libarchive/test/test_write_format_tar_sparse.c - third_party/libarchive - Git at Google

 /*-
  * Copyright (c) 2003-2010 Tim Kientzle
  * Copyright (c) 2012 Michihiro NAKAJIMA
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #include "test.h"
 __FBSDID("$FreeBSD$");

 static char buff[1000000];

 static void
 test_1(void)
 {
 	struct archive_entry *ae;
 	struct archive *a;
 	size_t used;
 	size_t blocksize;
 	int64_t offset, length;
 	char *buff2;
 	size_t buff2_size = 0x13000;
 	char buff3[1024];
 	long i;

 	assert((buff2 = malloc(buff2_size)) != NULL);
 	/* Repeat the following for a variety of odd blocksizes. */
 	for (blocksize = 1; blocksize < 100000; blocksize += blocksize + 3) {
 		/* Create a new archive in memory. */
 		assert((a = archive_write_new()) != NULL);
 		assertEqualIntA(a, ARCHIVE_OK,
 		    archive_write_set_format_pax(a));
 		assertEqualIntA(a, ARCHIVE_OK,
 		    archive_write_add_filter_none(a));
 		assertEqualIntA(a, ARCHIVE_OK,
 		    archive_write_set_bytes_per_block(a, (int)blocksize));
 		assertEqualIntA(a, ARCHIVE_OK,
 		    archive_write_set_bytes_in_last_block(a, (int)blocksize));
 		assertEqualInt(blocksize,
 		    archive_write_get_bytes_in_last_block(a));
 		assertEqualIntA(a, ARCHIVE_OK,
 		    archive_write_open_memory(a, buff, sizeof(buff), &used));
 		assertEqualInt(blocksize,
 		    archive_write_get_bytes_in_last_block(a));

 		/*
 		 * Write a file to it.
 		 */
 		assert((ae = archive_entry_new()) != NULL);
 		archive_entry_set_mtime(ae, 1, 10);
 		assertEqualInt(1, archive_entry_mtime(ae));
 		assertEqualInt(10, archive_entry_mtime_nsec(ae));
 		archive_entry_copy_pathname(ae, "file");
 		assertEqualString("file", archive_entry_pathname(ae));
 		archive_entry_set_mode(ae, S_IFREG | 0755);
 		assertEqualInt(S_IFREG | 0755, archive_entry_mode(ae));
 		archive_entry_set_size(ae, 0x81000);
 		archive_entry_sparse_add_entry(ae, 0x10000, 0x1000);
 		archive_entry_sparse_add_entry(ae, 0x80000, 0x1000);

 		assertEqualIntA(a, ARCHIVE_OK, archive_write_header(a, ae));
 		archive_entry_free(ae);
 		memset(buff2, 'a', buff2_size);
 		for (i = 0; i < 0x81000;) {
 			size_t ws = buff2_size;
 			if (i + ws > 0x81000)
 				ws = 0x81000 - i;
 			assertEqualInt(ws,
 				archive_write_data(a, buff2, ws));
 			i += (long)ws;
 		}

 		/* Close out the archive. */
 		assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));
 		assertEqualInt(ARCHIVE_OK, archive_write_free(a));

 		/* This calculation gives "the smallest multiple of
 		 * the block size that is at least 11264 bytes". */
 		failure("blocksize=%d", blocksize);
 		assertEqualInt(((11264 - 1)/blocksize+1)*blocksize, used);

 		/*
 		 * Now, read the data back.
 		 */
 		assert((a = archive_read_new()) != NULL);
 		assertEqualIntA(a, ARCHIVE_OK,
 		    archive_read_support_format_all(a));
 		assertEqualIntA(a, ARCHIVE_OK,
 		    archive_read_support_filter_all(a));
 		assertEqualIntA(a, ARCHIVE_OK,
 		    archive_read_open_memory(a, buff, used));

 		assertEqualIntA(a, ARCHIVE_OK,
 		    archive_read_next_header(a, &ae));

 		assertEqualInt(1, archive_entry_mtime(ae));
 		assertEqualInt(10, archive_entry_mtime_nsec(ae));
 		assertEqualInt(0, archive_entry_atime(ae));
 		assertEqualInt(0, archive_entry_ctime(ae));
 		assertEqualString("file", archive_entry_pathname(ae));
 		assertEqualInt(AE_IFREG, archive_entry_filetype(ae));
 		assertEqualInt(AE_IFREG | 0755, archive_entry_mode(ae));
 		assertEqualInt(0x81000, archive_entry_size(ae));
 		/* Verify sparse information. */
 		assertEqualInt(2, archive_entry_sparse_reset(ae));
 		assertEqualInt(0,
 			archive_entry_sparse_next(ae, &offset, &length));
 		assertEqualInt(0x10000, offset);
 		assertEqualInt(0x1000, length);
 		assertEqualInt(0,
 			archive_entry_sparse_next(ae, &offset, &length));
 		assertEqualInt(0x80000, offset);
 		assertEqualInt(0x1000, length);
 		/* Verify file contents. */
 		memset(buff3, 0, sizeof(buff3));
 		for (i = 0; i < 0x10000; i += 1024) {
 			assertEqualInt(1024, archive_read_data(a, buff2, 1024));
 			failure("Read data(0x%lx - 0x%lx) should be all zero",
 			    i, i + 1024);
 			assertEqualMem(buff2, buff3, 1024);
 		}
 		memset(buff3, 'a', sizeof(buff3));
 		for (i = 0x10000; i < 0x11000; i += 1024) {
 			assertEqualInt(1024, archive_read_data(a, buff2, 1024));
 			failure("Read data(0x%lx - 0x%lx) should be all 'a'",
 			    i, i + 1024);
 			assertEqualMem(buff2, buff3, 1024);
 		}
 		memset(buff3, 0, sizeof(buff3));
 		for (i = 0x11000; i < 0x80000; i += 1024) {
 			assertEqualInt(1024, archive_read_data(a, buff2, 1024));
 			failure("Read data(0x%lx - 0x%lx) should be all zero",
 			    i, i + 1024);
 			assertEqualMem(buff2, buff3, 1024);
 		}
 		memset(buff3, 'a', sizeof(buff3));
 		for (i = 0x80000; i < 0x81000; i += 1024) {
 			assertEqualInt(1024, archive_read_data(a, buff2, 1024));
 			failure("Read data(0x%lx - 0x%lx) should be all 'a'",
 			    i, i + 1024);
 			assertEqualMem(buff2, buff3, 1024);
 		}

 		/* Verify the end of the archive. */
 		assertEqualIntA(a, ARCHIVE_EOF,
 		    archive_read_next_header(a, &ae));
 		assertEqualIntA(a, ARCHIVE_OK, archive_read_close(a));
 		assertEqualInt(ARCHIVE_OK, archive_read_free(a));
 	}
 	free(buff2);
 }

 /*
  * Test for the case the full bytes of sparse file data is not written.
  */
 static void
 test_2(void)
 {
 	struct archive_entry *ae;
 	struct archive *a;
 	size_t used;
 	size_t blocksize = 20 * 512;
 	int64_t offset, length;
 	char *buff2;
 	size_t buff2_size = 0x11000;
 	char buff3[1024];
 	long i;

 	assert((buff2 = malloc(buff2_size)) != NULL);
 	/* Create a new archive in memory. */
 	assert((a = archive_write_new()) != NULL);
 	assertEqualIntA(a, ARCHIVE_OK,
 	    archive_write_set_format_pax(a));
 	assertEqualIntA(a, ARCHIVE_OK,
 	    archive_write_add_filter_none(a));
 	assertEqualIntA(a, ARCHIVE_OK,
 	    archive_write_set_bytes_per_block(a, (int)blocksize));
 	assertEqualIntA(a, ARCHIVE_OK,
 	    archive_write_set_bytes_in_last_block(a, (int)blocksize));
 	assertEqualInt(blocksize,
 	    archive_write_get_bytes_in_last_block(a));
 	assertEqualIntA(a, ARCHIVE_OK,
 	    archive_write_open_memory(a, buff, sizeof(buff), &used));
 	assertEqualInt(blocksize,
 	    archive_write_get_bytes_in_last_block(a));

 	/*
 	 * Write a file to it.
 	 */
 	assert((ae = archive_entry_new()) != NULL);
 	archive_entry_set_mtime(ae, 1, 10);
 	assertEqualInt(1, archive_entry_mtime(ae));
 	assertEqualInt(10, archive_entry_mtime_nsec(ae));
 	archive_entry_copy_pathname(ae, "file");
 	assertEqualString("file", archive_entry_pathname(ae));
 	archive_entry_set_mode(ae, S_IFREG | 0755);
 	assertEqualInt(S_IFREG | 0755, archive_entry_mode(ae));
 	archive_entry_set_size(ae, 0x81000);
 	archive_entry_sparse_add_entry(ae, 0x10000, 0x1000);
 	archive_entry_sparse_add_entry(ae, 0x80000, 0x1000);

 	assertEqualIntA(a, ARCHIVE_OK, archive_write_header(a, ae));
 	archive_entry_free(ae);
 	memset(buff2, 'a', buff2_size);
 	/* Write bytes less than it should be. */
 	assertEqualInt(buff2_size, archive_write_data(a, buff2, buff2_size));

 	/* Close out the archive. */
 	assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));
 	assertEqualInt(ARCHIVE_OK, archive_write_free(a));

 	/* This calculation gives "the smallest multiple of
 	 * the block size that is at least 11264 bytes". */
 	failure("blocksize=%d", blocksize);
 	assertEqualInt(((11264 - 1)/blocksize+1)*blocksize, used);

 	/*
 	 * Now, read the data back.
 	 */
 	assert((a = archive_read_new()) != NULL);
 	assertEqualIntA(a, ARCHIVE_OK, archive_read_support_format_all(a));
 	assertEqualIntA(a, ARCHIVE_OK, archive_read_support_filter_all(a));
 	assertEqualIntA(a, ARCHIVE_OK, archive_read_open_memory(a, buff, used));

 	assertEqualIntA(a, ARCHIVE_OK, archive_read_next_header(a, &ae));

 	assertEqualInt(1, archive_entry_mtime(ae));
 	assertEqualInt(10, archive_entry_mtime_nsec(ae));
 	assertEqualInt(0, archive_entry_atime(ae));
 	assertEqualInt(0, archive_entry_ctime(ae));
 	assertEqualString("file", archive_entry_pathname(ae));
 	assertEqualInt(AE_IFREG, archive_entry_filetype(ae));
 	assertEqualInt(AE_IFREG | 0755, archive_entry_mode(ae));
 	assertEqualInt(0x81000, archive_entry_size(ae));
 	/* Verify sparse information. */
 	assertEqualInt(2, archive_entry_sparse_reset(ae));
 	assertEqualInt(0, archive_entry_sparse_next(ae, &offset, &length));
 	assertEqualInt(0x10000, offset);
 	assertEqualInt(0x1000, length);
 	assertEqualInt(0, archive_entry_sparse_next(ae, &offset, &length));
 	assertEqualInt(0x80000, offset);
 	assertEqualInt(0x1000, length);
 	/* Verify file contents. */
 	memset(buff3, 0, sizeof(buff3));
 	for (i = 0; i < 0x10000; i += 1024) {
 		assertEqualInt(1024, archive_read_data(a, buff2, 1024));
 		failure("Read data(0x%lx - 0x%lx) should be all zero",
 		    i, i + 1024);
 		assertEqualMem(buff2, buff3, 1024);
 	}
 	memset(buff3, 'a', sizeof(buff3));
 	for (i = 0x10000; i < 0x11000; i += 1024) {
 		assertEqualInt(1024, archive_read_data(a, buff2, 1024));
 		failure("Read data(0x%lx - 0x%lx) should be all 'a'",
 		    i, i + 1024);
 		assertEqualMem(buff2, buff3, 1024);
 	}
 	memset(buff3, 0, sizeof(buff3));
 	for (i = 0x11000; i < 0x80000; i += 1024) {
 		assertEqualInt(1024, archive_read_data(a, buff2, 1024));
 		failure("Read data(0x%lx - 0x%lx) should be all zero",
 		    i, i + 1024);
 		assertEqualMem(buff2, buff3, 1024);
 	}
 	memset(buff3, 0, sizeof(buff3));
 	for (i = 0x80000; i < 0x81000; i += 1024) {
 		assertEqualInt(1024, archive_read_data(a, buff2, 1024));
 		failure("Read data(0x%lx - 0x%lx) should be all 'a'",
 		    i, i + 1024);
 		assertEqualMem(buff2, buff3, 1024);
 	}

 	/* Verify the end of the archive. */
 	assertEqualIntA(a, ARCHIVE_EOF,
 	    archive_read_next_header(a, &ae));
 	assertEqualIntA(a, ARCHIVE_OK, archive_read_close(a));
 	assertEqualInt(ARCHIVE_OK, archive_read_free(a));
 	free(buff2);
 }

 DEFINE_TEST(test_write_format_tar_sparse)
 {
 	/* Test1: archiving sparse files. */
 	test_1();
 	/* Test2: incompletely archiving sparse files. */
 	test_2();
 }
	/*-
	* Copyright (c) 2003-2010 Tim Kientzle
	* Copyright (c) 2012 Michihiro NAKAJIMA
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/
	#include "test.h"
	__FBSDID("$FreeBSD$");

	static char buff[1000000];

	static void
	test_1(void)
	{
	struct archive_entry *ae;
	struct archive *a;
	size_t used;
	size_t blocksize;
	int64_t offset, length;
	char *buff2;
	size_t buff2_size = 0x13000;
	char buff3[1024];
	long i;

	assert((buff2 = malloc(buff2_size)) != NULL);
	/* Repeat the following for a variety of odd blocksizes. */
	for (blocksize = 1; blocksize < 100000; blocksize += blocksize + 3) {
	/* Create a new archive in memory. */
	assert((a = archive_write_new()) != NULL);
	assertEqualIntA(a, ARCHIVE_OK,
	archive_write_set_format_pax(a));
	assertEqualIntA(a, ARCHIVE_OK,
	archive_write_add_filter_none(a));
	assertEqualIntA(a, ARCHIVE_OK,
	archive_write_set_bytes_per_block(a, (int)blocksize));
	assertEqualIntA(a, ARCHIVE_OK,
	archive_write_set_bytes_in_last_block(a, (int)blocksize));
	assertEqualInt(blocksize,
	archive_write_get_bytes_in_last_block(a));
	assertEqualIntA(a, ARCHIVE_OK,
	archive_write_open_memory(a, buff, sizeof(buff), &used));
	assertEqualInt(blocksize,
	archive_write_get_bytes_in_last_block(a));

	/*
	* Write a file to it.
	*/
	assert((ae = archive_entry_new()) != NULL);
	archive_entry_set_mtime(ae, 1, 10);
	assertEqualInt(1, archive_entry_mtime(ae));
	assertEqualInt(10, archive_entry_mtime_nsec(ae));
	archive_entry_copy_pathname(ae, "file");
	assertEqualString("file", archive_entry_pathname(ae));
	archive_entry_set_mode(ae, S_IFREG \| 0755);
	assertEqualInt(S_IFREG \| 0755, archive_entry_mode(ae));
	archive_entry_set_size(ae, 0x81000);
	archive_entry_sparse_add_entry(ae, 0x10000, 0x1000);
	archive_entry_sparse_add_entry(ae, 0x80000, 0x1000);

	assertEqualIntA(a, ARCHIVE_OK, archive_write_header(a, ae));
	archive_entry_free(ae);
	memset(buff2, 'a', buff2_size);
	for (i = 0; i < 0x81000;) {
	size_t ws = buff2_size;
	if (i + ws > 0x81000)
	ws = 0x81000 - i;
	assertEqualInt(ws,
	archive_write_data(a, buff2, ws));
	i += (long)ws;
	}

	/* Close out the archive. */
	assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));
	assertEqualInt(ARCHIVE_OK, archive_write_free(a));

	/* This calculation gives "the smallest multiple of
	* the block size that is at least 11264 bytes". */
	failure("blocksize=%d", blocksize);
	assertEqualInt(((11264 - 1)/blocksize+1)*blocksize, used);

	/*
	* Now, read the data back.
	*/
	assert((a = archive_read_new()) != NULL);
	assertEqualIntA(a, ARCHIVE_OK,
	archive_read_support_format_all(a));
	assertEqualIntA(a, ARCHIVE_OK,
	archive_read_support_filter_all(a));
	assertEqualIntA(a, ARCHIVE_OK,
	archive_read_open_memory(a, buff, used));

	assertEqualIntA(a, ARCHIVE_OK,
	archive_read_next_header(a, &ae));

	assertEqualInt(1, archive_entry_mtime(ae));
	assertEqualInt(10, archive_entry_mtime_nsec(ae));
	assertEqualInt(0, archive_entry_atime(ae));
	assertEqualInt(0, archive_entry_ctime(ae));
	assertEqualString("file", archive_entry_pathname(ae));
	assertEqualInt(AE_IFREG, archive_entry_filetype(ae));
	assertEqualInt(AE_IFREG \| 0755, archive_entry_mode(ae));
	assertEqualInt(0x81000, archive_entry_size(ae));
	/* Verify sparse information. */
	assertEqualInt(2, archive_entry_sparse_reset(ae));
	assertEqualInt(0,
	archive_entry_sparse_next(ae, &offset, &length));
	assertEqualInt(0x10000, offset);
	assertEqualInt(0x1000, length);
	assertEqualInt(0,
	archive_entry_sparse_next(ae, &offset, &length));
	assertEqualInt(0x80000, offset);
	assertEqualInt(0x1000, length);
	/* Verify file contents. */
	memset(buff3, 0, sizeof(buff3));
	for (i = 0; i < 0x10000; i += 1024) {
	assertEqualInt(1024, archive_read_data(a, buff2, 1024));
	failure("Read data(0x%lx - 0x%lx) should be all zero",
	i, i + 1024);
	assertEqualMem(buff2, buff3, 1024);
	}
	memset(buff3, 'a', sizeof(buff3));
	for (i = 0x10000; i < 0x11000; i += 1024) {
	assertEqualInt(1024, archive_read_data(a, buff2, 1024));
	failure("Read data(0x%lx - 0x%lx) should be all 'a'",
	i, i + 1024);
	assertEqualMem(buff2, buff3, 1024);
	}
	memset(buff3, 0, sizeof(buff3));
	for (i = 0x11000; i < 0x80000; i += 1024) {
	assertEqualInt(1024, archive_read_data(a, buff2, 1024));
	failure("Read data(0x%lx - 0x%lx) should be all zero",
	i, i + 1024);
	assertEqualMem(buff2, buff3, 1024);
	}
	memset(buff3, 'a', sizeof(buff3));
	for (i = 0x80000; i < 0x81000; i += 1024) {
	assertEqualInt(1024, archive_read_data(a, buff2, 1024));
	failure("Read data(0x%lx - 0x%lx) should be all 'a'",
	i, i + 1024);
	assertEqualMem(buff2, buff3, 1024);
	}

	/* Verify the end of the archive. */
	assertEqualIntA(a, ARCHIVE_EOF,
	archive_read_next_header(a, &ae));
	assertEqualIntA(a, ARCHIVE_OK, archive_read_close(a));
	assertEqualInt(ARCHIVE_OK, archive_read_free(a));
	}
	free(buff2);
	}

	/*
	* Test for the case the full bytes of sparse file data is not written.
	*/
	static void
	test_2(void)
	{
	struct archive_entry *ae;
	struct archive *a;
	size_t used;
	size_t blocksize = 20 * 512;
	int64_t offset, length;
	char *buff2;
	size_t buff2_size = 0x11000;
	char buff3[1024];
	long i;

	assert((buff2 = malloc(buff2_size)) != NULL);
	/* Create a new archive in memory. */
	assert((a = archive_write_new()) != NULL);
	assertEqualIntA(a, ARCHIVE_OK,
	archive_write_set_format_pax(a));
	assertEqualIntA(a, ARCHIVE_OK,
	archive_write_add_filter_none(a));
	assertEqualIntA(a, ARCHIVE_OK,
	archive_write_set_bytes_per_block(a, (int)blocksize));
	assertEqualIntA(a, ARCHIVE_OK,
	archive_write_set_bytes_in_last_block(a, (int)blocksize));
	assertEqualInt(blocksize,
	archive_write_get_bytes_in_last_block(a));
	assertEqualIntA(a, ARCHIVE_OK,
	archive_write_open_memory(a, buff, sizeof(buff), &used));
	assertEqualInt(blocksize,
	archive_write_get_bytes_in_last_block(a));

	/*
	* Write a file to it.
	*/
	assert((ae = archive_entry_new()) != NULL);
	archive_entry_set_mtime(ae, 1, 10);
	assertEqualInt(1, archive_entry_mtime(ae));
	assertEqualInt(10, archive_entry_mtime_nsec(ae));
	archive_entry_copy_pathname(ae, "file");
	assertEqualString("file", archive_entry_pathname(ae));
	archive_entry_set_mode(ae, S_IFREG \| 0755);
	assertEqualInt(S_IFREG \| 0755, archive_entry_mode(ae));
	archive_entry_set_size(ae, 0x81000);
	archive_entry_sparse_add_entry(ae, 0x10000, 0x1000);
	archive_entry_sparse_add_entry(ae, 0x80000, 0x1000);

	assertEqualIntA(a, ARCHIVE_OK, archive_write_header(a, ae));
	archive_entry_free(ae);
	memset(buff2, 'a', buff2_size);
	/* Write bytes less than it should be. */
	assertEqualInt(buff2_size, archive_write_data(a, buff2, buff2_size));

	/* Close out the archive. */
	assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));
	assertEqualInt(ARCHIVE_OK, archive_write_free(a));

	/* This calculation gives "the smallest multiple of
	* the block size that is at least 11264 bytes". */
	failure("blocksize=%d", blocksize);
	assertEqualInt(((11264 - 1)/blocksize+1)*blocksize, used);

	/*
	* Now, read the data back.
	*/
	assert((a = archive_read_new()) != NULL);
	assertEqualIntA(a, ARCHIVE_OK, archive_read_support_format_all(a));
	assertEqualIntA(a, ARCHIVE_OK, archive_read_support_filter_all(a));
	assertEqualIntA(a, ARCHIVE_OK, archive_read_open_memory(a, buff, used));

	assertEqualIntA(a, ARCHIVE_OK, archive_read_next_header(a, &ae));

	assertEqualInt(1, archive_entry_mtime(ae));
	assertEqualInt(10, archive_entry_mtime_nsec(ae));
	assertEqualInt(0, archive_entry_atime(ae));
	assertEqualInt(0, archive_entry_ctime(ae));
	assertEqualString("file", archive_entry_pathname(ae));
	assertEqualInt(AE_IFREG, archive_entry_filetype(ae));
	assertEqualInt(AE_IFREG \| 0755, archive_entry_mode(ae));
	assertEqualInt(0x81000, archive_entry_size(ae));
	/* Verify sparse information. */
	assertEqualInt(2, archive_entry_sparse_reset(ae));
	assertEqualInt(0, archive_entry_sparse_next(ae, &offset, &length));
	assertEqualInt(0x10000, offset);
	assertEqualInt(0x1000, length);
	assertEqualInt(0, archive_entry_sparse_next(ae, &offset, &length));
	assertEqualInt(0x80000, offset);
	assertEqualInt(0x1000, length);
	/* Verify file contents. */
	memset(buff3, 0, sizeof(buff3));
	for (i = 0; i < 0x10000; i += 1024) {
	assertEqualInt(1024, archive_read_data(a, buff2, 1024));
	failure("Read data(0x%lx - 0x%lx) should be all zero",
	i, i + 1024);
	assertEqualMem(buff2, buff3, 1024);
	}
	memset(buff3, 'a', sizeof(buff3));
	for (i = 0x10000; i < 0x11000; i += 1024) {
	assertEqualInt(1024, archive_read_data(a, buff2, 1024));
	failure("Read data(0x%lx - 0x%lx) should be all 'a'",
	i, i + 1024);
	assertEqualMem(buff2, buff3, 1024);
	}
	memset(buff3, 0, sizeof(buff3));
	for (i = 0x11000; i < 0x80000; i += 1024) {
	assertEqualInt(1024, archive_read_data(a, buff2, 1024));
	failure("Read data(0x%lx - 0x%lx) should be all zero",
	i, i + 1024);
	assertEqualMem(buff2, buff3, 1024);
	}
	memset(buff3, 0, sizeof(buff3));
	for (i = 0x80000; i < 0x81000; i += 1024) {
	assertEqualInt(1024, archive_read_data(a, buff2, 1024));
	failure("Read data(0x%lx - 0x%lx) should be all 'a'",
	i, i + 1024);
	assertEqualMem(buff2, buff3, 1024);
	}

	/* Verify the end of the archive. */
	assertEqualIntA(a, ARCHIVE_EOF,
	archive_read_next_header(a, &ae));
	assertEqualIntA(a, ARCHIVE_OK, archive_read_close(a));
	assertEqualInt(ARCHIVE_OK, archive_read_free(a));
	free(buff2);
	}

	DEFINE_TEST(test_write_format_tar_sparse)
	{
	/* Test1: archiving sparse files. */
	test_1();
	/* Test2: incompletely archiving sparse files. */
	test_2();
	}