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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 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	: prctl02
     20  *
     21  *    EXECUTED BY	: anyone
     22  *
     23  *    TEST TITLE	: Tests for error conditions
     24  *
     25  *    TEST CASE TOTAL	: 2
     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) prctl() fails with errno, EINVAL when an invalid value is given for
     36  *	   option
     37  *	2) prctl() fails with errno, EINVAL when option is PR_SET_PDEATHSIG
     38  *	   & arg2 is not zero or a valid signal number
     39  *
     40  * 	Setup:
     41  * 	  Setup signal handling.
     42  *	  Pause for SIGUSR1 if option specified.
     43  *
     44  * 	Test:
     45  *	 Loop if the proper options are given.
     46  *	 fork a child
     47  *
     48  *	 CHILD:
     49  *		call prctl() with proper arguments
     50  *		If call fails with expected errno,
     51  *			exit with 0
     52  *		else
     53  *			exit with 1
     54  *	 PARENT:
     55  *		wait() for child.
     56  *		If child exits with exit value 0,
     57  *			Test passed
     58  *		else
     59  *			Test Failed
     60  *
     61  * 	Cleanup:
     62  * 	  Print errno log and/or timing stats if options given
     63  *
     64  * USAGE:  <for command-line>
     65  *  prctl02 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p]
     66  *			where,  -c n : Run n copies concurrently.
     67  *				-e   : Turn on errno logging.
     68  *				-h   : Show help screen
     69  *				-f   : Turn off functional testing
     70  *				-i n : Execute test n times.
     71  *				-I x : Execute test for x seconds.
     72  *				-p   : Pause for SIGUSR1 before starting
     73  *				-P x : Pause for x seconds between iterations.
     74  *				-t   : Turn on syscall timing.
     75  *
     76  ****************************************************************/
     77 
     78 #include <errno.h>
     79 #include <signal.h>
     80 #include <sys/prctl.h>
     81 #include <sys/wait.h>
     82 
     83 #include "test.h"
     84 
     85 #define OPTION_INVALID 999
     86 #define INVALID_ARG 999
     87 
     88 static void setup(void);
     89 static void cleanup(void);
     90 
     91 char *TCID = "prctl02";
     92 
     93 struct test_cases_t {
     94 	int option;
     95 	unsigned long arg2;
     96 	int exp_errno;
     97 } test_cases[] = {
     98 	{
     99 	OPTION_INVALID, 0, EINVAL}, {
    100 	PR_SET_PDEATHSIG, INVALID_ARG, EINVAL}
    101 };
    102 
    103 int TST_TOTAL = sizeof(test_cases) / sizeof(test_cases[0]);
    104 
    105 int main(int ac, char **av)
    106 {
    107 
    108 	int lc, i;
    109 	pid_t child_pid;
    110 	int status;
    111 
    112 	tst_parse_opts(ac, av, NULL, NULL);
    113 
    114 	setup();
    115 
    116 	for (lc = 0; TEST_LOOPING(lc); lc++) {
    117 
    118 		tst_count = 0;
    119 
    120 		for (i = 0; i < TST_TOTAL; ++i) {
    121 
    122 			switch (child_pid = FORK_OR_VFORK()) {
    123 
    124 			case -1:
    125 				/* fork() failed */
    126 				tst_resm(TFAIL, "fork() failed");
    127 				continue;
    128 
    129 			case 0:
    130 				/* Child */
    131 
    132 				TEST(prctl(test_cases[i].option,
    133 					   test_cases[i].arg2));
    134 				if ((TEST_RETURN == -1) && (TEST_ERRNO ==
    135 							    test_cases
    136 							    [i].exp_errno)) {
    137 					exit(TEST_ERRNO);
    138 				} else {
    139 					tst_resm(TWARN | TTERRNO,
    140 						 "prctl() returned %ld",
    141 						 TEST_RETURN);
    142 					exit(TEST_ERRNO);
    143 				}
    144 
    145 			default:
    146 				/* Parent */
    147 				if ((waitpid(child_pid, &status, 0)) < 0) {
    148 					tst_resm(TFAIL, "waitpid() failed");
    149 					continue;
    150 				}
    151 
    152 				if ((WIFEXITED(status)) && (WEXITSTATUS(status)
    153 							    ==
    154 							    test_cases
    155 							    [i].exp_errno)) {
    156 					tst_resm(TPASS, "Test Passed");
    157 				} else {
    158 					tst_resm(TFAIL, "Test Failed");
    159 				}
    160 
    161 			}
    162 		}
    163 	}
    164 
    165 	/* cleanup and exit */
    166 	cleanup();
    167 
    168 	tst_exit();
    169 
    170 }
    171 
    172 /* setup() - performs all ONE TIME setup for this test */
    173 void setup(void)
    174 {
    175 
    176 	tst_sig(FORK, DEF_HANDLER, cleanup);
    177 
    178 	TEST_PAUSE;
    179 
    180 }
    181 
    182 /*
    183  *cleanup() -  performs all ONE TIME cleanup for this test at
    184  *		completion or premature exit.
    185  */
    186 void cleanup(void)
    187 {
    188 
    189 }
    190