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https://github.com/freebsd/freebsd-src.git
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e2421f7667
corrections to the Windows support to reconcile differences between Visual Studio and Cygwin. Includes parts of revisions 757, 774, 787, 815, 817, 819, 820, 844, and 886. Of particular note, r886 overhauled the UTF-8/Unicode conversions to work correctly regardless of whether the local system uses 16-bit or 32-bit wchar_t. (I assume that systems with 16-bit wchar_t use UTF-16 and those with 32-bit wchar_t use UCS-4.) This revision also added a preference for wcrtomb() (which is thread-safe) on platforms that support it.
313 lines
8.5 KiB
C
313 lines
8.5 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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#include "test.h"
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__FBSDID("$FreeBSD$");
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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/*
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* This is a somewhat tricky test that verifies the ability to
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* write and read very large entries to tar archives. It
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* writes entries from 2GB up to 1TB to an archive in memory.
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* The memory storage here carefully avoids actually storing
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* any part of the file bodies, so it runs very quickly and requires
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* very little memory. If you're willing to wait a few minutes,
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* you should be able to exercise petabyte entries with this code.
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*/
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/*
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* Each file is built up by duplicating the following block.
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*/
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static size_t filedatasize;
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static void *filedata;
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/*
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* We store the archive as blocks of data generated by libarchive,
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* each possibly followed by bytes of file data.
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*/
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struct memblock {
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struct memblock *next;
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size_t size;
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void *buff;
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int64_t filebytes;
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};
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/*
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* The total memory store is just a list of memblocks plus
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* some accounting overhead.
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*/
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struct memdata {
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int64_t filebytes;
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void *buff;
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struct memblock *first;
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struct memblock *last;
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};
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/* The following size definitions simplify things below. */
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#define KB ((int64_t)1024)
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#define MB ((int64_t)1024 * KB)
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#define GB ((int64_t)1024 * MB)
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#define TB ((int64_t)1024 * GB)
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#if ARCHIVE_VERSION_NUMBER < 2000000
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static ssize_t memory_read_skip(struct archive *, void *, size_t request);
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#else
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static off_t memory_read_skip(struct archive *, void *, off_t request);
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#endif
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static ssize_t memory_read(struct archive *, void *, const void **buff);
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static ssize_t memory_write(struct archive *, void *, const void *, size_t);
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static ssize_t
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memory_write(struct archive *a, void *_private, const void *buff, size_t size)
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{
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struct memdata *private = _private;
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struct memblock *block;
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(void)a;
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/*
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* Since libarchive tries to behave in a zero-copy manner, if
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* you give a pointer to filedata to the library, a pointer
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* into that data will (usually) pop out here. This way, we
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* can tell the difference between filedata and library header
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* and metadata.
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*/
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if ((const char *)filedata <= (const char *)buff
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&& (const char *)buff < (const char *)filedata + filedatasize) {
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/* We don't need to store a block of file data. */
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private->last->filebytes += (int64_t)size;
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} else {
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/* Yes, we're assuming the very first write is metadata. */
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/* It's header or metadata, copy and save it. */
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block = (struct memblock *)malloc(sizeof(*block));
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memset(block, 0, sizeof(*block));
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block->size = size;
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block->buff = malloc(size);
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memcpy(block->buff, buff, size);
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if (private->last == NULL) {
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private->first = private->last = block;
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} else {
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private->last->next = block;
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private->last = block;
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}
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block->next = NULL;
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}
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return ((long)size);
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}
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static ssize_t
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memory_read(struct archive *a, void *_private, const void **buff)
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{
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struct memdata *private = _private;
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struct memblock *block;
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ssize_t size;
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(void)a;
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free(private->buff);
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private->buff = NULL;
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if (private->first == NULL) {
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private->last = NULL;
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return (ARCHIVE_EOF);
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}
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if (private->filebytes > 0) {
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/*
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* We're returning file bytes, simulate it by
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* passing blocks from the template data.
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*/
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if (private->filebytes > (int64_t)filedatasize)
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size = (ssize_t)filedatasize;
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else
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size = (ssize_t)private->filebytes;
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private->filebytes -= size;
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*buff = filedata;
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} else {
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/*
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* We need to get some real data to return.
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*/
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block = private->first;
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private->first = block->next;
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size = (ssize_t)block->size;
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if (block->buff != NULL) {
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private->buff = block->buff;
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*buff = block->buff;
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} else {
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private->buff = NULL;
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*buff = filedata;
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}
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private->filebytes = block->filebytes;
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free(block);
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}
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return (size);
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}
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#if ARCHIVE_VERSION_NUMBER < 2000000
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static ssize_t
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memory_read_skip(struct archive *a, void *private, size_t skip)
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{
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(void)a; /* UNUSED */
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(void)private; /* UNUSED */
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(void)skip; /* UNUSED */
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return (0);
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}
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#else
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static off_t
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memory_read_skip(struct archive *a, void *_private, off_t skip)
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{
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struct memdata *private = _private;
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(void)a;
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if (private->first == NULL) {
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private->last = NULL;
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return (0);
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}
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if (private->filebytes > 0) {
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if (private->filebytes < skip)
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skip = private->filebytes;
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private->filebytes -= skip;
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} else {
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skip = 0;
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}
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return (skip);
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}
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#endif
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DEFINE_TEST(test_tar_large)
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{
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/* The sizes of the entries we're going to generate. */
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static int64_t tests[] = {
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/* Test for 32-bit signed overflow. */
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2 * GB - 1, 2 * GB, 2 * GB + 1,
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/* Test for 32-bit unsigned overflow. */
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4 * GB - 1, 4 * GB, 4 * GB + 1,
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/* 8GB is the "official" max for ustar. */
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8 * GB - 1, 8 * GB, 8 * GB + 1,
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/* Bend ustar a tad and you can get 64GB (12 octal digits). */
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64 * GB - 1, 64 * GB,
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/* And larger entries that require non-ustar extensions. */
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256 * GB, 1 * TB, 0 };
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int i;
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char namebuff[64];
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struct memdata memdata;
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struct archive_entry *ae;
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struct archive *a;
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int64_t filesize;
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size_t writesize;
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filedatasize = (size_t)(1 * MB);
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filedata = malloc(filedatasize);
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memset(filedata, 0xAA, filedatasize);
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memset(&memdata, 0, sizeof(memdata));
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/*
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* Open an archive for writing.
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*/
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a = archive_write_new();
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archive_write_set_format_pax_restricted(a);
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archive_write_set_bytes_per_block(a, 0); /* No buffering. */
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archive_write_open(a, &memdata, NULL, memory_write, NULL);
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/*
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* Write a series of large files to it.
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*/
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for (i = 0; tests[i] != 0; i++) {
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assert((ae = archive_entry_new()) != NULL);
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sprintf(namebuff, "file_%d", i);
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archive_entry_copy_pathname(ae, namebuff);
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archive_entry_set_mode(ae, S_IFREG | 0755);
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filesize = tests[i];
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archive_entry_set_size(ae, filesize);
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assertA(0 == archive_write_header(a, ae));
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archive_entry_free(ae);
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/*
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* Write the actual data to the archive.
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*/
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while (filesize > 0) {
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writesize = filedatasize;
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if ((int64_t)writesize > filesize)
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writesize = (size_t)filesize;
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assertA((int)writesize
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== archive_write_data(a, filedata, writesize));
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filesize -= writesize;
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}
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}
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assert((ae = archive_entry_new()) != NULL);
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archive_entry_copy_pathname(ae, "lastfile");
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archive_entry_set_mode(ae, S_IFREG | 0755);
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assertA(0 == archive_write_header(a, ae));
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archive_entry_free(ae);
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/* Close out the archive. */
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assertA(0 == archive_write_close(a));
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#if ARCHIVE_VERSION_NUMBER < 2000000
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archive_write_finish(a);
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#else
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assertA(0 == archive_write_finish(a));
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#endif
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/*
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* Open the same archive for reading.
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*/
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a = archive_read_new();
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archive_read_support_format_tar(a);
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archive_read_open2(a, &memdata, NULL,
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memory_read, memory_read_skip, NULL);
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/*
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* Read entries back.
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*/
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for (i = 0; tests[i] > 0; i++) {
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assertEqualIntA(a, 0, archive_read_next_header(a, &ae));
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sprintf(namebuff, "file_%d", i);
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assertEqualString(namebuff, archive_entry_pathname(ae));
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assert(tests[i] == archive_entry_size(ae));
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}
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assertEqualIntA(a, 0, archive_read_next_header(a, &ae));
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assertEqualString("lastfile", archive_entry_pathname(ae));
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assertEqualIntA(a, ARCHIVE_EOF, archive_read_next_header(a, &ae));
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/* Close out the archive. */
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assertA(0 == archive_read_close(a));
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#if ARCHIVE_VERSION_NUMBER < 2000000
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archive_read_finish(a);
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#else
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assertA(0 == archive_read_finish(a));
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#endif
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free(memdata.buff);
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free(filedata);
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}
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