1 files changed, 110 insertions, 0 deletions
diff --git a/usr.sbin/bsdinstall/runconsoles/common.h b/usr.sbin/bsdinstall/runconsoles/common.h
new file mode 100644
index 000000000000..5c3623f15cba
--- /dev/null
+++ b/usr.sbin/bsdinstall/runconsoles/common.h
@@ -0,0 +1,110 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2022 Jessica Clarke <jrtc27@FreeBSD.org>
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+#define	KILL_TIMEOUT	10
+
+/*
+ * NB: Most of these do not need to be volatile, but a handful are used in
+ * signal handler contexts, so for simplicity we make them all volatile rather
+ * than duplicate the implementation.
+ */
+struct pipe_barrier {
+	volatile int		fds[2];
+};
+
+static __inline int
+pipe_barrier_init(struct pipe_barrier *p)
+{
+	int error, fds[2], i;
+
+	error = pipe(fds);
+	if (error != 0)
+		return (error);
+
+	for (i = 0; i < 2; ++i)
+		p->fds[i] = fds[i];
+
+	return (0);
+}
+
+static __inline void
+pipe_barrier_wait(struct pipe_barrier *p)
+{
+	ssize_t ret;
+	char temp;
+	int fd;
+
+	fd = p->fds[0];
+	p->fds[0] = -1;
+	do {
+		ret = read(fd, &temp, 1);
+	} while (ret == -1 && errno == EINTR);
+	close(fd);
+}
+
+static __inline void
+pipe_barrier_ready(struct pipe_barrier *p)
+{
+	int fd;
+
+	fd = p->fds[1];
+	p->fds[1] = -1;
+	close(fd);
+}
+
+static __inline void
+pipe_barrier_destroy_impl(struct pipe_barrier *p, int i)
+{
+	int fd;
+
+	fd = p->fds[i];
+	if (fd != -1) {
+		p->fds[i] = -1;
+		close(fd);
+	}
+}
+
+static __inline void
+pipe_barrier_destroy_wait(struct pipe_barrier *p)
+{
+	pipe_barrier_destroy_impl(p, 0);
+}
+
+static __inline void
+pipe_barrier_destroy_ready(struct pipe_barrier *p)
+{
+	pipe_barrier_destroy_impl(p, 1);
+}
+
+static __inline void
+pipe_barrier_destroy(struct pipe_barrier *p)
+{
+	pipe_barrier_destroy_wait(p);
+	pipe_barrier_destroy_ready(p);
+}
+
+void	reproduce_signal_death(int sig);