Use services to implement shutdown/reboot sequence

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>

.gitignore

@@ -25,3 +25,8 @@ services/hostname
 services/loopback
 services/sysctl
 services/hwclock
+services/shutdown
+services/reboot
+services/sigkill
+services/sigterm
+services/sync

configure.ac

@@ -23,5 +23,10 @@ AC_CONFIG_FILES([services/hostname])
 AC_CONFIG_FILES([services/loopback])
 AC_CONFIG_FILES([services/sysctl])
 AC_CONFIG_FILES([services/hwclock])
+AC_CONFIG_FILES([services/reboot])
+AC_CONFIG_FILES([services/shutdown])
+AC_CONFIG_FILES([services/sigkill])
+AC_CONFIG_FILES([services/sigterm])
+AC_CONFIG_FILES([services/sync])
 
 AC_OUTPUT([Makefile])

initd/Makemodule.am

@@ -1,5 +1,5 @@
 init_SOURCES = initd/main.c initd/runlst.c initd/init.h initd/setup_tty.c
-init_SOURCES += initd/status.c initd/mksock.c initd/shutdown.c initd/svclist.c
+init_SOURCES += initd/status.c initd/mksock.c initd/svclist.c
 init_CPPFLAGS = $(AM_CPPFLAGS)
 init_CFLAGS = $(AM_CFLAGS)
 init_LDFLAGS = $(AM_LDFLAGS)

initd/init.h

@@ -98,16 +98,6 @@ void print_status(const char *msg, int type, bool update);
 */
 int mksock(void);
 
-/********** shutdown.c **********/
-
-/*
-	Kindly tell all processes to go kill themselves, then send
-	a SIGKILL if they don't and perform system shutdown.
-
-	The argument is passed directly to the reboot() syscall.
-*/
-NORETURN void do_shutdown(int type);
-
 /********** svclist.c **********/
 
 /*

initd/main.c

@@ -226,20 +226,12 @@ int main(void)
 	pfd[0].events = pfd[1].events = POLLIN;
 
 	for (;;) {
-		if (!svclist_have_singleshot()) {
-			if (target != runlevel) {
+		if (!svclist_have_singleshot() && target != runlevel) {
 			start_runlevel(target);
 			runlevel = target;
 			continue;
 		}
 
-			if (runlevel == TGT_SHUTDOWN)
-				do_shutdown(RB_POWER_OFF);
-
-			if (runlevel == TGT_REBOOT)
-				do_shutdown(RB_AUTOBOOT);
-		}
-
 		ret = poll(pfd, sizeof(pfd) / sizeof(pfd[0]), -1);
 
 		if (ret > 0) {

initd/shutdown.c

@@ -1,54 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * Copyright (C) 2018 - David Oberhollenzer
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <signal.h>
-#include <stdio.h>
-#include <errno.h>
-#include <time.h>
-
-#include "init.h"
-
-void do_shutdown(int type)
-{
-	struct timespec req, rem;
-
-	print_status("sending SIGTERM to all processes", STATUS_WAIT, false);
-	kill(-1, SIGTERM);
-
-	memset(&req, 0, sizeof(req));
-	memset(&rem, 0, sizeof(rem));
-	req.tv_sec = 5;		/* TODO: make configurable? */
-
-	while (nanosleep(&req, &rem) != 0 && errno == EINTR)
-		req = rem;
-
-	print_status("sending SIGTERM to all processes", STATUS_OK, true);
-	kill(-1, SIGKILL);
-	print_status("sending SIGKILL to remaining processes",
-		     STATUS_OK, false);
-
-	print_status("sync", STATUS_WAIT, false);
-	sync();
-	print_status("sync", STATUS_OK, true);
-
-	reboot(type);
-	perror("reboot system call");
-	exit(EXIT_FAILURE);
-}

services/Makemodule.am

@@ -1,5 +1,7 @@
 initdir = @TEMPLATEDIR@
 init_DATA = services/agetty services/hostname services/loopback
 init_DATA += services/sysctl services/hwclock services/sysinit
+init_DATA += services/reboot services/shutdown services/sigkill
+init_DATA += services/sigterm services/sync
 
 EXTRA_DIST += services/sysinit

services/reboot.in

@@ -0,0 +1,8 @@
+name = "reboot"
+description = "system reboot"
+exec = "@SBINPATH@/shutdown -nrf"
+type = wait
+target = reboot
+after = "sync"
+after = "sigkill"
+after = "sigterm"

services/shutdown.in

@@ -0,0 +1,8 @@
+name = "shutdown"
+description = "system shutdown"
+exec = "@SBINPATH@/shutdown -npf"
+type = wait
+target = shutdown
+after = "sync"
+after = "sigkill"
+after = "sigterm"

services/sigkill.in

@@ -0,0 +1,9 @@
+name = "sigkill"
+description = "send SIGKILL to remaining processes"
+exec = "@SCRIPTDIR@/killall5 9"
+type = wait
+target = "%0"
+after = "sigterm"
+before = "sync"
+before = "shutdown"
+before = "reboot"

services/sigterm.in

@@ -0,0 +1,10 @@
+name = "sigterm"
+description = "send SIGTERM to all processes"
+exec = "@SCRIPTDIR@/killall5 15"
+exec = "@BINPATH@/sleep 5"
+type = wait
+target = "%0"
+before = "sigkill"
+before = "sync"
+before = "reboot"
+before = "shutdown"

services/sync.in

@@ -0,0 +1,9 @@
+name = "sync"
+description = "sync"
+exec = "@BINPATH@/sync"
+type = wait
+target = "%0"
+after = "sigkill"
+after = "sigterm"
+before = "reboot"
+before = "shutdown"