| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2001 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * Test Name : symlink03 |
| * |
| * Test Description : |
| * Verify that, |
| * 1) symlink(2) returns -1 and sets errno to EACCES if search/write |
| * permission is denied in the directory where the symbolic link is |
| * being created. |
| * 2) symlink(2) returns -1 and sets errno to EEXIST if the specified |
| * symbolic link already exists. |
| * 3) symlink(2) returns -1 and sets errno to EFAULT if the specified |
| * file or symbolic link points to invalid address. |
| * 4) symlink(2) returns -1 and sets errno to ENAMETOOLONG if the |
| * pathname component of symbolic link is too long (ie, > PATH_MAX). |
| * 5) symlink(2) returns -1 and sets errno to ENOTDIR if the directory |
| * component in pathname of symbolic link is not a directory. |
| * 6) symlink(2) returns -1 and sets errno to ENOENT if the component of |
| * symbolic link points to an empty string. |
| * |
| * Expected Result: |
| * symlink() should fail with return value -1 and set expected errno. |
| * |
| * Algorithm: |
| * Setup: |
| * Setup signal handling. |
| * Create temporary directory. |
| * Pause for SIGUSR1 if option specified. |
| * |
| * Test: |
| * Loop if the proper options are given. |
| * Execute system call |
| * Check return code, if system call failed (return=-1) |
| * if errno set == expected errno |
| * Issue sys call fails with expected return value and errno. |
| * Otherwise, |
| * Issue sys call fails with unexpected errno. |
| * Otherwise, |
| * Issue sys call returns unexpected value. |
| * |
| * Cleanup: |
| * Print errno log and/or timing stats if options given |
| * Delete the temporary directory(s)/file(s) created. |
| * |
| * Usage: <for command-line> |
| * symlink03 [-c n] [-e] [-i n] [-I x] [-p x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -e : Turn on errno logging. |
| * -i n : Execute test n times. |
| * -I x : Execute test for x seconds. |
| * -P x : Pause for x seconds between iterations. |
| * -t : Turn on syscall timing. |
| * |
| * History |
| * 07/2001 John George |
| * -Ported |
| * |
| * Restrictions: |
| */ |
| |
| #include <stdio.h> |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include <sys/mman.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <sys/stat.h> |
| #include <pwd.h> |
| |
| #include "test.h" |
| #include "safe_macros.h" |
| |
| #define MODE_RWX S_IRWXU | S_IRWXG | S_IRWXO |
| #define FILE_MODE S_IRUSR | S_IRGRP | S_IROTH |
| #define DIR_TEMP "testdir_1" |
| #define TESTFILE "testfile" |
| #define TEST_FILE1 "testdir_1/tfile_1" |
| #define SYM_FILE1 "testdir_1/sfile_1" |
| #define TEST_FILE2 "tfile_2" |
| #define SYM_FILE2 "sfile_2" |
| #define TEST_FILE3 "tfile_3" |
| #define SYM_FILE3 "t_file/sfile_3" |
| |
| char *TCID = "symlink03"; |
| int TST_TOTAL = 1; |
| |
| int no_setup(); |
| int setup1(); /* setup function to test symlink for EACCES */ |
| int setup2(); /* setup function to test symlink for EEXIST */ |
| int setup3(); /* setup function to test symlink for ENOTDIR */ |
| int longpath_setup(); /* setup function to test chmod for ENAMETOOLONG */ |
| |
| char Longpathname[PATH_MAX + 2]; |
| char High_address_node[64]; |
| |
| struct test_case_t { /* test case struct. to hold ref. test cond's */ |
| char *file; |
| char *link; |
| char *desc; |
| int exp_errno; |
| int (*setupfunc) (); |
| } Test_cases[] = { |
| {TEST_FILE1, SYM_FILE1, "No Search permissions to process", |
| EACCES, setup1}, { |
| TEST_FILE2, SYM_FILE2, "Specified symlink already exists", |
| EEXIST, setup2}, { |
| TESTFILE, NULL, "Invalid address", EFAULT, no_setup}, { |
| TESTFILE, Longpathname, "Symlink path too long", ENAMETOOLONG, |
| longpath_setup}, { |
| TESTFILE, "", "Symlink Pathname is empty", ENOENT, no_setup}, { |
| TEST_FILE3, SYM_FILE3, "Symlink Path contains regular file", |
| ENOTDIR, setup3}, { |
| NULL, NULL, NULL, 0, no_setup} |
| }; |
| |
| char nobody_uid[] = "nobody"; |
| struct passwd *ltpuser; |
| |
| void setup(); |
| void cleanup(); |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| char *test_file; /* testfile name */ |
| char *sym_file; /* symbolic link file name */ |
| char *test_desc; /* test specific error message */ |
| int ind; /* counter to test different test conditions */ |
| |
| tst_parse_opts(ac, av, NULL, NULL); |
| |
| /* |
| * Invoke setup function to call individual test setup functions |
| * to simulate test conditions. |
| */ |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| tst_count = 0; |
| |
| for (ind = 0; Test_cases[ind].desc != NULL; ind++) { |
| test_file = Test_cases[ind].file; |
| sym_file = Test_cases[ind].link; |
| test_desc = Test_cases[ind].desc; |
| |
| /* |
| * Call symlink(2) to test different test conditions. |
| * verify that it fails with -1 return value and sets |
| * appropriate errno. |
| */ |
| TEST(symlink(test_file, sym_file)); |
| |
| if (TEST_RETURN == -1) { |
| /* |
| * Perform functional verification if |
| * test executed without (-f) option. |
| */ |
| if (TEST_ERRNO == Test_cases[ind].exp_errno) { |
| tst_resm(TPASS, "symlink() Fails, %s, " |
| "errno=%d", test_desc, |
| TEST_ERRNO); |
| } else { |
| tst_resm(TFAIL, "symlink() Fails, %s, " |
| "errno=%d, expected errno=%d", |
| test_desc, TEST_ERRNO, |
| Test_cases[ind].exp_errno); |
| } |
| } else { |
| tst_resm(TFAIL, "symlink() returned %ld, " |
| "expected -1, errno:%d", TEST_RETURN, |
| Test_cases[ind].exp_errno); |
| } |
| } |
| |
| tst_count++; /* incr. TEST_LOOP counter */ |
| } |
| |
| cleanup(); |
| tst_exit(); |
| |
| } |
| |
| /* |
| * void |
| * setup() - performs all ONE TIME setup for this test. |
| * Create a temporary directory and change directory to it. |
| * Call test specific setup functions. |
| */ |
| void setup(void) |
| { |
| int ind; |
| |
| tst_require_root(); |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| /* Pause if that option was specified |
| * TEST_PAUSE contains the code to fork the test with the -i option. |
| * You want to make sure you do this before you create your temporary |
| * directory. |
| */ |
| TEST_PAUSE; |
| |
| /* Switch to nobody user for correct error code collection */ |
| ltpuser = getpwnam(nobody_uid); |
| if (setuid(ltpuser->pw_uid) == -1) |
| tst_resm(TINFO | TERRNO, "setuid(%d) failed", ltpuser->pw_uid); |
| |
| tst_tmpdir(); |
| |
| /* call individual setup functions */ |
| for (ind = 0; Test_cases[ind].desc != NULL; ind++) { |
| if (!Test_cases[ind].link) |
| Test_cases[ind].link = tst_get_bad_addr(cleanup); |
| Test_cases[ind].setupfunc(); |
| } |
| } |
| |
| /* |
| * int |
| * no_setup() - Some test conditions for mknod(2) do not any setup. |
| * Hence, this function just returns 0. |
| * This function simply returns 0. |
| */ |
| int no_setup(void) |
| { |
| return 0; |
| } |
| |
| /* |
| * int |
| * setup1() - setup function for a test condition for which symlink(2) |
| * returns -1 and sets errno to EACCES. |
| * Create a test directory under temporary directory and create a test file |
| * under this directory with mode "0666" permissions. |
| * Modify the mode permissions on test directory such that process will not |
| * have search permissions on test directory. |
| * |
| * The function returns 0. |
| */ |
| int setup1(void) |
| { |
| int fd; /* file handle for testfile */ |
| |
| SAFE_MKDIR(cleanup, DIR_TEMP, MODE_RWX); |
| |
| if ((fd = open(TEST_FILE1, O_RDWR | O_CREAT, 0666)) == -1) { |
| tst_brkm(TBROK, cleanup, |
| "open(%s, O_RDWR|O_CREAT, 0666) failed, errno=%d : %s", |
| TEST_FILE1, errno, strerror(errno)); |
| } |
| SAFE_CLOSE(cleanup, fd); |
| |
| /* Modify mode permissions on test directory */ |
| SAFE_CHMOD(cleanup, DIR_TEMP, FILE_MODE); |
| return 0; |
| } |
| |
| /* |
| * int |
| * setup2() - EEXIST |
| */ |
| int setup2(void) |
| { |
| int fd; /* file handle for testfile */ |
| |
| if ((fd = open(TEST_FILE2, O_RDWR | O_CREAT, 0666)) == -1) { |
| tst_brkm(TBROK, cleanup, |
| "open(%s, O_RDWR|O_CREAT, 0666) failed, errno=%d : %s", |
| TEST_FILE1, errno, strerror(errno)); |
| } |
| SAFE_CLOSE(cleanup, fd); |
| |
| SAFE_SYMLINK(cleanup, TEST_FILE2, SYM_FILE2); |
| return 0; |
| } |
| |
| /* |
| * int |
| * longpath_setup() - setup to create a node with a name length exceeding |
| * the MAX. length of PATH_MAX. |
| * This function retruns 0. |
| */ |
| int longpath_setup(void) |
| { |
| int ind; /* counter variable */ |
| |
| for (ind = 0; ind <= (PATH_MAX + 1); ind++) { |
| Longpathname[ind] = 'a'; |
| } |
| return 0; |
| } |
| |
| /* |
| * int |
| * setup3() - setup function for a test condition for which symlink(2) |
| * returns -1 and sets errno to ENOTDIR. |
| * |
| * Create a symlink file under temporary directory so that test tries to |
| * create symlink file "tfile_3" under "t_file" which happens to be |
| * another symlink file. |
| */ |
| int setup3(void) |
| { |
| int fd; /* file handle for testfile */ |
| |
| /* Creat/open a testfile and close it */ |
| if ((fd = open("t_file", O_RDWR | O_CREAT, MODE_RWX)) == -1) { |
| tst_brkm(TBROK, cleanup, |
| "open(2) on t_file failed, errno=%d : %s", |
| errno, strerror(errno)); |
| } |
| SAFE_CLOSE(cleanup, fd); |
| return 0; |
| } |
| |
| /* |
| * void |
| * cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| * Restore the mode permissions on test directory. |
| * Remove the temporary directory created in the setup. |
| */ |
| void cleanup(void) |
| { |
| |
| /* Restore mode permissions on test directory created in setup2() */ |
| SAFE_CHMOD(NULL, DIR_TEMP, MODE_RWX); |
| |
| tst_rmdir(); |
| |
| } |