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16edf865 WD |
1 | /* |
2 | * Extended attribute support for rsync. | |
3 | * | |
4 | * Copyright (C) 2004 Red Hat, Inc. | |
5 | * Written by Jay Fenlason. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8e41b68e WD |
8 | * it under the terms of the GNU General Public License as published by |
9 | * the Free Software Foundation; either version 3 of the License, or | |
10 | * (at your option) any later version. | |
16edf865 WD |
11 | * |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along | |
4fd842f9 | 18 | * with this program; if not, visit the http://fsf.org website. |
16edf865 WD |
19 | */ |
20 | ||
21 | #include "rsync.h" | |
22 | #include "sysxattrs.h" | |
23 | ||
24 | #ifdef SUPPORT_XATTRS | |
25 | ||
26 | #if defined HAVE_LINUX_XATTRS | |
27 | ||
28 | ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size) | |
29 | { | |
30 | return lgetxattr(path, name, value, size); | |
31 | } | |
32 | ||
33 | ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size) | |
34 | { | |
35 | return fgetxattr(filedes, name, value, size); | |
36 | } | |
37 | ||
38 | int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size) | |
39 | { | |
40 | return lsetxattr(path, name, value, size, 0); | |
41 | } | |
42 | ||
43 | int sys_lremovexattr(const char *path, const char *name) | |
44 | { | |
45 | return lremovexattr(path, name); | |
46 | } | |
47 | ||
48 | ssize_t sys_llistxattr(const char *path, char *list, size_t size) | |
49 | { | |
50 | return llistxattr(path, list, size); | |
51 | } | |
52 | ||
53 | #elif HAVE_OSX_XATTRS | |
54 | ||
55 | ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size) | |
56 | { | |
57 | return getxattr(path, name, value, size, 0, XATTR_NOFOLLOW); | |
58 | } | |
59 | ||
60 | ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size) | |
61 | { | |
62 | return fgetxattr(filedes, name, value, size, 0, 0); | |
63 | } | |
64 | ||
65 | int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size) | |
66 | { | |
67 | return setxattr(path, name, value, size, 0, XATTR_NOFOLLOW); | |
68 | } | |
69 | ||
70 | int sys_lremovexattr(const char *path, const char *name) | |
71 | { | |
72 | return removexattr(path, name, XATTR_NOFOLLOW); | |
73 | } | |
74 | ||
75 | ssize_t sys_llistxattr(const char *path, char *list, size_t size) | |
76 | { | |
77 | return listxattr(path, list, size, XATTR_NOFOLLOW); | |
78 | } | |
79 | ||
80 | #elif HAVE_FREEBSD_XATTRS | |
81 | ||
82 | ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size) | |
83 | { | |
84 | return extattr_get_link(path, EXTATTR_NAMESPACE_USER, name, value, size); | |
85 | } | |
86 | ||
87 | ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size) | |
88 | { | |
89 | return extattr_get_fd(filedes, EXTATTR_NAMESPACE_USER, name, value, size); | |
90 | } | |
91 | ||
92 | int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size) | |
93 | { | |
94 | return extattr_set_link(path, EXTATTR_NAMESPACE_USER, name, value, size); | |
95 | } | |
96 | ||
97 | int sys_lremovexattr(const char *path, const char *name) | |
98 | { | |
99 | return extattr_delete_link(path, EXTATTR_NAMESPACE_USER, name); | |
100 | } | |
101 | ||
102 | ssize_t sys_llistxattr(const char *path, char *list, size_t size) | |
103 | { | |
104 | unsigned char keylen; | |
105 | ssize_t off, len = extattr_list_link(path, EXTATTR_NAMESPACE_USER, list, size); | |
106 | ||
107 | if (len <= 0 || (size_t)len > size) | |
108 | return len; | |
109 | ||
110 | /* FreeBSD puts a single-byte length before each string, with no '\0' | |
111 | * terminator. We need to change this into a series of null-terminted | |
112 | * strings. Since the size is the same, we can simply transform the | |
113 | * output in place. */ | |
114 | for (off = 0; off < len; off += keylen + 1) { | |
115 | keylen = ((unsigned char*)list)[off]; | |
116 | if (off + keylen >= len) { | |
117 | /* Should be impossible, but kernel bugs happen! */ | |
118 | errno = EINVAL; | |
119 | return -1; | |
120 | } | |
121 | memmove(list+off, list+off+1, keylen); | |
122 | list[off+keylen] = '\0'; | |
123 | } | |
124 | ||
125 | return len; | |
126 | } | |
127 | ||
128 | #else | |
129 | ||
130 | #error You need to create xattr compatibility functions. | |
131 | ||
132 | #endif | |
133 | ||
134 | #endif /* SUPPORT_XATTRS */ |