1 /* 2 * Copyright (c) International Business Machines Corp., 2001 3 * 07/2001 Ported by Wayne Boyer 4 * Copyright (c) 2014 Cyril Hrubis <chrubis (at) suse.cz> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 14 * the GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 /* 22 * Test Name: chmod06 23 * 24 * Test Description: 25 * Verify that, 26 * 1) chmod(2) returns -1 and sets errno to EPERM if the effective user id 27 * of process does not match the owner of the file and the process is 28 * not super user. 29 * 2) chmod(2) returns -1 and sets errno to EACCES if search permission is 30 * denied on a component of the path prefix. 31 * 3) chmod(2) returns -1 and sets errno to EFAULT if pathname points 32 * outside user's accessible address space. 33 * 4) chmod(2) returns -1 and sets errno to ENAMETOOLONG if the pathname 34 * component is too long. 35 * 5) chmod(2) returns -1 and sets errno to ENOTDIR if the directory 36 * component in pathname is not a directory. 37 * 6) chmod(2) returns -1 and sets errno to ENOENT if the specified file 38 * does not exists. 39 */ 40 41 #ifndef _GNU_SOURCE 42 # define _GNU_SOURCE 43 #endif 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <unistd.h> 48 #include <fcntl.h> 49 #include <errno.h> 50 #include <string.h> 51 #include <signal.h> 52 #include <grp.h> 53 #include <pwd.h> 54 #include <sys/types.h> 55 #include <sys/stat.h> 56 #include <sys/mman.h> 57 #include <sys/mount.h> 58 59 #include "test.h" 60 #include "safe_macros.h" 61 62 #define MODE_RWX (S_IRWXU|S_IRWXG|S_IRWXO) 63 #define FILE_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH) 64 #define DIR_TEMP "testdir_1" 65 #define TEST_FILE1 "tfile_1" 66 #define TEST_FILE2 "testdir_1/tfile_2" 67 #define TEST_FILE3 "t_file/tfile_3" 68 #define TEST_FILE4 "test_file4" 69 #define MNT_POINT "mntpoint" 70 71 #define DIR_MODE (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP| \ 72 S_IXGRP|S_IROTH|S_IXOTH) 73 74 static char long_path[PATH_MAX + 2]; 75 76 static const char *device; 77 static int mount_flag; 78 static uid_t nobody_uid; 79 80 static void set_root(void); 81 static void set_nobody(void); 82 83 struct test_case_t { 84 char *pathname; 85 mode_t mode; 86 int exp_errno; 87 void (*setup)(void); 88 void (*cleanup)(void); 89 } tc[] = { 90 {TEST_FILE1, FILE_MODE, EPERM, set_nobody, set_root}, 91 {TEST_FILE2, FILE_MODE, EACCES, set_nobody, set_root}, 92 {(char *)-1, FILE_MODE, EFAULT, NULL, NULL}, 93 {(char *)-2, FILE_MODE, EFAULT, NULL, NULL}, 94 {long_path, FILE_MODE, ENAMETOOLONG, NULL, NULL}, 95 {"", FILE_MODE, ENOENT, NULL, NULL}, 96 {TEST_FILE3, FILE_MODE, ENOTDIR, NULL, NULL}, 97 {MNT_POINT, FILE_MODE, EROFS, NULL, NULL}, 98 {TEST_FILE4, FILE_MODE, ELOOP, NULL, NULL}, 99 }; 100 101 char *TCID = "chmod06"; 102 int TST_TOTAL = ARRAY_SIZE(tc); 103 104 static char *bad_addr = 0; 105 106 static void setup(void); 107 static void cleanup(void); 108 109 int main(int ac, char **av) 110 { 111 int lc; 112 int i; 113 114 tst_parse_opts(ac, av, NULL, NULL); 115 116 setup(); 117 118 for (lc = 0; TEST_LOOPING(lc); lc++) { 119 tst_count = 0; 120 121 for (i = 0; i < TST_TOTAL; i++) { 122 123 if (tc[i].setup) 124 tc[i].setup(); 125 126 TEST(chmod(tc[i].pathname, tc[i].mode)); 127 128 if (tc[i].cleanup) 129 tc[i].cleanup(); 130 131 if (TEST_RETURN != -1) { 132 tst_resm(TFAIL, "chmod succeeded unexpectedly"); 133 continue; 134 } 135 136 if (TEST_ERRNO == tc[i].exp_errno) 137 tst_resm(TPASS | TTERRNO, 138 "chmod failed as expected"); 139 else 140 tst_resm(TFAIL | TTERRNO, 141 "chmod failed unexpectedly; " 142 "expected %d - %s", 143 tc[i].exp_errno, 144 tst_strerrno(tc[i].exp_errno)); 145 } 146 147 } 148 149 cleanup(); 150 tst_exit(); 151 } 152 153 void set_root(void) 154 { 155 SAFE_SETEUID(cleanup, 0); 156 } 157 158 void set_nobody(void) 159 { 160 SAFE_SETEUID(cleanup, nobody_uid); 161 } 162 163 void setup(void) 164 { 165 struct passwd *nobody; 166 const char *fs_type; 167 168 tst_sig(FORK, DEF_HANDLER, cleanup); 169 170 tst_require_root(); 171 172 TEST_PAUSE; 173 174 nobody = SAFE_GETPWNAM(NULL, "nobody"); 175 nobody_uid = nobody->pw_uid; 176 177 bad_addr = SAFE_MMAP(NULL, 0, 1, PROT_NONE, 178 MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0); 179 tc[3].pathname = bad_addr; 180 181 tst_tmpdir(); 182 183 fs_type = tst_dev_fs_type(); 184 device = tst_acquire_device(cleanup); 185 186 if (!device) 187 tst_brkm(TCONF, cleanup, "Failed to obtain block device"); 188 189 SAFE_TOUCH(cleanup, TEST_FILE1, 0666, NULL); 190 SAFE_MKDIR(cleanup, DIR_TEMP, MODE_RWX); 191 SAFE_TOUCH(cleanup, TEST_FILE2, 0666, NULL); 192 SAFE_CHMOD(cleanup, DIR_TEMP, FILE_MODE); 193 SAFE_TOUCH(cleanup, "t_file", MODE_RWX, NULL); 194 195 tst_mkfs(cleanup, device, fs_type, NULL, NULL); 196 197 SAFE_MKDIR(cleanup, MNT_POINT, DIR_MODE); 198 199 /* 200 * mount a read-only file system for test EROFS 201 */ 202 if (mount(device, MNT_POINT, fs_type, MS_RDONLY, NULL) < 0) { 203 tst_brkm(TBROK | TERRNO, cleanup, 204 "mount device:%s failed", device); 205 } 206 mount_flag = 1; 207 208 memset(long_path, 'a', PATH_MAX+1); 209 210 /* 211 * create two symbolic links who point to each other for 212 * test ELOOP. 213 */ 214 SAFE_SYMLINK(cleanup, "test_file4", "test_file5"); 215 SAFE_SYMLINK(cleanup, "test_file5", "test_file4"); 216 } 217 218 static void cleanup(void) 219 { 220 if (chmod(DIR_TEMP, MODE_RWX) == -1) 221 tst_resm(TBROK | TERRNO, "chmod(%s) failed", DIR_TEMP); 222 223 if (mount_flag && tst_umount(MNT_POINT) < 0) { 224 tst_brkm(TBROK | TERRNO, NULL, 225 "umount device:%s failed", device); 226 } 227 228 if (device) 229 tst_release_device(device); 230 231 tst_rmdir(); 232 } 233
