SIGCONT: don't terminate process

Change-Id: Ib959a9e5341fda37bd055724ecb9319a469b7420
Refs: #1410

test/issues/1410+1420/C1420T01.c

@@ -0,0 +1,64 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/wait.h>
+
+void
+cont(int s)
+{
+	printf("SIGCONT\n");
+	exit(1);
+}
+
+void
+child()
+{
+	int mask;
+
+	mask = sigmask(SIGCONT);
+	sigprocmask(SIG_BLOCK, (sigset_t *)&mask, NULL);
+	signal(SIGCONT, cont);
+	for (;;) {
+		printf(".\n");
+		sleep(1);
+	}
+}
+
+int
+main(int argc, char **argv)
+{
+	pid_t pid = fork();
+	int st;
+
+	if (!pid)
+		child();
+	printf("*** C1420T01: START\n");
+	sleep(3);
+	printf("send SIGSTOP\n");
+	kill(pid, SIGSTOP);
+	sleep(3);
+	printf("send SIGCONT\n");
+	kill(pid, SIGCONT);
+	sleep(3);
+	printf("send SIGINT\n");
+	kill(pid, SIGINT);
+	waitpid(pid, &st, 0);
+	printf("*** C1420T01 ");
+	if (WIFEXITED(st)) {
+		printf("FAIL: child exited st=%d\n", WEXITSTATUS(st));
+	}
+	else if (WIFSIGNALED(st)) {
+		if (WTERMSIG(st) == SIGINT) {
+			printf("PASS");
+		}
+		else {
+			printf("FAIL");
+		}
+		printf(": child terminated by signal %d\n", WTERMSIG(st));
+	}
+	else {
+		printf("FAIL: child status=%08x\n", st);
+	}
+	exit(0);
+}