd, (startdir = port, |
97 | __hurd_file_name_split (&use_init_port, |
98 | &__getdport, 0, |
99 | file_name, |
100 | &result, name))); |
101 | |
102 | return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result; |
103 | } |
104 | |
105 | file_t |
106 | __directory_name_split_at (int fd, const char *directory_name, char **name) |
107 | { |
108 | error_t err; |
109 | file_t result; |
110 | |
111 | if (fd == AT_FDCWD || directory_name[0] == '/') |
112 | return __directory_name_split (directory_name, name); |
113 | |
114 | file_t startdir; |
115 | error_t use_init_port (int which, error_t (*operate) (mach_port_t)) |
116 | { |
117 | return (which == INIT_PORT_CWDIR ? (*operate) (startdir) |
118 | : _hurd_ports_use (which, operate)); |
119 | } |
120 | |
121 | err = HURD_DPORT_USE (fd, (startdir = port, |
122 | __hurd_directory_name_split (&use_init_port, |
123 | &__getdport, 0, |
124 | directory_name, |
125 | &result, name))); |
126 | |
127 | return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result; |
128 | } |
129 | |