| 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 |
| 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. |
| 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 |
| 18 | * with this program; if not, visit the http://fsf.org website. |
| 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 */ |