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/*
* Copyright (c) 2003, Intel Corporation. All rights reserved.
* Created by: salwan.searty REMOVE-THIS AT intel DOT com
* This file is licensed under the GPL license. For the full content
* of this license, see the COPYING file at the top level of this
* source tree.
Assumption: The test assumes that this program is run under normal conditions,
and not when the processor and other resources are too stressed.
Steps:
1. Fork() a child process. Have the child suspend itself.
2. From the parent, send the child a SIGUSR1 signal so that the child returns from
suspension.
3. In the child process, make sure that sigsuspend returns a -1 and pass that info
to the parent process.
*/
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "posixtest.h"
void handler(int signo LTP_ATTRIBUTE_UNUSED)
{
printf("Now inside signal handler\n");
}
int main(void)
{
pid_t pid;
pid = fork();
if (pid == 0) {
/* child */
sigset_t tempmask;
struct sigaction act;
act.sa_handler = handler;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
sigemptyset(&tempmask);
if (sigaction(SIGUSR1, &act, 0) == -1) {
perror
("Unexpected error while attempting to pre-conditions");
return 3;
}
printf("suspending child\n");
if (sigsuspend(&tempmask) != -1) {
perror("sigsuspend error");
return 1;
}
printf("returned from suspend\n");
sleep(1);
return 2;
} else {
int s;
int exit_status;
/* parent */
sleep(1);
printf("parent sending child a SIGUSR1 signal\n");
kill(pid, SIGUSR1);
if (wait(&s) == -1) {
perror("Unexpected error while setting up test "
"pre-conditions");
return PTS_UNRESOLVED;
}
exit_status = WEXITSTATUS(s);
printf("Exit status from child is %d\n", exit_status);
if (exit_status == 1) {
printf("Test FAILED\n");
return PTS_FAIL;
}
if (exit_status == 2) {
printf("Test PASSED\n");
return PTS_PASS;
}
if (exit_status == 3) {
return PTS_UNRESOLVED;
}
printf
("Child didn't exit with any of the expected return codes\n");
return PTS_UNRESOLVED;
}
}
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