source3/lib/adouble.h

   1 /*
   2  * Samba AppleDouble helpers
   3  *
   4  * Copyright (C) Ralph Boehme, 2019
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  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
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef _ADOUBLE_H_
  21 #define _ADOUBLE_H_
  22
  23 #include "MacExtensions.h"
  24
  25 #define ADOUBLE_NAME_PREFIX "._"
  26
  27 #define NETATALK_META_XATTR "org.netatalk.Metadata"
  28 #define NETATALK_RSRC_XATTR "org.netatalk.ResourceFork"
  29
  30 #if defined(HAVE_ATTROPEN)
  31 #define AFPINFO_EA_NETATALK NETATALK_META_XATTR
  32 #define AFPRESOURCE_EA_NETATALK NETATALK_RSRC_XATTR
  33 #else
  34 #define AFPINFO_EA_NETATALK "user." NETATALK_META_XATTR
  35 #define AFPRESOURCE_EA_NETATALK "user." NETATALK_RSRC_XATTR
  36 #endif
  37
  38 /*
  39  * There are two AppleDouble blobs we deal with:
  40  *
  41  * - ADOUBLE_META - AppleDouble blob used by Netatalk for storing
  42  *   metadata in an xattr
  43  *
  44  * - ADOUBLE_RSRC - AppleDouble blob used by OS X and Netatalk in
  45  *   ._ files
  46  */
  47 typedef enum {ADOUBLE_META, ADOUBLE_RSRC} adouble_type_t;
  48
  49 /* Version info */
  50 #define AD_VERSION2     0x00020000
  51 #define AD_VERSION      AD_VERSION2
  52
  53 /*
  54  * AppleDouble entry IDs.
  55  */
  56 #define ADEID_DFORK         1
  57 #define ADEID_RFORK         2
  58 #define ADEID_NAME          3
  59 #define ADEID_COMMENT       4
  60 #define ADEID_ICONBW        5
  61 #define ADEID_ICONCOL       6
  62 #define ADEID_FILEI         7
  63 #define ADEID_FILEDATESI    8
  64 #define ADEID_FINDERI       9
  65 #define ADEID_MACFILEI      10
  66 #define ADEID_PRODOSFILEI   11
  67 #define ADEID_MSDOSFILEI    12
  68 #define ADEID_SHORTNAME     13
  69 #define ADEID_AFPFILEI      14
  70 #define ADEID_DID           15
  71
  72 /* Private Netatalk entries */
  73 #define ADEID_PRIVDEV       16
  74 #define ADEID_PRIVINO       17
  75 #define ADEID_PRIVSYN       18
  76 #define ADEID_PRIVID        19
  77 #define ADEID_MAX           (ADEID_PRIVID + 1)
  78
  79 /*
  80  * These are the real ids for the private entries,
  81  * as stored in the adouble file
  82  */
  83 #define AD_DEV              0x80444556
  84 #define AD_INO              0x80494E4F
  85 #define AD_SYN              0x8053594E
  86 #define AD_ID               0x8053567E
  87
  88 /* AppleDouble magic */
  89 #define AD_APPLESINGLE_MAGIC 0x00051600
  90 #define AD_APPLEDOUBLE_MAGIC 0x00051607
  91 #define AD_MAGIC             AD_APPLEDOUBLE_MAGIC
  92
  93 /* Field widths */
  94 #define ADEDLEN_NAME            255
  95 #define ADEDLEN_COMMENT         200
  96 #define ADEDLEN_FILEI           16
  97 #define ADEDLEN_FINDERI         32
  98 #define ADEDLEN_FILEDATESI      16
  99 #define ADEDLEN_SHORTNAME       12 /* length up to 8.3 */
 100 #define ADEDLEN_AFPFILEI        4
 101 #define ADEDLEN_MACFILEI        4
 102 #define ADEDLEN_PRODOSFILEI     8
 103 #define ADEDLEN_MSDOSFILEI      2
 104 #define ADEDLEN_DID             4
 105 #define ADEDLEN_PRIVDEV         8
 106 #define ADEDLEN_PRIVINO         8
 107 #define ADEDLEN_PRIVSYN         8
 108 #define ADEDLEN_PRIVID          4
 109
 110 /*
 111  * Sharemode locks fcntl() offsets
 112  */
 113 #if _FILE_OFFSET_BITS == 64 || defined(HAVE_LARGEFILE)
 114 #define AD_FILELOCK_BASE (UINT64_C(0x7FFFFFFFFFFFFFFF) - 9)
 115 #else
 116 #define AD_FILELOCK_BASE (UINT32_C(0x7FFFFFFF) - 9)
 117 #endif
 118 #define BYTELOCK_MAX (AD_FILELOCK_BASE - 1)
 119
 120 #define AD_FILELOCK_OPEN_WR        (AD_FILELOCK_BASE + 0)
 121 #define AD_FILELOCK_OPEN_RD        (AD_FILELOCK_BASE + 1)
 122 #define AD_FILELOCK_RSRC_OPEN_WR   (AD_FILELOCK_BASE + 2)
 123 #define AD_FILELOCK_RSRC_OPEN_RD   (AD_FILELOCK_BASE + 3)
 124 #define AD_FILELOCK_DENY_WR        (AD_FILELOCK_BASE + 4)
 125 #define AD_FILELOCK_DENY_RD        (AD_FILELOCK_BASE + 5)
 126 #define AD_FILELOCK_RSRC_DENY_WR   (AD_FILELOCK_BASE + 6)
 127 #define AD_FILELOCK_RSRC_DENY_RD   (AD_FILELOCK_BASE + 7)
 128 #define AD_FILELOCK_OPEN_NONE      (AD_FILELOCK_BASE + 8)
 129 #define AD_FILELOCK_RSRC_OPEN_NONE (AD_FILELOCK_BASE + 9)
 130
 131 /* Time stuff we overload the bits a little */
 132 #define AD_DATE_CREATE         0
 133 #define AD_DATE_MODIFY         4
 134 #define AD_DATE_BACKUP         8
 135 #define AD_DATE_ACCESS        12
 136 #define AD_DATE_MASK          (AD_DATE_CREATE | AD_DATE_MODIFY | \
 137                                AD_DATE_BACKUP | AD_DATE_ACCESS)
 138 #define AD_DATE_UNIX          (1 << 10)
 139 #define AD_DATE_START         0x80000000
 140 #define AD_DATE_DELTA         946684800
 141 #define AD_DATE_FROM_UNIX(x)  (htonl((x) - AD_DATE_DELTA))
 142 #define AD_DATE_TO_UNIX(x)    (ntohl(x) + AD_DATE_DELTA)
 143
 144 #define AD_CONV_WIPE_BLANK      (1<<0)
 145 #define AD_CONV_DELETE          (1<<1)
 146
 147 struct adouble;
 148
 149 size_t ad_getentrylen(const struct adouble *ad, int eid);
 150 size_t ad_getentryoff(const struct adouble *ad, int eid);
 151 size_t ad_setentrylen(struct adouble *ad, int eid, size_t len);
 152 size_t ad_setentryoff(struct adouble *ad, int eid, size_t off);
 153 char *ad_get_entry(const struct adouble *ad, int eid);
 154 int ad_getdate(const struct adouble *ad, unsigned int dateoff, uint32_t *date);
 155 int ad_setdate(struct adouble *ad, unsigned int dateoff, uint32_t date);
 156 int ad_convert(struct vfs_handle_struct *handle,
 157                 struct files_struct *dirfsp,
 158                 const struct smb_filename *smb_fname,
 159                 const char *catia_mappings,
 160                 uint32_t flags);
 161 bool ad_unconvert(TALLOC_CTX *mem_ctx,
 162                   struct vfs_handle_struct *handle,
 163                   const char *catia_mappings,
 164                   struct smb_filename *smb_fname,
 165                   bool *converted);
 166 struct adouble *ad_init(TALLOC_CTX *ctx, adouble_type_t type);
 167 struct adouble *ad_get(TALLOC_CTX *ctx,
 168                        vfs_handle_struct *handle,
 169                        const struct smb_filename *smb_fname,
 170                        adouble_type_t type);
 171 struct adouble *ad_fget(TALLOC_CTX *ctx, vfs_handle_struct *handle,
 172                         files_struct *fsp, adouble_type_t type);
 173 int ad_set(vfs_handle_struct *handle,
 174            struct adouble *ad,
 175            const struct smb_filename *smb_fname);
 176 int ad_fset(struct vfs_handle_struct *handle,
 177             struct adouble *ad,
 178             files_struct *fsp);
 179 bool is_adouble_file(const char *path);
 180 int adouble_path(TALLOC_CTX *ctx,
 181                  const struct smb_filename *smb_fname_in,
 182                  struct smb_filename **pp_smb_fname_out);
 183
 184 AfpInfo *afpinfo_new(TALLOC_CTX *ctx);
 185 ssize_t afpinfo_pack(const AfpInfo *ai, char *buf);
 186 AfpInfo *afpinfo_unpack(TALLOC_CTX *ctx, const void *data);
 187
 188 #endif