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/*
* Copyright (c) 2005, 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 assertions:
*
* If SA_NODEFER is not set in sa_flags, the caught signal is added to the
* thread's signal mask during the handler execution.
* The steps are:
* -> register a signal handler for SIGCHLD
* -> raise SIGCHLD
* -> In handler, check for reentrance then raise SIGCHLD again.
* The test fails if signal handler if reentered or signal is not pending when raised again.
*/
/******************************************************************************/
/*************************** standard includes ********************************/
/******************************************************************************/
#include <pthread.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <errno.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 SIGNAL SIGCHLD
/******************************************************************************/
/*************************** Test case ***********************************/
/******************************************************************************/
int called = 0;
void handler(int sig LTP_ATTRIBUTE_UNUSED)
{
int ret;
sigset_t pending;
called++;
if (called == 2) {
FAILED("Signal was not masked in signal handler");
}
if (called == 1) {
/* Raise the signal again. It should be masked */
ret = raise(SIGNAL);
if (ret != 0) {
UNRESOLVED(ret, "Failed to raise SIGCHLD again");
}
/* check the signal is pending */
ret = sigpending(&pending);
if (ret != 0) {
UNRESOLVED(ret, "Failed to get pending signal set");
}
ret = sigismember(&pending, SIGNAL);
if (ret != 1) {
FAILED("signal is not pending");
}
}
called++;
}
/* main function */
int main(void)
{
int ret;
struct sigaction sa;
/* Initialize output */
output_init();
/* Set the signal handler */
sa.sa_flags = 0;
sa.sa_handler = handler;
ret = sigemptyset(&sa.sa_mask);
if (ret != 0) {
UNRESOLVED(ret, "Failed to empty signal set");
}
/* Install the signal handler for SIGCHLD */
ret = sigaction(SIGNAL, &sa, 0);
if (ret != 0) {
UNRESOLVED(ret, "Failed to set signal handler");
}
ret = raise(SIGNAL);
if (ret != 0) {
UNRESOLVED(ret, "Failed to raise SIGCHLD");
}
while (called != 4)
sched_yield();
/* Test passed */
#if VERBOSE > 0
output("Test passed\n");
#endif
PASSED;
}
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