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      1 /*
      2  * Copyright (c) Wipro Technologies Ltd, 2003.  All Rights Reserved.
      3  * Copyright (c) 2011 Cyril Hrubis <chrubis (at) suse.cz>
      4  *
      5  * This program is free software; you can redistribute it and/or modify it
      6  * under the terms of version 2 of the GNU General Public License as
      7  * published by the Free Software Foundation.
      8  *
      9  * This program is distributed in the hope that it would be useful, but
     10  * WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
     12  *
     13  * You should have received a copy of the GNU General Public License along
     14  * with this program; if not, write the Free Software Foundation, Inc.,
     15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
     16  *
     17  */
     18 
     19 #include <errno.h>
     20 #include <time.h>
     21 #include <pwd.h>
     22 #include <unistd.h>
     23 
     24 #include "test.h"
     25 #include "common_timers.h"
     26 
     27 static void setup(void);
     28 static void cleanup(void);
     29 static int setup_test(int option);
     30 
     31 clockid_t clocks[] = {
     32 	CLOCK_REALTIME,
     33 	CLOCK_MONOTONIC,
     34 	MAX_CLOCKS,
     35 	MAX_CLOCKS + 1,
     36 	CLOCK_REALTIME,
     37 	CLOCK_REALTIME,
     38 	CLOCK_REALTIME,
     39 	CLOCK_PROCESS_CPUTIME_ID,
     40 	CLOCK_THREAD_CPUTIME_ID
     41 };
     42 
     43 int testcases[] = {
     44 	EFAULT,			/* tp bad               */
     45 	EINVAL,			/* CLOCK_MONOTONIC      */
     46 	EINVAL,			/* MAX_CLOCKS           */
     47 	EINVAL,			/* MAX_CLOCKS + 1       */
     48 	EINVAL,			/* Invalid timespec     */
     49 	EINVAL,			/* NSEC_PER_SEC + 1     */
     50 	EPERM,			/* non-root user        */
     51 	EINVAL,			/* PROCESS_CPUTIME_ID	*/
     52 	EINVAL,			/* THREAD_CPUTIME_ID	*/
     53 };
     54 
     55 char *TCID = "clock_settime03";
     56 int TST_TOTAL = ARRAY_SIZE(testcases);
     57 
     58 char nobody_uid[] = "nobody";
     59 struct passwd *ltpuser;
     60 static struct timespec spec, *temp, saved;
     61 
     62 int main(int ac, char **av)
     63 {
     64 	int lc, i;
     65 
     66 	tst_parse_opts(ac, av, NULL, NULL);
     67 
     68 	setup();
     69 
     70 	for (lc = 0; TEST_LOOPING(lc); lc++) {
     71 
     72 		tst_count = 0;
     73 
     74 		for (i = 0; i < TST_TOTAL; i++) {
     75 
     76 			if (setup_test(i) < 0)
     77 				continue;
     78 
     79 			TEST(ltp_syscall(__NR_clock_settime, clocks[i], temp));
     80 
     81 			/* Change the UID back to root */
     82 			if (i == TST_TOTAL - 1) {
     83 				if (seteuid(0) == -1) {
     84 					tst_brkm(TBROK | TERRNO, cleanup,
     85 						 "Failed to set the effective "
     86 						 "uid to root");
     87 				}
     88 			}
     89 
     90 			/* check return code */
     91 			if (TEST_RETURN == -1 && TEST_ERRNO == testcases[i]) {
     92 				tst_resm(TPASS | TTERRNO,
     93 					 "clock_settime(2) got expected "
     94 					 "failure.");
     95 			} else {
     96 				tst_resm(TFAIL | TTERRNO,
     97 					 "clock_settime(2) failed to produce "
     98 					 "expected error (return code = %ld)",
     99 					 TEST_RETURN);
    100 				/* Restore the clock to its previous state. */
    101 				if (TEST_RETURN == 0) {
    102 					if (ltp_syscall(__NR_clock_settime,
    103 						    CLOCK_REALTIME,
    104 						    &saved) < 0) {
    105 						tst_resm(TWARN | TERRNO,
    106 							 "FATAL: could not set "
    107 							 "the clock!");
    108 					}
    109 				}
    110 			}
    111 
    112 		}
    113 
    114 	}
    115 
    116 	cleanup();
    117 	tst_exit();
    118 }
    119 
    120 static int setup_test(int option)
    121 {
    122 	/* valid timespec */
    123 	spec = saved;
    124 	temp = &spec;
    125 
    126 	/* error sceanrios */
    127 	switch (option) {
    128 	case 0:
    129 		/* Make tp argument bad pointer */
    130 		temp = (struct timespec *)-1;
    131 		break;
    132 	case 4:
    133 		/* Make the parameter of timespec invalid */
    134 		spec.tv_nsec = -1;
    135 		break;
    136 	case 5:
    137 		/* Make the parameter of timespec invalid */
    138 		spec.tv_nsec = NSEC_PER_SEC + 1;
    139 		break;
    140 	case 6:
    141 		/* change the User to non-root */
    142 		spec.tv_nsec = 0;
    143 		if ((ltpuser = getpwnam(nobody_uid)) == NULL) {
    144 			tst_resm(TWARN, "user \"nobody\" not present; "
    145 				 "skipping test");
    146 			return -1;
    147 		}
    148 		if (seteuid(ltpuser->pw_uid) == -1) {
    149 			tst_resm(TWARN | TERRNO,
    150 				 "seteuid failed to set the effective "
    151 				 "uid to %d (nobody)", ltpuser->pw_uid);
    152 			return -1;
    153 		}
    154 		break;
    155 	}
    156 	return 0;
    157 }
    158 
    159 static void setup(void)
    160 {
    161 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
    162 
    163 	tst_require_root();
    164 
    165 	if (ltp_syscall(__NR_clock_gettime, CLOCK_REALTIME, &saved) < 0)
    166 		tst_brkm(TBROK, NULL, "Clock gettime failed");
    167 
    168 	spec.tv_sec = 1;
    169 	spec.tv_nsec = 0;
    170 
    171 	TEST_PAUSE;
    172 }
    173 
    174 static void cleanup(void)
    175 {
    176 }
    177