2 Copyright (c) 2009 Frank Lahm <franklahm@gmail.com>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
23 #include <attr/xattr.h>
24 #elif HAVE_SYS_XATTR_H
25 #include <sys/xattr.h>
32 #ifdef HAVE_SYS_EXTATTR_H
33 #include <sys/extattr.h>
36 #ifdef HAVE_SOLARIS_ACLS
41 #define ENOATTR ENODATA
44 #include <atalk/vfs.h>
47 * This seems to be the current limit fo HFS+, we arbitrarily force that
48 * which also safes us from buffer overflows
50 #define MAX_EA_SIZE 3802
53 * At time of writing the 10.5.6 client adds 8 bytes to the
54 * length of the EA that we send him
56 #define MAX_REPLY_EXTRA_BYTES 8
59 * Library user must provide a static buffer of size ATTRNAMEBUFSIZ.
60 * It's used when listing EAs as intermediate buffer. For afpd it's
61 * defined in extattrs.c.
63 #define ATTRNAMEBUFSIZ 4096
71 #if !defined(HAVE_SETXATTR)
72 #define XATTR_CREATE 0x1 /* set value, fail if attr already exists */
73 #define XATTR_REPLACE 0x2 /* set value, fail if attr does not exist */
76 /* Names for our Extended Attributes adouble data */
77 #define AD_EA_META "org.netatalk.Metadata"
78 #define AD_EA_RESO "org.netatalk.ResourceFork"
79 #define NOT_NETATALK_EA(a) (strcmp((a), AD_EA_META) != 0) && (strcmp((a), AD_EA_RESO) != 0)
81 /****************************************************************************************
82 * Wrappers for native EA functions taken from Samba
83 ****************************************************************************************/
84 ssize_t sys_getxattr (const char *path, const char *name, void *value, size_t size);
85 ssize_t sys_lgetxattr (const char *path, const char *name, void *value, size_t size);
86 ssize_t sys_fgetxattr (int filedes, const char *name, void *value, size_t size);
87 ssize_t sys_listxattr (const char *path, char *list, size_t size);
88 ssize_t sys_llistxattr (const char *path, char *list, size_t size);
89 ssize_t sys_flistxattr (int filedes, char *list, size_t size);
90 int sys_removexattr (const char *path, const char *name);
91 int sys_lremovexattr (const char *path, const char *name);
92 int sys_fremovexattr (int filedes, const char *name);
93 int sys_setxattr (const char *path, const char *name, const void *value, size_t size, int flags);
94 int sys_lsetxattr (const char *path, const char *name, const void *value, size_t size, int flags);
95 int sys_fsetxattr (int filedes, const char *name, const void *value, size_t size, int flags);
96 int sys_copyxattr (const char *src, const char *dst);
98 /****************************************************************************************
99 * Stuff for our implementation of storing EAs in files in .AppleDouble dirs
100 ****************************************************************************************/
102 #define EA_INITED 0xea494e54 /* ea"INT", for interfacing ea_open w. ea_close */
103 #define EA_MAGIC 0x61644541 /* "adEA" */
104 #define EA_VERSION1 0x01
105 #define EA_VERSION EA_VERSION1
109 EA_CREATE = (1<<1), /* create if not existing on ea_open */
110 EA_RDONLY = (1<<2), /* open read only */
111 EA_RDWR = (1<<3), /* open read/write */
112 /* ea_open internal flags */
113 EA_DIR = (1<<4) /* ea header file is for a dir, ea_open adds it as appropiate */
116 #define EA_MAGIC_OFF 0
117 #define EA_MAGIC_LEN 4
118 #define EA_VERSION_OFF (EA_MAGIC_OFF + EA_MAGIC_LEN)
119 #define EA_VERSION_LEN 2
120 #define EA_COUNT_OFF (EA_VERSION_OFF + EA_VERSION_LEN)
121 #define EA_COUNT_LEN 2
122 #define EA_HEADER_SIZE (EA_MAGIC_LEN + EA_VERSION_LEN + EA_COUNT_LEN)
125 * structs describing the layout of the Extended Attributes bookkeeping file.
126 * This isn't really an AppleDouble structure, it's just a binary blob that
127 * lives in our .AppleDouble directory too.
131 size_t ea_namelen; /* len of ea_name without terminating 0 ie. strlen(ea_name)*/
132 size_t ea_size; /* size of EA*/
133 char *ea_name; /* name of the EA */
136 /* We read the on-disk data into *ea_data and parse it into this*/
138 uint32_t ea_inited; /* needed for interfacing ea_open w. ea_close */
139 const struct vol *vol; /* vol handle, ea_close needs it */
140 int dirfd; /* for *at (cf openat) semantics, -1 means ignore */
141 char *filename; /* name of file, needed by ea_close too */
142 unsigned int ea_count; /* number of EAs in ea_entries array */
143 struct ea_entry (*ea_entries)[]; /* malloced and realloced as needed by ea_count*/
144 int ea_fd; /* open fd for ea_data */
145 eaflags_t ea_flags; /* flags */
146 size_t ea_size; /* size of header file = size of ea_data buffer */
147 char *ea_data; /* pointer to buffer into that we actually *
148 * read the disc file into */
151 /* On-disk format, just for reference ! */
153 struct ea_entry_ondisk {
155 char ea_name[]; /* zero terminated string */
160 u_int16_t ea_version;
162 struct ea_entry_ondisk ea_entries[ea_count];
166 /* VFS inderected funcs ... : */
168 /* Default adouble EAs */
169 extern int get_easize(VFS_FUNC_ARGS_EA_GETSIZE);
170 extern int get_eacontent(VFS_FUNC_ARGS_EA_GETCONTENT);
171 extern int list_eas(VFS_FUNC_ARGS_EA_LIST);
172 extern int set_ea(VFS_FUNC_ARGS_EA_SET);
173 extern int remove_ea(VFS_FUNC_ARGS_EA_REMOVE);
174 /* ... EA VFS funcs that deal with file/dir cp/mv/rm */
175 extern int ea_deletefile(VFS_FUNC_ARGS_DELETEFILE);
176 extern int ea_renamefile(VFS_FUNC_ARGS_RENAMEFILE);
177 extern int ea_copyfile(VFS_FUNC_ARGS_COPYFILE);
178 extern int ea_chown(VFS_FUNC_ARGS_CHOWN);
179 extern int ea_chmod_file(VFS_FUNC_ARGS_SETFILEMODE);
180 extern int ea_chmod_dir(VFS_FUNC_ARGS_SETDIRUNIXMODE);
183 extern int sys_get_easize(VFS_FUNC_ARGS_EA_GETSIZE);
184 extern int sys_get_eacontent(VFS_FUNC_ARGS_EA_GETCONTENT);
185 extern int sys_list_eas(VFS_FUNC_ARGS_EA_LIST);
186 extern int sys_set_ea(VFS_FUNC_ARGS_EA_SET);
187 extern int sys_remove_ea(VFS_FUNC_ARGS_EA_REMOVE);
188 /* native EA VFSfile/dir cp/mv/rm */
189 extern int sys_ea_copyfile(VFS_FUNC_ARGS_COPYFILE);
191 /* dbd needs access to these */
192 extern int ea_open(const struct vol * restrict vol,
193 const char * restrict uname,
195 struct ea * restrict ea);
196 extern int ea_openat(const struct vol * restrict vol,
198 const char * restrict uname,
200 struct ea * restrict ea);
201 extern int ea_close(struct ea * restrict ea);
202 extern char *ea_path(const struct ea * restrict ea, const char * restrict eaname, int macname);
204 #endif /* ATALK_EA_H */