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      1 /*
      2  * Copyright (c) Wipro Technologies Ltd, 2003.  All Rights Reserved.
      3  *
      4  * This program is free software; you can redistribute it and/or modify it
      5  * under the terms of version 2 of the GNU General Public License as
      6  * published by the Free Software Foundation.
      7  *
      8  * This program is distributed in the hope that it would be useful, but
      9  * WITHOUT ANY WARRANTY; without even the implied warranty of
     10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
     11  *
     12  * You should have received a copy of the GNU General Public License along
     13  * with this program; if not, write the Free Software Foundation, Inc.,
     14  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
     15  *
     16  */
     17 /**************************************************************************
     18  *
     19  *    TEST IDENTIFIER	: clock_settime02
     20  *
     21  *    EXECUTED BY	: root / superuser
     22  *
     23  *    TEST TITLE	: Basic test for clock_settime(2)
     24  *
     25  *    TEST CASE TOTAL	: 1
     26  *
     27  *    AUTHOR		: Aniruddha Marathe <aniruddha.marathe (at) wipro.com>
     28  *
     29  *    SIGNALS
     30  * 	Uses SIGUSR1 to pause before test if option set.
     31  * 	(See the parse_opts(3) man page).
     32  *
     33  *    DESCRIPTION
     34  *     This is a Phase I test for the clock_settime(2) system call.
     35  *     It is intended to provide a limited exposure of the system call.
     36  *
     37  * 	Setup:
     38  *	  Setup signal handling.
     39  *	  Pause for SIGUSR1 if option specified.
     40  *
     41  * 	Test:
     42  *	 Loop if the proper options are given.
     43  *	 Set the parameters of timespec struct
     44  *	 Execute system call
     45  *	 Check return code, if system call failed (return=-1)
     46  *		Log the errno and Issue a FAIL message.
     47  *	 Otherwise, Issue a PASS message.
     48  *
     49  * 	Cleanup:
     50  * 	  Print errno log and/or timing stats if options given
     51  *
     52  * USAGE:  <for command-line>
     53  * clock_settime02 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-p]
     54  * where:
     55  * 	-c n : Run n copies simultaneously.
     56  *	-e   : Turn on errno logging.
     57  *	-i n : Execute test n times.
     58  *	-I x : Execute test for x seconds.
     59  *	-p   : Pause for SIGUSR1 before starting
     60  *	-P x : Pause for x seconds between iterations.
     61  *	-t   : Turn on syscall timing.
     62  *
     63  *RESTRICTIONS:
     64  * None
     65  *****************************************************************************/
     66 
     67 #include <stdlib.h>
     68 #include <errno.h>
     69 #include <time.h>
     70 #include <signal.h>
     71 
     72 #include "test.h"
     73 #include "common_timers.h"
     74 
     75 static void setup(void);
     76 static void cleanup(void);
     77 
     78 char *TCID = "clock_settime02";
     79 int TST_TOTAL = 1;
     80 static struct timespec saved;
     81 
     82 int main(int ac, char **av)
     83 {
     84 	int lc;
     85 	struct timespec spec;
     86 
     87 	tst_parse_opts(ac, av, NULL, NULL);
     88 
     89 	setup();
     90 
     91 	for (lc = 0; TEST_LOOPING(lc); lc++) {
     92 
     93 		tst_count = 0;
     94 
     95 		spec.tv_sec = saved.tv_sec + 1;
     96 		spec.tv_nsec = 0;
     97 
     98 		TEST(ltp_syscall(__NR_clock_settime, CLOCK_REALTIME, &spec));
     99 		tst_resm((TEST_RETURN < 0 ? TFAIL | TTERRNO : TPASS),
    100 			 "clock_settime %s",
    101 			 (TEST_RETURN == 0 ? "passed" : "failed"));
    102 	}
    103 
    104 	cleanup();
    105 	tst_exit();
    106 }
    107 
    108 static void setup(void)
    109 {
    110 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
    111 
    112 	tst_require_root();
    113 
    114 	/* Save the current time specifications */
    115 	if (ltp_syscall(__NR_clock_gettime, CLOCK_REALTIME, &saved) < 0)
    116 		tst_brkm(TBROK, NULL, "Could not save the current time");
    117 
    118 	TEST_PAUSE;
    119 }
    120 
    121 static void cleanup(void)
    122 {
    123 	/* Set the saved time */
    124 	if (clock_settime(CLOCK_REALTIME, &saved) < 0) {
    125 		tst_resm(TWARN, "FATAL COULD NOT RESET THE CLOCK");
    126 		tst_resm(TFAIL, "Error Setting Time, errno=%d", errno);
    127 	}
    128 }
    129