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.
158 lines
4.8 KiB
C
158 lines
4.8 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_PRIVATE_H_INCLUDED
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#define ARCHIVE_ENTRY_PRIVATE_H_INCLUDED
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/*
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* Handle wide character (i.e., Unicode) and non-wide character
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* strings transparently.
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*
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*/
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struct aes {
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const char *aes_mbs;
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char *aes_mbs_alloc;
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const wchar_t *aes_wcs;
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wchar_t *aes_wcs_alloc;
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};
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struct ae_acl {
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struct ae_acl *next;
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int type; /* E.g., access or default */
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int tag; /* E.g., user/group/other/mask */
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int permset; /* r/w/x bits */
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int id; /* uid/gid for user/group */
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struct aes name; /* uname/gname */
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};
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struct ae_xattr {
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struct ae_xattr *next;
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char *name;
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void *value;
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size_t size;
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};
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/*
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* Description of an archive entry.
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*
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* Basically, this is 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
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* that are supported by "pax interchange" format. However, GNU, ustar,
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* cpio, 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). There are tricky
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* API issues involved, so this is not going to happen until
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* there's a real demand for it.
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*
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* TODO: Design a good API for handling sparse files.
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*/
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struct archive_entry {
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/*
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* Note that ae_stat.st_mode & AE_IFMT can be 0!
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*
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* This occurs when the actual file type of the object is not
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* in the archive. For example, 'tar' archives store
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* hardlinks without marking the type of the underlying
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* object.
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*/
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/*
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* Read archive_entry_copy_stat.c for an explanation of why I
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* don't just use "struct stat" instead of "struct aest" here
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* and why I have this odd pointer to a separately-allocated
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* struct stat.
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*/
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void *stat;
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int stat_valid; /* Set to 0 whenever a field in aest changes. */
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struct aest {
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int64_t aest_atime;
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uint32_t aest_atime_nsec;
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int64_t aest_ctime;
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uint32_t aest_ctime_nsec;
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int64_t aest_mtime;
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uint32_t aest_mtime_nsec;
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gid_t aest_gid;
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ino_t aest_ino;
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mode_t aest_mode;
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uint32_t aest_nlink;
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uint64_t aest_size;
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uid_t aest_uid;
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/*
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* Because converting between device codes and
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* major/minor values is platform-specific and
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* inherently a bit risky, we only do that conversion
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* lazily. That way, we will do a better job of
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* preserving information in those cases where no
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* conversion is actually required.
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*/
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int aest_dev_is_broken_down;
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dev_t aest_dev;
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dev_t aest_devmajor;
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dev_t aest_devminor;
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int aest_rdev_is_broken_down;
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dev_t aest_rdev;
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dev_t aest_rdevmajor;
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dev_t aest_rdevminor;
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} ae_stat;
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/*
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* Use aes here so that we get transparent mbs<->wcs conversions.
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*/
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struct aes ae_fflags_text; /* Text fflags per fflagstostr(3) */
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unsigned long ae_fflags_set; /* Bitmap fflags */
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unsigned long ae_fflags_clear;
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struct aes ae_gname; /* Name of owning group */
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struct aes ae_hardlink; /* Name of target for hardlink */
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struct aes ae_pathname; /* Name of entry */
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struct aes ae_symlink; /* symlink contents */
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struct aes ae_uname; /* Name of owner */
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struct ae_acl *acl_head;
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struct ae_acl *acl_p;
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int acl_state; /* See acl_next for details. */
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wchar_t *acl_text_w;
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struct ae_xattr *xattr_head;
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struct ae_xattr *xattr_p;
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char strmode[11];
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};
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#endif /* ARCHIVE_ENTRY_PRIVATE_H_INCLUDED */
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