testcases/kernel/syscalls/rt_sigprocmask/rt_sigprocmask01.c

/******************************************************************************/
/* Copyright (c) Crackerjack Project., 2007                                   */
/*                                                                            */
/* This program is free software;  you can redistribute it and/or modify      */
/* it under the terms of the GNU General Public License as published by       */
/* the Free Software Foundation; either version 2 of the License, or          */
/* (at your option) any later version.                                        */
/*                                                                            */
/* This program is distributed in the hope that it will be useful,            */
/* but WITHOUT ANY WARRANTY;  without even the implied warranty of            */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See                  */
/* the GNU General Public License for more details.                           */
/*                                                                            */
/* You should have received a copy of the GNU General Public License          */
/* along with this program;  if not, write to the Free Software               */
/* Foundation, Inc., 59 Temple Place, Suite TEST_SIG0, Boston, MA 02111-1307 USA    */
/*                                                                            */
/******************************************************************************/
/******************************************************************************/
/*                                                                            */
/* File:        rt_sigprocmask01.c                                              */
/*                                                                            */
/* Description: This tests the rt_sigprocmask() syscall                       */
/*		rt_sigprocmask changes the list of currently blocked signals. */
/*		The set value stores the signal mask of the pending signals.  */
/*		The previous action on the signal is saved in oact. The value */
/*		of how indicates how the call should behave; its values are   */
/*		as follows:						      */
/*									      */
/*		SIG_BLOCK						      */
/*		    The set of blocked signals is the union of the current set*/
/*		    and the set argument. 				      */
/*		SIG_UNBLOCK						      */
/*		    The signals in set are removed from the current set of    */
/*		    blocked signals. It is okay to unblock a signal that is   */
/*		    not blocked. 					      */
/*		SIG_SETMASK						      */
/*		    The set of blocked signals is set to the set argument.    */
/*		    sigsetsize should indicate the size of a sigset_t type.   */
/*                                                                            */
/* Usage:  <for command-line>                                                 */
/* rt_sigprocmask01 [-c n] [-e][-i n] [-I x] [-p x] [-t]                      */
/*      where,  -c n : Run n copies concurrently.                             */
/*              -e   : Turn on errno logging.                                 */
/*              -i n : Execute test n times.                                  */
/*              -I x : Execute test for x seconds.                            */
/*              -P x : Pause for x seconds between iterations.                */
/*              -t   : Turn on syscall timing.                                */
/*                                                                            */
/* Total Tests: 1                                                             */
/*                                                                            */
/* Test Name:   rt_sigprocmask01                                              */
/* History:     Porting from Crackerjack to LTP is done by                    */
/*              Manas Kumar Nayak <maknayak@in.ibm.com>                       */
/******************************************************************************/
#include <stdio.h>
#include <signal.h>
#include <errno.h>

/* Harness Specific Include Files. */
#include "test.h"
#include "usctest.h"
#include "linux_syscall_numbers.h"
#define LTP_RT_SIG_TEST
#include "ltp_signal.h"

/* Extern Global Variables */

/* Global Variables */
char *TCID = "rt_sigprocmask01";	/* Test program identifier. */
int testno;
int TST_TOTAL = 8;		/* total number of tests in this file.   */

#define TEST_SIG SIGRTMIN+1

/* Extern Global Functions */
/******************************************************************************/
/*                                                                            */
/* Function:    cleanup                                                       */
/*                                                                            */
/* Description: Performs all one time clean up for this test on successful    */
/*              completion,  premature exit or  failure. Closes all temporary */
/*              files, removes all temporary directories exits the test with  */
/*              appropriate return code by calling tst_exit() function.       */
/*                                                                            */
/* Input:       None.                                                         */
/*                                                                            */
/* Output:      None.                                                         */
/*                                                                            */
/* Return:      On failure - Exits calling tst_exit(). Non '0' return code.   */
/*              On success - Exits calling tst_exit(). With '0' return code.  */
/*                                                                            */
/******************************************************************************/
void cleanup()
{

	TEST_CLEANUP;
	tst_rmdir();

}

/* Local  Functions */
/******************************************************************************/
/*                                                                            */
/* Function:    setup                                                         */
/*                                                                            */
/* Description: Performs all one time setup for this test. This function is   */
/*              typically used to capture signals, create temporary dirs      */
/*              and temporary files that may be used in the course of this    */
/*              test.                                                         */
/*                                                                            */
/* Input:       None.                                                         */
/*                                                                            */
/* Output:      None.                                                         */
/*                                                                            */
/* Return:      On failure - Exits by calling cleanup().                      */
/*              On success - returns 0.                                       */
/*                                                                            */
/******************************************************************************/
void setup()
{
	/* Capture signals if any */
	/* Create temporary directories */
	TEST_PAUSE;
	tst_tmpdir();
}

int sig_count = 0;

void sig_handler(int sig)
{
	sig_count++;
}

int main(int ac, char **av)
{
#if __x86_64
	struct kernel_sigaction act, oact;
	sig_initial(TEST_SIG);
	act.sa_flags |= SA_RESTORER;
	act.sa_restorer = restore_rt;
	act.k_sa_handler = sig_handler;
#else
	struct sigaction act, oact;
	memset(&act, 0, sizeof(act));
	memset(&oact, 0, sizeof(oact));
	act.sa_handler = sig_handler;
#endif
	sigset_t set, oset;
	int lc;
	char *msg;

	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) {
		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
	}

	setup();

	for (lc = 0; TEST_LOOPING(lc); ++lc) {
		Tst_count = 0;
		for (testno = 0; testno < TST_TOTAL; ++testno) {

			if (sigemptyset(&set) < 0) {
				tst_brkm(TFAIL | TERRNO, cleanup,
					 "sigemptyset call failed");
			}
			if (sigaddset(&set, TEST_SIG) < 0) {
				tst_brkm(TFAIL | TERRNO, cleanup,
					 "sigaddset call failed");
			}

			/* call rt_sigaction() */
			TEST(ltp_syscall(__NR_rt_sigaction, TEST_SIG, &act,
				&oact, SIGSETSIZE));
			if (TEST_RETURN < 0) {
				tst_brkm(TFAIL | TTERRNO, cleanup,
					 "rt_sigaction call failed");
			}
			/* call rt_sigprocmask() to block signal#TEST_SIG */
			TEST(ltp_syscall(__NR_rt_sigprocmask, SIG_BLOCK, &set,
				     &oset, SIGSETSIZE));
			if (TEST_RETURN == -1) {
				tst_brkm(TFAIL | TTERRNO, cleanup,
					 "rt_sigprocmask call failed");
			}
			/* Make sure that the masked process is indeed
			 * masked. */
			if (kill(getpid(), TEST_SIG) < 0) {
				tst_brkm(TFAIL | TERRNO, cleanup,
					 "call to kill() failed");
			}
			if (sig_count) {
				tst_brkm(TFAIL | TERRNO, cleanup,
					 "rt_sigprocmask() failed to change "
					 "the process's signal mask");
			} else {
				/* call rt_sigpending() */
				TEST(ltp_syscall(__NR_rt_sigpending, &oset,
					     SIGSETSIZE));
				if (TEST_RETURN == -1) {
					tst_brkm(TFAIL | TTERRNO, cleanup,
						 "rt_sigpending call failed");
				}
				TEST(sigismember(&oset, TEST_SIG));
				if (TEST_RETURN == 0) {
					tst_brkm(TFAIL | TTERRNO,
						 cleanup,
						 "sigismember call failed");
				}
				/* call rt_sigprocmask() to unblock
				 * signal#TEST_SIG */
				TEST(ltp_syscall(__NR_rt_sigprocmask,
					     SIG_UNBLOCK, &set, &oset,
					     SIGSETSIZE));
				if (TEST_RETURN == -1) {
					tst_brkm(TFAIL | TTERRNO,
						 cleanup,
						 "rt_sigprocmask call failed");
				}
				if (sig_count) {
					tst_resm(TPASS,
						 "rt_sigprocmask "
						 "functionality passed");
					break;
				} else {
					tst_brkm(TFAIL | TERRNO,
						 cleanup,
						 "rt_sigprocmask "
						 "functionality failed");
				}

			}

		}

		Tst_count++;

	}

	cleanup();
	tst_exit();
}