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 91 #define MODE_RWX S_IRWXU | S_IRWXG | S_IRWXO 92 #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH 93 #define DIR_TEMP "testdir_1" 94 #define TEST_FILE1 "testdir_1/tfile_1" 95 #define TEST_FILE2 "t_file/tfile_2" 96 97 int no_setup(); 98 int setup1(); /* setup function to test chmod for EACCES */ 99 int setup2(); /* setup function to test chmod for ENOTDIR */ 100 int longpath_setup(); /* setup function to test chmod for ENAMETOOLONG */ 101 char nobody_uid[] = "nobody"; 102 struct passwd *ltpuser; 103 104 char Longpathname[PATH_MAX + 2]; 105 char High_address_node[64]; 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 { 114 TEST_FILE1, "No Search permissions to process", EACCES, setup1}, 115 #if !defined(UCLINUX) 116 { 117 High_address_node, "Address beyond address space", EFAULT, no_setup}, 118 { 119 (char *)-1, "Negative address", EFAULT, no_setup}, 120 #endif 121 { 122 Longpathname, "Pathname too long", ENAMETOOLONG, longpath_setup}, { 123 "", "Pathname is empty", ENOENT, no_setup}, { 124 TEST_FILE2, "Path contains regular file", ENOTDIR, setup2}, { 125 NULL, NULL, 0, no_setup} 126 }; 127 128 char *TCID = "stat03"; 129 int TST_TOTAL = ARRAY_SIZE(Test_cases); 130 131 char *bad_addr = 0; 132 133 void setup(); /* Main setup function for the tests */ 134 void cleanup(); /* cleanup function for the test */ 135 136 int main(int ac, char **av) 137 { 138 struct stat stat_buf; /* stat structure buffer */ 139 int lc; 140 char *file_name; /* ptr. for file name whose mode is modified */ 141 char *test_desc; /* test specific error message */ 142 int ind; /* counter to test different test conditions */ 143 144 tst_parse_opts(ac, av, NULL, NULL); 145 146 /* 147 * Invoke setup function to call individual test setup functions 148 * to simulate test conditions. 149 */ 150 setup(); 151 152 for (lc = 0; TEST_LOOPING(lc); lc++) { 153 154 tst_count = 0; 155 156 for (ind = 0; Test_cases[ind].desc != NULL; ind++) { 157 file_name = Test_cases[ind].pathname; 158 test_desc = Test_cases[ind].desc; 159 160 #if !defined(UCLINUX) 161 if (file_name == High_address_node) { 162 file_name = (char *)get_high_address(); 163 } 164 #endif 165 166 /* 167 * Call stat(2) to test different test conditions. 168 * verify that it fails with -1 return value and 169 * sets appropriate errno. 170 */ 171 TEST(stat(file_name, &stat_buf)); 172 173 /* Check return code from stat(2) */ 174 if (TEST_RETURN == -1) { 175 if (TEST_ERRNO == Test_cases[ind].exp_errno) { 176 tst_resm(TPASS, 177 "stat() fails, %s, errno:%d", 178 test_desc, TEST_ERRNO); 179 } else { 180 tst_resm(TFAIL, 181 "stat() fails, %s, errno:%d, expected errno:%d", 182 test_desc, TEST_ERRNO, 183 Test_cases[ind].exp_errno); 184 } 185 } else { 186 tst_resm(TFAIL, 187 "stat(2) returned %ld, expected -1, errno:%d", 188 TEST_RETURN, 189 Test_cases[ind].exp_errno); 190 } 191 } 192 tst_count++; /* incr TEST_LOOP counter */ 193 } 194 195 /* 196 * Invoke cleanup() to delete the test directory/file(s) created 197 * in the setup(). 198 */ 199 cleanup(); 200 tst_exit(); 201 202 } 203 204 /* 205 * void 206 * setup(void) - performs all ONE TIME setup for this test. 207 * Exit the test program on receipt of unexpected signals. 208 * Create a temporary directory and change directory to it. 209 * Invoke individual test setup functions according to the order 210 * set in struct. definition. 211 */ 212 void setup(void) 213 { 214 int ind; 215 216 tst_require_root(); 217 218 /* Capture unexpected signals */ 219 tst_sig(FORK, DEF_HANDLER, cleanup); 220 221 /* Switch to nobody user for correct error code collection */ 222 ltpuser = getpwnam(nobody_uid); 223 if (setuid(ltpuser->pw_uid) == -1) { 224 tst_resm(TINFO, "setuid failed to " 225 "to set the effective uid to %d", ltpuser->pw_uid); 226 perror("setuid"); 227 } 228 229 /* Pause if that option was specified 230 * TEST_PAUSE contains the code to fork the test with the -i option. 231 * You want to make sure you do this before you create your temporary 232 * directory. 233 */ 234 TEST_PAUSE; 235 236 /* Make a temp dir and cd to it */ 237 tst_tmpdir(); 238 239 #if !defined(UCLINUX) 240 bad_addr = mmap(0, 1, PROT_NONE, 241 MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0); 242 if (bad_addr == MAP_FAILED) { 243 tst_brkm(TBROK, cleanup, "mmap failed"); 244 } 245 Test_cases[2].pathname = bad_addr; 246 #endif 247 248 /* call individual setup functions */ 249 for (ind = 0; Test_cases[ind].desc != NULL; ind++) { 250 Test_cases[ind].setupfunc(); 251 } 252 } 253 254 /* 255 * int 256 * no_setup() - Some test conditions for stat(2) do not any setup. 257 * Hence, this function just returns 0. 258 * This function simply returns 0. 259 */ 260 int no_setup(void) 261 { 262 return 0; 263 } 264 265 /* 266 * int 267 * setup1() - setup function for a test condition for which stat(2) 268 * returns -1 and sets errno to EACCES. 269 * Create a test directory under temporary directory and create a test file 270 * under this directory with mode "0666" permissions. 271 * Modify the mode permissions on test directory such that process will not 272 * have search permissions on test directory. 273 * 274 * The function returns 0. 275 */ 276 int setup1(void) 277 { 278 int fd; /* file handle for testfile */ 279 280 /* Creat a test directory */ 281 if (mkdir(DIR_TEMP, MODE_RWX) < 0) { 282 tst_brkm(TBROK, cleanup, "mkdir(2) of %s failed", DIR_TEMP); 283 } 284 285 /* Creat a test file under above test directory */ 286 if ((fd = open(TEST_FILE1, O_RDWR | O_CREAT, 0666)) == -1) { 287 tst_brkm(TBROK, cleanup, 288 "open(%s, O_RDWR|O_CREAT, 0666) failed, errno=%d : %s", 289 TEST_FILE1, errno, strerror(errno)); 290 } 291 /* Close the test file */ 292 if (close(fd) == -1) { 293 tst_brkm(TBROK, cleanup, 294 "close(%s) Failed, errno=%d : %s", 295 TEST_FILE1, errno, strerror(errno)); 296 } 297 298 /* Modify mode permissions on test directory */ 299 if (chmod(DIR_TEMP, FILE_MODE) < 0) { 300 tst_brkm(TBROK, cleanup, "chmod(2) of %s failed", DIR_TEMP); 301 } 302 return 0; 303 } 304 305 /* 306 * int 307 * setup2() - setup function for a test condition for which stat(2) 308 * returns -1 and sets errno to ENOTDIR. 309 * 310 * Create a test file under temporary directory so that test tries to 311 * change mode of a testfile "tfile_2" under "t_file" which happens to be 312 * another regular file. 313 */ 314 int setup2(void) 315 { 316 int fd; /* File handle for test file */ 317 318 /* Creat a test file under temporary directory */ 319 if ((fd = open("t_file", O_RDWR | O_CREAT, MODE_RWX)) == -1) { 320 tst_brkm(TBROK, cleanup, 321 "open(2) on t_file failed, errno=%d : %s", 322 errno, strerror(errno)); 323 } 324 /* Close the test file created above */ 325 if (close(fd) == -1) { 326 tst_brkm(TBROK, cleanup, 327 "close(t_file) Failed, errno=%d : %s", 328 errno, strerror(errno)); 329 } 330 return 0; 331 } 332 333 /* 334 * int 335 * longpath_setup() - setup to create a node with a name length exceeding 336 * the MAX. length of PATH_MAX. 337 * This function retruns 0. 338 */ 339 int longpath_setup(void) 340 { 341 int ind; /* counter variable */ 342 343 for (ind = 0; ind <= (PATH_MAX + 1); ind++) { 344 Longpathname[ind] = 'a'; 345 } 346 return 0; 347 } 348 349 /* 350 * void 351 * cleanup() - Performs all ONE TIME cleanup for this test at 352 * completion or premature exit. 353 * Print test timing stats and errno log if test executed with options. 354 * Remove temporary directory and sub-directories/files under it 355 * created during setup(). 356 * Exit the test program with normal exit code. 357 */ 358 void cleanup(void) 359 { 360 361 /* Restore mode permissions on test directory created in setup2() */ 362 if (chmod(DIR_TEMP, MODE_RWX) < 0) { 363 tst_brkm(TFAIL, NULL, "chmod(2) of %s failed", DIR_TEMP); 364 } 365 366 tst_rmdir(); 367 } 368
