Regression test to check that ioctl calls are restarted properly after

being interrupted.  Currently they are not.

regress/lib/libc/sys/Makefile

@@ -0,0 +1,5 @@
+#	$NetBSD: Makefile,v 1.1 2001/09/20 16:56:52 atatat Exp $
+
+SUBDIR+= ttyio
+
+.include <bsd.subdir.mk>

regress/lib/libc/sys/Makefile.inc

@@ -0,0 +1,4 @@
+#	$NetBSD: Makefile.inc,v 1.1 2001/09/20 16:56:52 atatat Exp $
+#
+# do not install regression test programs
+proginstall::

regress/lib/libc/sys/ttyio/Makefile

@@ -0,0 +1,16 @@
+#	$NetBSD: Makefile,v 1.1 2001/09/20 16:56:53 atatat Exp $
+
+PROG=	ioctl
+MKMAN=	no
+WARNS=	2
+LDADD+=	-lutil
+DPADD+=	${LIBUTIL}
+
+regress: ${PROG}
+	@if ./ioctl > /dev/null; then \
+		echo "PASSED"; \
+	else \
+		echo "FAILED"; \
+	fi
+
+.include <bsd.prog.mk>

regress/lib/libc/sys/ttyio/ioctl.c

@@ -0,0 +1,153 @@
+/*	$NetBSD: ioctl.c,v 1.1 2001/09/20 16:56:53 atatat Exp $	*/
+
+/*
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Andrew Brown.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the NetBSD
+ *      Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__RCSID("$NetBSD: ioctl.c,v 1.1 2001/09/20 16:56:53 atatat Exp $");
+#endif
+
+#include <errno.h>
+#include <stdio.h>
+#include <termios.h>
+#include <signal.h>
+#include <unistd.h>
+#include <string.h>
+#include <err.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#if defined(__NetBSD__)
+#include <util.h>
+#elif defined(__bsdi__)
+int openpty(int *, int *, char *, struct termios *, struct winsize *);
+#elif defined(__FreeBSD__)
+#include <libutil.h>
+#else
+#error where openpty?
+#endif
+
+/* ARGSUSED */
+static void
+sigchld(int nsig)
+{
+	if (wait(NULL) == -1)
+		err(1, "wait");
+}
+
+/* ARGSUSED */
+int
+main(int argc, char *argv[])
+{
+	int m, s, rc;
+	char name[128], buf[128];
+	struct termios term;
+	struct sigaction sa;
+
+	/* unbuffer stdout */
+	setbuf(stdout, NULL);
+
+	/* get terminal settings for later use */
+	if (tcgetattr(STDIN_FILENO, &term) == -1)
+		err(1, "tcgetattr");
+
+	/* get a tty */
+	if (openpty(&m, &s, name, &term, NULL) == -1)
+		err(1, "openpty"); 
+
+	switch (fork()) {
+	case -1:
+		err(1, "fork");
+		/* NOTREACHED */
+	case 0:
+		/* wait for parent to get set up */
+		(void) sleep(1);
+		(void) printf("child1: exiting\n");
+		exit(0);
+		/* NOTREACHED */
+	default:
+		(void) printf("parent: spawned child1\n");
+		break;
+	}
+
+	switch (fork()) {
+	case -1:
+		err(1, "fork");
+		/* NOTREACHED */
+	case 0:
+		/* wait for parent to get upset */
+		(void) sleep(2);
+		/* drain the tty q */
+		if (read(m, buf, sizeof(buf)) == -1)
+			err(1, "read");
+		(void) printf("child2: exiting\n");
+		exit(0);
+		/* NOTREACHED */
+	default:
+		(void) printf("parent: spawned child2\n");
+		break;
+	}
+
+	/* set up a restarting signal handler */
+	(void) sigemptyset(&sa.sa_mask);
+	sa.sa_handler = sigchld;
+	sa.sa_flags = SA_RESTART;
+	if (sigaction(SIGCHLD, &sa, NULL) == -1)
+		err(1, "sigaction");
+	
+	/* put something in the output q */
+	if (write(s, "Hello world\n", 12) == -1)
+		err(1, "write");
+
+	/* ask for output to drain but don't drain it */
+	rc = 0;
+	if (tcsetattr(s, TCSADRAIN, &term) == -1) {
+		(void) printf("parent: tcsetattr: %s\n", strerror(errno));
+		rc = 1;
+	}
+
+	/* wait for last child */
+        sa.sa_handler = SIG_DFL;
+	if (sigaction(SIGCHLD, &sa, NULL) == -1)
+		err(1, "sigaction");
+	(void) wait(NULL);
+
+	exit(rc);
+	/* NOTREACHED */
+	exit(rc);
+	return 0;
+}