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 * NAME 22 * settimeofday02.c 23 * 24 * DESCRIPTION 25 * Testcase to check that settimeofday() sets errnos correctly. 26 * 27 * ALGORITHM 28 * Setup: 29 * Setup signal handling. 30 * Check that we are not root. 31 * Setup expected errnos. 32 * Pause for SIGUSER1 if option specified. 33 * Save the current time values. 34 * Loop if the proper options are given. 35 * Call settimeofday with an invalid "buf" address and verify that 36 * errno is set to EFAULT. 37 * Call settimeofday as a non-root user. Verify that the call fails 38 * and errno is set to EPERM. 39 * Cleanup: 40 * Print errno log and/or timing stats if options given. 41 * 42 * USAGE: <for command-line> 43 * settimeofday02 [-c n] [-e] [-i n] [-I x] [-P x] [-t] 44 * where, -c n : Run n copies concurrently. 45 * -e : Turn on errno logging. 46 * -i n : Execute test n times. 47 * -I x : Execute test for x seconds. 48 * -P x : Pause for x seconds between iterations. 49 * -t : Turn on syscall timing. 50 * 51 * History 52 * 07/2001 John George 53 * -Ported 54 * 55 * Restrictions 56 * Must not be run as root 57 */ 58 59 #include <stdio.h> 60 #include <sys/time.h> 61 #include <errno.h> 62 #include "test.h" 63 #include <pwd.h> 64 65 #define VAL_SEC 100 66 #define VAL_MSEC 100 67 68 char *TCID = "settimeofday02"; 69 int TST_TOTAL = 1; 70 71 struct timeval tp; 72 time_t save_tv_sec, save_tv_usec; 73 74 char nobody_uid[] = "nobody"; 75 struct passwd *ltpuser; 76 77 void setup(void); 78 void cleanup(void); 79 void restore_time(void); 80 81 #if !defined(UCLINUX) 82 83 int main(int argc, char **argv) 84 { 85 int lc; 86 87 tst_parse_opts(argc, argv, NULL, NULL); 88 89 setup(); 90 91 for (lc = 0; TEST_LOOPING(lc); lc++) { 92 /* reset tst_count in case we are looping */ 93 tst_count = 0; 94 95 TEST(settimeofday((void *)-1, NULL)); 96 if (TEST_RETURN != -1) { 97 tst_resm(TFAIL, "settimeofday(2) failed to FAIL"); 98 restore_time(); 99 } else { 100 if (TEST_ERRNO != EFAULT) { 101 tst_resm(TFAIL, "Expected EFAULT got %d", 102 TEST_ERRNO); 103 } else { 104 tst_resm(TPASS, "Received expected errno"); 105 } 106 } 107 108 tp.tv_sec = VAL_SEC; 109 tp.tv_usec = VAL_MSEC; 110 TEST(settimeofday(&tp, NULL)); 111 if (TEST_RETURN != -1) { 112 tst_resm(TFAIL, "settimeofday(2) failed to FAIL"); 113 restore_time(); 114 } else { 115 if (TEST_ERRNO != EPERM) { 116 tst_resm(TFAIL, "Expected EPERM got %d", 117 TEST_ERRNO); 118 } else { 119 tst_resm(TPASS, "Received expected errno"); 120 } 121 } 122 } 123 cleanup(); 124 tst_exit(); 125 126 } 127 128 #else 129 130 int main(void) 131 { 132 tst_resm(TINFO, "test is not available on uClinux"); 133 tst_exit(); 134 } 135 136 #endif /* if !defined(UCLINUX) */ 137 138 /* 139 * setup() 140 * performs all ONE TIME setup for this test 141 */ 142 void setup(void) 143 { 144 tst_require_root(); 145 146 tst_sig(FORK, DEF_HANDLER, cleanup); 147 148 /* Switch to nobody user for correct error code collection */ 149 ltpuser = getpwnam(nobody_uid); 150 if (setuid(ltpuser->pw_uid) == -1) { 151 tst_resm(TINFO, "setuid failed to " 152 "to set the effective uid to %d", ltpuser->pw_uid); 153 perror("setuid"); 154 } 155 156 /* Pause if that option was specified 157 * TEST_PAUSE contains the code to fork the test with the -c option. 158 */ 159 TEST_PAUSE; 160 161 /* Save the current time values */ 162 if ((gettimeofday(&tp, (struct timezone *)&tp)) == -1) { 163 tst_brkm(TBROK, cleanup, "gettimeofday failed. " 164 "errno=%d", errno); 165 } 166 save_tv_sec = tp.tv_sec; 167 save_tv_usec = tp.tv_usec; 168 } 169 170 /* 171 * cleanup() 172 * performs all ONE TIME cleanup for this test at 173 * completion or premature exit 174 */ 175 void cleanup(void) 176 { 177 178 } 179 180 void restore_time(void) 181 { 182 /* restore the original time values. */ 183 tp.tv_sec = save_tv_sec; 184 tp.tv_usec = save_tv_usec; 185 if ((settimeofday(&tp, NULL)) == -1) { 186 tst_resm(TWARN, "FATAL COULD NOT RESET THE CLOCK"); 187 tst_resm(TFAIL, "Error Setting Time, errno=%d", errno); 188 } 189 } 190