contrib/libarchive-1.3.1/libarchive/archive_entry.h

   1 /*-
   2  * Copyright (c) 2003-2004 Tim Kientzle
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/lib/libarchive/archive_entry.h,v 1.19 2006/03/21 16:55:46 kientzle Exp $
  27  */
  28
  29 #ifndef ARCHIVE_ENTRY_H_INCLUDED
  30 #define ARCHIVE_ENTRY_H_INCLUDED
  31
  32 #include <stddef.h>  /* for wchar_t */
  33 #include <unistd.h>
  34
  35 #ifdef __cplusplus
  36 extern "C" {
  37 #endif
  38
  39
  40 /*
  41  * Description of an archive entry.
  42  *
  43  * Basically, a "struct stat" with a few text fields added in.
  44  *
  45  * TODO: Add "comment", "charset", and possibly other entries that are
  46  * supported by "pax interchange" format.  However, GNU, ustar, cpio,
  47  * and other variants don't support these features, so they're not an
  48  * excruciatingly high priority right now.
  49  *
  50  * TODO: "pax interchange" format allows essentially arbitrary
  51  * key/value attributes to be attached to any entry.  Supporting
  52  * such extensions may make this library useful for special
  53  * applications (e.g., a package manager could attach special
  54  * package-management attributes to each entry).
  55  */
  56 struct archive_entry;
  57
  58 /*
  59  * Basic object manipulation
  60  */
  61
  62 struct archive_entry    *archive_entry_clear(struct archive_entry *);
  63 /* The 'clone' function does a deep copy; all of the strings are copied too. */
  64 struct archive_entry    *archive_entry_clone(struct archive_entry *);
  65 void                     archive_entry_free(struct archive_entry *);
  66 struct archive_entry    *archive_entry_new(void);
  67
  68 /*
  69  * Retrieve fields from an archive_entry.
  70  */
  71
  72 time_t                   archive_entry_atime(struct archive_entry *);
  73 long                     archive_entry_atime_nsec(struct archive_entry *);
  74 time_t                   archive_entry_ctime(struct archive_entry *);
  75 long                     archive_entry_ctime_nsec(struct archive_entry *);
  76 dev_t                    archive_entry_dev(struct archive_entry *);
  77 void                     archive_entry_fflags(struct archive_entry *,
  78                              unsigned long *set, unsigned long *clear);
  79 const char              *archive_entry_fflags_text(struct archive_entry *);
  80 gid_t                    archive_entry_gid(struct archive_entry *);
  81 const char              *archive_entry_gname(struct archive_entry *);
  82 const wchar_t           *archive_entry_gname_w(struct archive_entry *);
  83 const char              *archive_entry_hardlink(struct archive_entry *);
  84 const wchar_t           *archive_entry_hardlink_w(struct archive_entry *);
  85 ino_t                    archive_entry_ino(struct archive_entry *);
  86 mode_t                   archive_entry_mode(struct archive_entry *);
  87 time_t                   archive_entry_mtime(struct archive_entry *);
  88 long                     archive_entry_mtime_nsec(struct archive_entry *);
  89 const char              *archive_entry_pathname(struct archive_entry *);
  90 const wchar_t           *archive_entry_pathname_w(struct archive_entry *);
  91 dev_t                    archive_entry_rdev(struct archive_entry *);
  92 dev_t                    archive_entry_rdevmajor(struct archive_entry *);
  93 dev_t                    archive_entry_rdevminor(struct archive_entry *);
  94 int64_t                  archive_entry_size(struct archive_entry *);
  95 const struct stat       *archive_entry_stat(struct archive_entry *);
  96 const char              *archive_entry_symlink(struct archive_entry *);
  97 const wchar_t           *archive_entry_symlink_w(struct archive_entry *);
  98 uid_t                    archive_entry_uid(struct archive_entry *);
  99 const char              *archive_entry_uname(struct archive_entry *);
 100 const wchar_t           *archive_entry_uname_w(struct archive_entry *);
 101
 102 /*
 103  * Set fields in an archive_entry.
 104  *
 105  * Note that string 'set' functions do not copy the string, only the pointer.
 106  * In contrast, 'copy' functions do copy the object pointed to.
 107  */
 108
 109 void    archive_entry_copy_stat(struct archive_entry *, const struct stat *);
 110 void    archive_entry_set_atime(struct archive_entry *, time_t, long);
 111 void    archive_entry_set_ctime(struct archive_entry *, time_t, long);
 112 void    archive_entry_set_fflags(struct archive_entry *,
 113             unsigned long set, unsigned long clear);
 114 /* Returns pointer to start of first invalid token, or NULL if none. */
 115 /* Note that all recognized tokens are processed, regardless. */
 116 const wchar_t *archive_entry_copy_fflags_text_w(struct archive_entry *,
 117             const wchar_t *);
 118 void    archive_entry_set_gid(struct archive_entry *, gid_t);
 119 void    archive_entry_set_gname(struct archive_entry *, const char *);
 120 void    archive_entry_copy_gname_w(struct archive_entry *, const wchar_t *);
 121 void    archive_entry_set_hardlink(struct archive_entry *, const char *);
 122 void    archive_entry_copy_hardlink(struct archive_entry *, const char *);
 123 void    archive_entry_copy_hardlink_w(struct archive_entry *, const wchar_t *);
 124 void    archive_entry_set_link(struct archive_entry *, const char *);
 125 void    archive_entry_set_mode(struct archive_entry *, mode_t);
 126 void    archive_entry_set_mtime(struct archive_entry *, time_t, long);
 127 void    archive_entry_set_pathname(struct archive_entry *, const char *);
 128 void    archive_entry_copy_pathname(struct archive_entry *, const char *);
 129 void    archive_entry_copy_pathname_w(struct archive_entry *, const wchar_t *);
 130 void    archive_entry_set_rdevmajor(struct archive_entry *, dev_t);
 131 void    archive_entry_set_rdevminor(struct archive_entry *, dev_t);
 132 void    archive_entry_set_size(struct archive_entry *, int64_t);
 133 void    archive_entry_set_symlink(struct archive_entry *, const char *);
 134 void    archive_entry_copy_symlink_w(struct archive_entry *, const wchar_t *);
 135 void    archive_entry_set_uid(struct archive_entry *, uid_t);
 136 void    archive_entry_set_uname(struct archive_entry *, const char *);
 137 void    archive_entry_copy_uname_w(struct archive_entry *, const wchar_t *);
 138
 139 /*
 140  * ACL routines.  This used to simply store and return text-format ACL
 141  * strings, but that proved insufficient for a number of reasons:
 142  *   = clients need control over uname/uid and gname/gid mappings
 143  *   = there are many different ACL text formats
 144  *   = would like to be able to read/convert archives containing ACLs
 145  *     on platforms that lack ACL libraries
 146  */
 147
 148 /*
 149  * Permission bits mimic POSIX.1e.  Note that I've not followed POSIX.1e's
 150  * "permset"/"perm" abstract type nonsense.  A permset is just a simple
 151  * bitmap, following long-standing Unix tradition.
 152  */
 153 #define ARCHIVE_ENTRY_ACL_EXECUTE       1
 154 #define ARCHIVE_ENTRY_ACL_WRITE         2
 155 #define ARCHIVE_ENTRY_ACL_READ          4
 156
 157 /* We need to be able to specify either or both of these. */
 158 #define ARCHIVE_ENTRY_ACL_TYPE_ACCESS   256
 159 #define ARCHIVE_ENTRY_ACL_TYPE_DEFAULT  512
 160
 161 /* Tag values mimic POSIX.1e */
 162 #define ARCHIVE_ENTRY_ACL_USER          10001   /* Specified user. */
 163 #define ARCHIVE_ENTRY_ACL_USER_OBJ      10002   /* User who owns the file. */
 164 #define ARCHIVE_ENTRY_ACL_GROUP         10003   /* Specified group. */
 165 #define ARCHIVE_ENTRY_ACL_GROUP_OBJ     10004   /* Group who owns the file. */
 166 #define ARCHIVE_ENTRY_ACL_MASK          10005   /* Modify group access. */
 167 #define ARCHIVE_ENTRY_ACL_OTHER         10006   /* Public. */
 168
 169 /*
 170  * Set the ACL by clearing it and adding entries one at a time.
 171  * Unlike the POSIX.1e ACL routines, you must specify the type
 172  * (access/default) for each entry.  Internally, the ACL data is just
 173  * a soup of entries.  API calls here allow you to retrieve just the
 174  * entries of interest.  This design (which goes against the spirit of
 175  * POSIX.1e) is useful for handling archive formats that combine
 176  * default and access information in a single ACL list.
 177  */
 178 void     archive_entry_acl_clear(struct archive_entry *);
 179 void     archive_entry_acl_add_entry(struct archive_entry *,
 180              int type, int permset, int tag, int qual, const char *name);
 181 void     archive_entry_acl_add_entry_w(struct archive_entry *,
 182              int type, int permset, int tag, int qual, const wchar_t *name);
 183
 184 /*
 185  * To retrieve the ACL, first "reset", then repeatedly ask for the
 186  * "next" entry.  The want_type parameter allows you to request only
 187  * access entries or only default entries.
 188  */
 189 int      archive_entry_acl_reset(struct archive_entry *, int want_type);
 190 int      archive_entry_acl_next(struct archive_entry *, int want_type,
 191              int *type, int *permset, int *tag, int *qual, const char **name);
 192 int      archive_entry_acl_next_w(struct archive_entry *, int want_type,
 193              int *type, int *permset, int *tag, int *qual,
 194              const wchar_t **name);
 195
 196 /*
 197  * Construct a text-format ACL.  The flags argument is a bitmask that
 198  * can include any of the following:
 199  *
 200  * ARCHIVE_ENTRY_ACL_TYPE_ACCESS - Include access entries.
 201  * ARCHIVE_ENTRY_ACL_TYPE_DEFAULT - Include default entries.
 202  * ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID - Include extra numeric ID field in
 203  *    each ACL entry.  (As used by 'star'.)
 204  * ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT - Include "default:" before each
 205  *    default ACL entry.
 206  */
 207 #define ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID        1024
 208 #define ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT    2048
 209 const wchar_t   *archive_entry_acl_text_w(struct archive_entry *, int flags);
 210
 211 /* Return a count of entries matching 'want_type' */
 212 int      archive_entry_acl_count(struct archive_entry *, int want_type);
 213
 214 /*
 215  * Private ACL parser.  This is private because it handles some
 216  * very weird formats that clients should not be messing with.
 217  * Clients should only deal with their platform-native formats.
 218  * Because of the need to support many formats cleanly, new arguments
 219  * are likely to get added on a regular basis.  Clients who try to use
 220  * this interface are likely to be surprised when it changes.
 221  *
 222  * You were warned!
 223  */
 224 int              __archive_entry_acl_parse_w(struct archive_entry *,
 225                      const wchar_t *, int type);
 226
 227
 228 #ifdef __cplusplus
 229 }
 230 #endif
 231
 232 /*
 233  * extended attributes
 234  */
 235
 236 void     archive_entry_xattr_clear(struct archive_entry *);
 237 void     archive_entry_xattr_add_entry(struct archive_entry *,
 238              const char *name, const void *value, size_t size);
 239
 240 /*
 241  * To retrieve the xattr list, first "reset", then repeatedly ask for the
 242  * "next" entry.
 243  */
 244
 245 int     archive_entry_xattr_count(struct archive_entry *);
 246 int     archive_entry_xattr_reset(struct archive_entry *);
 247 int     archive_entry_xattr_next(struct archive_entry *,
 248              const char **name, const void **value, size_t *);
 249
 250
 251 #endif /* !ARCHIVE_ENTRY_H_INCLUDED */