9dd49f960f
that I've been working on but put off committing until after the RELENG_7 branch, including: * New manpages: cpio.5 mtree.5 * New archive_entry_strmode() * New archive_entry_link_resolver() * New read support: mtree format * Internal API change: read format auction only runs once * Running the auction only once allowed simplifying a lot of bid logic. * Cpio robustness: search for next header after a sync error * Support device nodes on ISO9660 images * Eliminate a lot of unnecessary copies for uncompressed archives * Corrected handling of new GNU --sparse --posix formats * Correctly handle a zero-byte write to a compressed archive * Fixed memory leaks Many of these improvements were motivated by the upcoming bsdcpio front-end. There have also been extensive improvements to the libarchive_test test harness, which I'll commit separately.
313 lines
13 KiB
C
313 lines
13 KiB
C
/*-
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* Copyright (c) 2003-2007 Tim Kientzle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef ARCHIVE_ENTRY_H_INCLUDED
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#define ARCHIVE_ENTRY_H_INCLUDED
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#include <sys/types.h>
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#include <stddef.h> /* for wchar_t */
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#include <time.h>
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#include <unistd.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Description of an archive entry.
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*
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* Basically, a "struct stat" with a few text fields added in.
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*
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* TODO: Add "comment", "charset", and possibly other entries that are
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* supported by "pax interchange" format. However, GNU, ustar, cpio,
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* and other variants don't support these features, so they're not an
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* excruciatingly high priority right now.
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*
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* TODO: "pax interchange" format allows essentially arbitrary
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* key/value attributes to be attached to any entry. Supporting
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* such extensions may make this library useful for special
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* applications (e.g., a package manager could attach special
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* package-management attributes to each entry).
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*/
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struct archive_entry;
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/*
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* File-type constants. These are returned from archive_entry_filetype().
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*/
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#define AE_IFMT 0170000
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#define AE_IFREG 0100000
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#define AE_IFLNK 0120000
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#define AE_IFSOCK 0140000
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#define AE_IFCHR 0020000
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#define AE_IFBLK 0060000
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#define AE_IFDIR 0040000
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#define AE_IFIFO 0010000
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/*
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* Basic object manipulation
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*/
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struct archive_entry *archive_entry_clear(struct archive_entry *);
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/* The 'clone' function does a deep copy; all of the strings are copied too. */
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struct archive_entry *archive_entry_clone(struct archive_entry *);
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void archive_entry_free(struct archive_entry *);
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struct archive_entry *archive_entry_new(void);
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/*
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* Retrieve fields from an archive_entry.
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*/
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time_t archive_entry_atime(struct archive_entry *);
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long archive_entry_atime_nsec(struct archive_entry *);
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time_t archive_entry_ctime(struct archive_entry *);
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long archive_entry_ctime_nsec(struct archive_entry *);
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dev_t archive_entry_dev(struct archive_entry *);
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dev_t archive_entry_devmajor(struct archive_entry *);
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dev_t archive_entry_devminor(struct archive_entry *);
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mode_t archive_entry_filetype(struct archive_entry *);
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void archive_entry_fflags(struct archive_entry *,
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unsigned long *set, unsigned long *clear);
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const char *archive_entry_fflags_text(struct archive_entry *);
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gid_t archive_entry_gid(struct archive_entry *);
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const char *archive_entry_gname(struct archive_entry *);
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const wchar_t *archive_entry_gname_w(struct archive_entry *);
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const char *archive_entry_hardlink(struct archive_entry *);
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const wchar_t *archive_entry_hardlink_w(struct archive_entry *);
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ino_t archive_entry_ino(struct archive_entry *);
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mode_t archive_entry_mode(struct archive_entry *);
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time_t archive_entry_mtime(struct archive_entry *);
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long archive_entry_mtime_nsec(struct archive_entry *);
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unsigned int archive_entry_nlink(struct archive_entry *);
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const char *archive_entry_pathname(struct archive_entry *);
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const wchar_t *archive_entry_pathname_w(struct archive_entry *);
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dev_t archive_entry_rdev(struct archive_entry *);
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dev_t archive_entry_rdevmajor(struct archive_entry *);
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dev_t archive_entry_rdevminor(struct archive_entry *);
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int64_t archive_entry_size(struct archive_entry *);
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const char *archive_entry_strmode(struct archive_entry *);
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const char *archive_entry_symlink(struct archive_entry *);
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const wchar_t *archive_entry_symlink_w(struct archive_entry *);
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uid_t archive_entry_uid(struct archive_entry *);
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const char *archive_entry_uname(struct archive_entry *);
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const wchar_t *archive_entry_uname_w(struct archive_entry *);
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/*
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* Set fields in an archive_entry.
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*
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* Note that string 'set' functions do not copy the string, only the pointer.
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* In contrast, 'copy' functions do copy the object pointed to.
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*/
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void archive_entry_set_atime(struct archive_entry *, time_t, long);
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void archive_entry_set_ctime(struct archive_entry *, time_t, long);
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void archive_entry_set_dev(struct archive_entry *, dev_t);
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void archive_entry_set_devmajor(struct archive_entry *, dev_t);
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void archive_entry_set_devminor(struct archive_entry *, dev_t);
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void archive_entry_set_filetype(struct archive_entry *, unsigned int);
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void archive_entry_set_fflags(struct archive_entry *,
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unsigned long set, unsigned long clear);
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/* Returns pointer to start of first invalid token, or NULL if none. */
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/* Note that all recognized tokens are processed, regardless. */
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const wchar_t *archive_entry_copy_fflags_text_w(struct archive_entry *,
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const wchar_t *);
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void archive_entry_set_gid(struct archive_entry *, gid_t);
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void archive_entry_set_gname(struct archive_entry *, const char *);
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void archive_entry_copy_gname(struct archive_entry *, const char *);
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void archive_entry_copy_gname_w(struct archive_entry *, const wchar_t *);
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void archive_entry_set_hardlink(struct archive_entry *, const char *);
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void archive_entry_copy_hardlink(struct archive_entry *, const char *);
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void archive_entry_copy_hardlink_w(struct archive_entry *, const wchar_t *);
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void archive_entry_set_ino(struct archive_entry *, unsigned long);
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void archive_entry_set_link(struct archive_entry *, const char *);
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void archive_entry_set_mode(struct archive_entry *, mode_t);
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void archive_entry_set_mtime(struct archive_entry *, time_t, long);
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void archive_entry_set_nlink(struct archive_entry *, unsigned int);
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void archive_entry_set_pathname(struct archive_entry *, const char *);
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void archive_entry_copy_pathname(struct archive_entry *, const char *);
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void archive_entry_copy_pathname_w(struct archive_entry *, const wchar_t *);
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void archive_entry_set_perm(struct archive_entry *, mode_t);
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void archive_entry_set_rdev(struct archive_entry *, dev_t);
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void archive_entry_set_rdevmajor(struct archive_entry *, dev_t);
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void archive_entry_set_rdevminor(struct archive_entry *, dev_t);
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void archive_entry_set_size(struct archive_entry *, int64_t);
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void archive_entry_set_symlink(struct archive_entry *, const char *);
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void archive_entry_copy_symlink(struct archive_entry *, const char *);
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void archive_entry_copy_symlink_w(struct archive_entry *, const wchar_t *);
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void archive_entry_set_uid(struct archive_entry *, uid_t);
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void archive_entry_set_uname(struct archive_entry *, const char *);
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void archive_entry_copy_uname(struct archive_entry *, const char *);
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void archive_entry_copy_uname_w(struct archive_entry *, const wchar_t *);
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/*
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* Routines to bulk copy fields to/from a platform-native "struct
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* stat." Libarchive used to just store a struct stat inside of each
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* archive_entry object, but this created issues when trying to
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* manipulate archives on systems different than the ones they were
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* created on.
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*
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* TODO: On Linux, provide both stat32 and stat64 versions of these functions.
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*/
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const struct stat *archive_entry_stat(struct archive_entry *);
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void archive_entry_copy_stat(struct archive_entry *, const struct stat *);
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/*
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* ACL routines. This used to simply store and return text-format ACL
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* strings, but that proved insufficient for a number of reasons:
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* = clients need control over uname/uid and gname/gid mappings
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* = there are many different ACL text formats
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* = would like to be able to read/convert archives containing ACLs
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* on platforms that lack ACL libraries
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*/
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/*
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* Permission bits mimic POSIX.1e. Note that I've not followed POSIX.1e's
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* "permset"/"perm" abstract type nonsense. A permset is just a simple
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* bitmap, following long-standing Unix tradition.
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*/
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#define ARCHIVE_ENTRY_ACL_EXECUTE 1
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#define ARCHIVE_ENTRY_ACL_WRITE 2
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#define ARCHIVE_ENTRY_ACL_READ 4
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/* We need to be able to specify either or both of these. */
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#define ARCHIVE_ENTRY_ACL_TYPE_ACCESS 256
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#define ARCHIVE_ENTRY_ACL_TYPE_DEFAULT 512
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/* Tag values mimic POSIX.1e */
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#define ARCHIVE_ENTRY_ACL_USER 10001 /* Specified user. */
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#define ARCHIVE_ENTRY_ACL_USER_OBJ 10002 /* User who owns the file. */
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#define ARCHIVE_ENTRY_ACL_GROUP 10003 /* Specified group. */
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#define ARCHIVE_ENTRY_ACL_GROUP_OBJ 10004 /* Group who owns the file. */
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#define ARCHIVE_ENTRY_ACL_MASK 10005 /* Modify group access. */
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#define ARCHIVE_ENTRY_ACL_OTHER 10006 /* Public. */
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/*
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* Set the ACL by clearing it and adding entries one at a time.
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* Unlike the POSIX.1e ACL routines, you must specify the type
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* (access/default) for each entry. Internally, the ACL data is just
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* a soup of entries. API calls here allow you to retrieve just the
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* entries of interest. This design (which goes against the spirit of
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* POSIX.1e) is useful for handling archive formats that combine
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* default and access information in a single ACL list.
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*/
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void archive_entry_acl_clear(struct archive_entry *);
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void archive_entry_acl_add_entry(struct archive_entry *,
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int type, int permset, int tag, int qual, const char *name);
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void archive_entry_acl_add_entry_w(struct archive_entry *,
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int type, int permset, int tag, int qual, const wchar_t *name);
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/*
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* To retrieve the ACL, first "reset", then repeatedly ask for the
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* "next" entry. The want_type parameter allows you to request only
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* access entries or only default entries.
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*/
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int archive_entry_acl_reset(struct archive_entry *, int want_type);
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int archive_entry_acl_next(struct archive_entry *, int want_type,
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int *type, int *permset, int *tag, int *qual, const char **name);
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int archive_entry_acl_next_w(struct archive_entry *, int want_type,
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int *type, int *permset, int *tag, int *qual,
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const wchar_t **name);
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/*
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* Construct a text-format ACL. The flags argument is a bitmask that
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* can include any of the following:
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*
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* ARCHIVE_ENTRY_ACL_TYPE_ACCESS - Include access entries.
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* ARCHIVE_ENTRY_ACL_TYPE_DEFAULT - Include default entries.
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* ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID - Include extra numeric ID field in
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* each ACL entry. (As used by 'star'.)
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* ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT - Include "default:" before each
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* default ACL entry.
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*/
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#define ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID 1024
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#define ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT 2048
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const wchar_t *archive_entry_acl_text_w(struct archive_entry *, int flags);
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/* Return a count of entries matching 'want_type' */
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int archive_entry_acl_count(struct archive_entry *, int want_type);
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/*
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* Private ACL parser. This is private because it handles some
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* very weird formats that clients should not be messing with.
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* Clients should only deal with their platform-native formats.
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* Because of the need to support many formats cleanly, new arguments
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* are likely to get added on a regular basis. Clients who try to use
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* this interface are likely to be surprised when it changes.
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*
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* You were warned!
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*/
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int __archive_entry_acl_parse_w(struct archive_entry *,
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const wchar_t *, int type);
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/*
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* extended attributes
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*/
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void archive_entry_xattr_clear(struct archive_entry *);
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void archive_entry_xattr_add_entry(struct archive_entry *,
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const char *name, const void *value, size_t size);
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/*
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* To retrieve the xattr list, first "reset", then repeatedly ask for the
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* "next" entry.
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*/
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int archive_entry_xattr_count(struct archive_entry *);
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int archive_entry_xattr_reset(struct archive_entry *);
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int archive_entry_xattr_next(struct archive_entry *,
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const char **name, const void **value, size_t *);
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/*
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* Utility to detect hardlinks.
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*
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* The 'struct archive_hardlink_lookup' is a cache of entry
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* names and dev/ino numbers. Here's how to use it:
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* 1. Create a lookup object with archive_hardlink_lookup_new()
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* 2. Hand each archive_entry to archive_hardlink_lookup().
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* That function will return NULL (this is not a hardlink to
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* a previous entry) or the pathname of the first entry
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* that matched this.
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* 3. Use archive_hardlink_lookup_free() to release the cache.
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*
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* To make things more efficient, be sure that each entry has a valid
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* nlinks value. The hardlink cache uses this to track when all links
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* have been found. If the nlinks value is zero, it will keep every
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* name in the cache indefinitely, which can use a lot of memory.
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*/
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struct archive_entry_linkresolver;
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struct archive_entry_linkresolver *archive_entry_linkresolver_new(void);
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void archive_entry_linkresolver_free(struct archive_entry_linkresolver *);
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const char *archive_entry_linkresolve(struct archive_entry_linkresolver *,
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struct archive_entry *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* !ARCHIVE_ENTRY_H_INCLUDED */
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