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      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