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16edf865 WD |
1 | /* |
2 | * Extended attribute support for rsync. | |
3 | * | |
4 | * Copyright (C) 2004 Red Hat, Inc. | |
d3d07a5e | 5 | * Copyright (C) 2003-2008 Wayne Davison |
16edf865 WD |
6 | * Written by Jay Fenlason. |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
8e41b68e WD |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 3 of the License, or | |
11 | * (at your option) any later version. | |
16edf865 WD |
12 | * |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
4fd842f9 | 19 | * with this program; if not, visit the http://fsf.org website. |
16edf865 WD |
20 | */ |
21 | ||
22 | #include "rsync.h" | |
23 | #include "sysxattrs.h" | |
24 | ||
25 | #ifdef SUPPORT_XATTRS | |
26 | ||
27 | #if defined HAVE_LINUX_XATTRS | |
28 | ||
29 | ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size) | |
30 | { | |
31 | return lgetxattr(path, name, value, size); | |
32 | } | |
33 | ||
34 | ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size) | |
35 | { | |
36 | return fgetxattr(filedes, name, value, size); | |
37 | } | |
38 | ||
39 | int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size) | |
40 | { | |
41 | return lsetxattr(path, name, value, size, 0); | |
42 | } | |
43 | ||
44 | int sys_lremovexattr(const char *path, const char *name) | |
45 | { | |
46 | return lremovexattr(path, name); | |
47 | } | |
48 | ||
49 | ssize_t sys_llistxattr(const char *path, char *list, size_t size) | |
50 | { | |
51 | return llistxattr(path, list, size); | |
52 | } | |
53 | ||
54 | #elif HAVE_OSX_XATTRS | |
55 | ||
56 | ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size) | |
57 | { | |
58 | return getxattr(path, name, value, size, 0, XATTR_NOFOLLOW); | |
59 | } | |
60 | ||
61 | ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size) | |
62 | { | |
63 | return fgetxattr(filedes, name, value, size, 0, 0); | |
64 | } | |
65 | ||
66 | int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size) | |
67 | { | |
68 | return setxattr(path, name, value, size, 0, XATTR_NOFOLLOW); | |
69 | } | |
70 | ||
71 | int sys_lremovexattr(const char *path, const char *name) | |
72 | { | |
73 | return removexattr(path, name, XATTR_NOFOLLOW); | |
74 | } | |
75 | ||
76 | ssize_t sys_llistxattr(const char *path, char *list, size_t size) | |
77 | { | |
78 | return listxattr(path, list, size, XATTR_NOFOLLOW); | |
79 | } | |
80 | ||
81 | #elif HAVE_FREEBSD_XATTRS | |
82 | ||
83 | ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size) | |
84 | { | |
85 | return extattr_get_link(path, EXTATTR_NAMESPACE_USER, name, value, size); | |
86 | } | |
87 | ||
88 | ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size) | |
89 | { | |
90 | return extattr_get_fd(filedes, EXTATTR_NAMESPACE_USER, name, value, size); | |
91 | } | |
92 | ||
93 | int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size) | |
94 | { | |
95 | return extattr_set_link(path, EXTATTR_NAMESPACE_USER, name, value, size); | |
96 | } | |
97 | ||
98 | int sys_lremovexattr(const char *path, const char *name) | |
99 | { | |
100 | return extattr_delete_link(path, EXTATTR_NAMESPACE_USER, name); | |
101 | } | |
102 | ||
103 | ssize_t sys_llistxattr(const char *path, char *list, size_t size) | |
104 | { | |
105 | unsigned char keylen; | |
106 | ssize_t off, len = extattr_list_link(path, EXTATTR_NAMESPACE_USER, list, size); | |
107 | ||
108 | if (len <= 0 || (size_t)len > size) | |
109 | return len; | |
110 | ||
111 | /* FreeBSD puts a single-byte length before each string, with no '\0' | |
112 | * terminator. We need to change this into a series of null-terminted | |
113 | * strings. Since the size is the same, we can simply transform the | |
114 | * output in place. */ | |
115 | for (off = 0; off < len; off += keylen + 1) { | |
116 | keylen = ((unsigned char*)list)[off]; | |
117 | if (off + keylen >= len) { | |
118 | /* Should be impossible, but kernel bugs happen! */ | |
119 | errno = EINVAL; | |
120 | return -1; | |
121 | } | |
122 | memmove(list+off, list+off+1, keylen); | |
123 | list[off+keylen] = '\0'; | |
124 | } | |
125 | ||
126 | return len; | |
127 | } | |
128 | ||
129 | #else | |
130 | ||
131 | #error You need to create xattr compatibility functions. | |
132 | ||
133 | #endif | |
134 | ||
135 | #endif /* SUPPORT_XATTRS */ |