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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	: prctl01
     20  *
     21  *    EXECUTED BY	: anyone
     22  *
     23  *    TEST TITLE	: Basic test for prctl(2)
     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  *	This is a Phase I test for the prctl(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  *	 fork a child
     44  *
     45  *	 CHILD:
     46  *		call prctl() with proper arguments
     47  *		If call succeeds,
     48  *			exit with 0
     49  *		else
     50  *			exit with 1
     51  *	 PARENT:
     52  *		wait() for child.
     53  *		If child exits with exit value 0,
     54  *			Test passed
     55  *		else
     56  *			Test Failed
     57  *
     58  * 	Cleanup:
     59  * 	  Print errno log and/or timing stats if options given
     60  *
     61  * USAGE:  <for command-line>
     62  *  prctl01 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p]
     63  *			where,  -c n : Run n copies concurrently.
     64  *				-e   : Turn on errno logging.
     65  *				-h   : Show help screen
     66  *				-f   : Turn off functional testing
     67  *				-i n : Execute test n times.
     68  *				-I x : Execute test for x seconds.
     69  *				-p   : Pause for SIGUSR1 before starting
     70  *				-P x : Pause for x seconds between iterations.
     71  *				-t   : Turn on syscall timing.
     72  *
     73  ****************************************************************/
     74 
     75 #include <errno.h>
     76 #include <signal.h>
     77 #include <sys/prctl.h>
     78 #include <sys/wait.h>
     79 
     80 #include "test.h"
     81 
     82 static void setup(void);
     83 static void cleanup(void);
     84 
     85 char *TCID = "prctl01";
     86 
     87 int option[2] = { PR_GET_PDEATHSIG, PR_SET_PDEATHSIG };
     88 
     89 int TST_TOTAL = 2;
     90 
     91 int main(int ac, char **av)
     92 {
     93 
     94 	int lc, i;
     95 	pid_t child_pid;
     96 	int status, sig;
     97 
     98 	tst_parse_opts(ac, av, NULL, NULL);
     99 
    100 	setup();
    101 
    102 	for (lc = 0; TEST_LOOPING(lc); lc++) {
    103 
    104 		tst_count = 0;
    105 
    106 		for (i = 0; i < TST_TOTAL; ++i) {
    107 
    108 			switch (child_pid = FORK_OR_VFORK()) {
    109 
    110 			case -1:
    111 				/* fork() failed */
    112 				tst_resm(TFAIL, "fork() failed");
    113 				continue;
    114 
    115 			case 0:
    116 				/* Child */
    117 				if (i == 1) {
    118 					sig = SIGUSR2;
    119 					TEST(prctl(option[i], sig));
    120 				} else {
    121 					TEST(prctl(option[i], &sig));
    122 				}
    123 
    124 				if (TEST_RETURN == 0) {
    125 					exit(0);
    126 				} else {
    127 					tst_resm(TWARN | TTERRNO,
    128 						 "prctl() returned %ld",
    129 						 TEST_RETURN);
    130 					exit(1);
    131 				}
    132 
    133 			default:
    134 				/* Parent */
    135 				if ((waitpid(child_pid, &status, 0)) < 0) {
    136 					tst_resm(TFAIL, "waitpid() failed");
    137 					continue;
    138 				}
    139 
    140 				if ((WIFEXITED(status)) &&
    141 				    (WEXITSTATUS(status) == 0)) {
    142 					tst_resm(TPASS, "Test Passed");
    143 				} else {
    144 					tst_resm(TFAIL, "Test Failed");
    145 				}
    146 
    147 			}
    148 		}
    149 	}
    150 
    151 	/* cleanup and exit */
    152 	cleanup();
    153 	tst_exit();
    154 
    155 }
    156 
    157 /* setup() - performs all ONE TIME setup for this test */
    158 void setup(void)
    159 {
    160 
    161 	tst_sig(FORK, DEF_HANDLER, cleanup);
    162 
    163 	TEST_PAUSE;
    164 
    165 }
    166 
    167 /*
    168  *cleanup() -  performs all ONE TIME cleanup for this test at
    169  *		completion or premature exit.
    170  */
    171 void cleanup(void)
    172 {
    173 
    174 }
    175