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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_setparam04
     20  *
     21  *    EXECUTED BY       : anyone
     22  *
     23  *    TEST TITLE        : testing error conditions for sched_setparam(2)
     24  *
     25  *    TEST CASE TOTAL   : 4
     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_setparam(2) returns -1 and sets errno to ESRCH if the
     36  *	process with specified pid could not be found
     37  *   2) sched_setparam(2) returns -1 and sets errno to EINVAL if
     38  *	the parameter pid is an invalid value (-1)
     39  *   3) sched_setparam(2) returns -1 and sets errno to EINVAL if the
     40  *	parameter p is an invalid address
     41  *   4) sched_setparam(2) returns -1 sets errno to EINVAL if the
     42  *	value for p.sched_priority is other than 0 for scheduling
     43  *	policy, SCHED_OTHER
     44  *
     45  * ALGORITHM
     46  * Setup:
     47  *   Setup signal handling.
     48  *   Pause for SIGUSR1 if option specified.
     49  *
     50  *  Test:
     51  *   Loop if the proper options are given.
     52  *   Execute system call
     53  *   Check return code, if (system call failed (return=-1)) &
     54  *			   (errno set == expected errno)
     55  *              Issue sys call fails with expected return value and errno.
     56  *   Otherwise,
     57  *      Issue sys call returns unexpected value.
     58  *
     59  *  Cleanup:
     60  *        Print errno log and/or timing stats if options given
     61  *
     62  * USAGE:  <for command-line>
     63  *  sched_setparam04 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p]
     64  *		where,  -c n : Run n copies concurrently.
     65  *			-e   : Turn on errno logging.
     66  *			-h   : Show help screen
     67  *			-f   : Turn off functional testing
     68  *			-i n : Execute test n times.
     69  *			-I x : Execute test for x seconds.
     70  *			-p   : Pause for SIGUSR1 before starting
     71  *			-P x : Pause for x seconds between iterations.
     72  *			-t   : Turn on syscall timing.
     73  *
     74  *********************************************************************/
     75 
     76 #include "test.h"
     77 
     78 #include <errno.h>
     79 #include <sched.h>
     80 #include <pwd.h>
     81 
     82 static void cleanup(void);
     83 static void setup(void);
     84 
     85 static struct sched_param param = { 0 };
     86 static struct sched_param param1 = { 1 };
     87 
     88 char *TCID = "sched_setparam04";
     89 
     90 static pid_t unused_pid;
     91 static pid_t inval_pid = -1;
     92 static pid_t zero_pid;
     93 
     94 static struct test_case_t {
     95 	char *desc;
     96 	pid_t *pid;
     97 	struct sched_param *p;
     98 	int exp_errno;
     99 	char err_desc[10];
    100 } test_cases[] = {
    101 	{
    102 	"test with non-existing pid", &unused_pid, &param, ESRCH, "ESRCH"}, {
    103 	"test invalid pid value", &inval_pid, &param, EINVAL, "EINVAL"}, {
    104 	"test with invalid address for p", &zero_pid, NULL, EINVAL, "EINVAL"}, {
    105 	"test with invalid p.sched_priority", &zero_pid, &param1, EINVAL,
    106 		    "EINVAL"}
    107 };
    108 
    109 int TST_TOTAL = sizeof(test_cases) / sizeof(test_cases[0]);
    110 
    111 int main(int ac, char **av)
    112 {
    113 	int lc, ind;
    114 
    115 	tst_parse_opts(ac, av, NULL, NULL);
    116 
    117 	setup();		/* global setup */
    118 
    119 	/* The following loop checks looping state if -i option given */
    120 	for (lc = 0; TEST_LOOPING(lc); lc++) {
    121 		/* reset tst_count in case we are looping */
    122 		tst_count = 0;
    123 
    124 		for (ind = 0; ind < TST_TOTAL; ind++) {
    125 			/*
    126 			 * call the system call with the TEST() macro
    127 			 */
    128 			TEST(sched_setparam(*(test_cases[ind].pid),
    129 					    test_cases[ind].p));
    130 
    131 			if ((TEST_RETURN == -1) &&
    132 			    (TEST_ERRNO == test_cases[ind].exp_errno)) {
    133 				tst_resm(TPASS, "expected failure; Got %s",
    134 					 test_cases[ind].err_desc);
    135 			} else {
    136 				tst_resm(TFAIL, "Call failed to produce "
    137 					 "expected error;  Expected errno: %d "
    138 					 "Got : %d, %s",
    139 					 test_cases[ind].exp_errno,
    140 					 TEST_ERRNO, strerror(TEST_ERRNO));
    141 			}
    142 		}
    143 	}
    144 
    145 	cleanup();
    146 
    147 	tst_exit();
    148 }
    149 
    150 /*
    151  * setup() - performs all the ONE TIME setup for this test.
    152  */
    153 void setup(void)
    154 {
    155 	unused_pid = tst_get_unused_pid(cleanup);
    156 
    157 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
    158 
    159 	TEST_PAUSE;
    160 
    161 }
    162 
    163 /*
    164  * cleanup() -  performs all the ONE TIME cleanup for this test at completion
    165  *		or premature exit.
    166  */
    167 void cleanup(void)
    168 {
    169 
    170 }
    171