plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame^] | 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | |
| 20 | /* |
| 21 | * Test Name : readlink03 |
| 22 | * |
| 23 | * Test Description : |
| 24 | * Verify that, |
| 25 | * 1) readlink(2) returns -1 and sets errno to EACCES if search/write |
| 26 | * permission is denied in the directory where the symbolic link |
| 27 | * resides. |
| 28 | * 2) readlink(2) returns -1 and sets errno to EINVAL if the buffer size |
| 29 | * is not positive. |
| 30 | * 3) readlink(2) returns -1 and sets errno to EINVAL if the specified |
| 31 | * file is not a symbolic link file. |
| 32 | * 4) readlink(2) returns -1 and sets errno to ENAMETOOLONG if the |
| 33 | * pathname component of symbolic link is too long (ie, > PATH_MAX). |
| 34 | * 5) readlink(2) returns -1 and sets errno to ENOENT if the component of |
| 35 | * symbolic link points to an empty string. |
| 36 | * |
| 37 | * Expected Result: |
| 38 | * readlink() should fail with return value -1 and set expected errno. |
| 39 | * |
| 40 | * Algorithm: |
| 41 | * Setup: |
| 42 | * Setup signal handling. |
| 43 | * Create temporary directory. |
| 44 | * Pause for SIGUSR1 if option specified. |
| 45 | * |
| 46 | * Test: |
| 47 | * Loop if the proper options are given. |
| 48 | * Execute system call |
| 49 | * Check return code, if system call failed (return=-1) |
| 50 | * if errno set == expected errno |
| 51 | * Issue sys call fails with expected return value and errno. |
| 52 | * Otherwise, |
| 53 | * Issue sys call fails with unexpected errno. |
| 54 | * Otherwise, |
| 55 | * Issue sys call returns unexpected value. |
| 56 | * |
| 57 | * Cleanup: |
| 58 | * Print errno log and/or timing stats if options given |
| 59 | * Delete the temporary directory(s)/file(s) created. |
| 60 | * |
| 61 | * Usage: <for command-line> |
| 62 | * readlink03 [-c n] [-e] [-i n] [-I x] [-P x] [-t] |
| 63 | * where, -c n : Run n copies concurrently. |
| 64 | * -e : Turn on errno logging. |
| 65 | * -i n : Execute test n times. |
| 66 | * -I x : Execute test for x seconds. |
| 67 | * -P x : Pause for x seconds between iterations. |
| 68 | * -t : Turn on syscall timing. |
| 69 | * |
| 70 | * HISTORY |
| 71 | * 07/2001 Ported by Wayne Boyer |
| 72 | * |
| 73 | * RESTRICTIONS: |
| 74 | * This test should be executed by 'non-super-user' only. |
| 75 | */ |
| 76 | |
| 77 | #include <stdio.h> |
| 78 | #include <sys/types.h> |
| 79 | #include <sys/fcntl.h> |
| 80 | #include <errno.h> |
| 81 | #include <string.h> |
| 82 | #include <signal.h> |
| 83 | #include <sys/stat.h> |
| 84 | |
| 85 | #include "test.h" |
| 86 | #include "usctest.h" |
| 87 | |
| 88 | #define MODE_RWX S_IRWXU | S_IRWXG | S_IRWXO |
| 89 | #define FILE_MODE S_IRUSR | S_IRGRP | S_IROTH |
| 90 | #define DIR_TEMP "testdir_1" |
| 91 | #define TESTFILE "testfile" |
| 92 | #define TEST_FILE1 "testdir_1/tfile_1" |
| 93 | #define SYM_FILE1 "testdir_1/sfile_1" |
| 94 | #define TEST_FILE2 "tfile_2" |
| 95 | #define SYM_FILE2 "sfile_2" |
| 96 | #define MAX_SIZE 256 |
| 97 | |
| 98 | char *TCID="readlink03"; /* Test program identifier. */ |
| 99 | int TST_TOTAL=5; /* Total number of test cases. */ |
| 100 | extern int Tst_count; /* Test Case counter for tst_* routines */ |
| 101 | int exp_enos[]={EACCES, EINVAL, ENAMETOOLONG, ENOENT, 0}; |
| 102 | |
| 103 | int no_setup(); |
| 104 | int setup1(); /* setup function to test symlink for EACCES */ |
| 105 | int setup2(); /* setup function to test symlink for EEXIST */ |
| 106 | int lpath_setup(); /* setup function to test chmod for ENAMETOOLONG */ |
| 107 | |
| 108 | char Longpathname[PATH_MAX+2]; |
| 109 | |
| 110 | struct test_case_t { /* test case struct. to hold ref. test cond's*/ |
| 111 | char *link; |
| 112 | char *desc; |
| 113 | int exp_errno; |
| 114 | size_t buf_siz; |
| 115 | int (*setupfunc)(); |
| 116 | } Test_cases[] = { |
| 117 | { SYM_FILE1, "No Search permissions to process", EACCES, 1, setup1 }, |
| 118 | { SYM_FILE2, "Buffer size is not positive", EINVAL, -1, setup2 }, |
| 119 | { TEST_FILE2, "File is not symbolic link", EINVAL, 1, no_setup }, |
| 120 | { Longpathname, "Symlink path too long", ENAMETOOLONG, 1, lpath_setup }, |
| 121 | { "", "Symlink Pathname is empty", ENOENT, 1, no_setup }, |
| 122 | { NULL, NULL, 0, 0, no_setup } |
| 123 | }; |
| 124 | |
| 125 | extern void setup(); /* Setup function for the test */ |
| 126 | extern void cleanup(); /* Cleanup function for the test */ |
| 127 | |
| 128 | int |
| 129 | main(int ac, char **av) |
| 130 | { |
| 131 | char buffer[MAX_SIZE]; /* temporary buffer to hold symlink contents*/ |
| 132 | int lc; /* loop counter */ |
| 133 | char *msg; /* message returned from parse_opts */ |
| 134 | char *sym_file; /* symbolic link file name */ |
| 135 | char *test_desc; /* test specific error message */ |
| 136 | int i; /* counter to test different test conditions */ |
| 137 | size_t buf_size; /* size of buffer for readlink */ |
| 138 | |
| 139 | /* Parse standard options given to run the test. */ |
| 140 | msg = parse_opts(ac, av, (option_t *)NULL, NULL); |
| 141 | if (msg != (char *)NULL) { |
| 142 | tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg); |
| 143 | } |
| 144 | |
| 145 | /* |
| 146 | * Invoke setup function to call individual test setup functions |
| 147 | * to simulate test conditions. |
| 148 | */ |
| 149 | setup(); |
| 150 | |
| 151 | /* set the expected errnos... */ |
| 152 | TEST_EXP_ENOS(exp_enos); |
| 153 | |
| 154 | /* Check looping state if -i option given */ |
| 155 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
| 156 | /* Reset Tst_count in case we are looping. */ |
| 157 | Tst_count=0; |
| 158 | |
| 159 | for (i = 0; Test_cases[i].desc != NULL; i++) { |
| 160 | sym_file = Test_cases[i].link; |
| 161 | test_desc = Test_cases[i].desc; |
| 162 | buf_size = Test_cases[i].buf_siz; |
| 163 | |
| 164 | if (buf_size == 1) { |
| 165 | buf_size = sizeof(buffer); |
| 166 | } |
| 167 | |
| 168 | /* |
| 169 | * Call readlink(2) to test different test conditions. |
| 170 | * verify that it fails with -1 return value and sets |
| 171 | * appropriate errno. |
| 172 | */ |
| 173 | TEST(readlink(sym_file, buffer, buf_size)); |
| 174 | |
| 175 | /* Check return code of readlink(2) */ |
| 176 | if (TEST_RETURN != -1) { |
| 177 | tst_resm(TFAIL, "readlink() returned %d, " |
| 178 | "expected -1, errno:%d", TEST_RETURN, |
| 179 | Test_cases[i].exp_errno); |
| 180 | continue; |
| 181 | } |
| 182 | |
| 183 | TEST_ERROR_LOG(TEST_ERRNO); |
| 184 | |
| 185 | if (TEST_ERRNO == Test_cases[i].exp_errno) { |
| 186 | tst_resm(TPASS, "readlink(), %s, returned " |
| 187 | "errno %d", test_desc, TEST_ERRNO); |
| 188 | tst_resm(TPASS, "readlink(), %s, returned " |
| 189 | "errno %d", test_desc, TEST_ERRNO); |
| 190 | } else { |
| 191 | tst_resm(TFAIL, "readlink() failed, %s, " |
| 192 | "errno=%d, expected errno=%d", |
| 193 | test_desc, TEST_ERRNO, |
| 194 | Test_cases[i].exp_errno); |
| 195 | } |
| 196 | } /* End of TEST CASE LOOPING. */ |
| 197 | } /* End for TEST_LOOPING */ |
| 198 | /* Call cleanup() to undo setup done for the test. */ |
| 199 | cleanup(); |
| 200 | |
| 201 | /*NOTREACHED*/ |
| 202 | } /* End main */ |
| 203 | |
| 204 | /* |
| 205 | * setup() - performs all ONE TIME setup for this test. |
| 206 | * |
| 207 | * Create a temporary directory and change directory to it. |
| 208 | * Call test specific setup functions. |
| 209 | */ |
| 210 | void |
| 211 | setup() |
| 212 | { |
| 213 | int i; |
| 214 | |
| 215 | /* make sure test is not being run as root */ |
| 216 | if (0 == geteuid()) { |
| 217 | tst_brkm(TBROK, tst_exit, "Must not run test as root"); |
| 218 | } |
| 219 | |
| 220 | /* capture signals */ |
| 221 | tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| 222 | |
| 223 | /* Pause if that option was specified */ |
| 224 | TEST_PAUSE; |
| 225 | |
| 226 | /* make a temp directory and cd to it */ |
| 227 | tst_tmpdir(); |
| 228 | |
| 229 | /* call individual setup functions */ |
| 230 | for (i = 0; Test_cases[i].desc != NULL; i++) { |
| 231 | Test_cases[i].setupfunc(); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | /* |
| 236 | * no_setup() - Some test conditions for readlink(2) do not any setup. |
| 237 | */ |
| 238 | int |
| 239 | no_setup() |
| 240 | { |
| 241 | return 0; |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * setup1() - setup function for a test condition for which readlink(2) |
| 246 | * returns -1 and sets errno to EACCES. |
| 247 | * |
| 248 | * Create a test directory under temporary directory and create a test file |
| 249 | * under this directory with mode "0666" permissions. |
| 250 | * Create a symlink of testfile under test directory. |
| 251 | * Modify the mode permissions on test directory such that process will not |
| 252 | * have search permissions on test directory. |
| 253 | */ |
| 254 | int |
| 255 | setup1() |
| 256 | { |
| 257 | int fd; /* file handle for testfile */ |
| 258 | |
| 259 | if (mkdir(DIR_TEMP, MODE_RWX) < 0) { |
| 260 | tst_brkm(TBROK, cleanup, "mkdir(2) of %s failed", DIR_TEMP); |
| 261 | } |
| 262 | |
| 263 | if ((fd = open(TEST_FILE1, O_RDWR|O_CREAT, 0666)) == -1) { |
| 264 | tst_brkm(TBROK, cleanup, |
| 265 | "open(%s, O_RDWR|O_CREAT, 0666) failed, errno=%d : %s", |
| 266 | TEST_FILE1, errno, strerror(errno)); |
| 267 | } |
| 268 | if (close(fd) == -1) { |
| 269 | tst_brkm(TBROK, cleanup, "close(%s) failed, errno=%d : %s", |
| 270 | TEST_FILE1, errno, strerror(errno)); |
| 271 | } |
| 272 | |
| 273 | /* Creat a symbolic link of testfile under test directory */ |
| 274 | if (symlink(TEST_FILE1, SYM_FILE1) < 0) { |
| 275 | tst_brkm(TBROK, cleanup, "symlink of %s failed", TEST_FILE1); |
| 276 | } |
| 277 | |
| 278 | /* Modify mode permissions on test directory */ |
| 279 | if (chmod(DIR_TEMP, FILE_MODE) < 0) { |
| 280 | tst_brkm(TBROK, cleanup, "chmod(2) of %s failed", DIR_TEMP); |
| 281 | } |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * setup2() - setup function for a test condition for which readlink(2) |
| 287 | * returns -1 and sets errno to EINVAL. |
| 288 | * |
| 289 | * Create a testfile under temporary directory and create a symlink |
| 290 | * file of it. |
| 291 | */ |
| 292 | int |
| 293 | setup2() |
| 294 | { |
| 295 | int fd; /* file handle for testfile */ |
| 296 | |
| 297 | /* Creat a testfile and close it */ |
| 298 | if ((fd = open(TEST_FILE2, O_RDWR|O_CREAT, 0666)) == -1) { |
| 299 | tst_brkm(TBROK, cleanup, |
| 300 | "open(%s, O_RDWR|O_CREAT, 0666) failed, errno=%d : %s", |
| 301 | TEST_FILE2, errno, strerror(errno)); |
| 302 | } |
| 303 | if (close(fd) == -1) { |
| 304 | tst_brkm(TBROK, cleanup, "close(%s) failed, errno=%d : %s", |
| 305 | TEST_FILE2, errno, strerror(errno)); |
| 306 | } |
| 307 | |
| 308 | /* Creat a symlink of testfile created above */ |
| 309 | if (symlink(TEST_FILE2, SYM_FILE2) < 0) { |
| 310 | tst_brkm(TBROK, cleanup, "symlink() failed to create %s in " |
| 311 | "setup2, error=%d", SYM_FILE2, errno); |
| 312 | } |
| 313 | return 0; |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * lpath_setup() - setup to create a node with a name length exceeding |
| 318 | * the MAX. length of PATH_MAX. |
| 319 | */ |
| 320 | int |
| 321 | lpath_setup() |
| 322 | { |
| 323 | int i; /* counter variable */ |
| 324 | |
| 325 | for (i = 0; i <= (PATH_MAX + 1); i++) { |
| 326 | Longpathname[i] = 'a'; |
| 327 | } |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * cleanup() - performs all ONE TIME cleanup for this test at |
| 333 | * completion or premature exit. |
| 334 | * |
| 335 | * Restore the mode permissions on test directory. |
| 336 | * Remove the temporary directory created in the setup. |
| 337 | */ |
| 338 | void |
| 339 | cleanup() |
| 340 | { |
| 341 | /* |
| 342 | * print timing stats if that option was specified. |
| 343 | * print errno log if that option was specified. |
| 344 | */ |
| 345 | TEST_CLEANUP; |
| 346 | |
| 347 | /* Restore mode permissions on test directory created in setup2() */ |
| 348 | if (chmod(DIR_TEMP, MODE_RWX) < 0) { |
| 349 | tst_brkm(TBROK, NULL, "chmod(2) of %s failed", DIR_TEMP); |
| 350 | } |
| 351 | |
| 352 | /* Remove tmp dir and all files in it */ |
| 353 | tst_rmdir(); |
| 354 | |
| 355 | /* exit with return code appropriate for results */ |
| 356 | tst_exit(); |
| 357 | } |