From 17d28fde42923741715df961b5986325c628b193 Mon Sep 17 00:00:00 2001
From: Roy Marples <roy@marples.name>
Date: Fri, 28 Mar 2008 16:04:48 +0000
Subject: Support XEN on NetBSD

---
 src/librc/librc.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)

diff --git a/src/librc/librc.c b/src/librc/librc.c
index 13220d2f..6d58bf82 100644
--- a/src/librc/librc.c
+++ b/src/librc/librc.c
@@ -214,6 +214,13 @@ const char *rc_sys(void)
 			return RC_SYS_JAIL;
 #endif
 
+#ifdef __NetBSD__
+	if (exists("/kern/xen/privcmd"))
+		return RC_SYS_XEN0;
+	if (exists("/kern/xen"))
+		return RC_SYS_XENU;
+#endif
+
 #ifdef __linux__
 	if (exists("/proc/xen")) {
 		if (file_regex("/proc/xen/capabilities", "control_d"))
@@ -673,6 +680,95 @@ bool rc_service_value_set(const char *service, const char *option,
 }
 librc_hidden_def(rc_service_value_set)
 
+static pid_t _exec_service(const char *service, const char *arg)
+{
+	char *file;
+	char fifo[PATH_MAX];
+	pid_t pid = -1;
+	sigset_t full;
+	sigset_t old;
+	struct sigaction sa;
+
+	file = rc_service_resolve(service);
+	if (! exists(file)) {
+		rc_service_mark(service, RC_SERVICE_STOPPED);
+		free(file);
+		return 0;
+	}
+
+	/* We create a fifo so that other services can wait until we complete */
+	snprintf(fifo, sizeof(fifo), RC_SVCDIR "/exclusive/%s",
+		 basename_c(service));
+	if (mkfifo(fifo, 0600) != 0 && errno != EEXIST) {
+		free(file);
+		return -1;
+	}
+
+	/* We need to block signals until we have forked */
+	memset(&sa, 0, sizeof (sa));
+	sa.sa_handler = SIG_DFL;
+	sigemptyset(&sa.sa_mask);
+	sigfillset(&full);
+	sigprocmask(SIG_SETMASK, &full, &old);
+
+	if ((pid = fork()) == 0) {
+		/* Restore default handlers */
+		sigaction(SIGCHLD, &sa, NULL);
+		sigaction(SIGHUP, &sa, NULL);
+		sigaction(SIGINT, &sa, NULL);
+		sigaction(SIGQUIT, &sa, NULL);
+		sigaction(SIGTERM, &sa, NULL);
+		sigaction(SIGUSR1, &sa, NULL);
+		sigaction(SIGWINCH, &sa, NULL);
+
+		/* Unmask signals */
+		sigprocmask(SIG_SETMASK, &old, NULL);
+
+		/* Safe to run now */
+		execl(file, file, arg, (char *) NULL);
+		fprintf(stderr, "unable to exec `%s': %s\n",
+			file, strerror(errno));
+		unlink(fifo);
+		_exit(EXIT_FAILURE);
+	}
+
+	if (pid == -1)
+		fprintf(stderr, "fork: %s\n",strerror (errno));
+
+	sigprocmask(SIG_SETMASK, &old, NULL);
+
+	free(file);
+
+	return pid;
+}
+
+pid_t rc_service_stop(const char *service)
+{
+	RC_SERVICE state = rc_service_state(service);
+
+	if (state & RC_SERVICE_FAILED)
+		return -1;
+
+	if (state & RC_SERVICE_STOPPED)
+		return 0;
+
+	return _exec_service(service, "stop");
+}
+librc_hidden_def(rc_service_stop)
+
+pid_t rc_service_start(const char *service)
+{
+	RC_SERVICE state = rc_service_state(service);
+
+	if (state & RC_SERVICE_FAILED)
+		return -1;
+
+	if (! state & RC_SERVICE_STOPPED)
+		return 0;
+
+	return _exec_service(service, "start");
+}
+librc_hidden_def(rc_service_start)
 
 bool rc_service_schedule_start(const char *service,
 			       const char *service_to_start)
-- 
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