1 /* 2 * Test printpath/umovestr. 3 * 4 * Copyright (c) 2015-2017 Dmitry V. Levin <ldv (at) altlinux.org> 5 * Copyright (c) 2017-2018 The strace developers. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "tests.h" 32 33 #include <limits.h> 34 #include <stdio.h> 35 #include <string.h> 36 #include <unistd.h> 37 38 #include "test_ucopy.h" 39 40 static void 41 test_printpath_at(char *const p, const unsigned int test_max) 42 { 43 /* 44 * / 45 * /. 46 * /.. 47 * /... 48 * /../. 49 * /../.. 50 * /../../ 51 */ 52 53 char *const eop = p + (test_max - 1); 54 *eop = '\0'; 55 unsigned int i; 56 for (i = 1; i < test_max; ++i) { 57 const unsigned int i_1 = i - 1; 58 memmove(eop - i, eop - i_1, i_1); 59 eop[-1] = "/.."[i_1 % 3]; 60 if (chdir(eop - i)) 61 perror_msg_and_fail("chdir"); 62 printf("chdir(\"%s\") = 0\n", eop - i); 63 } 64 } 65 66 static void 67 test_efault(const unsigned int test_max) 68 { 69 char *p = tail_alloc(test_max); 70 const char *const efault = p + test_max; 71 memset(p, '/', test_max); 72 73 for (; p <= efault; ++p) { 74 if (p <= efault - PATH_MAX) 75 continue; 76 printf("chdir(%p) = %s\n", p, sprintrc(chdir(p))); 77 } 78 } 79 80 static void 81 test_enametoolong(void) 82 { 83 char *p = tail_alloc(PATH_MAX); 84 memset(p, '/', PATH_MAX); 85 86 printf("chdir(\"%.*s\"...) = %s\n", 87 PATH_MAX - 1, p, sprintrc(chdir(p))); 88 } 89 90 void 91 test_printpath(const unsigned int test_max) 92 { 93 /* 94 * /../..| 95 * /../.|. 96 * /../|.. 97 * /..|/.. 98 * /.|./.. 99 * /|../.. 100 * |/../.. 101 */ 102 const unsigned int page_size = get_page_size(); 103 char *p = tail_alloc(test_max + page_size); 104 unsigned int i; 105 for (i = 1; i < sizeof(long); ++i) 106 test_printpath_at(p + i, test_max); 107 for (i = 0; i < sizeof(long); ++i) 108 test_printpath_at(p + page_size - i, test_max); 109 test_efault(test_max); 110 test_enametoolong(); 111 } 112
