openrc/src/rc/runscript.c

/*
 * runscript.c
 * Handle launching of init scripts.
 */

/*
 * Copyright 2007-2008 Roy Marples
 * All rights reserved

 * 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.
 */

#include <sys/select.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <dlfcn.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>

#ifdef __linux__
# include <pty.h>
#elif defined(__NetBSD__) || defined(__OpenBSD__)
# include <util.h>
#else
# include <libutil.h>
#endif

#include "builtins.h"
#include "einfo.h"
#include "rc.h"
#include "rc-misc.h"
#include "rc-plugin.h"
#include "strlist.h"

#define SELINUX_LIB     RC_LIBDIR "/runscript_selinux.so"

#define PREFIX_LOCK		RC_SVCDIR "/prefix.lock"

/* usecs to wait while we poll the fifo */
#define WAIT_INTERVAL	20000000

/* max secs to wait until a service comes up */
#define WAIT_MAX        300

#define ONE_SECOND      1000000000

static const char *applet = NULL;
static char **applet_list = NULL;
static char *service = NULL;
static char *exclusive = NULL;
static char *mtime_test = NULL;
static rc_depinfo_t *deptree = NULL;
static char **services = NULL;
static char **tmplist = NULL;
static char **providelist = NULL;
static char **restart_services = NULL;
static char **need_services = NULL;
static char **use_services = NULL;
static char **env = NULL;
static char *tmp = NULL;
static char *softlevel = NULL;
static bool sighup = false;
static char *ibsave = NULL;
static bool in_background = false;
static rc_hook_t hook_out = 0;
static pid_t service_pid = 0;
static char *prefix = NULL;
static bool prefix_locked = false;
static int signal_pipe[2] = { -1, -1 };
static int master_tty = -1;

extern char **environ;

static const char *const types_b[] = { "broken", NULL };
static const char *const types_n[] = { "ineed", NULL };
static const char *const types_nu[] = { "ineed", "iuse", NULL };
static const char *const types_nua[] = { "ineed", "iuse", "iafter", NULL };

static const char *const types_m[] = { "needsme", NULL };
static const char *const types_mua[] = { "needsme", "usesme", "beforeme", NULL };

#ifdef __linux__
static void (*selinux_run_init_old) (void);
static void (*selinux_run_init_new) (int argc, char **argv);

static void setup_selinux (int argc, char **argv);

static void setup_selinux (int argc, char **argv)
{
	void *lib_handle = NULL;

	if (! exists (SELINUX_LIB))
		return;

	lib_handle = dlopen (SELINUX_LIB, RTLD_NOW | RTLD_GLOBAL);
	if (! lib_handle) {
		eerror ("dlopen: %s", dlerror ());
		return;
	}

	selinux_run_init_old = (void (*)(void))
		dlfunc (lib_handle, "selinux_runscript");
	selinux_run_init_new = (void (*)(int, char **))
		dlfunc (lib_handle, "selinux_runscript2");

	/* Use new run_init if it exists, else fall back to old */
	if (selinux_run_init_new)
		selinux_run_init_new (argc, argv);
	else if (selinux_run_init_old)
		selinux_run_init_old ();
	else
		/* This shouldnt happen... probably corrupt lib */
		eerrorx ("run_init is missing from runscript_selinux.so!");

	dlclose (lib_handle);
}
#endif

static void handle_signal (int sig)
{
	int serrno = errno;
	char signame[10] = { '\0' };
	struct winsize ws;

	switch (sig) {
		case SIGHUP:
			sighup = true;
			break;

		case SIGCHLD:
			if (signal_pipe[1] > -1) {
				if (write (signal_pipe[1], &sig, sizeof (sig)) == -1)
					eerror ("%s: send: %s", service, strerror (errno));
			} else
				rc_waitpid (-1);
			break;

		case SIGWINCH:
			if (master_tty >= 0) {
				ioctl (fileno (stdout), TIOCGWINSZ, &ws);
				ioctl (master_tty, TIOCSWINSZ, &ws);
			}
			break;

		case SIGINT:
			if (! signame[0])
				snprintf (signame, sizeof (signame), "SIGINT");
			/* FALLTHROUGH */
		case SIGTERM:
			if (! signame[0])
				snprintf (signame, sizeof (signame), "SIGTERM");
			/* FALLTHROUGH */
		case SIGQUIT:
			if (! signame[0])
				snprintf (signame, sizeof (signame), "SIGQUIT");
			/* Send the signal to our children too */
			if (service_pid > 0)
				kill (service_pid, sig);
			eerrorx ("%s: caught %s, aborting", applet, signame);
			/* NOTREACHED */

		default:
			eerror ("%s: caught unknown signal %d", applet, sig);
	}

	/* Restore errno */
	errno = serrno;
}

static time_t get_mtime (const char *pathname, bool follow_link)
{
	struct stat buf;
	int retval;

	if (! pathname)
		return (0);

	retval = follow_link ? stat (pathname, &buf) : lstat (pathname, &buf);
	if (! retval)
		return (buf.st_mtime);

	errno = 0;
	return (0);
}

static bool in_control ()
{
	char *path;
	time_t mtime;
	const char *tests[] = { "starting", "started", "stopping",
		"inactive", "wasinactive", NULL };
	int i = 0;

	if (sighup)
		return (false);

	if (! mtime_test || ! exists (mtime_test))
		return (false);

	if (rc_service_state (applet) & RC_SERVICE_STOPPED)
		return (false);

	if (! (mtime = get_mtime (mtime_test, false)))
		return (false);

	while (tests[i]) {
		path = rc_strcatpaths (RC_SVCDIR, tests[i], applet, (char *) NULL);
		if (exists (path)) {
			time_t m = get_mtime (path, false);
			if (mtime < m && m != 0) {
				free (path);
				return (false);
			}
		}
		free (path);
		i++;
	}

	return (true);
}

static void uncoldplug ()
{
	char *cold = rc_strcatpaths (RC_SVCDIR, "coldplugged", applet, (char *) NULL);
	if (exists (cold) && unlink (cold) != 0)
		eerror ("%s: unlink `%s': %s", applet, cold, strerror (errno));
	free (cold);
}

static void start_services (char **list) {
	char *svc;
	int i;
	rc_service_state_t state = rc_service_state (service);

	if (! list)
		return;

	if (state & RC_SERVICE_INACTIVE ||
	    state & RC_SERVICE_WASINACTIVE ||
	    state & RC_SERVICE_STARTING ||
	    state & RC_SERVICE_STARTED)
	{
		STRLIST_FOREACH (list, svc, i) {
			if (rc_service_state (svc) & RC_SERVICE_STOPPED) {
				if (state & RC_SERVICE_INACTIVE ||
				    state & RC_SERVICE_WASINACTIVE)
				{
					rc_service_schedule_start (service, svc);
					ewarn ("WARNING: %s is scheduled to started when %s has started",
					       svc, applet);
				} else
					rc_service_start (svc);
			}
		}
	}
}

static void restore_state (void)
{
	rc_service_state_t state;

	if (rc_in_plugin || ! in_control ())
		return;

	state = rc_service_state (applet);
	if (state & RC_SERVICE_STOPPING) {

		if (state & RC_SERVICE_WASINACTIVE)
			rc_service_mark (applet, RC_SERVICE_INACTIVE);
		else
			rc_service_mark (applet, RC_SERVICE_STARTED);
		if (rc_runlevel_stopping ())
			rc_service_mark (applet, RC_SERVICE_FAILED);
	} else if (state & RC_SERVICE_STARTING) {
		if (state & RC_SERVICE_WASINACTIVE)
			rc_service_mark (applet, RC_SERVICE_INACTIVE);
		else
			rc_service_mark (applet, RC_SERVICE_STOPPED);
		if (rc_runlevel_starting ())
			rc_service_mark (applet, RC_SERVICE_FAILED);
	}

	if (exclusive)
		unlink (exclusive);
	free (exclusive);
	exclusive = NULL;
}

static void cleanup (void)
{
	restore_state ();

	if (! rc_in_plugin) {
		if (prefix_locked)
			unlink (PREFIX_LOCK);
		if (hook_out) {
			rc_plugin_run (hook_out, applet);
			if (hook_out == RC_HOOK_SERVICE_START_DONE)
				rc_plugin_run (RC_HOOK_SERVICE_START_OUT, applet);
			else if (hook_out == RC_HOOK_SERVICE_STOP_DONE)
				rc_plugin_run (RC_HOOK_SERVICE_STOP_OUT, applet);
		}

		if (restart_services)
			start_services (restart_services);
	}

	rc_plugin_unload ();
	rc_deptree_free (deptree);
	rc_strlist_free (services);
	rc_strlist_free (providelist);
	rc_strlist_free (need_services);
	rc_strlist_free (use_services);
	rc_strlist_free (restart_services);
	rc_strlist_free (applet_list);
	rc_strlist_free (tmplist);
	free (ibsave);

	rc_strlist_free (env);

	if (mtime_test)
	{
		if (! rc_in_plugin)
			unlink (mtime_test);
		free (mtime_test);
	}
	free (exclusive);
	free (service);
	free (prefix);
	free (softlevel);
}

static int write_prefix (const char *buffer, size_t bytes, bool *prefixed) {
	unsigned int i;
	const char *ec = ecolor (ECOLOR_HILITE);
	const char *ec_normal = ecolor (ECOLOR_NORMAL);
	ssize_t ret = 0;
	int fd = fileno (stdout);

	for (i = 0; i < bytes; i++) {
		/* We don't prefix escape codes, like eend */
		if (buffer[i] == '\033')
			*prefixed = true;

		if (! *prefixed) {
			ret += write (fd, ec, strlen (ec));
			ret += write (fd, prefix, strlen (prefix));
			ret += write (fd, ec_normal, strlen (ec_normal));
			ret += write (fd, "|", 1);
			*prefixed = true;
		}

		if (buffer[i] == '\n')
			*prefixed = false;
		ret += write (fd, buffer + i, 1);
	}

	return (ret);
}

static bool svc_exec (const char *arg1, const char *arg2)
{
	bool execok;
	int fdout = fileno (stdout);
	struct termios tt;
	struct winsize ws;
	int i;
	int flags = 0;
	fd_set rset;
	int s;
	char *buffer;
	size_t bytes;
	bool prefixed = false;
	int selfd;
	int slave_tty;

	/* Setup our signal pipe */
	if (pipe (signal_pipe) == -1)
		eerrorx ("%s: pipe: %s", service, applet);
	for (i = 0; i < 2; i++)
		if ((flags = fcntl (signal_pipe[i], F_GETFD, 0) == -1 ||
		     fcntl (signal_pipe[i], F_SETFD, flags | FD_CLOEXEC) == -1))
			eerrorx ("%s: fcntl: %s", service, strerror (errno));

	/* Open a pty for our prefixed output
	 * We do this instead of mapping pipes to stdout, stderr so that
	 * programs can tell if they're attached to a tty or not.
	 * The only loss is that we can no longer tell the difference
	 * between the childs stdout or stderr */
	master_tty = slave_tty = -1;
	if (prefix && isatty (fdout)) {
		tcgetattr (fdout, &tt);
		ioctl (fdout, TIOCGWINSZ, &ws);

		/* If the below call fails due to not enough ptys then we don't
		 * prefix the output, but we still work */
		openpty (&master_tty, &slave_tty, NULL, &tt, &ws);

		if (master_tty >= 0 &&
		    (flags = fcntl (master_tty, F_GETFD, 0)) == 0)
		     fcntl (master_tty, F_SETFD, flags | FD_CLOEXEC);

		if (slave_tty >=0 &&
		    (flags = fcntl (slave_tty, F_GETFD, 0)) == 0)
		     fcntl (slave_tty, F_SETFD, flags | FD_CLOEXEC);
	}

	service_pid = fork();
	if (service_pid == -1)
		eerrorx ("%s: fork: %s", service, strerror (errno));
	if (service_pid == 0) {
		if (slave_tty >= 0) {
			dup2 (slave_tty, 1);
			dup2 (slave_tty, 2);
		}

		if (exists (RC_SVCDIR "/runscript.sh")) {
			execl (RC_SVCDIR "/runscript.sh", RC_SVCDIR "/runscript.sh",
			       service, arg1, arg2, (char *) NULL);
			eerror ("%s: exec `" RC_SVCDIR "/runscript.sh': %s",
				service, strerror (errno));
			_exit (EXIT_FAILURE);
		} else {
			execl (RC_LIBDIR "/sh/runscript.sh", RC_LIBDIR "/sh/runscript.sh",
			       service, arg1, arg2, (char *) NULL);
			eerror ("%s: exec `" RC_LIBDIR "/sh/runscript.sh': %s",
				service, strerror (errno));
			_exit (EXIT_FAILURE);
		}
	}

	selfd = MAX (master_tty, signal_pipe[0]) + 1;
	buffer = xmalloc (sizeof (char) * BUFSIZ);
	for (;;) {
		FD_ZERO (&rset);
		FD_SET (signal_pipe[0], &rset);
		if (master_tty >= 0)
			FD_SET (master_tty, &rset);

		if ((s = select (selfd, &rset, NULL, NULL, NULL)) == -1) {
			if (errno != EINTR) {
				eerror ("%s: select: %s", service, strerror (errno));
				break;
			}
		}

		if (s > 0) {
			if (master_tty >= 0 && FD_ISSET (master_tty, &rset)) {
				bytes = read (master_tty, buffer, BUFSIZ);
				write_prefix (buffer, bytes, &prefixed);
			}

			/* Only SIGCHLD signals come down this pipe */
			if (FD_ISSET (signal_pipe[0], &rset))
				break;
		}
	}

	free (buffer);
	close (signal_pipe[0]);
	close (signal_pipe[1]);
	signal_pipe[0] = signal_pipe[1] = -1;

	if (master_tty >= 0) {
		/* Why did we do this? */
		/* signal (SIGWINCH, SIG_IGN); */
		close (master_tty);
		master_tty = -1;
	}

	execok = rc_waitpid (service_pid) == 0 ? true : false;
	service_pid = 0;

	return (execok);
}

static bool svc_wait (rc_depinfo_t *depinfo, const char *svc)
{
	char *s;
	char *fifo;
	struct timespec ts;
	int nloops = WAIT_MAX * (ONE_SECOND / WAIT_INTERVAL);
	bool retval = false;
	bool forever = false;
	char **keywords = NULL;
	int i;

	if (! service)
		return (false);

	/* Some services don't have a timeout, like fsck */
	keywords = rc_deptree_depend (depinfo, svc, "keyword");
	STRLIST_FOREACH (keywords, s, i) {
		if (strcmp (s, "notimeout") == 0) {
			forever = true;
			break;
		}
	}
	rc_strlist_free (keywords);

	fifo = rc_strcatpaths (RC_SVCDIR, "exclusive", basename_c (svc), (char *) NULL);
	ts.tv_sec = 0;
	ts.tv_nsec = WAIT_INTERVAL;

	while (nloops) {
		if (! exists (fifo)) {
			retval = true;
			break;
		}

		if (nanosleep (&ts, NULL) == -1) {
			if (errno != EINTR)
				break;
		}

		if (! forever)
			nloops --;
	}

	if (! exists (fifo))
		retval = true;
	free (fifo);
	return (retval);
}

static rc_service_state_t svc_status ()
{
	char status[10];
	int (*e) (const char *fmt, ...) = &einfo;

	rc_service_state_t state = rc_service_state (service);

	if (state & RC_SERVICE_STOPPING) {
		snprintf (status, sizeof (status), "stopping");
		e = &ewarn;
	} else if (state & RC_SERVICE_STARTING) {
		snprintf (status, sizeof (status), "starting");
		e = &ewarn;
	} else if (state & RC_SERVICE_INACTIVE) {
		snprintf (status, sizeof (status), "inactive");
		e = &ewarn;
	} else if (state & RC_SERVICE_STARTED) {
		if (geteuid () == 0 && rc_service_daemons_crashed (service)) {
			snprintf (status, sizeof (status), "crashed");
			e = &eerror;
		} else
			snprintf (status, sizeof (status), "started");
	} else
		snprintf (status, sizeof (status), "stopped");

	e ("status: %s", status);
	return (state);
}

static void make_exclusive ()
{
	char *path;
	size_t l;

	/* We create a fifo so that other services can wait until we complete */
	if (! exclusive)
		exclusive = rc_strcatpaths (RC_SVCDIR, "exclusive", applet, (char *) NULL);

	if (mkfifo (exclusive, 0600) != 0 && errno != EEXIST &&
	    (errno != EACCES || geteuid () == 0))
		eerrorx ("%s: unable to create fifo `%s': %s",
			 applet, exclusive, strerror (errno));

	path = rc_strcatpaths (RC_SVCDIR, "exclusive", applet, (char *) NULL);
	l = strlen (path) + 16;
	mtime_test = xmalloc (sizeof (char) * l);
	snprintf (mtime_test, l, "%s.%d", path, getpid ());
	free (path);

	if (exists (mtime_test) && unlink (mtime_test) != 0) {
		eerror ("%s: unlink `%s': %s",
			applet, mtime_test, strerror (errno));
		free (mtime_test);
		mtime_test = NULL;
		return;
	}

	if (symlink (service, mtime_test) != 0) {
		eerror ("%s: symlink `%s' to `%s': %s",
			applet, service, mtime_test, strerror (errno));
		free (mtime_test);
		mtime_test = NULL;
	}
}

static void unlink_mtime_test ()
{
	if (unlink (mtime_test) != 0)
		eerror ("%s: unlink `%s': %s", applet, mtime_test, strerror (errno));
	free (mtime_test);
	mtime_test = NULL;
}

static void get_started_services ()
{
	rc_strlist_free (tmplist);
	tmplist = rc_services_in_state (RC_SERVICE_INACTIVE);
	rc_strlist_free (restart_services);
	restart_services = rc_services_in_state (RC_SERVICE_STARTED);
	rc_strlist_join (&restart_services, tmplist);
	rc_strlist_free (tmplist);
	tmplist = NULL;
}

static void svc_start (bool deps)
{
	bool started;
	bool background = false;
	char *svc;
	char *svc2;
	int i;
	int j;
	int depoptions = RC_DEP_TRACE;
	rc_service_state_t state;

	state = rc_service_state (service);

	if (rc_yesno (getenv ("IN_HOTPLUG")) || in_background) {
		if (! state & RC_SERVICE_INACTIVE &&
		    ! state & RC_SERVICE_STOPPED)
			exit (EXIT_FAILURE);
		background = true;
	}

	if (state & RC_SERVICE_STARTED) {
		ewarn ("WARNING: %s has already been started", applet);
		return;
	} else if (state & RC_SERVICE_STARTING)
		ewarnx ("WARNING: %s is already starting", applet);
	else if (state & RC_SERVICE_STOPPING)
		ewarnx ("WARNING: %s is stopping", applet);
	else if (state & RC_SERVICE_INACTIVE && ! background)
		ewarnx ("WARNING: %s has already started, but is inactive", applet);

	if (! rc_service_mark (service, RC_SERVICE_STARTING))
		eerrorx ("ERROR: %s has been started by something else", applet);

	make_exclusive (service);

	hook_out = RC_HOOK_SERVICE_START_OUT;
	rc_plugin_run (RC_HOOK_SERVICE_START_IN, applet);

	if (rc_conf_yesno ("rc_depend_strict"))
		depoptions |= RC_DEP_STRICT;

	if (deps) {
		if (! deptree && ((deptree = _rc_deptree_load (NULL)) == NULL))
			eerrorx ("failed to load deptree");

		rc_strlist_free (services);
		services = rc_deptree_depends (deptree, types_b,
					       (const char * const *) applet_list,
					       softlevel, 0);
		if (services) {
			eerrorn ("ERROR: `%s' needs ", applet);
			STRLIST_FOREACH (services, svc, i) {
				if (i > 0)
					fprintf (stderr, ", ");
				fprintf (stderr, "%s", svc);
			}
			exit (EXIT_FAILURE);
		}
		rc_strlist_free (services);
		services = NULL;

		rc_strlist_free (need_services);
		need_services = rc_deptree_depends (deptree, types_n,
						    (const char * const *) applet_list,
						    softlevel, depoptions);

		rc_strlist_free (use_services);
		use_services = rc_deptree_depends (deptree, types_nu,
						   (const char * const *) applet_list,
						   softlevel, depoptions);

		if (! rc_runlevel_starting ()) {
			STRLIST_FOREACH (use_services, svc, i)
				if (rc_service_state (svc) & RC_SERVICE_STOPPED) {
					pid_t pid = rc_service_start (svc);
					if (! rc_conf_yesno ("rc_parallel"))
						rc_waitpid (pid);
				}
		}

		/* Now wait for them to start */
		services = rc_deptree_depends (deptree, types_nua,
					       (const char * const *) applet_list,
					       softlevel, depoptions);

		/* We use tmplist to hold our scheduled by list */
		rc_strlist_free (tmplist);
		tmplist = NULL;

		STRLIST_FOREACH (services, svc, i) {
			rc_service_state_t svcs = rc_service_state (svc);
			if (svcs & RC_SERVICE_STARTED)
				continue;

			/* Don't wait for services which went inactive but are now in
			 * starting state which we are after */
			if (svcs & RC_SERVICE_STARTING &&
			    svcs & RC_SERVICE_WASINACTIVE) {
				bool use = false;
				STRLIST_FOREACH (use_services, svc2, j)
					if (strcmp (svc, svc2) == 0) {
						use = true;
						break;
					}
				if (! use)
					continue;
			}

			if (! svc_wait (deptree, svc))
				eerror ("%s: timed out waiting for %s", applet, svc);
			if ((svcs = rc_service_state (svc)) & RC_SERVICE_STARTED)
				continue;

			STRLIST_FOREACH (need_services, svc2, j)
				if (strcmp (svc, svc2) == 0) {
					if (svcs & RC_SERVICE_INACTIVE ||
					    svcs & RC_SERVICE_WASINACTIVE)
						rc_strlist_add (&tmplist, svc);
					else
						eerrorx ("ERROR: cannot start %s as %s would not start",
							 applet, svc);
				}
		}

		if (tmplist) {
			int n = 0;
			size_t len = 0;
			char *p;

			/* Set the state now, then unlink our exclusive so that
			   our scheduled list is preserved */
			rc_service_mark (service, RC_SERVICE_STOPPED);
			unlink_mtime_test ();

			STRLIST_FOREACH (tmplist, svc, i) {
				rc_service_schedule_start (svc, service);
				rc_strlist_free (providelist);
				providelist = rc_deptree_depend (deptree, "iprovide", svc);
				STRLIST_FOREACH (providelist, svc2, j)
					rc_service_schedule_start (svc2, service);

				len += strlen (svc) + 2;
				n++;
			}

			len += 5;
			tmp = xmalloc (sizeof (char) * len);
			p = tmp;
			STRLIST_FOREACH (tmplist, svc, i) {
				if (i > 1) {
					if (i == n)
						p += snprintf (p, len, " or ");
					else
						p += snprintf (p, len, ", ");
				}
				p += snprintf (p, len, "%s", svc);
			}
			ewarnx ("WARNING: %s is scheduled to start when %s has started",
				applet, tmp);
		}

		rc_strlist_free (services);
		services = NULL;
	}

	if (ibsave)
		setenv ("IN_BACKGROUND", ibsave, 1);
	hook_out = RC_HOOK_SERVICE_START_DONE;
	rc_plugin_run (RC_HOOK_SERVICE_START_NOW, applet);
	started = svc_exec ("start", NULL);
	if (ibsave)
		unsetenv ("IN_BACKGROUND");

	if (in_control ()) {
		if (! started)
			eerrorx ("ERROR: %s failed to start", applet);
	} else {
		if (rc_service_state (service) & RC_SERVICE_INACTIVE)
			ewarnx ("WARNING: %s has started, but is inactive", applet);
		else
			ewarnx ("WARNING: %s not under our control, aborting", applet);
	}

	rc_service_mark (service, RC_SERVICE_STARTED);
	unlink_mtime_test ();
	hook_out = RC_HOOK_SERVICE_START_OUT;
	rc_plugin_run (RC_HOOK_SERVICE_START_DONE, applet);

	if (exclusive)
		unlink (exclusive);

	/* Now start any scheduled services */
	rc_strlist_free (services);
	services = rc_services_scheduled (service);
	STRLIST_FOREACH (services, svc, i)
		if (rc_service_state (svc) & RC_SERVICE_STOPPED)
			rc_service_start (svc);
	rc_strlist_free (services);
	services = NULL;

	/* Do the same for any services we provide */
	rc_strlist_free (tmplist);
	tmplist = rc_deptree_depend (deptree, "iprovide", applet);

	STRLIST_FOREACH (tmplist, svc2, j) {
		rc_strlist_free (services);
		services = rc_services_scheduled (svc2);
		STRLIST_FOREACH (services, svc, i)
			if (rc_service_state (svc) & RC_SERVICE_STOPPED)
				rc_service_start (svc);
	}

	hook_out = 0;
	rc_plugin_run (RC_HOOK_SERVICE_START_OUT, applet);
}

static void svc_stop (bool deps)
{
	bool stopped;
	rc_service_state_t state = rc_service_state (service);

	if (rc_runlevel_stopping () &&
	    state & RC_SERVICE_FAILED)
		exit (EXIT_FAILURE);

	if (rc_yesno (getenv ("IN_HOTPLUG")) || in_background)
		if (! (state & RC_SERVICE_STARTED) &&
		    ! (state & RC_SERVICE_INACTIVE))
			exit (EXIT_FAILURE);

	if (state & RC_SERVICE_STOPPED) {
		ewarn ("WARNING: %s is already stopped", applet);
		return;
	} else if (state & RC_SERVICE_STOPPING)
		ewarnx ("WARNING: %s is already stopping", applet);

	if (! rc_service_mark (service, RC_SERVICE_STOPPING))
		eerrorx ("ERROR: %s has been stopped by something else", applet);

	make_exclusive (service);

	hook_out = RC_HOOK_SERVICE_STOP_OUT;
	rc_plugin_run (RC_HOOK_SERVICE_STOP_IN, applet);

	if (! rc_runlevel_stopping () &&
	    rc_service_in_runlevel (service, RC_LEVEL_BOOT))
		ewarn ("WARNING: you are stopping a boot service");

	if (deps && ! (state & RC_SERVICE_WASINACTIVE)) {
		int depoptions = RC_DEP_TRACE;
		char *svc;
		int i;

		if (rc_conf_yesno ("rc_depend_strict"))
			depoptions |= RC_DEP_STRICT;

		if (! deptree && ((deptree = _rc_deptree_load (NULL)) == NULL))
			eerrorx ("failed to load deptree");

		rc_strlist_free (tmplist);
		tmplist = NULL;
		rc_strlist_free (services);
		services = rc_deptree_depends (deptree, types_m,
					       (const char * const *) applet_list,
					       softlevel, depoptions);
		rc_strlist_reverse (services);
		STRLIST_FOREACH (services, svc, i) {
			rc_service_state_t svcs = rc_service_state (svc);
			if (svcs & RC_SERVICE_STARTED ||
			    svcs & RC_SERVICE_INACTIVE)
			{
				svc_wait (deptree, svc);
				svcs = rc_service_state (svc);
				if (svcs & RC_SERVICE_STARTED ||
				    svcs & RC_SERVICE_INACTIVE)
				{
					pid_t pid = rc_service_stop (svc);
					if (! rc_conf_yesno ("rc_parallel"))
						rc_waitpid (pid);
					rc_strlist_add (&tmplist, svc);
				}
			}
		}
		rc_strlist_free (services);
		services = NULL;

		STRLIST_FOREACH (tmplist, svc, i) {
			if (rc_service_state (svc) & RC_SERVICE_STOPPED)
				continue;

			/* We used to loop 3 times here - maybe re-do this if needed */
			svc_wait (deptree, svc);
			if (! (rc_service_state (svc) & RC_SERVICE_STOPPED)) {
				if (rc_runlevel_stopping ()) {
					/* If shutting down, we should stop even if a dependant failed */
					if (softlevel &&
					    (strcmp (softlevel, RC_LEVEL_SHUTDOWN) == 0 ||
					     strcmp (softlevel, RC_LEVEL_REBOOT) == 0 ||
					     strcmp (softlevel, RC_LEVEL_SINGLE) == 0))
						continue;
					rc_service_mark (service, RC_SERVICE_FAILED);
				}

				eerrorx ("ERROR:  cannot stop %s as %s is still up",
					 applet, svc);
			}
		}
		rc_strlist_free (tmplist);
		tmplist = NULL;

		/* We now wait for other services that may use us and are stopping
		   This is important when a runlevel stops */
		services = rc_deptree_depends (deptree, types_mua,
					       (const char * const *) applet_list,
					       softlevel, depoptions);
		STRLIST_FOREACH (services, svc, i) {
			if (rc_service_state (svc) & RC_SERVICE_STOPPED)
				continue;
			svc_wait (deptree, svc);
		}

		rc_strlist_free (services);
		services = NULL;
	}

	if (ibsave)
		setenv ("IN_BACKGROUND", ibsave, 1);
	hook_out = RC_HOOK_SERVICE_STOP_DONE;
	rc_plugin_run (RC_HOOK_SERVICE_STOP_NOW, applet);
	stopped = svc_exec ("stop", NULL);
	if (ibsave)
		unsetenv ("IN_BACKGROUND");

	if (! in_control ())
		ewarnx ("WARNING: %s not under our control, aborting", applet);

	if (! stopped)
		eerrorx ("ERROR: %s failed to stop", applet);

	if (in_background)
		rc_service_mark (service, RC_SERVICE_INACTIVE);
	else
		rc_service_mark (service, RC_SERVICE_STOPPED);

	unlink_mtime_test ();
	hook_out = RC_HOOK_SERVICE_STOP_OUT;
	rc_plugin_run (RC_HOOK_SERVICE_STOP_DONE, applet);
	if (exclusive)
		unlink (exclusive);
	hook_out = 0;
	rc_plugin_run (RC_HOOK_SERVICE_STOP_OUT, applet);
}

static void svc_restart (bool deps)
{
	/* This is hairly and a better way needs to be found I think!
	   The issue is this - openvpn need net and dns. net can restart
	   dns via resolvconf, so you could have openvpn trying to restart dnsmasq
	   which in turn is waiting on net which in turn is waiting on dnsmasq.
	   The work around is for resolvconf to restart it's services with --nodeps
	   which means just that. The downside is that there is a small window when
	   our status is invalid.
	   One workaround would be to introduce a new status, or status locking. */
	if (! deps) {
		rc_service_state_t state = rc_service_state (service);
		if (state & RC_SERVICE_STARTED || state & RC_SERVICE_INACTIVE)
			svc_exec ("stop", "start");
		else
			svc_exec ("start", NULL);
		return;
	}

	if (! (rc_service_state (service) & RC_SERVICE_STOPPED)) {
		get_started_services ();
		svc_stop (deps);
	}

	svc_start (deps);
	start_services (restart_services);
	rc_strlist_free (restart_services);
	restart_services = NULL;
}

#include "_usage.h"
#define getoptstring "dDsv" getoptstring_COMMON
#define extraopts "stop | start | restart | describe | zap"
static const struct option longopts[] = {
	{ "debug",      0, NULL, 'd'},
	{ "ifstarted",  0, NULL, 's'},
	{ "nodeps",     0, NULL, 'D'},
	longopts_COMMON
};
static const char * const longopts_help[] = {
	"set xtrace when running the script",
	"only run commands when started",
	"ignore dependencies",
	longopts_help_COMMON
};
#include "_usage.c"

int runscript (int argc, char **argv)
{
	size_t i;
	bool deps = true;
	bool doneone = false;
	char pid[16];
	int retval;
	int opt;
	char *svc;

	/* Show help if insufficient args */
	if (argc < 2 || ! exists (argv[1])) {
		fprintf (stderr, "runscript is not meant to be to run directly\n");
		exit (EXIT_FAILURE);
	}

	applet = basename_c (argv[1]);
	if (argc < 3)
		usage (EXIT_FAILURE);

	if (*argv[1] == '/')
		service = xstrdup (argv[1]);
	else {
		char d[PATH_MAX];
		getcwd (d, sizeof (d));
		i = strlen (d) + strlen (argv[1]) + 2;
		service = xmalloc (sizeof (char) * i);
		snprintf (service, i, "%s/%s", d, argv[1]);
	}

	atexit (cleanup);

	/* Change dir to / to ensure all init scripts don't use stuff in pwd */
	chdir ("/");

#ifdef __linux__
	/* coldplug events can trigger init scripts, but we don't want to run them
	   until after rc sysinit has completed so we punt them to the boot runlevel */
	if (exists ("/dev/.rcsysinit")) {
		eerror ("%s: cannot run until sysvinit completes", applet);
		if (mkdir ("/dev/.rcboot", 0755) != 0 && errno != EEXIST)
			eerrorx ("%s: mkdir `/dev/.rcboot': %s", applet, strerror (errno));
		tmp = rc_strcatpaths ("/dev/.rcboot", applet, (char *) NULL);
		symlink (service, tmp);
		exit (EXIT_FAILURE);
	}
#endif

	if ((softlevel = xstrdup (getenv ("RC_SOFTLEVEL"))) == NULL) {
		/* Ensure our environment is pure
		   Also, add our configuration to it */
		char *p;
		env = env_filter ();

		if (env) {

#ifdef __linux__
			/* clearenv isn't portable, but there's no harm in using it
			   if we have it */
			clearenv ();
#else
			char *var;
			/* No clearenv present here then.
			   We could manipulate environ directly ourselves, but it seems that
			   some kernels bitch about this according to the environ man pages
			   so we walk though environ and call unsetenv for each value. */
			while (environ[0]) {
				tmp = xstrdup (environ[0]);
				p = tmp;
				var = strsep (&p, "=");
				unsetenv (var);
				free (tmp);
			}
			tmp = NULL;
#endif
		}

		tmplist = env_config ();
		rc_strlist_join (&env, tmplist);
		rc_strlist_free (tmplist);
		tmplist = NULL;
		STRLIST_FOREACH (env, p, i)
			putenv (p);
		/* We don't free our list as that would be null in environ */

		softlevel = rc_runlevel_get ();
	}

	setenv ("EINFO_LOG", service, 1);
	setenv ("SVCNAME", applet, 1);

	/* Set an env var so that we always know our pid regardless of any
	   subshells the init script may create so that our mark_service_*
	   functions can always instruct us of this change */
	snprintf (pid, sizeof (pid), "%d", (int) getpid ());
	setenv ("RC_RUNSCRIPT_PID", pid, 1);

	/* eprefix is kinda klunky, but it works for our purposes */
	if (rc_conf_yesno ("rc_parallel")) {
		size_t l = 0;
		size_t ll;

		/* Get the longest service name */
		services = rc_services_in_runlevel (NULL);
		STRLIST_FOREACH (services, svc, i) {
			ll = strlen (svc);
			if (ll > l)
				l = ll;
		}

		/* Make our prefix string */
		prefix = xmalloc (sizeof (char) * l + 1);
		ll = strlen (applet);
		memcpy (prefix, applet, ll);
		memset (prefix + ll, ' ', l - ll);
		memset (prefix + l, 0, 1);
		eprefix (prefix);
	}

#ifdef __linux__
	/* Ok, we are ready to go, so setup selinux if applicable */
	setup_selinux (argc, argv);
#endif

	/* Punt the first arg as it's our service name */
	argc--;
	argv++;

	/* Right then, parse any options there may be */
	while ((opt = getopt_long (argc, argv, getoptstring,
				   longopts, (int *) 0)) != -1)
		switch (opt) {
			case 'd':
				setenv ("RC_DEBUG", "yes", 1);
				break;
			case 's':
				if (! (rc_service_state (service) & RC_SERVICE_STARTED))
					exit (EXIT_FAILURE);
				break;
			case 'D':
				deps = false;
				break;
				case_RC_COMMON_GETOPT
		}

	/* Save the IN_BACKGROUND env flag so it's ONLY passed to the service
	   that is being called and not any dependents */
	if (getenv ("IN_BACKGROUND")) {
		ibsave = xstrdup (getenv ("IN_BACKGROUND"));
		in_background = rc_yesno (ibsave);
		unsetenv ("IN_BACKGROUND");
	}

	if (rc_yesno (getenv ("IN_HOTPLUG"))) {
		if (! rc_conf_yesno ("rc_hotplug") || ! service_plugable (applet))
			eerrorx ("%s: not allowed to be hotplugged", applet);
	}

	/* Setup a signal handler */
	signal_setup (SIGHUP, handle_signal);
	signal_setup (SIGINT, handle_signal);
	signal_setup (SIGQUIT, handle_signal);
	signal_setup (SIGTERM, handle_signal);
	signal_setup (SIGCHLD, handle_signal);

	/* Load our plugins */
	rc_plugin_load ();

	/* Now run each option */
	retval = EXIT_SUCCESS;
	while (optind < argc) {
		optarg = argv[optind++];

		/* Abort on a sighup here */
		if (sighup)
			exit (EXIT_FAILURE);

		if (strcmp (optarg, "status") != 0 &&
		    strcmp (optarg, "help") != 0) {
			/* Only root should be able to run us */
		}

		/* Export the command we're running.
		   This is important as we stamp on the restart function now but
		   some start/stop routines still need to behave differently if
		   restarting. */
		unsetenv ("RC_CMD");
		setenv ("RC_CMD", optarg, 1);

		doneone = true;
		rc_strlist_add (&applet_list, applet);

		if (strcmp (optarg, "describe") == 0 ||
		    strcmp (optarg, "help") == 0)
		{
			char *save = prefix;

			eprefix (NULL);
			prefix = NULL;
			svc_exec (optarg, NULL);
			eprefix (save);
		} else if (strcmp (optarg, "ineed") == 0 ||
			   strcmp (optarg, "iuse") == 0 ||
			   strcmp (optarg, "needsme") == 0 ||
			   strcmp (optarg, "usesme") == 0 ||
			   strcmp (optarg, "iafter") == 0 ||
			   strcmp (optarg, "ibefore") == 0 ||
			   strcmp (optarg, "iprovide") == 0)
		{
			int depoptions = RC_DEP_TRACE;

			if (rc_conf_yesno ("rc_depend_strict"))
				depoptions |= RC_DEP_STRICT;

			if (! deptree && ((deptree = _rc_deptree_load (NULL)) == NULL))
				eerrorx ("failed to load deptree");

			rc_strlist_free (services);
			rc_strlist_free (tmplist);
			rc_strlist_add (&tmplist, optarg);
			services = rc_deptree_depends (deptree,
						       (const char * const *) tmplist,
						       (const char * const *) applet_list,
						       softlevel, depoptions);
			STRLIST_FOREACH (services, svc, i)
				printf ("%s%s", i == 1 ? "" : " ", svc);
			if (services)
				printf ("\n");
		} else if (strcmp (optarg, "status") == 0) {
			rc_service_state_t r = svc_status (service);
			retval = (int) r;
			if (retval & RC_SERVICE_STARTED)
				retval = 0;
		} else {
#ifndef PREFIX
			if (geteuid () != 0)
				eerrorx ("%s: root access required", applet);
#endif

			if (strcmp (optarg, "conditionalrestart") == 0 ||
			    strcmp (optarg, "condrestart") == 0)
			{
				if (rc_service_state (service) & RC_SERVICE_STARTED)
					svc_restart (deps);
			} else if (strcmp (optarg, "restart") == 0) {
				svc_restart (deps);
			} else if (strcmp (optarg, "start") == 0) {
				svc_start (deps);
			} else if (strcmp (optarg, "stop") == 0) {
				if (deps && in_background)
					get_started_services ();

				svc_stop (deps);

				if (deps) {
					if (! in_background &&
					    ! rc_runlevel_stopping () &&
					    rc_service_state (service) & RC_SERVICE_STOPPED)
						uncoldplug ();

					if (in_background &&
					    rc_service_state (service) & RC_SERVICE_INACTIVE)
					{
						int j;
						STRLIST_FOREACH (restart_services, svc, j)
							if (rc_service_state (svc) & RC_SERVICE_STOPPED)
								rc_service_schedule_start (service, svc);
					}
				}
			} else if (strcmp (optarg, "zap") == 0) {
				einfo ("Manually resetting %s to stopped state", applet);
				rc_service_mark (applet, RC_SERVICE_STOPPED);
				uncoldplug ();
			} else
				svc_exec (optarg, NULL);

			/* We should ensure this list is empty after an action is done */
			rc_strlist_free (restart_services);
			restart_services = NULL;
		}

		if (! doneone)
			usage (EXIT_FAILURE);
	}

	return (retval);
}