8e4bc81237
override the currently set link value, whether that's a hardlink or a symlink. Plus documentation update and tests.
349 lines
15 KiB
C
349 lines
15 KiB
C
/*-
|
|
* Copyright (c) 2003-2007 Tim Kientzle
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef ARCHIVE_ENTRY_H_INCLUDED
|
|
#define ARCHIVE_ENTRY_H_INCLUDED
|
|
|
|
#include <sys/types.h>
|
|
#include <stddef.h> /* for wchar_t */
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Description of an archive entry.
|
|
*
|
|
* Basically, a "struct stat" with a few text fields added in.
|
|
*
|
|
* TODO: Add "comment", "charset", and possibly other entries that are
|
|
* supported by "pax interchange" format. However, GNU, ustar, cpio,
|
|
* and other variants don't support these features, so they're not an
|
|
* excruciatingly high priority right now.
|
|
*
|
|
* TODO: "pax interchange" format allows essentially arbitrary
|
|
* key/value attributes to be attached to any entry. Supporting
|
|
* such extensions may make this library useful for special
|
|
* applications (e.g., a package manager could attach special
|
|
* package-management attributes to each entry).
|
|
*/
|
|
struct archive_entry;
|
|
|
|
/*
|
|
* File-type constants. These are returned from archive_entry_filetype()
|
|
* and passed to archive_entry_set_filetype().
|
|
*
|
|
* These values match S_XXX defines on every platform I've checked,
|
|
* including Windows, AIX, Linux, Solaris, and BSD. They're
|
|
* (re)defined here because platforms generally don't define the ones
|
|
* they don't support. For example, Windows doesn't define S_IFLNK or
|
|
* S_IFBLK. Instead of having a mass of conditional logic and system
|
|
* checks to define any S_XXX values that aren't supported locally,
|
|
* I've just defined a new set of such constants so that
|
|
* libarchive-based applications can manipulate and identify archive
|
|
* entries properly even if the hosting platform can't store them on
|
|
* disk.
|
|
*
|
|
* These values are also used directly within some portable formats,
|
|
* such as cpio. If you find a platform that varies from these, the
|
|
* correct solution is to leave these alone and translate from these
|
|
* portable values to platform-native values when entries are read from
|
|
* or written to disk.
|
|
*/
|
|
#define AE_IFMT 0170000
|
|
#define AE_IFREG 0100000
|
|
#define AE_IFLNK 0120000
|
|
#define AE_IFSOCK 0140000
|
|
#define AE_IFCHR 0020000
|
|
#define AE_IFBLK 0060000
|
|
#define AE_IFDIR 0040000
|
|
#define AE_IFIFO 0010000
|
|
|
|
/*
|
|
* Basic object manipulation
|
|
*/
|
|
|
|
struct archive_entry *archive_entry_clear(struct archive_entry *);
|
|
/* The 'clone' function does a deep copy; all of the strings are copied too. */
|
|
struct archive_entry *archive_entry_clone(struct archive_entry *);
|
|
void archive_entry_free(struct archive_entry *);
|
|
struct archive_entry *archive_entry_new(void);
|
|
|
|
/*
|
|
* Retrieve fields from an archive_entry.
|
|
*/
|
|
|
|
time_t archive_entry_atime(struct archive_entry *);
|
|
long archive_entry_atime_nsec(struct archive_entry *);
|
|
time_t archive_entry_ctime(struct archive_entry *);
|
|
long archive_entry_ctime_nsec(struct archive_entry *);
|
|
dev_t archive_entry_dev(struct archive_entry *);
|
|
dev_t archive_entry_devmajor(struct archive_entry *);
|
|
dev_t archive_entry_devminor(struct archive_entry *);
|
|
mode_t archive_entry_filetype(struct archive_entry *);
|
|
void archive_entry_fflags(struct archive_entry *,
|
|
unsigned long * /* set */,
|
|
unsigned long * /* clear */);
|
|
const char *archive_entry_fflags_text(struct archive_entry *);
|
|
gid_t archive_entry_gid(struct archive_entry *);
|
|
const char *archive_entry_gname(struct archive_entry *);
|
|
const wchar_t *archive_entry_gname_w(struct archive_entry *);
|
|
const char *archive_entry_hardlink(struct archive_entry *);
|
|
const wchar_t *archive_entry_hardlink_w(struct archive_entry *);
|
|
ino_t archive_entry_ino(struct archive_entry *);
|
|
mode_t archive_entry_mode(struct archive_entry *);
|
|
time_t archive_entry_mtime(struct archive_entry *);
|
|
long archive_entry_mtime_nsec(struct archive_entry *);
|
|
unsigned int archive_entry_nlink(struct archive_entry *);
|
|
const char *archive_entry_pathname(struct archive_entry *);
|
|
const wchar_t *archive_entry_pathname_w(struct archive_entry *);
|
|
dev_t archive_entry_rdev(struct archive_entry *);
|
|
dev_t archive_entry_rdevmajor(struct archive_entry *);
|
|
dev_t archive_entry_rdevminor(struct archive_entry *);
|
|
int64_t archive_entry_size(struct archive_entry *);
|
|
const char *archive_entry_strmode(struct archive_entry *);
|
|
const char *archive_entry_symlink(struct archive_entry *);
|
|
const wchar_t *archive_entry_symlink_w(struct archive_entry *);
|
|
uid_t archive_entry_uid(struct archive_entry *);
|
|
const char *archive_entry_uname(struct archive_entry *);
|
|
const wchar_t *archive_entry_uname_w(struct archive_entry *);
|
|
|
|
/*
|
|
* Set fields in an archive_entry.
|
|
*
|
|
* Note that string 'set' functions do not copy the string, only the pointer.
|
|
* In contrast, 'copy' functions do copy the object pointed to.
|
|
*/
|
|
|
|
void archive_entry_set_atime(struct archive_entry *, time_t, long);
|
|
void archive_entry_set_ctime(struct archive_entry *, time_t, long);
|
|
void archive_entry_set_dev(struct archive_entry *, dev_t);
|
|
void archive_entry_set_devmajor(struct archive_entry *, dev_t);
|
|
void archive_entry_set_devminor(struct archive_entry *, dev_t);
|
|
void archive_entry_set_filetype(struct archive_entry *, unsigned int);
|
|
void archive_entry_set_fflags(struct archive_entry *,
|
|
unsigned long /* set */, unsigned long /* clear */);
|
|
/* Returns pointer to start of first invalid token, or NULL if none. */
|
|
/* Note that all recognized tokens are processed, regardless. */
|
|
const wchar_t *archive_entry_copy_fflags_text_w(struct archive_entry *,
|
|
const wchar_t *);
|
|
void archive_entry_set_gid(struct archive_entry *, gid_t);
|
|
void archive_entry_set_gname(struct archive_entry *, const char *);
|
|
void archive_entry_copy_gname(struct archive_entry *, const char *);
|
|
void archive_entry_copy_gname_w(struct archive_entry *, const wchar_t *);
|
|
void archive_entry_set_hardlink(struct archive_entry *, const char *);
|
|
void archive_entry_copy_hardlink(struct archive_entry *, const char *);
|
|
void archive_entry_copy_hardlink_w(struct archive_entry *, const wchar_t *);
|
|
void archive_entry_set_ino(struct archive_entry *, unsigned long);
|
|
void archive_entry_set_link(struct archive_entry *, const char *);
|
|
void archive_entry_copy_link(struct archive_entry *, const char *);
|
|
void archive_entry_copy_link_w(struct archive_entry *, const wchar_t *);
|
|
void archive_entry_set_mode(struct archive_entry *, mode_t);
|
|
void archive_entry_set_mtime(struct archive_entry *, time_t, long);
|
|
void archive_entry_set_nlink(struct archive_entry *, unsigned int);
|
|
void archive_entry_set_pathname(struct archive_entry *, const char *);
|
|
void archive_entry_copy_pathname(struct archive_entry *, const char *);
|
|
void archive_entry_copy_pathname_w(struct archive_entry *, const wchar_t *);
|
|
void archive_entry_set_perm(struct archive_entry *, mode_t);
|
|
void archive_entry_set_rdev(struct archive_entry *, dev_t);
|
|
void archive_entry_set_rdevmajor(struct archive_entry *, dev_t);
|
|
void archive_entry_set_rdevminor(struct archive_entry *, dev_t);
|
|
void archive_entry_set_size(struct archive_entry *, int64_t);
|
|
void archive_entry_set_symlink(struct archive_entry *, const char *);
|
|
void archive_entry_copy_symlink(struct archive_entry *, const char *);
|
|
void archive_entry_copy_symlink_w(struct archive_entry *, const wchar_t *);
|
|
void archive_entry_set_uid(struct archive_entry *, uid_t);
|
|
void archive_entry_set_uname(struct archive_entry *, const char *);
|
|
void archive_entry_copy_uname(struct archive_entry *, const char *);
|
|
void archive_entry_copy_uname_w(struct archive_entry *, const wchar_t *);
|
|
|
|
/*
|
|
* Routines to bulk copy fields to/from a platform-native "struct
|
|
* stat." Libarchive used to just store a struct stat inside of each
|
|
* archive_entry object, but this created issues when trying to
|
|
* manipulate archives on systems different than the ones they were
|
|
* created on.
|
|
*
|
|
* TODO: On Linux, provide both stat32 and stat64 versions of these functions.
|
|
*/
|
|
const struct stat *archive_entry_stat(struct archive_entry *);
|
|
void archive_entry_copy_stat(struct archive_entry *, const struct stat *);
|
|
|
|
/*
|
|
* ACL routines. This used to simply store and return text-format ACL
|
|
* strings, but that proved insufficient for a number of reasons:
|
|
* = clients need control over uname/uid and gname/gid mappings
|
|
* = there are many different ACL text formats
|
|
* = would like to be able to read/convert archives containing ACLs
|
|
* on platforms that lack ACL libraries
|
|
*
|
|
* This last point, in particular, forces me to implement a reasonably
|
|
* complete set of ACL support routines.
|
|
*
|
|
* TODO: Extend this to support NFSv4/NTFS permissions. That should
|
|
* allow full ACL support on Mac OS, in particular, which uses
|
|
* POSIX.1e-style interfaces to manipulate NFSv4/NTFS permissions.
|
|
*/
|
|
|
|
/*
|
|
* Permission bits mimic POSIX.1e. Note that I've not followed POSIX.1e's
|
|
* "permset"/"perm" abstract type nonsense. A permset is just a simple
|
|
* bitmap, following long-standing Unix tradition.
|
|
*/
|
|
#define ARCHIVE_ENTRY_ACL_EXECUTE 1
|
|
#define ARCHIVE_ENTRY_ACL_WRITE 2
|
|
#define ARCHIVE_ENTRY_ACL_READ 4
|
|
|
|
/* We need to be able to specify either or both of these. */
|
|
#define ARCHIVE_ENTRY_ACL_TYPE_ACCESS 256
|
|
#define ARCHIVE_ENTRY_ACL_TYPE_DEFAULT 512
|
|
|
|
/* Tag values mimic POSIX.1e */
|
|
#define ARCHIVE_ENTRY_ACL_USER 10001 /* Specified user. */
|
|
#define ARCHIVE_ENTRY_ACL_USER_OBJ 10002 /* User who owns the file. */
|
|
#define ARCHIVE_ENTRY_ACL_GROUP 10003 /* Specified group. */
|
|
#define ARCHIVE_ENTRY_ACL_GROUP_OBJ 10004 /* Group who owns the file. */
|
|
#define ARCHIVE_ENTRY_ACL_MASK 10005 /* Modify group access. */
|
|
#define ARCHIVE_ENTRY_ACL_OTHER 10006 /* Public. */
|
|
|
|
/*
|
|
* Set the ACL by clearing it and adding entries one at a time.
|
|
* Unlike the POSIX.1e ACL routines, you must specify the type
|
|
* (access/default) for each entry. Internally, the ACL data is just
|
|
* a soup of entries. API calls here allow you to retrieve just the
|
|
* entries of interest. This design (which goes against the spirit of
|
|
* POSIX.1e) is useful for handling archive formats that combine
|
|
* default and access information in a single ACL list.
|
|
*/
|
|
void archive_entry_acl_clear(struct archive_entry *);
|
|
void archive_entry_acl_add_entry(struct archive_entry *,
|
|
int /* type */, int /* permset */, int /* tag */,
|
|
int /* qual */, const char * /* name */);
|
|
void archive_entry_acl_add_entry_w(struct archive_entry *,
|
|
int /* type */, int /* permset */, int /* tag */,
|
|
int /* qual */, const wchar_t * /* name */);
|
|
|
|
/*
|
|
* To retrieve the ACL, first "reset", then repeatedly ask for the
|
|
* "next" entry. The want_type parameter allows you to request only
|
|
* access entries or only default entries.
|
|
*/
|
|
int archive_entry_acl_reset(struct archive_entry *, int /* want_type */);
|
|
int archive_entry_acl_next(struct archive_entry *, int /* want_type */,
|
|
int * /* type */, int * /* permset */, int * /* tag */,
|
|
int * /* qual */, const char ** /* name */);
|
|
int archive_entry_acl_next_w(struct archive_entry *, int /* want_type */,
|
|
int * /* type */, int * /* permset */, int * /* tag */,
|
|
int * /* qual */, const wchar_t ** /* name */);
|
|
|
|
/*
|
|
* Construct a text-format ACL. The flags argument is a bitmask that
|
|
* can include any of the following:
|
|
*
|
|
* ARCHIVE_ENTRY_ACL_TYPE_ACCESS - Include access entries.
|
|
* ARCHIVE_ENTRY_ACL_TYPE_DEFAULT - Include default entries.
|
|
* ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID - Include extra numeric ID field in
|
|
* each ACL entry. (As used by 'star'.)
|
|
* ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT - Include "default:" before each
|
|
* default ACL entry.
|
|
*/
|
|
#define ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID 1024
|
|
#define ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT 2048
|
|
const wchar_t *archive_entry_acl_text_w(struct archive_entry *,
|
|
int /* flags */);
|
|
|
|
/* Return a count of entries matching 'want_type' */
|
|
int archive_entry_acl_count(struct archive_entry *, int /* want_type */);
|
|
|
|
/*
|
|
* Private ACL parser. This is private because it handles some
|
|
* very weird formats that clients should not be messing with.
|
|
* Clients should only deal with their platform-native formats.
|
|
* Because of the need to support many formats cleanly, new arguments
|
|
* are likely to get added on a regular basis. Clients who try to use
|
|
* this interface are likely to be surprised when it changes.
|
|
*
|
|
* You were warned!
|
|
*
|
|
* TODO: Move this declaration out of the public header and into
|
|
* a private header. Warnings above are silly.
|
|
*/
|
|
int __archive_entry_acl_parse_w(struct archive_entry *,
|
|
const wchar_t *, int /* type */);
|
|
|
|
/*
|
|
* extended attributes
|
|
*/
|
|
|
|
void archive_entry_xattr_clear(struct archive_entry *);
|
|
void archive_entry_xattr_add_entry(struct archive_entry *,
|
|
const char * /* name */, const void * /* value */,
|
|
size_t /* size */);
|
|
|
|
/*
|
|
* To retrieve the xattr list, first "reset", then repeatedly ask for the
|
|
* "next" entry.
|
|
*/
|
|
|
|
int archive_entry_xattr_count(struct archive_entry *);
|
|
int archive_entry_xattr_reset(struct archive_entry *);
|
|
int archive_entry_xattr_next(struct archive_entry *,
|
|
const char ** /* name */, const void ** /* value */, size_t *);
|
|
|
|
/*
|
|
* Utility to detect hardlinks.
|
|
*
|
|
* The 'struct archive_hardlink_lookup' is a cache of entry
|
|
* names and dev/ino numbers. Here's how to use it:
|
|
* 1. Create a lookup object with archive_hardlink_lookup_new()
|
|
* 2. Hand each archive_entry to archive_hardlink_lookup().
|
|
* That function will return NULL (this is not a hardlink to
|
|
* a previous entry) or the pathname of the first entry
|
|
* that matched this.
|
|
* 3. Use archive_hardlink_lookup_free() to release the cache.
|
|
*
|
|
* To make things more efficient, be sure that each entry has a valid
|
|
* nlinks value. The hardlink cache uses this to track when all links
|
|
* have been found. If the nlinks value is zero, it will keep every
|
|
* name in the cache indefinitely, which can use a lot of memory.
|
|
*/
|
|
struct archive_entry_linkresolver;
|
|
|
|
struct archive_entry_linkresolver *archive_entry_linkresolver_new(void);
|
|
void archive_entry_linkresolver_free(struct archive_entry_linkresolver *);
|
|
const char *archive_entry_linkresolve(struct archive_entry_linkresolver *,
|
|
struct archive_entry *);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* !ARCHIVE_ENTRY_H_INCLUDED */
|