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759 lines
22 KiB
759 lines
22 KiB
/*-
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* Copyright (c) 2003-2007 Tim Kientzle
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* Copyright (c) 2011-2012 Michihiro NAKAJIMA
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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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#include "archive_platform.h"
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__FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_format_ustar.c 191579 2009-04-27 18:35:03Z kientzle $");
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include "archive.h"
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#include "archive_entry.h"
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#include "archive_entry_locale.h"
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#include "archive_private.h"
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#include "archive_write_private.h"
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#include "archive_write_set_format_private.h"
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struct ustar {
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uint64_t entry_bytes_remaining;
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uint64_t entry_padding;
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struct archive_string_conv *opt_sconv;
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struct archive_string_conv *sconv_default;
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int init_default_conversion;
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};
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/*
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* Define structure of POSIX 'ustar' tar header.
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*/
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#define USTAR_name_offset 0
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#define USTAR_name_size 100
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#define USTAR_mode_offset 100
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#define USTAR_mode_size 6
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#define USTAR_mode_max_size 8
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#define USTAR_uid_offset 108
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#define USTAR_uid_size 6
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#define USTAR_uid_max_size 8
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#define USTAR_gid_offset 116
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#define USTAR_gid_size 6
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#define USTAR_gid_max_size 8
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#define USTAR_size_offset 124
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#define USTAR_size_size 11
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#define USTAR_size_max_size 12
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#define USTAR_mtime_offset 136
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#define USTAR_mtime_size 11
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#define USTAR_mtime_max_size 11
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#define USTAR_checksum_offset 148
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#define USTAR_checksum_size 8
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#define USTAR_typeflag_offset 156
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#define USTAR_typeflag_size 1
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#define USTAR_linkname_offset 157
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#define USTAR_linkname_size 100
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#define USTAR_magic_offset 257
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#define USTAR_magic_size 6
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#define USTAR_version_offset 263
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#define USTAR_version_size 2
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#define USTAR_uname_offset 265
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#define USTAR_uname_size 32
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#define USTAR_gname_offset 297
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#define USTAR_gname_size 32
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#define USTAR_rdevmajor_offset 329
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#define USTAR_rdevmajor_size 6
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#define USTAR_rdevmajor_max_size 8
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#define USTAR_rdevminor_offset 337
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#define USTAR_rdevminor_size 6
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#define USTAR_rdevminor_max_size 8
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#define USTAR_prefix_offset 345
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#define USTAR_prefix_size 155
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#define USTAR_padding_offset 500
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#define USTAR_padding_size 12
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/*
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* A filled-in copy of the header for initialization.
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*/
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static const char template_header[] = {
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/* name: 100 bytes */
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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0,0,0,0,
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/* Mode, space-null termination: 8 bytes */
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'0','0','0','0','0','0', ' ','\0',
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/* uid, space-null termination: 8 bytes */
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'0','0','0','0','0','0', ' ','\0',
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/* gid, space-null termination: 8 bytes */
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'0','0','0','0','0','0', ' ','\0',
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/* size, space termination: 12 bytes */
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'0','0','0','0','0','0','0','0','0','0','0', ' ',
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/* mtime, space termination: 12 bytes */
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'0','0','0','0','0','0','0','0','0','0','0', ' ',
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/* Initial checksum value: 8 spaces */
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' ',' ',' ',' ',' ',' ',' ',' ',
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/* Typeflag: 1 byte */
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'0', /* '0' = regular file */
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/* Linkname: 100 bytes */
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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0,0,0,0,
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/* Magic: 6 bytes, Version: 2 bytes */
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'u','s','t','a','r','\0', '0','0',
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/* Uname: 32 bytes */
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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/* Gname: 32 bytes */
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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/* rdevmajor + space/null padding: 8 bytes */
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'0','0','0','0','0','0', ' ','\0',
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/* rdevminor + space/null padding: 8 bytes */
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'0','0','0','0','0','0', ' ','\0',
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/* Prefix: 155 bytes */
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,
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/* Padding: 12 bytes */
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0,0,0,0,0,0,0,0, 0,0,0,0
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};
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static ssize_t archive_write_ustar_data(struct archive_write *a, const void *buff,
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size_t s);
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static int archive_write_ustar_free(struct archive_write *);
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static int archive_write_ustar_close(struct archive_write *);
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static int archive_write_ustar_finish_entry(struct archive_write *);
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static int archive_write_ustar_header(struct archive_write *,
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struct archive_entry *entry);
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static int archive_write_ustar_options(struct archive_write *,
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const char *, const char *);
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static int format_256(int64_t, char *, int);
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static int format_number(int64_t, char *, int size, int max, int strict);
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static int format_octal(int64_t, char *, int);
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/*
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* Set output format to 'ustar' format.
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*/
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int
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archive_write_set_format_ustar(struct archive *_a)
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{
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struct archive_write *a = (struct archive_write *)_a;
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struct ustar *ustar;
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archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
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ARCHIVE_STATE_NEW, "archive_write_set_format_ustar");
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/* If someone else was already registered, unregister them. */
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if (a->format_free != NULL)
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(a->format_free)(a);
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/* Basic internal sanity test. */
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if (sizeof(template_header) != 512) {
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archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
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"Internal: template_header wrong size: %zu should be 512",
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sizeof(template_header));
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return (ARCHIVE_FATAL);
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}
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ustar = (struct ustar *)calloc(1, sizeof(*ustar));
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if (ustar == NULL) {
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archive_set_error(&a->archive, ENOMEM,
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"Can't allocate ustar data");
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return (ARCHIVE_FATAL);
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}
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a->format_data = ustar;
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a->format_name = "ustar";
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a->format_options = archive_write_ustar_options;
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a->format_write_header = archive_write_ustar_header;
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a->format_write_data = archive_write_ustar_data;
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a->format_close = archive_write_ustar_close;
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a->format_free = archive_write_ustar_free;
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a->format_finish_entry = archive_write_ustar_finish_entry;
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a->archive.archive_format = ARCHIVE_FORMAT_TAR_USTAR;
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a->archive.archive_format_name = "POSIX ustar";
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return (ARCHIVE_OK);
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}
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static int
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archive_write_ustar_options(struct archive_write *a, const char *key,
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const char *val)
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{
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struct ustar *ustar = (struct ustar *)a->format_data;
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int ret = ARCHIVE_FAILED;
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if (strcmp(key, "hdrcharset") == 0) {
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if (val == NULL || val[0] == 0)
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archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
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"%s: hdrcharset option needs a character-set name",
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a->format_name);
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else {
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ustar->opt_sconv = archive_string_conversion_to_charset(
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&a->archive, val, 0);
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if (ustar->opt_sconv != NULL)
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ret = ARCHIVE_OK;
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else
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ret = ARCHIVE_FATAL;
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}
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return (ret);
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}
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/* Note: The "warn" return is just to inform the options
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* supervisor that we didn't handle it. It will generate
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* a suitable error if no one used this option. */
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return (ARCHIVE_WARN);
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}
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static int
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archive_write_ustar_header(struct archive_write *a, struct archive_entry *entry)
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{
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char buff[512];
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int ret, ret2;
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struct ustar *ustar;
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struct archive_entry *entry_main;
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struct archive_string_conv *sconv;
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ustar = (struct ustar *)a->format_data;
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/* Setup default string conversion. */
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if (ustar->opt_sconv == NULL) {
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if (!ustar->init_default_conversion) {
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ustar->sconv_default =
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archive_string_default_conversion_for_write(&(a->archive));
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ustar->init_default_conversion = 1;
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}
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sconv = ustar->sconv_default;
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} else
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sconv = ustar->opt_sconv;
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/* Sanity check. */
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if (archive_entry_pathname(entry) == NULL) {
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archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
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"Can't record entry in tar file without pathname");
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return (ARCHIVE_FAILED);
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}
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/* Only regular files (not hardlinks) have data. */
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if (archive_entry_hardlink(entry) != NULL ||
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archive_entry_symlink(entry) != NULL ||
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!(archive_entry_filetype(entry) == AE_IFREG))
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archive_entry_set_size(entry, 0);
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if (AE_IFDIR == archive_entry_filetype(entry)) {
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const char *p;
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size_t path_length;
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/*
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* Ensure a trailing '/'. Modify the entry so
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* the client sees the change.
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*/
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#if defined(_WIN32) && !defined(__CYGWIN__)
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const wchar_t *wp;
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wp = archive_entry_pathname_w(entry);
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if (wp != NULL && wp[wcslen(wp) -1] != L'/') {
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struct archive_wstring ws;
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archive_string_init(&ws);
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path_length = wcslen(wp);
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if (archive_wstring_ensure(&ws,
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path_length + 2) == NULL) {
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archive_set_error(&a->archive, ENOMEM,
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"Can't allocate ustar data");
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archive_wstring_free(&ws);
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return(ARCHIVE_FATAL);
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}
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/* Should we keep '\' ? */
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if (wp[path_length -1] == L'\\')
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path_length--;
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archive_wstrncpy(&ws, wp, path_length);
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archive_wstrappend_wchar(&ws, L'/');
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archive_entry_copy_pathname_w(entry, ws.s);
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archive_wstring_free(&ws);
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p = NULL;
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} else
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#endif
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p = archive_entry_pathname(entry);
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/*
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* On Windows, this is a backup operation just in
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* case getting WCS failed. On POSIX, this is a
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* normal operation.
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*/
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if (p != NULL && p[0] != '\0' && p[strlen(p) - 1] != '/') {
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struct archive_string as;
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archive_string_init(&as);
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path_length = strlen(p);
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if (archive_string_ensure(&as,
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path_length + 2) == NULL) {
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archive_set_error(&a->archive, ENOMEM,
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"Can't allocate ustar data");
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archive_string_free(&as);
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return(ARCHIVE_FATAL);
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}
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#if defined(_WIN32) && !defined(__CYGWIN__)
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/* NOTE: This might break the pathname
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* if the current code page is CP932 and
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* the pathname includes a character '\'
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* as a part of its multibyte pathname. */
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if (p[strlen(p) -1] == '\\')
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path_length--;
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else
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#endif
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archive_strncpy(&as, p, path_length);
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archive_strappend_char(&as, '/');
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archive_entry_copy_pathname(entry, as.s);
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archive_string_free(&as);
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}
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}
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#if defined(_WIN32) && !defined(__CYGWIN__)
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/* Make sure the path separators in pathname, hardlink and symlink
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* are all slash '/', not the Windows path separator '\'. */
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entry_main = __la_win_entry_in_posix_pathseparator(entry);
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if (entry_main == NULL) {
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archive_set_error(&a->archive, ENOMEM,
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"Can't allocate ustar data");
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return(ARCHIVE_FATAL);
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}
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if (entry != entry_main)
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entry = entry_main;
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else
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entry_main = NULL;
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#else
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entry_main = NULL;
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#endif
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ret = __archive_write_format_header_ustar(a, buff, entry, -1, 1, sconv);
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if (ret < ARCHIVE_WARN) {
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archive_entry_free(entry_main);
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return (ret);
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}
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ret2 = __archive_write_output(a, buff, 512);
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if (ret2 < ARCHIVE_WARN) {
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archive_entry_free(entry_main);
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return (ret2);
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}
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if (ret2 < ret)
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ret = ret2;
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ustar->entry_bytes_remaining = archive_entry_size(entry);
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ustar->entry_padding = 0x1ff & (-(int64_t)ustar->entry_bytes_remaining);
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archive_entry_free(entry_main);
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return (ret);
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}
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/*
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* Format a basic 512-byte "ustar" header.
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*
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* Returns -1 if format failed (due to field overflow).
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* Note that this always formats as much of the header as possible.
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* If "strict" is set to zero, it will extend numeric fields as
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* necessary (overwriting terminators or using base-256 extensions).
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*
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* This is exported so that other 'tar' formats can use it.
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*/
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int
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__archive_write_format_header_ustar(struct archive_write *a, char h[512],
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struct archive_entry *entry, int tartype, int strict,
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struct archive_string_conv *sconv)
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{
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unsigned int checksum;
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int i, r, ret;
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size_t copy_length;
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const char *p, *pp;
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int mytartype;
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ret = 0;
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mytartype = -1;
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/*
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* The "template header" already includes the "ustar"
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* signature, various end-of-field markers and other required
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* elements.
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*/
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memcpy(h, &template_header, 512);
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/*
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* Because the block is already null-filled, and strings
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* are allowed to exactly fill their destination (without null),
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* I use memcpy(dest, src, strlen()) here a lot to copy strings.
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*/
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r = archive_entry_pathname_l(entry, &pp, ©_length, sconv);
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if (r != 0) {
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if (errno == ENOMEM) {
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archive_set_error(&a->archive, ENOMEM,
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"Can't allocate memory for Pathname");
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return (ARCHIVE_FATAL);
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}
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archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
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"Can't translate pathname '%s' to %s",
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pp, archive_string_conversion_charset_name(sconv));
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ret = ARCHIVE_WARN;
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}
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if (copy_length <= USTAR_name_size)
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memcpy(h + USTAR_name_offset, pp, copy_length);
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else {
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/* Store in two pieces, splitting at a '/'. */
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p = strchr(pp + copy_length - USTAR_name_size - 1, '/');
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/*
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* Look for the next '/' if we chose the first character
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* as the separator. (ustar format doesn't permit
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* an empty prefix.)
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*/
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if (p == pp)
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p = strchr(p + 1, '/');
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/* Fail if the name won't fit. */
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if (!p) {
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/* No separator. */
|
|
archive_set_error(&a->archive, ENAMETOOLONG,
|
|
"Pathname too long");
|
|
ret = ARCHIVE_FAILED;
|
|
} else if (p[1] == '\0') {
|
|
/*
|
|
* The only feasible separator is a final '/';
|
|
* this would result in a non-empty prefix and
|
|
* an empty name, which POSIX doesn't
|
|
* explicitly forbid, but it just feels wrong.
|
|
*/
|
|
archive_set_error(&a->archive, ENAMETOOLONG,
|
|
"Pathname too long");
|
|
ret = ARCHIVE_FAILED;
|
|
} else if (p > pp + USTAR_prefix_size) {
|
|
/* Prefix is too long. */
|
|
archive_set_error(&a->archive, ENAMETOOLONG,
|
|
"Pathname too long");
|
|
ret = ARCHIVE_FAILED;
|
|
} else {
|
|
/* Copy prefix and remainder to appropriate places */
|
|
memcpy(h + USTAR_prefix_offset, pp, p - pp);
|
|
memcpy(h + USTAR_name_offset, p + 1,
|
|
pp + copy_length - p - 1);
|
|
}
|
|
}
|
|
|
|
r = archive_entry_hardlink_l(entry, &p, ©_length, sconv);
|
|
if (r != 0) {
|
|
if (errno == ENOMEM) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate memory for Linkname");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
archive_set_error(&a->archive,
|
|
ARCHIVE_ERRNO_FILE_FORMAT,
|
|
"Can't translate linkname '%s' to %s",
|
|
p, archive_string_conversion_charset_name(sconv));
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
if (copy_length > 0)
|
|
mytartype = '1';
|
|
else {
|
|
r = archive_entry_symlink_l(entry, &p, ©_length, sconv);
|
|
if (r != 0) {
|
|
if (errno == ENOMEM) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate memory for Linkname");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
archive_set_error(&a->archive,
|
|
ARCHIVE_ERRNO_FILE_FORMAT,
|
|
"Can't translate linkname '%s' to %s",
|
|
p, archive_string_conversion_charset_name(sconv));
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
}
|
|
if (copy_length > 0) {
|
|
if (copy_length > USTAR_linkname_size) {
|
|
archive_set_error(&a->archive, ENAMETOOLONG,
|
|
"Link contents too long");
|
|
ret = ARCHIVE_FAILED;
|
|
copy_length = USTAR_linkname_size;
|
|
}
|
|
memcpy(h + USTAR_linkname_offset, p, copy_length);
|
|
}
|
|
|
|
r = archive_entry_uname_l(entry, &p, ©_length, sconv);
|
|
if (r != 0) {
|
|
if (errno == ENOMEM) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate memory for Uname");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
archive_set_error(&a->archive,
|
|
ARCHIVE_ERRNO_FILE_FORMAT,
|
|
"Can't translate uname '%s' to %s",
|
|
p, archive_string_conversion_charset_name(sconv));
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
if (copy_length > 0) {
|
|
if (copy_length > USTAR_uname_size) {
|
|
if (tartype != 'x') {
|
|
archive_set_error(&a->archive,
|
|
ARCHIVE_ERRNO_MISC, "Username too long");
|
|
ret = ARCHIVE_FAILED;
|
|
}
|
|
copy_length = USTAR_uname_size;
|
|
}
|
|
memcpy(h + USTAR_uname_offset, p, copy_length);
|
|
}
|
|
|
|
r = archive_entry_gname_l(entry, &p, ©_length, sconv);
|
|
if (r != 0) {
|
|
if (errno == ENOMEM) {
|
|
archive_set_error(&a->archive, ENOMEM,
|
|
"Can't allocate memory for Gname");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
archive_set_error(&a->archive,
|
|
ARCHIVE_ERRNO_FILE_FORMAT,
|
|
"Can't translate gname '%s' to %s",
|
|
p, archive_string_conversion_charset_name(sconv));
|
|
ret = ARCHIVE_WARN;
|
|
}
|
|
if (copy_length > 0) {
|
|
if (strlen(p) > USTAR_gname_size) {
|
|
if (tartype != 'x') {
|
|
archive_set_error(&a->archive,
|
|
ARCHIVE_ERRNO_MISC, "Group name too long");
|
|
ret = ARCHIVE_FAILED;
|
|
}
|
|
copy_length = USTAR_gname_size;
|
|
}
|
|
memcpy(h + USTAR_gname_offset, p, copy_length);
|
|
}
|
|
|
|
if (format_number(archive_entry_mode(entry) & 07777,
|
|
h + USTAR_mode_offset, USTAR_mode_size, USTAR_mode_max_size, strict)) {
|
|
archive_set_error(&a->archive, ERANGE,
|
|
"Numeric mode too large");
|
|
ret = ARCHIVE_FAILED;
|
|
}
|
|
|
|
if (format_number(archive_entry_uid(entry),
|
|
h + USTAR_uid_offset, USTAR_uid_size, USTAR_uid_max_size, strict)) {
|
|
archive_set_error(&a->archive, ERANGE,
|
|
"Numeric user ID too large");
|
|
ret = ARCHIVE_FAILED;
|
|
}
|
|
|
|
if (format_number(archive_entry_gid(entry),
|
|
h + USTAR_gid_offset, USTAR_gid_size, USTAR_gid_max_size, strict)) {
|
|
archive_set_error(&a->archive, ERANGE,
|
|
"Numeric group ID too large");
|
|
ret = ARCHIVE_FAILED;
|
|
}
|
|
|
|
if (format_number(archive_entry_size(entry),
|
|
h + USTAR_size_offset, USTAR_size_size, USTAR_size_max_size, strict)) {
|
|
archive_set_error(&a->archive, ERANGE,
|
|
"File size out of range");
|
|
ret = ARCHIVE_FAILED;
|
|
}
|
|
|
|
if (format_number(archive_entry_mtime(entry),
|
|
h + USTAR_mtime_offset, USTAR_mtime_size, USTAR_mtime_max_size, strict)) {
|
|
archive_set_error(&a->archive, ERANGE,
|
|
"File modification time too large");
|
|
ret = ARCHIVE_FAILED;
|
|
}
|
|
|
|
if (archive_entry_filetype(entry) == AE_IFBLK
|
|
|| archive_entry_filetype(entry) == AE_IFCHR) {
|
|
if (format_number(archive_entry_rdevmajor(entry),
|
|
h + USTAR_rdevmajor_offset, USTAR_rdevmajor_size,
|
|
USTAR_rdevmajor_max_size, strict)) {
|
|
archive_set_error(&a->archive, ERANGE,
|
|
"Major device number too large");
|
|
ret = ARCHIVE_FAILED;
|
|
}
|
|
|
|
if (format_number(archive_entry_rdevminor(entry),
|
|
h + USTAR_rdevminor_offset, USTAR_rdevminor_size,
|
|
USTAR_rdevminor_max_size, strict)) {
|
|
archive_set_error(&a->archive, ERANGE,
|
|
"Minor device number too large");
|
|
ret = ARCHIVE_FAILED;
|
|
}
|
|
}
|
|
|
|
if (tartype >= 0) {
|
|
h[USTAR_typeflag_offset] = tartype;
|
|
} else if (mytartype >= 0) {
|
|
h[USTAR_typeflag_offset] = mytartype;
|
|
} else {
|
|
switch (archive_entry_filetype(entry)) {
|
|
case AE_IFREG: h[USTAR_typeflag_offset] = '0' ; break;
|
|
case AE_IFLNK: h[USTAR_typeflag_offset] = '2' ; break;
|
|
case AE_IFCHR: h[USTAR_typeflag_offset] = '3' ; break;
|
|
case AE_IFBLK: h[USTAR_typeflag_offset] = '4' ; break;
|
|
case AE_IFDIR: h[USTAR_typeflag_offset] = '5' ; break;
|
|
case AE_IFIFO: h[USTAR_typeflag_offset] = '6' ; break;
|
|
default: /* AE_IFSOCK and unknown */
|
|
__archive_write_entry_filetype_unsupported(
|
|
&a->archive, entry, "ustar");
|
|
ret = ARCHIVE_FAILED;
|
|
}
|
|
}
|
|
|
|
checksum = 0;
|
|
for (i = 0; i < 512; i++)
|
|
checksum += 255 & (unsigned int)h[i];
|
|
h[USTAR_checksum_offset + 6] = '\0'; /* Can't be pre-set in the template. */
|
|
/* h[USTAR_checksum_offset + 7] = ' '; */ /* This is pre-set in the template. */
|
|
format_octal(checksum, h + USTAR_checksum_offset, 6);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Format a number into a field, with some intelligence.
|
|
*/
|
|
static int
|
|
format_number(int64_t v, char *p, int s, int maxsize, int strict)
|
|
{
|
|
int64_t limit;
|
|
|
|
limit = ((int64_t)1 << (s*3));
|
|
|
|
/* "Strict" only permits octal values with proper termination. */
|
|
if (strict)
|
|
return (format_octal(v, p, s));
|
|
|
|
/*
|
|
* In non-strict mode, we allow the number to overwrite one or
|
|
* more bytes of the field termination. Even old tar
|
|
* implementations should be able to handle this with no
|
|
* problem.
|
|
*/
|
|
if (v >= 0) {
|
|
while (s <= maxsize) {
|
|
if (v < limit)
|
|
return (format_octal(v, p, s));
|
|
s++;
|
|
limit <<= 3;
|
|
}
|
|
}
|
|
|
|
/* Base-256 can handle any number, positive or negative. */
|
|
return (format_256(v, p, maxsize));
|
|
}
|
|
|
|
/*
|
|
* Format a number into the specified field using base-256.
|
|
*/
|
|
static int
|
|
format_256(int64_t v, char *p, int s)
|
|
{
|
|
p += s;
|
|
while (s-- > 0) {
|
|
*--p = (char)(v & 0xff);
|
|
v >>= 8;
|
|
}
|
|
*p |= 0x80; /* Set the base-256 marker bit. */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Format a number into the specified field.
|
|
*/
|
|
static int
|
|
format_octal(int64_t v, char *p, int s)
|
|
{
|
|
int len;
|
|
|
|
len = s;
|
|
|
|
/* Octal values can't be negative, so use 0. */
|
|
if (v < 0) {
|
|
while (len-- > 0)
|
|
*p++ = '0';
|
|
return (-1);
|
|
}
|
|
|
|
p += s; /* Start at the end and work backwards. */
|
|
while (s-- > 0) {
|
|
*--p = (char)('0' + (v & 7));
|
|
v >>= 3;
|
|
}
|
|
|
|
if (v == 0)
|
|
return (0);
|
|
|
|
/* If it overflowed, fill field with max value. */
|
|
while (len-- > 0)
|
|
*p++ = '7';
|
|
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
archive_write_ustar_close(struct archive_write *a)
|
|
{
|
|
return (__archive_write_nulls(a, 512*2));
|
|
}
|
|
|
|
static int
|
|
archive_write_ustar_free(struct archive_write *a)
|
|
{
|
|
struct ustar *ustar;
|
|
|
|
ustar = (struct ustar *)a->format_data;
|
|
free(ustar);
|
|
a->format_data = NULL;
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
archive_write_ustar_finish_entry(struct archive_write *a)
|
|
{
|
|
struct ustar *ustar;
|
|
int ret;
|
|
|
|
ustar = (struct ustar *)a->format_data;
|
|
ret = __archive_write_nulls(a,
|
|
(size_t)(ustar->entry_bytes_remaining + ustar->entry_padding));
|
|
ustar->entry_bytes_remaining = ustar->entry_padding = 0;
|
|
return (ret);
|
|
}
|
|
|
|
static ssize_t
|
|
archive_write_ustar_data(struct archive_write *a, const void *buff, size_t s)
|
|
{
|
|
struct ustar *ustar;
|
|
int ret;
|
|
|
|
ustar = (struct ustar *)a->format_data;
|
|
if (s > ustar->entry_bytes_remaining)
|
|
s = (size_t)ustar->entry_bytes_remaining;
|
|
ret = __archive_write_output(a, buff, s);
|
|
ustar->entry_bytes_remaining -= s;
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
return (s);
|
|
}
|