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 * Test Name: stat03 22 * 23 * Test Description: 24 * Verify that, 25 * 1) stat(2) returns -1 and sets errno to EACCES if search permission is 26 * denied on a component of the path prefix. 27 * 2) stat(2) returns -1 and sets errno to ENOENT if the specified file 28 * does not exists or empty string. 29 * 3) stat(2) returns -1 and sets errno to EFAULT if pathname points 30 * outside user's accessible address space. 31 * 4) stat(2) returns -1 and sets errno to ENAMETOOLONG if the pathname 32 * component is too long. 33 * 5) stat(2) returns -1 and sets errno to ENOTDIR if the directory 34 * component in pathname is not a directory. 35 * 36 * Expected Result: 37 * stat() should fail with return value -1 and set expected errno. 38 * 39 * Algorithm: 40 * Setup: 41 * Setup signal handling. 42 * Create temporary directory. 43 * Pause for SIGUSR1 if option specified. 44 * 45 * Test: 46 * Loop if the proper options are given. 47 * Execute system call 48 * Check return code, if system call failed (return=-1) 49 * if errno set == expected errno 50 * Issue sys call fails with expected return value and errno. 51 * Otherwise, 52 * Issue sys call fails with unexpected errno. 53 * Otherwise, 54 * Issue sys call returns unexpected value. 55 * 56 * Cleanup: 57 * Print errno log and/or timing stats if options given 58 * Delete the temporary directory(s)/file(s) created. 59 * 60 * Usage: <for command-line> 61 * stat03 [-c n] [-e] [-i n] [-I x] [-p x] [-t] 62 * where, -c n : Run n copies concurrently. 63 * -e : Turn on errno logging. 64 * -i n : Execute test n times. 65 * -I x : Execute test for x seconds. 66 * -P x : Pause for x seconds between iterations. 67 * -t : Turn on syscall timing. 68 * 69 * History 70 * 07/2001 John George 71 * -Ported 72 * 73 * Restrictions: 74 * 75 */ 76 77 #include <stdio.h> 78 #include <stdlib.h> 79 #include <unistd.h> 80 #include <fcntl.h> 81 #include <errno.h> 82 #include <string.h> 83 #include <signal.h> 84 #include <sys/types.h> 85 #include <sys/stat.h> 86 #include <sys/mman.h> 87 #include <pwd.h> 88 89 #include "test.h" 90 #include "safe_macros.h" 91 92 #define MODE_RWX S_IRWXU | S_IRWXG | S_IRWXO 93 #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH 94 #define DIR_TEMP "testdir_1" 95 #define TEST_FILE1 "testdir_1/tfile_1" 96 #define TEST_FILE2 "t_file/tfile_2" 97 98 int no_setup(); 99 int setup1(); /* setup function to test chmod for EACCES */ 100 int setup2(); /* setup function to test chmod for ENOTDIR */ 101 int longpath_setup(); /* setup function to test chmod for ENAMETOOLONG */ 102 char nobody_uid[] = "nobody"; 103 struct passwd *ltpuser; 104 105 char Longpathname[PATH_MAX + 2]; 106 107 struct test_case_t { /* test case struct. to hold ref. test cond's */ 108 char *pathname; 109 char *desc; 110 int exp_errno; 111 int (*setupfunc) (); 112 } Test_cases[] = { 113 {TEST_FILE1, "No Search permissions to process", EACCES, setup1}, { 114 NULL, "Invalid address", EFAULT, no_setup}, { 115 Longpathname, "Pathname too long", ENAMETOOLONG, longpath_setup}, { 116 "", "Pathname is empty", ENOENT, no_setup}, { 117 TEST_FILE2, "Path contains regular file", ENOTDIR, setup2}, { 118 NULL, NULL, 0, no_setup} 119 }; 120 121 char *TCID = "stat03"; 122 int TST_TOTAL = ARRAY_SIZE(Test_cases); 123 124 void setup(); /* Main setup function for the tests */ 125 void cleanup(); /* cleanup function for the test */ 126 127 int main(int ac, char **av) 128 { 129 struct stat stat_buf; /* stat structure buffer */ 130 int lc; 131 char *file_name; /* ptr. for file name whose mode is modified */ 132 char *test_desc; /* test specific error message */ 133 int ind; /* counter to test different test conditions */ 134 135 tst_parse_opts(ac, av, NULL, NULL); 136 137 /* 138 * Invoke setup function to call individual test setup functions 139 * to simulate test conditions. 140 */ 141 setup(); 142 143 for (lc = 0; TEST_LOOPING(lc); lc++) { 144 145 tst_count = 0; 146 147 for (ind = 0; Test_cases[ind].desc != NULL; ind++) { 148 file_name = Test_cases[ind].pathname; 149 test_desc = Test_cases[ind].desc; 150 151 /* 152 * Call stat(2) to test different test conditions. 153 * verify that it fails with -1 return value and 154 * sets appropriate errno. 155 */ 156 TEST(stat(file_name, &stat_buf)); 157 158 /* Check return code from stat(2) */ 159 if (TEST_RETURN == -1) { 160 if (TEST_ERRNO == Test_cases[ind].exp_errno) { 161 tst_resm(TPASS, 162 "stat() fails, %s, errno:%d", 163 test_desc, TEST_ERRNO); 164 } else { 165 tst_resm(TFAIL, 166 "stat() fails, %s, errno:%d, expected errno:%d", 167 test_desc, TEST_ERRNO, 168 Test_cases[ind].exp_errno); 169 } 170 } else { 171 tst_resm(TFAIL, 172 "stat(2) returned %ld, expected -1, errno:%d", 173 TEST_RETURN, 174 Test_cases[ind].exp_errno); 175 } 176 } 177 tst_count++; /* incr TEST_LOOP counter */ 178 } 179 180 /* 181 * Invoke cleanup() to delete the test directory/file(s) created 182 * in the setup(). 183 */ 184 cleanup(); 185 tst_exit(); 186 187 } 188 189 /* 190 * void 191 * setup(void) - performs all ONE TIME setup for this test. 192 * Exit the test program on receipt of unexpected signals. 193 * Create a temporary directory and change directory to it. 194 * Invoke individual test setup functions according to the order 195 * set in struct. definition. 196 */ 197 void setup(void) 198 { 199 int ind; 200 201 tst_require_root(); 202 203 /* Capture unexpected signals */ 204 tst_sig(FORK, DEF_HANDLER, cleanup); 205 206 /* Switch to nobody user for correct error code collection */ 207 ltpuser = getpwnam(nobody_uid); 208 if (setuid(ltpuser->pw_uid) == -1) { 209 tst_resm(TINFO, "setuid failed to " 210 "to set the effective uid to %d", ltpuser->pw_uid); 211 perror("setuid"); 212 } 213 214 /* Pause if that option was specified 215 * TEST_PAUSE contains the code to fork the test with the -i option. 216 * You want to make sure you do this before you create your temporary 217 * directory. 218 */ 219 TEST_PAUSE; 220 221 /* Make a temp dir and cd to it */ 222 tst_tmpdir(); 223 224 /* call individual setup functions */ 225 for (ind = 0; Test_cases[ind].desc != NULL; ind++) { 226 if (!Test_cases[ind].pathname) 227 Test_cases[ind].pathname = tst_get_bad_addr(cleanup); 228 Test_cases[ind].setupfunc(); 229 } 230 } 231 232 /* 233 * int 234 * no_setup() - Some test conditions for stat(2) do not any setup. 235 * Hence, this function just returns 0. 236 * This function simply returns 0. 237 */ 238 int no_setup(void) 239 { 240 return 0; 241 } 242 243 /* 244 * int 245 * setup1() - setup function for a test condition for which stat(2) 246 * returns -1 and sets errno to EACCES. 247 * Create a test directory under temporary directory and create a test file 248 * under this directory with mode "0666" permissions. 249 * Modify the mode permissions on test directory such that process will not 250 * have search permissions on test directory. 251 * 252 * The function returns 0. 253 */ 254 int setup1(void) 255 { 256 int fd; /* file handle for testfile */ 257 258 /* Creat a test directory */ 259 SAFE_MKDIR(cleanup, DIR_TEMP, MODE_RWX); 260 261 /* Creat a test file under above test directory */ 262 if ((fd = open(TEST_FILE1, O_RDWR | O_CREAT, 0666)) == -1) { 263 tst_brkm(TBROK, cleanup, 264 "open(%s, O_RDWR|O_CREAT, 0666) failed, errno=%d : %s", 265 TEST_FILE1, errno, strerror(errno)); 266 } 267 /* Close the test file */ 268 SAFE_CLOSE(cleanup, fd); 269 270 /* Modify mode permissions on test directory */ 271 SAFE_CHMOD(cleanup, DIR_TEMP, FILE_MODE); 272 return 0; 273 } 274 275 /* 276 * int 277 * setup2() - setup function for a test condition for which stat(2) 278 * returns -1 and sets errno to ENOTDIR. 279 * 280 * Create a test file under temporary directory so that test tries to 281 * change mode of a testfile "tfile_2" under "t_file" which happens to be 282 * another regular file. 283 */ 284 int setup2(void) 285 { 286 int fd; /* File handle for test file */ 287 288 /* Creat a test file under temporary directory */ 289 if ((fd = open("t_file", O_RDWR | O_CREAT, MODE_RWX)) == -1) { 290 tst_brkm(TBROK, cleanup, 291 "open(2) on t_file failed, errno=%d : %s", 292 errno, strerror(errno)); 293 } 294 /* Close the test file created above */ 295 SAFE_CLOSE(cleanup, fd); 296 return 0; 297 } 298 299 /* 300 * int 301 * longpath_setup() - setup to create a node with a name length exceeding 302 * the MAX. length of PATH_MAX. 303 * This function retruns 0. 304 */ 305 int longpath_setup(void) 306 { 307 int ind; /* counter variable */ 308 309 for (ind = 0; ind <= (PATH_MAX + 1); ind++) { 310 Longpathname[ind] = 'a'; 311 } 312 return 0; 313 } 314 315 /* 316 * void 317 * cleanup() - Performs all ONE TIME cleanup for this test at 318 * completion or premature exit. 319 * Print test timing stats and errno log if test executed with options. 320 * Remove temporary directory and sub-directories/files under it 321 * created during setup(). 322 * Exit the test program with normal exit code. 323 */ 324 void cleanup(void) 325 { 326 327 /* Restore mode permissions on test directory created in setup2() */ 328 if (chmod(DIR_TEMP, MODE_RWX) < 0) { 329 tst_brkm(TFAIL, NULL, "chmod(2) of %s failed", DIR_TEMP); 330 } 331 332 tst_rmdir(); 333 } 334
