text: /*
  * Copyright (c) 2004, Bull S.A..  All rights reserved.
  * Created by: Sebastien Decugis
  
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2 of the GNU General Public License as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it would be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  *
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, write the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  
  * This sample test aims to check the following assertion:
  *
  * The function does not return EINTR
  
  * The steps are:
  * -> kill a thread which calls pthread_kill
  * -> check that EINTR is never returned
  
  */
  
  
  /********************************************************************************************/
  /****************************** standard includes *****************************************/
  /********************************************************************************************/
  #include <pthread.h>
  #include <stdarg.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  
  #include <semaphore.h>
  #include <errno.h>
  #include <signal.h>
  
  /********************************************************************************************/
  /******************************   Test framework   *****************************************/
  /********************************************************************************************/
  #include "../testfrmw/testfrmw.h"
  #include "../testfrmw/testfrmw.c"
  /* This header is responsible for defining the following macros:
   * UNRESOLVED(ret, descr);
   *    where descr is a description of the error and ret is an int (error code for example)
   * FAILED(descr);
   *    where descr is a short text saying why the test has failed.
   * PASSED();
   *    No parameter.
   *
   * Both three macros shall terminate the calling process.
   * The testcase shall not terminate in any other maneer.
   *
   * The other file defines the functions
   * void output_init()
   * void output(char * string, ...)
   *
   * Those may be used to output information.
   */
  
  /********************************************************************************************/
  /********************************** Configuration ******************************************/
  /********************************************************************************************/
  #ifndef VERBOSE
  #define VERBOSE 1
  #endif
  
  #define WITH_SYNCHRO
  
  /********************************************************************************************/
  /***********************************    Test cases  *****************************************/
  /********************************************************************************************/
  
  char do_it = 1;
  unsigned long count_ope = 0;
  #ifdef WITH_SYNCHRO
  sem_t semsig1;
  sem_t semsig2;
  unsigned long count_sig = 0;
  #endif
  
  sigset_t usersigs;
  
  typedef struct {
  	int sig;
  #ifdef WITH_SYNCHRO
  	sem_t *sem;
  #endif
  } thestruct;
  
  /* the following function keeps on sending the signal to the process */
  void *sendsig(void *arg)
  {
  	thestruct *thearg = (thestruct *) arg;
  	int ret;
  	pid_t process;
  
  	process = getpid();
  
  	/* We block the signals SIGUSR1 and SIGUSR2 for this THREAD */
  	ret = pthread_sigmask(SIG_BLOCK, &usersigs, NULL);
  
  	if (ret != 0) {
  		UNRESOLVED(ret,
  			   "Unable to block SIGUSR1 and SIGUSR2 in signal thread");
  	}
  
  	while (do_it) {
  #ifdef WITH_SYNCHRO
  
  		if ((ret = sem_wait(thearg->sem))) {
  			UNRESOLVED(errno, "Sem_wait in sendsig");
  		}
  
  		count_sig++;
  #endif
  
  		ret = kill(process, thearg->sig);
  
  		if (ret != 0) {
  			UNRESOLVED(errno, "Kill in sendsig");
  		}
  
  	}
  
  	return NULL;
  }
  
  /* Next are the signal handlers. */
  /* This one is registered for signal SIGUSR1 */
  void sighdl1(int sig LTP_ATTRIBUTE_UNUSED)
  {
  #ifdef WITH_SYNCHRO
  
  	if (sem_post(&semsig1)) {
  		UNRESOLVED(errno, "Sem_post in signal handler 1");
  	}
  #endif
  }
  
  /* This one is registered for signal SIGUSR2 */
  void sighdl2(int sig LTP_ATTRIBUTE_UNUSED)
  {
  #ifdef WITH_SYNCHRO
  
  	if (sem_post(&semsig2)) {
  		UNRESOLVED(errno, "Sem_post in signal handler 2");
  	}
  #endif
  }
  
  int init_ctl;
  /* Init function */
  void initializer(void)
  {
  	init_ctl++;
  	return;
  }
  
  /* Test function -- calls pthread_kill() and checks that EINTR is never returned. */
  void *test(void *arg LTP_ATTRIBUTE_UNUSED)
  {
  	int ret = 0;
  
  	/* We don't block the signals SIGUSR1 and SIGUSR2 for this THREAD */
  	ret = pthread_sigmask(SIG_UNBLOCK, &usersigs, NULL);
  
  	if (ret != 0) {
  		UNRESOLVED(ret,
  			   "Unable to unblock SIGUSR1 and SIGUSR2 in worker thread");
  	}
  
  	while (do_it) {
  		count_ope++;
  
  		ret = pthread_kill(pthread_self(), 0);
  
  		if (ret == EINTR) {
  			FAILED("pthread_kill returned EINTR");
  		}
  
  		if (ret != 0) {
  			UNRESOLVED(ret,
  				   "pthread_kill returned an unexpected error");
  		}
  
  		ret = pthread_kill(pthread_self(), SIGUSR1);
  
  		if (ret == EINTR) {
  			FAILED("pthread_kill returned EINTR");
  		}
  
  		if (ret != 0) {
  			UNRESOLVED(ret,
  				   "pthread_kill returned an unexpected error");
  		}
  	}
  
  	return NULL;
  }
  
  /* Main function */
  int main(void)
  {
  	int ret;
  	pthread_t th_work, th_sig1, th_sig2;
  	thestruct arg1, arg2;
  
  	struct sigaction sa;
  
  	/* Initialize output routine */
  	output_init();
  
  	/* We need to register the signal handlers for the PROCESS */
  	sigemptyset(&sa.sa_mask);
  	sa.sa_flags = 0;
  	sa.sa_handler = sighdl1;
  
  	if ((ret = sigaction(SIGUSR1, &sa, NULL))) {
  		UNRESOLVED(ret, "Unable to register signal handler1");
  	}
  
  	sa.sa_handler = sighdl2;
  
  	if ((ret = sigaction(SIGUSR2, &sa, NULL))) {
  		UNRESOLVED(ret, "Unable to register signal handler2");
  	}
  
  	/* We prepare a signal set which includes SIGUSR1 and SIGUSR2 */
  	sigemptyset(&usersigs);
  
  	ret = sigaddset(&usersigs, SIGUSR1);
  
  	ret |= sigaddset(&usersigs, SIGUSR2);
  
  	if (ret != 0) {
  		UNRESOLVED(ret, "Unable to add SIGUSR1 or 2 to a signal set");
  	}
  
  	/* We now block the signals SIGUSR1 and SIGUSR2 for this THREAD */
  	ret = pthread_sigmask(SIG_BLOCK, &usersigs, NULL);
  
  	if (ret != 0) {
  		UNRESOLVED(ret,
  			   "Unable to block SIGUSR1 and SIGUSR2 in main thread");
  	}
  #ifdef WITH_SYNCHRO
  	if (sem_init(&semsig1, 0, 1)) {
  		UNRESOLVED(errno, "Semsig1  init");
  	}
  
  	if (sem_init(&semsig2, 0, 1)) {
  		UNRESOLVED(errno, "Semsig2  init");
  	}
  #endif
  
  	if ((ret = pthread_create(&th_work, NULL, test, NULL))) {
  		UNRESOLVED(ret, "Worker thread creation failed");
  	}
  
  	arg1.sig = SIGUSR1;
  	arg2.sig = SIGUSR2;
  #ifdef WITH_SYNCHRO
  	arg1.sem = &semsig1;
  	arg2.sem = &semsig2;
  #endif
  
  	if ((ret = pthread_create(&th_sig1, NULL, sendsig, (void *)&arg1))) {
  		UNRESOLVED(ret, "Signal 1 sender thread creation failed");
  	}
  
  	if ((ret = pthread_create(&th_sig2, NULL, sendsig, (void *)&arg2))) {
  		UNRESOLVED(ret, "Signal 2 sender thread creation failed");
  	}
  
  	/* Let's wait for a while now */
  	sleep(1);
  
  	/* Now stop the threads and join them */
  	do {
  		do_it = 0;
  	}
  	while (do_it);
  
  	if ((ret = pthread_join(th_sig1, NULL))) {
  		UNRESOLVED(ret, "Signal 1 sender thread join failed");
  	}
  
  	if ((ret = pthread_join(th_sig2, NULL))) {
  		UNRESOLVED(ret, "Signal 2 sender thread join failed");
  	}
  
  	if ((ret = pthread_join(th_work, NULL))) {
  		UNRESOLVED(ret, "Worker thread join failed");
  	}
  #if VERBOSE > 0
  	output("Test executed successfully.\n");
  
  	output("  %d operations.\n", count_ope);
  
  #ifdef WITH_SYNCHRO
  	output("  %d signals were sent meanwhile.\n", count_sig);
  
  #endif
  #endif
  	PASSED;
  }
  