1 /*- 2 * Copyright (c) 2003-2007 Tim Kientzle 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 #include "test.h" 26 __FBSDID("$FreeBSD: src/usr.bin/tar/test/test_strip_components.c,v 1.2 2008/11/10 05:24:13 kientzle Exp $"); 27 28 static int 29 touch(const char *fn) 30 { 31 FILE *f = fopen(fn, "w"); 32 failure("Couldn't create file '%s', errno=%d (%s)\n", 33 fn, errno, strerror(errno)); 34 if (!assert(f != NULL)) 35 return (0); /* Failure. */ 36 fclose(f); 37 return (1); /* Success */ 38 } 39 40 DEFINE_TEST(test_strip_components) 41 { 42 assertMakeDir("d0", 0755); 43 assertChdir("d0"); 44 assertMakeDir("d1", 0755); 45 assertMakeDir("d1/d2", 0755); 46 assertMakeDir("d1/d2/d3", 0755); 47 assertEqualInt(1, touch("d1/d2/f1")); 48 assertMakeHardlink("l1", "d1/d2/f1"); 49 assertMakeHardlink("d1/l2", "d1/d2/f1"); 50 if (canSymlink()) { 51 assertMakeSymlink("s1", "d1/d2/f1"); 52 assertMakeSymlink("d1/s2", "d2/f1"); 53 } 54 assertChdir(".."); 55 56 assertEqualInt(0, systemf("%s -cf test.tar d0", testprog)); 57 58 assertMakeDir("target", 0755); 59 assertEqualInt(0, systemf("%s -x -C target --strip-components 2 " 60 "-f test.tar", testprog)); 61 62 failure("d0/ is too short and should not get restored"); 63 assertFileNotExists("target/d0"); 64 failure("d0/d1/ is too short and should not get restored"); 65 assertFileNotExists("target/d1"); 66 failure("d0/d1/s2 is a symlink to something that won't be extracted"); 67 /* If platform supports symlinks, target/s2 is a broken symlink. */ 68 /* If platform does not support symlink, target/s2 doesn't exist. */ 69 assertFileNotExists("target/s2"); 70 if (canSymlink()) 71 assertIsSymlink("target/s2", "d2/f1"); 72 failure("d0/d1/d2 should be extracted"); 73 assertIsDir("target/d2", -1); 74 75 /* 76 * This next is a complicated case. d0/l1, d0/d1/l2, and 77 * d0/d1/d2/f1 are all hardlinks to the same file; d0/l1 can't 78 * be extracted with --strip-components=2 and the other two 79 * can. Remember that tar normally stores the first file with 80 * a body and the other as hardlink entries to the first 81 * appearance. So the final result depends on the order in 82 * which these three names get archived. If d0/l1 is first, 83 * none of the three can be restored. If either of the longer 84 * names are first, then the two longer ones can both be 85 * restored. 86 * 87 * The tree-walking code used by bsdtar always visits files 88 * before subdirectories, so bsdtar's behavior is fortunately 89 * deterministic: d0/l1 will always get stored first and the 90 * other two will be stored as hardlinks to d0/l1. Since 91 * d0/l1 can't be extracted, none of these three will be 92 * extracted. 93 * 94 * It may be worth extending this test to force a particular 95 * archiving order so as to exercise both of the cases described 96 * above. 97 * 98 * Of course, this is all totally different for cpio and newc 99 * formats because the hardlink management is different. 100 * TODO: Rename this to test_strip_components_tar and create 101 * parallel tests for cpio and newc formats. 102 */ 103 failure("d0/l1 is too short and should not get restored"); 104 assertFileNotExists("target/l1"); 105 failure("d0/d1/l2 is a hardlink to file whose name was too short"); 106 assertFileNotExists("target/l2"); 107 failure("d0/d1/d2/f1 is a hardlink to file whose name was too short"); 108 assertFileNotExists("target/d2/f1"); 109 } 110