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      1 /*
      2  * Copyright (c) Wipro Technologies Ltd, 2002.  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
     13  * along with this program;  if not, write to the Free Software
     14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
     15  *
     16  */
     17  /*******************************************************************
     18  *
     19  *    TEST IDENTIFIER   : sched_getparam03
     20  *
     21  *    EXECUTED BY       : anyone
     22  *
     23  *    TEST TITLE        : testing error conditions for sched_getparam(2)
     24  *
     25  *    TEST CASE TOTAL   : 3
     26  *
     27  *    AUTHOR            : Saji Kumar.V.R <saji.kumar (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  * 	Verify that,
     35  *   1) sched_getparam(2) returns -1 and sets errno to ESRCH if the
     36  *	process with specified pid could not be found
     37  *   2) sched_getparam(2) returns -1 and sets errno to EINVAL if
     38  *	the parameter pid is an invalid value (-1)
     39  *   3) sched_getparam(2) returns -1 and sets errno to EINVAL if the
     40  *	parameter p is an invalid address
     41  *
     42  * ALGORITHM
     43  * Setup:
     44  *   Setup signal handling.
     45  *   Pause for SIGUSR1 if option specified.
     46  *
     47  *  Test:
     48  *   Loop if the proper options are given.
     49  *   Execute system call
     50  *   Check return code, if (system call failed (return=-1)) &
     51  *			   (errno set == expected errno)
     52  *              Issue sys call fails with expected return value and errno.
     53  *   Otherwise,
     54  *      Issue sys call returns unexpected value.
     55  *
     56  *  Cleanup:
     57  *        Print errno log and/or timing stats if options given
     58  *
     59  * USAGE:  <for command-line>
     60  *  sched_getparam03 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p]
     61  *		where,  -c n : Run n copies concurrently.
     62  *			-e   : Turn on errno logging.
     63  *			-h   : Show help screen
     64  *			-f   : Turn off functional testing
     65  *			-i n : Execute test n times.
     66  *			-I x : Execute test for x seconds.
     67  *			-p   : Pause for SIGUSR1 before starting
     68  *			-P x : Pause for x seconds between iterations.
     69  *			-t   : Turn on syscall timing.
     70  *
     71  *********************************************************************/
     72 
     73 #include "test.h"
     74 
     75 #include <errno.h>
     76 #include <sched.h>
     77 
     78 #define LARGE_PID 999999
     79 
     80 static void cleanup(void);
     81 static void setup(void);
     82 
     83 static struct sched_param param;
     84 
     85 char *TCID = "sched_getparam03";
     86 
     87 static pid_t unused_pid;
     88 static pid_t zero_pid;
     89 static pid_t inval_pid = -1;
     90 
     91 static struct test_case_t {
     92 	char *desc;
     93 	pid_t *pid;
     94 	struct sched_param *p;
     95 	int exp_errno;
     96 	char err_desc[10];
     97 } test_cases[] = {
     98 	{
     99 	"test with non-existing pid", &unused_pid, &param, ESRCH, "ESRCH"}, {
    100 	"test invalid pid value", &inval_pid, &param, EINVAL, "EINVAL"}, {
    101 	"test with invalid address for p", &zero_pid, NULL, EINVAL, "EINVAL"},};
    102 
    103 int TST_TOTAL = sizeof(test_cases) / sizeof(test_cases[0]);
    104 
    105 int main(int ac, char **av)
    106 {
    107 	int lc, ind;
    108 
    109 	tst_parse_opts(ac, av, NULL, NULL);
    110 
    111 	setup();		/* global setup */
    112 
    113 	/* The following loop checks looping state if -i option given */
    114 	for (lc = 0; TEST_LOOPING(lc); lc++) {
    115 		/* reset tst_count in case we are looping */
    116 		tst_count = 0;
    117 
    118 		for (ind = 0; ind < TST_TOTAL; ind++) {
    119 
    120 			/* Call sched_getparam(2) to test different test
    121 			 * conditions. verify that it fails with -1 return
    122 			 * value and sets appropriate errno.
    123 			 */
    124 			TEST(sched_getparam(*(test_cases[ind].pid),
    125 					    test_cases[ind].p));
    126 
    127 			if ((TEST_RETURN == -1) &&
    128 			    (TEST_ERRNO == test_cases[ind].exp_errno)) {
    129 				tst_resm(TPASS, "expected failure; Got %s",
    130 					 test_cases[ind].err_desc);
    131 			} else {
    132 				tst_resm(TFAIL, "Call failed to produce "
    133 					 "expected error;  Expected errno: %d "
    134 					 "Got : %d, %s",
    135 					 test_cases[ind].exp_errno,
    136 					 TEST_ERRNO, strerror(TEST_ERRNO));
    137 			}
    138 		}
    139 	}
    140 
    141 	cleanup();
    142 	tst_exit();
    143 
    144 }
    145 
    146 /*
    147  * setup() - performs all the ONE TIME setup for this test.
    148  */
    149 void setup(void)
    150 {
    151 	unused_pid = tst_get_unused_pid(cleanup);
    152 
    153 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
    154 
    155 	TEST_PAUSE;
    156 
    157 }
    158 
    159 /*
    160  * cleanup() -  performs all the ONE TIME cleanup for this test at completion
    161  * 		or premature exit.
    162  */
    163 void cleanup(void)
    164 {
    165 }
    166