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test_strip_components.c revision 1.1.1.5 
      1 /*-
      2  * SPDX-License-Identifier: BSD-2-Clause
      3  *
      4  * Copyright (c) 2003-2007 Tim Kientzle
      5  * All rights reserved.
      6  */
      7 #include "test.h"
      8 
      9 DEFINE_TEST(test_strip_components)
     10 {
     11 	assertMakeDir("d0", 0755);
     12 	assertChdir("d0");
     13 	assertMakeDir("d1", 0755);
     14 	assertMakeDir("d1/d2", 0755);
     15 	assertMakeDir("d1/d2/d3", 0755);
     16 	assertMakeFile("d1/d2/f1", 0644, "");
     17 	assertMakeHardlink("l1", "d1/d2/f1");
     18 	assertMakeHardlink("d1/l2", "d1/d2/f1");
     19 	if (canSymlink()) {
     20 		assertMakeSymlink("s1", "d1/d2/f1", 0);
     21 		assertMakeSymlink("d1/s2", "d2/f1", 0);
     22 	}
     23 	assertChdir("..");
     24 
     25 	/*
     26 	 * Test 1: Strip components when extracting archives.
     27 	 */
     28 	if (canSymlink())
     29 		assertEqualInt(0, systemf("%s -cf test.tar d0/l1 d0/s1 d0/d1",
     30 		    testprog));
     31 	else
     32 		assertEqualInt(0, systemf("%s -cf test.tar d0/l1 d0/d1",
     33 		    testprog));
     34 
     35 	assertMakeDir("target", 0755);
     36 	assertEqualInt(0, systemf("%s -x -C target --strip-components 2 "
     37 	    "-f test.tar", testprog));
     38 
     39 	failure("d0/ is too short and should not get restored");
     40 	assertFileNotExists("target/d0");
     41 	failure("d0/d1/ is too short and should not get restored");
     42 	assertFileNotExists("target/d1");
     43 	failure("d0/s1 is too short and should not get restored");
     44 	assertFileNotExists("target/s1");
     45 	failure("d0/d1/s2 is a symlink to something that won't be extracted");
     46 	/* If platform supports symlinks, target/s2 is a broken symlink. */
     47 	/* If platform does not support symlink, target/s2 doesn't exist. */
     48 	if (canSymlink())
     49 		assertIsSymlink("target/s2", "d2/f1", 0);
     50 	else
     51 		assertFileNotExists("target/s2");
     52 	failure("d0/d1/d2 should be extracted");
     53 	assertIsDir("target/d2", -1);
     54 
     55 	/*
     56 	 * Test 1b: Strip components extracting archives involving hardlinks.
     57 	 *
     58 	 * This next is a complicated case.  d0/l1, d0/d1/l2, and
     59 	 * d0/d1/d2/f1 are all hardlinks to the same file; d0/l1 can't
     60 	 * be extracted with --strip-components=2 and the other two
     61 	 * can.  Remember that tar normally stores the first file with
     62 	 * a body and the other as hardlink entries to the first
     63 	 * appearance.  So the final result depends on the order in
     64 	 * which these three names get archived.  If d0/l1 is first,
     65 	 * none of the three can be restored.  If either of the longer
     66 	 * names are first, then the two longer ones can both be
     67 	 * restored.  Note that the "tar -cf" command above explicitly
     68 	 * lists d0/l1 before d0/d1.
     69 	 *
     70 	 * It may be worth extending this test to exercise other
     71 	 * archiving orders.
     72 	 *
     73 	 * Of course, this is all totally different for cpio and newc
     74 	 * formats because the hardlink management is different.
     75 	 * TODO: Rename this to test_strip_components_tar and create
     76 	 * parallel tests for cpio and newc formats.
     77 	 */
     78 	failure("d0/l1 is too short and should not get restored");
     79 	assertFileNotExists("target/l1");
     80 	failure("d0/d1/l2 is a hardlink to file whose name was too short");
     81 	assertFileNotExists("target/l2");
     82 	failure("d0/d1/d2/f1 is a hardlink to file whose name was too short");
     83 	assertFileNotExists("target/d2/f1");
     84 
     85 	/*
     86 	 * Test 2: Strip components when creating archives.
     87 	 */
     88 	if (canSymlink())
     89 		assertEqualInt(0, systemf("%s --strip-components 2 -cf test2.tar "
     90 					"d0/l1 d0/s1 d0/d1", testprog));
     91 	else
     92 		assertEqualInt(0, systemf("%s --strip-components 2 -cf test2.tar "
     93 					"d0/l1 d0/d1", testprog));
     94 
     95 	assertMakeDir("target2", 0755);
     96 	assertEqualInt(0, systemf("%s -x -C target2 -f test2.tar", testprog));
     97 
     98 	failure("d0/ is too short and should not have been archived");
     99 	assertFileNotExists("target2/d0");
    100 	failure("d0/d1/ is too short and should not have been archived");
    101 	assertFileNotExists("target2/d1");
    102 	failure("d0/s1 is too short and should not get restored");
    103 	assertFileNotExists("target/s1");
    104 	/* If platform supports symlinks, target/s2 is included. */
    105 	if (canSymlink()) {
    106 		failure("d0/d1/s2 is a symlink to something included in archive");
    107 		assertIsSymlink("target2/s2", "d2/f1", 0);
    108 	}
    109 	failure("d0/d1/d2 should be archived");
    110 	assertIsDir("target2/d2", -1);
    111 
    112 	/*
    113 	 * Test 2b: Strip components creating archives involving hardlinks.
    114 	 */
    115 	failure("d0/l1 is too short and should not have been archived");
    116 	assertFileNotExists("target/l1");
    117 	failure("d0/d1/l2 is a hardlink to file whose name was too short");
    118 	assertFileNotExists("target/l2");
    119 	failure("d0/d1/d2/f1 is a hardlink to file whose name was too short");
    120 	assertFileNotExists("target/d2/f1");
    121 }
    122