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

 /*-
  * Copyright (c) 2003-2007 Tim Kientzle
  * 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: src/lib/libarchive/test/test_write_disk_hardlink.c,v 1.5 2008/09/05 06:13:11 kientzle Exp $");

 #if defined(_WIN32) && !defined(__CYGWIN__)
 /* Execution bits, Group members bits and others bits do not work. */
 #define UMASK 0177
 #define E_MASK (~0177)
 #else
 #define UMASK 022
 #define E_MASK (~0)
 #endif

 /*
  * Exercise hardlink recreation.
  *
  * File permissions are chosen so that the authoritive entry
  * has the correct permission and the non-authoritive versions
  * are just writeable files.
  */
 DEFINE_TEST(test_write_disk_hardlink)
 {
 #if ARCHIVE_VERSION_NUMBER < 1009000
 	skipping("archive_write_disk_hardlink tests");
 #else
 	static const char data[]="abcdefghijklmnopqrstuvwxyz";
 	struct archive *ad;
 	struct archive_entry *ae;
 	struct stat st, st2;

 	/* Force the umask to something predictable. */
 	umask(UMASK);

 	/* Write entries to disk. */
 	assert((ad = archive_write_disk_new()) != NULL);

 	/*
 	 * First, use a tar-like approach; a regular file, then
 	 * a separate "hardlink" entry.
 	 */

 	/* Regular file. */
 	assert((ae = archive_entry_new()) != NULL);
 	archive_entry_copy_pathname(ae, "link1a");
 	archive_entry_set_mode(ae, S_IFREG | 0755);
 	archive_entry_set_size(ae, sizeof(data));
 	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
 	assertEqualInt(sizeof(data),
 	    archive_write_data(ad, data, sizeof(data)));
 	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
 	archive_entry_free(ae);

 	/* Link.  Size of zero means this doesn't carry data. */
 	assert((ae = archive_entry_new()) != NULL);
 	archive_entry_copy_pathname(ae, "link1b");
 	archive_entry_set_mode(ae, S_IFREG | 0642);
 	archive_entry_set_size(ae, 0);
 	archive_entry_copy_hardlink(ae, "link1a");
 	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
 	assertEqualInt(ARCHIVE_WARN,
 	    archive_write_data(ad, data, sizeof(data)));
 	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
 	archive_entry_free(ae);

 	/*
 	 * Repeat tar approach test, but use unset to mark the
 	 * hardlink as having no data.
 	 */

 	/* Regular file. */
 	assert((ae = archive_entry_new()) != NULL);
 	archive_entry_copy_pathname(ae, "link2a");
 	archive_entry_set_mode(ae, S_IFREG | 0755);
 	archive_entry_set_size(ae, sizeof(data));
 	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
 	assertEqualInt(sizeof(data),
 	    archive_write_data(ad, data, sizeof(data)));
 	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
 	archive_entry_free(ae);

 	/* Link.  Unset size means this doesn't carry data. */
 	assert((ae = archive_entry_new()) != NULL);
 	archive_entry_copy_pathname(ae, "link2b");
 	archive_entry_set_mode(ae, S_IFREG | 0642);
 	archive_entry_unset_size(ae);
 	archive_entry_copy_hardlink(ae, "link2a");
 	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
 	assertEqualInt(ARCHIVE_WARN,
 	    archive_write_data(ad, data, sizeof(data)));
 	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
 	archive_entry_free(ae);

 	/*
 	 * Second, try an old-cpio-like approach; a regular file, then
 	 * another identical one (which has been marked hardlink).
 	 */

 	/* Regular file. */
 	assert((ae = archive_entry_new()) != NULL);
 	archive_entry_copy_pathname(ae, "link3a");
 	archive_entry_set_mode(ae, S_IFREG | 0600);
 	archive_entry_set_size(ae, sizeof(data));
 	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
 	assertEqualInt(sizeof(data), archive_write_data(ad, data, sizeof(data)));
 	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
 	archive_entry_free(ae);

 	/* Link. */
 	assert((ae = archive_entry_new()) != NULL);
 	archive_entry_copy_pathname(ae, "link3b");
 	archive_entry_set_mode(ae, S_IFREG | 0755);
 	archive_entry_set_size(ae, sizeof(data));
 	archive_entry_copy_hardlink(ae, "link3a");
 	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
 	assertEqualInt(sizeof(data), archive_write_data(ad, data, sizeof(data)));
 	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
 	archive_entry_free(ae);

 	/*
 	 * Finally, try a new-cpio-like approach, where the initial
 	 * regular file is empty and the hardlink has the data.
 	 */

 	/* Regular file. */
 	assert((ae = archive_entry_new()) != NULL);
 	archive_entry_copy_pathname(ae, "link4a");
 	archive_entry_set_mode(ae, S_IFREG | 0600);
 	archive_entry_set_size(ae, 0);
 	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
 #if ARCHIVE_VERSION_NUMBER < 3000000
 	assertEqualInt(ARCHIVE_WARN, archive_write_data(ad, data, 1));
 #else
 	assertEqualInt(-1, archive_write_data(ad, data, 1));
 #endif
 	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
 	archive_entry_free(ae);

 	/* Link. */
 	assert((ae = archive_entry_new()) != NULL);
 	archive_entry_copy_pathname(ae, "link4b");
 	archive_entry_set_mode(ae, S_IFREG | 0755);
 	archive_entry_set_size(ae, sizeof(data));
 	archive_entry_copy_hardlink(ae, "link4a");
 	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
 	assertEqualInt(sizeof(data), archive_write_data(ad, data, sizeof(data)));
 	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
 	archive_entry_free(ae);
 #if ARCHIVE_VERSION_NUMBER < 2000000
 	archive_write_finish(ad);
 #else
 	assertEqualInt(0, archive_write_finish(ad));
 #endif

 	/* Test the entries on disk. */

 	/* Test #1 */
 	assert(0 == stat("link1a", &st));
 	/* If the hardlink was successfully created and the archive
 	 * doesn't carry data for it, we consider it to be
 	 * non-authoritive for meta data as well.  This is consistent
 	 * with GNU tar and BSD pax.  */
 	assertEqualInt(st.st_mode & E_MASK, (S_IFREG | 0755) & ~UMASK);
 	assertEqualInt(st.st_size, sizeof(data));
 	assertEqualInt(st.st_nlink, 2);

 	assert(0 == stat("link1b", &st2));
 	assertEqualInt(st.st_mode, st2.st_mode);
 	assertEqualInt(st.st_size, st2.st_size);
 	assertEqualInt(st.st_nlink, st2.st_nlink);
 	assertEqualInt(st.st_ino, st2.st_ino);
 	assertEqualInt(st.st_dev, st2.st_dev);

 	/* Test #2: Should produce identical results to test #1 */
 	/* Note that marking a hardlink with size = 0 is treated the
 	 * same as having an unset size.  This is partly for backwards
 	 * compatibility (we used to not have unset tracking, so
 	 * relied on size == 0) and partly to match the model used by
 	 * common file formats that store a size of zero for
 	 * hardlinks. */
 	assert(0 == stat("link2a", &st));
 	assertEqualInt(st.st_mode & E_MASK, (S_IFREG | 0755) & ~UMASK);
 	assertEqualInt(st.st_size, sizeof(data));
 	assertEqualInt(st.st_nlink, 2);

 	assert(0 == stat("link2b", &st2));
 	assertEqualInt(st.st_mode, st2.st_mode);
 	assertEqualInt(st.st_size, st2.st_size);
 	assertEqualInt(st.st_nlink, st2.st_nlink);
 	assertEqualInt(st.st_ino, st2.st_ino);
 	assertEqualInt(st.st_dev, st2.st_dev);

 	/* Test #3 */
 	assert(0 == stat("link3a", &st));
 	assertEqualInt(st.st_mode & E_MASK, (S_IFREG | 0755) & ~UMASK);
 	assertEqualInt(st.st_size, sizeof(data));
 	assertEqualInt(st.st_nlink, 2);

 	assert(0 == stat("link3b", &st2));
 	assertEqualInt(st2.st_mode & E_MASK, (S_IFREG | 0755) & ~UMASK);
 	assertEqualInt(st2.st_size, sizeof(data));
 	assertEqualInt(st2.st_nlink, 2);
 	assertEqualInt(st.st_ino, st2.st_ino);
 	assertEqualInt(st.st_dev, st2.st_dev);

 	/* Test #4 */
 	assert(0 == stat("link4a", &st));
 	assertEqualInt(st.st_mode & E_MASK, (S_IFREG | 0755) & ~UMASK);
 	assertEqualInt(st.st_size, sizeof(data));
 	assertEqualInt(st.st_nlink, 2);

 	assert(0 == stat("link4b", &st2));
 	assertEqualInt(st2.st_mode & E_MASK, (S_IFREG | 0755) & ~UMASK);
 	assertEqualInt(st2.st_size, sizeof(data));
 	assertEqualInt(st2.st_nlink, 2);
 	assertEqualInt(st.st_ino, st2.st_ino);
 	assertEqualInt(st.st_dev, st2.st_dev);
 #endif
 }
	/*-
	* Copyright (c) 2003-2007 Tim Kientzle
	* 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: src/lib/libarchive/test/test_write_disk_hardlink.c,v 1.5 2008/09/05 06:13:11 kientzle Exp $");

	#if defined(_WIN32) && !defined(__CYGWIN__)
	/* Execution bits, Group members bits and others bits do not work. */
	#define UMASK 0177
	#define E_MASK (~0177)
	#else
	#define UMASK 022
	#define E_MASK (~0)
	#endif

	/*
	* Exercise hardlink recreation.
	*
	* File permissions are chosen so that the authoritive entry
	* has the correct permission and the non-authoritive versions
	* are just writeable files.
	*/
	DEFINE_TEST(test_write_disk_hardlink)
	{
	#if ARCHIVE_VERSION_NUMBER < 1009000
	skipping("archive_write_disk_hardlink tests");
	#else
	static const char data[]="abcdefghijklmnopqrstuvwxyz";
	struct archive *ad;
	struct archive_entry *ae;
	struct stat st, st2;

	/* Force the umask to something predictable. */
	umask(UMASK);

	/* Write entries to disk. */
	assert((ad = archive_write_disk_new()) != NULL);

	/*
	* First, use a tar-like approach; a regular file, then
	* a separate "hardlink" entry.
	*/

	/* Regular file. */
	assert((ae = archive_entry_new()) != NULL);
	archive_entry_copy_pathname(ae, "link1a");
	archive_entry_set_mode(ae, S_IFREG \| 0755);
	archive_entry_set_size(ae, sizeof(data));
	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
	assertEqualInt(sizeof(data),
	archive_write_data(ad, data, sizeof(data)));
	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
	archive_entry_free(ae);

	/* Link. Size of zero means this doesn't carry data. */
	assert((ae = archive_entry_new()) != NULL);
	archive_entry_copy_pathname(ae, "link1b");
	archive_entry_set_mode(ae, S_IFREG \| 0642);
	archive_entry_set_size(ae, 0);
	archive_entry_copy_hardlink(ae, "link1a");
	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
	assertEqualInt(ARCHIVE_WARN,
	archive_write_data(ad, data, sizeof(data)));
	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
	archive_entry_free(ae);

	/*
	* Repeat tar approach test, but use unset to mark the
	* hardlink as having no data.
	*/

	/* Regular file. */
	assert((ae = archive_entry_new()) != NULL);
	archive_entry_copy_pathname(ae, "link2a");
	archive_entry_set_mode(ae, S_IFREG \| 0755);
	archive_entry_set_size(ae, sizeof(data));
	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
	assertEqualInt(sizeof(data),
	archive_write_data(ad, data, sizeof(data)));
	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
	archive_entry_free(ae);

	/* Link. Unset size means this doesn't carry data. */
	assert((ae = archive_entry_new()) != NULL);
	archive_entry_copy_pathname(ae, "link2b");
	archive_entry_set_mode(ae, S_IFREG \| 0642);
	archive_entry_unset_size(ae);
	archive_entry_copy_hardlink(ae, "link2a");
	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
	assertEqualInt(ARCHIVE_WARN,
	archive_write_data(ad, data, sizeof(data)));
	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
	archive_entry_free(ae);

	/*
	* Second, try an old-cpio-like approach; a regular file, then
	* another identical one (which has been marked hardlink).
	*/

	/* Regular file. */
	assert((ae = archive_entry_new()) != NULL);
	archive_entry_copy_pathname(ae, "link3a");
	archive_entry_set_mode(ae, S_IFREG \| 0600);
	archive_entry_set_size(ae, sizeof(data));
	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
	assertEqualInt(sizeof(data), archive_write_data(ad, data, sizeof(data)));
	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
	archive_entry_free(ae);

	/* Link. */
	assert((ae = archive_entry_new()) != NULL);
	archive_entry_copy_pathname(ae, "link3b");
	archive_entry_set_mode(ae, S_IFREG \| 0755);
	archive_entry_set_size(ae, sizeof(data));
	archive_entry_copy_hardlink(ae, "link3a");
	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
	assertEqualInt(sizeof(data), archive_write_data(ad, data, sizeof(data)));
	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
	archive_entry_free(ae);

	/*
	* Finally, try a new-cpio-like approach, where the initial
	* regular file is empty and the hardlink has the data.
	*/

	/* Regular file. */
	assert((ae = archive_entry_new()) != NULL);
	archive_entry_copy_pathname(ae, "link4a");
	archive_entry_set_mode(ae, S_IFREG \| 0600);
	archive_entry_set_size(ae, 0);
	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
	#if ARCHIVE_VERSION_NUMBER < 3000000
	assertEqualInt(ARCHIVE_WARN, archive_write_data(ad, data, 1));
	#else
	assertEqualInt(-1, archive_write_data(ad, data, 1));
	#endif
	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
	archive_entry_free(ae);

	/* Link. */
	assert((ae = archive_entry_new()) != NULL);
	archive_entry_copy_pathname(ae, "link4b");
	archive_entry_set_mode(ae, S_IFREG \| 0755);
	archive_entry_set_size(ae, sizeof(data));
	archive_entry_copy_hardlink(ae, "link4a");
	assertEqualIntA(ad, 0, archive_write_header(ad, ae));
	assertEqualInt(sizeof(data), archive_write_data(ad, data, sizeof(data)));
	assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
	archive_entry_free(ae);
	#if ARCHIVE_VERSION_NUMBER < 2000000
	archive_write_finish(ad);
	#else
	assertEqualInt(0, archive_write_finish(ad));
	#endif

	/* Test the entries on disk. */

	/* Test #1 */
	assert(0 == stat("link1a", &st));
	/* If the hardlink was successfully created and the archive
	* doesn't carry data for it, we consider it to be
	* non-authoritive for meta data as well. This is consistent
	* with GNU tar and BSD pax. */
	assertEqualInt(st.st_mode & E_MASK, (S_IFREG \| 0755) & ~UMASK);
	assertEqualInt(st.st_size, sizeof(data));
	assertEqualInt(st.st_nlink, 2);

	assert(0 == stat("link1b", &st2));
	assertEqualInt(st.st_mode, st2.st_mode);
	assertEqualInt(st.st_size, st2.st_size);
	assertEqualInt(st.st_nlink, st2.st_nlink);
	assertEqualInt(st.st_ino, st2.st_ino);
	assertEqualInt(st.st_dev, st2.st_dev);

	/* Test #2: Should produce identical results to test #1 */
	/* Note that marking a hardlink with size = 0 is treated the
	* same as having an unset size. This is partly for backwards
	* compatibility (we used to not have unset tracking, so
	* relied on size == 0) and partly to match the model used by
	* common file formats that store a size of zero for
	* hardlinks. */
	assert(0 == stat("link2a", &st));
	assertEqualInt(st.st_mode & E_MASK, (S_IFREG \| 0755) & ~UMASK);
	assertEqualInt(st.st_size, sizeof(data));
	assertEqualInt(st.st_nlink, 2);

	assert(0 == stat("link2b", &st2));
	assertEqualInt(st.st_mode, st2.st_mode);
	assertEqualInt(st.st_size, st2.st_size);
	assertEqualInt(st.st_nlink, st2.st_nlink);
	assertEqualInt(st.st_ino, st2.st_ino);
	assertEqualInt(st.st_dev, st2.st_dev);

	/* Test #3 */
	assert(0 == stat("link3a", &st));
	assertEqualInt(st.st_mode & E_MASK, (S_IFREG \| 0755) & ~UMASK);
	assertEqualInt(st.st_size, sizeof(data));
	assertEqualInt(st.st_nlink, 2);

	assert(0 == stat("link3b", &st2));
	assertEqualInt(st2.st_mode & E_MASK, (S_IFREG \| 0755) & ~UMASK);
	assertEqualInt(st2.st_size, sizeof(data));
	assertEqualInt(st2.st_nlink, 2);
	assertEqualInt(st.st_ino, st2.st_ino);
	assertEqualInt(st.st_dev, st2.st_dev);

	/* Test #4 */
	assert(0 == stat("link4a", &st));
	assertEqualInt(st.st_mode & E_MASK, (S_IFREG \| 0755) & ~UMASK);
	assertEqualInt(st.st_size, sizeof(data));
	assertEqualInt(st.st_nlink, 2);

	assert(0 == stat("link4b", &st2));
	assertEqualInt(st2.st_mode & E_MASK, (S_IFREG \| 0755) & ~UMASK);
	assertEqualInt(st2.st_size, sizeof(data));
	assertEqualInt(st2.st_nlink, 2);
	assertEqualInt(st.st_ino, st2.st_ino);
	assertEqualInt(st.st_dev, st2.st_dev);
	#endif
	}