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