1 /* 2 * 3 * Copyright (c) International Business Machines Corp., 2001 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /* 21 * NAME 22 * chdir04.c 23 * 24 * DESCRIPTION 25 * Testcase to test whether chdir(2) sets errno correctly. 26 * 27 * ALGORITHM 28 * 1. Test for ENAMETOOLONG: 29 * Create a bad directory name with length more than 30 * 31 * VFS_MAXNAMELEN (Linux kernel variable), and attempt to 32 * chdir(2) to it. 33 * 34 * 2. Test for ENOENT: 35 * Attempt to chdir(2) on a non-existent directory 36 * 37 * 3. Test for EFAULT: 38 * Pass an address which lies outside the address space of the 39 * process, and expect an EFAULT. 40 * 41 * USAGE: <for command-line> 42 * chdir04 [-c n] [-e] [-i n] [-I x] [-P x] [-t] 43 * where, -c n : Run n copies concurrently. 44 * -e : Turn on errno logging. 45 * -i n : Execute test n times. 46 * -I x : Execute test for x seconds. 47 * -P x : Pause for x seconds between iterations. 48 * -t : Turn on syscall timing. 49 * 50 * HISTORY 51 * 07/2001 Ported by Wayne Boyer 52 * 53 * RESTRICTIONS 54 * NONE 55 */ 56 57 #include <stdio.h> 58 #include <errno.h> 59 #include <sys/stat.h> 60 #include <sys/mman.h> 61 #include "test.h" 62 63 char *TCID = "chdir04"; 64 65 char bad_dir[] = 66 "abcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyz"; 67 68 char noexist_dir[] = "/tmp/noexistdir"; 69 70 struct test_case_t { 71 char *dname; 72 int error; 73 } TC[] = { 74 /* 75 * to test whether chdir() is setting ENAMETOOLONG if the 76 * directory is more than VFS_MAXNAMELEN 77 */ 78 { 79 bad_dir, ENAMETOOLONG}, 80 /* 81 * to test whether chdir() is setting ENOENT if the 82 * directory is not existing. 83 */ 84 { 85 noexist_dir, ENOENT}, 86 #ifndef UCLINUX 87 /* 88 * to test whether chdir() is setting EFAULT if the 89 * directory is an invalid address. 90 */ 91 { 92 (void *)-1, EFAULT} 93 #endif 94 }; 95 96 int TST_TOTAL = ARRAY_SIZE(TC); 97 98 int flag; 99 #define FAILED 1 100 101 void setup(void); 102 void cleanup(void); 103 104 char *bad_addr = 0; 105 106 int main(int ac, char **av) 107 { 108 int lc; 109 int i; 110 111 tst_parse_opts(ac, av, NULL, NULL); 112 113 setup(); 114 115 for (lc = 0; TEST_LOOPING(lc); lc++) { 116 tst_count = 0; 117 118 for (i = 0; i < TST_TOTAL; i++) { 119 120 TEST(chdir(TC[i].dname)); 121 122 if (TEST_RETURN != -1) { 123 tst_resm(TFAIL, "call succeeded unexpectedly"); 124 continue; 125 } 126 127 if (TEST_ERRNO == TC[i].error) 128 tst_resm(TPASS | TTERRNO, "failed as expected"); 129 else { 130 tst_resm(TFAIL | TTERRNO, 131 "didn't fail as expected (expected %d)", 132 TC[i].error); 133 } 134 } 135 } 136 cleanup(); 137 138 tst_exit(); 139 140 } 141 142 void setup(void) 143 { 144 145 tst_sig(NOFORK, DEF_HANDLER, cleanup); 146 147 TEST_PAUSE; 148 149 tst_tmpdir(); 150 151 #ifdef UCLINUX 152 bad_addr = mmap(0, 1, PROT_NONE, 153 MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0); 154 if (bad_addr == MAP_FAILED) 155 tst_brkm(TBROK | TERRNO, cleanup, "mmap() failed"); 156 TC[2].dname = bad_addr; 157 #endif 158 } 159 160 void cleanup(void) 161 { 162 tst_rmdir(); 163 164 } 165