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 char High_address_node[64]; 107 108 struct test_case_t { /* test case struct. to hold ref. test cond's */ 109 char *pathname; 110 char *desc; 111 int exp_errno; 112 int (*setupfunc) (); 113 } Test_cases[] = { 114 { 115 TEST_FILE1, "No Search permissions to process", EACCES, setup1}, 116 #if !defined(UCLINUX) 117 { 118 High_address_node, "Address beyond address space", EFAULT, no_setup}, 119 { 120 (char *)-1, "Negative address", EFAULT, no_setup}, 121 #endif 122 { 123 Longpathname, "Pathname too long", ENAMETOOLONG, longpath_setup}, { 124 "", "Pathname is empty", ENOENT, no_setup}, { 125 TEST_FILE2, "Path contains regular file", ENOTDIR, setup2}, { 126 NULL, NULL, 0, no_setup} 127 }; 128 129 char *TCID = "stat03"; 130 int TST_TOTAL = ARRAY_SIZE(Test_cases); 131 132 char *bad_addr = 0; 133 134 void setup(); /* Main setup function for the tests */ 135 void cleanup(); /* cleanup function for the test */ 136 137 int main(int ac, char **av) 138 { 139 struct stat stat_buf; /* stat structure buffer */ 140 int lc; 141 char *file_name; /* ptr. for file name whose mode is modified */ 142 char *test_desc; /* test specific error message */ 143 int ind; /* counter to test different test conditions */ 144 145 tst_parse_opts(ac, av, NULL, NULL); 146 147 /* 148 * Invoke setup function to call individual test setup functions 149 * to simulate test conditions. 150 */ 151 setup(); 152 153 for (lc = 0; TEST_LOOPING(lc); lc++) { 154 155 tst_count = 0; 156 157 for (ind = 0; Test_cases[ind].desc != NULL; ind++) { 158 file_name = Test_cases[ind].pathname; 159 test_desc = Test_cases[ind].desc; 160 161 #if !defined(UCLINUX) 162 if (file_name == High_address_node) { 163 file_name = (char *)get_high_address(); 164 } 165 #endif 166 167 /* 168 * Call stat(2) to test different test conditions. 169 * verify that it fails with -1 return value and 170 * sets appropriate errno. 171 */ 172 TEST(stat(file_name, &stat_buf)); 173 174 /* Check return code from stat(2) */ 175 if (TEST_RETURN == -1) { 176 if (TEST_ERRNO == Test_cases[ind].exp_errno) { 177 tst_resm(TPASS, 178 "stat() fails, %s, errno:%d", 179 test_desc, TEST_ERRNO); 180 } else { 181 tst_resm(TFAIL, 182 "stat() fails, %s, errno:%d, expected errno:%d", 183 test_desc, TEST_ERRNO, 184 Test_cases[ind].exp_errno); 185 } 186 } else { 187 tst_resm(TFAIL, 188 "stat(2) returned %ld, expected -1, errno:%d", 189 TEST_RETURN, 190 Test_cases[ind].exp_errno); 191 } 192 } 193 tst_count++; /* incr TEST_LOOP counter */ 194 } 195 196 /* 197 * Invoke cleanup() to delete the test directory/file(s) created 198 * in the setup(). 199 */ 200 cleanup(); 201 tst_exit(); 202 203 } 204 205 /* 206 * void 207 * setup(void) - performs all ONE TIME setup for this test. 208 * Exit the test program on receipt of unexpected signals. 209 * Create a temporary directory and change directory to it. 210 * Invoke individual test setup functions according to the order 211 * set in struct. definition. 212 */ 213 void setup(void) 214 { 215 int ind; 216 217 tst_require_root(); 218 219 /* Capture unexpected signals */ 220 tst_sig(FORK, DEF_HANDLER, cleanup); 221 222 /* Switch to nobody user for correct error code collection */ 223 ltpuser = getpwnam(nobody_uid); 224 if (setuid(ltpuser->pw_uid) == -1) { 225 tst_resm(TINFO, "setuid failed to " 226 "to set the effective uid to %d", ltpuser->pw_uid); 227 perror("setuid"); 228 } 229 230 /* Pause if that option was specified 231 * TEST_PAUSE contains the code to fork the test with the -i option. 232 * You want to make sure you do this before you create your temporary 233 * directory. 234 */ 235 TEST_PAUSE; 236 237 /* Make a temp dir and cd to it */ 238 tst_tmpdir(); 239 240 #if !defined(UCLINUX) 241 bad_addr = mmap(0, 1, PROT_NONE, 242 MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0); 243 if (bad_addr == MAP_FAILED) { 244 tst_brkm(TBROK, cleanup, "mmap failed"); 245 } 246 Test_cases[2].pathname = bad_addr; 247 #endif 248 249 /* call individual setup functions */ 250 for (ind = 0; Test_cases[ind].desc != NULL; ind++) { 251 Test_cases[ind].setupfunc(); 252 } 253 } 254 255 /* 256 * int 257 * no_setup() - Some test conditions for stat(2) do not any setup. 258 * Hence, this function just returns 0. 259 * This function simply returns 0. 260 */ 261 int no_setup(void) 262 { 263 return 0; 264 } 265 266 /* 267 * int 268 * setup1() - setup function for a test condition for which stat(2) 269 * returns -1 and sets errno to EACCES. 270 * Create a test directory under temporary directory and create a test file 271 * under this directory with mode "0666" permissions. 272 * Modify the mode permissions on test directory such that process will not 273 * have search permissions on test directory. 274 * 275 * The function returns 0. 276 */ 277 int setup1(void) 278 { 279 int fd; /* file handle for testfile */ 280 281 /* Creat a test directory */ 282 SAFE_MKDIR(cleanup, DIR_TEMP, MODE_RWX); 283 284 /* Creat a test file under above test directory */ 285 if ((fd = open(TEST_FILE1, O_RDWR | O_CREAT, 0666)) == -1) { 286 tst_brkm(TBROK, cleanup, 287 "open(%s, O_RDWR|O_CREAT, 0666) failed, errno=%d : %s", 288 TEST_FILE1, errno, strerror(errno)); 289 } 290 /* Close the test file */ 291 SAFE_CLOSE(cleanup, fd); 292 293 /* Modify mode permissions on test directory */ 294 SAFE_CHMOD(cleanup, DIR_TEMP, FILE_MODE); 295 return 0; 296 } 297 298 /* 299 * int 300 * setup2() - setup function for a test condition for which stat(2) 301 * returns -1 and sets errno to ENOTDIR. 302 * 303 * Create a test file under temporary directory so that test tries to 304 * change mode of a testfile "tfile_2" under "t_file" which happens to be 305 * another regular file. 306 */ 307 int setup2(void) 308 { 309 int fd; /* File handle for test file */ 310 311 /* Creat a test file under temporary directory */ 312 if ((fd = open("t_file", O_RDWR | O_CREAT, MODE_RWX)) == -1) { 313 tst_brkm(TBROK, cleanup, 314 "open(2) on t_file failed, errno=%d : %s", 315 errno, strerror(errno)); 316 } 317 /* Close the test file created above */ 318 SAFE_CLOSE(cleanup, fd); 319 return 0; 320 } 321 322 /* 323 * int 324 * longpath_setup() - setup to create a node with a name length exceeding 325 * the MAX. length of PATH_MAX. 326 * This function retruns 0. 327 */ 328 int longpath_setup(void) 329 { 330 int ind; /* counter variable */ 331 332 for (ind = 0; ind <= (PATH_MAX + 1); ind++) { 333 Longpathname[ind] = 'a'; 334 } 335 return 0; 336 } 337 338 /* 339 * void 340 * cleanup() - Performs all ONE TIME cleanup for this test at 341 * completion or premature exit. 342 * Print test timing stats and errno log if test executed with options. 343 * Remove temporary directory and sub-directories/files under it 344 * created during setup(). 345 * Exit the test program with normal exit code. 346 */ 347 void cleanup(void) 348 { 349 350 /* Restore mode permissions on test directory created in setup2() */ 351 if (chmod(DIR_TEMP, MODE_RWX) < 0) { 352 tst_brkm(TFAIL, NULL, "chmod(2) of %s failed", DIR_TEMP); 353 } 354 355 tst_rmdir(); 356 } 357
