commit: 13ca79856e5836117e469c3edbcfd4bf47b6bab0
Author: William Hubbs <w.d.hubbs <AT> gmail <DOT> com>
AuthorDate: Thu Apr 6 22:13:59 2017 +0000
Commit: William Hubbs <williamh <AT> gentoo <DOT> org>
CommitDate: Thu Apr 6 22:13:59 2017 +0000
URL: https://gitweb.gentoo.org/proj/openrc.git/commit/?id=13ca7985
add init process
openrc-init.c and openrc-shutdown.c are based on code which was written by
James Hammons <jlhamm <AT> acm.org>, so I would like to publically
thank him for his work.
NEWS.md | 7 ++
etc/rc.conf | 5 ++
man/Makefile | 2 +-
man/openrc-init.8 | 46 +++++++++++++
man/openrc-shutdown.8 | 42 ++++++++++++
src/librc/rc.h.in | 1 +
src/rc/.gitignore | 2 +
src/rc/Makefile | 21 +++++-
src/rc/openrc-init.c | 168 +++++++++++++++++++++++++++++++++++++++++++++++
src/rc/openrc-shutdown.c | 119 +++++++++++++++++++++++++++++++++
10 files changed, 410 insertions(+), 3 deletions(-)
diff --git a/NEWS.md b/NEWS.md
index 9d5117f8..90a452b6 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -3,6 +3,13 @@
This file will contain a list of notable changes for each release. Note
the information in this file is in reverse order.
+## OpenRC-0.25
+
+This version contains an OpenRC-specific implementation of init for
+Linux which can be used in place of sysvinit or any other init process.
+For information on its usage, see the man pages for openrc-init (8) and
+openrc-shutdown (8).
+
## OpenRC-0.24.1
This version starts cleaning up the dependencies so that rc_parallel
diff --git a/etc/rc.conf b/etc/rc.conf
index 028ceab4..689e6be2 100644
--- a/etc/rc.conf
+++ b/etc/rc.conf
@@ -178,6 +178,11 @@
# "xenU" - XenU Domain (Linux and NetBSD)
#rc_sys=""
+# if you use openrc-init, which is currently only available on Linux,
+# this is the default runlevel to activate after "sysinit" and "boot"
+# when booting.
+#rc_default_runlevel="default"
+
# on Linux and Hurd, this is the number of ttys allocated for logins
# It is used in the consolefont, keymaps, numlock and termencoding
# service scripts.
diff --git a/man/Makefile b/man/Makefile
index 48c58429..a72b7e72 100644
--- a/man/Makefile
+++ b/man/Makefile
@@ -9,7 +9,7 @@ MAN8= rc-service.8 rc-status.8 rc-update.8 openrc.8
openrc-run.8 \
service.8 start-stop-daemon.8 supervise-daemon.8
ifeq (${OS},Linux)
-MAN8 += rc-sstat.8
+MAN8 += rc-sstat.8 openrc-init.8 openrc-shutdown.8
endif
# Handy macro to create symlinks
diff --git a/man/openrc-init.8 b/man/openrc-init.8
new file mode 100644
index 00000000..93068f10
--- /dev/null
+++ b/man/openrc-init.8
@@ -0,0 +1,46 @@
+.\" Copyright (c) 2017 The OpenRC Authors.
+.\" See the Authors file at the top-level directory of this distribution and
+.\" https://github.com/OpenRC/openrc/blob/master/AUTHORS
+.\"
+.\" This file is part of OpenRC. It is subject to the license terms in
+.\" the LICENSE file found in the top-level directory of this
+.\" distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+.\" This file may not be copied, modified, propagated, or distributed
+.\" except according to the terms contained in the LICENSE file.
+.\"
+.Dd April 6, 2017
+.Dt openrc-init 8 SMM
+.Os OpenRC
+.Sh NAME
+.Nm openrc-init
+.Nd the parent of all processes
+.Sh SYNOPSIS
+.Nm
+.Sh DESCRIPTION
+.Nm
+is an init process which can be an alternative to sysvinit or any other
+init process.
+.Pp
+To use
+.Nm
+configure your boot loader to invoke it or symlink it to /sbin/init.
+Also, you will need to use
+.Xr openrc-shutdown 8 ,
+to halt, reboot or poweroff the system.
+.Pp
+The default runlevel is read from the init command line, the
+rc_default_runlevel setting in rc.conf, the kernel command line, or it is
+assumed to be "default" if it is not set in any of these places.
+.Pp
+.Nm
+doesn't manage getty's directly, so you will need to manage them another
+way. For example, you can use the agetty service script as described in
+agetty-guide.md in this distribution.
+.Sh BUGS
+OpenRC 0.25 contains the first release of this init process.
+I do not know of any specific issues. However, if you use it, please be
+aware that there may be bugs and report any issues you find.
+.Sh SEE ALSO
+.Xr openrc-shutdown 8 ,
+.Sh AUTHORS
+.An William Hubbs <w.d.hu...@gmail.com>
diff --git a/man/openrc-shutdown.8 b/man/openrc-shutdown.8
new file mode 100644
index 00000000..98ec64a6
--- /dev/null
+++ b/man/openrc-shutdown.8
@@ -0,0 +1,42 @@
+.\" Copyright (c) 2017 The OpenRC Authors.
+.\" See the Authors file at the top-level directory of this distribution and
+.\" https://github.com/OpenRC/openrc/blob/master/AUTHORS
+.\"
+.\" This file is part of OpenRC. It is subject to the license terms in
+.\" the LICENSE file found in the top-level directory of this
+.\" distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+.\" This file may not be copied, modified, propagated, or distributed
+.\" except according to the terms contained in the LICENSE file.
+.\"
+.Dd April 6, 2017
+.Dt openrc-shutdown 8 SMM
+.Os OpenRC
+.Sh NAME
+.Nm openrc-shutdown
+.Nd bring the system down
+.Sh SYNOPSIS
+.Nm
+.Op Fl H , -halt
+.Op Fl k , -kexec
+.Op Fl p , -poweroff
+.Op Fl r , -reboot
+.Sh DESCRIPTION
+.Nm
+is the utility that communicates with openrc-init(8) to bring down the
+system. The following options affect how the system is brought down:
+.Bl -tag -width "poweroff"
+.It Fl H , -halt
+Stop all services, kill all remaining processes and halt the system.
+.It Fl k , -kexec
+Stop all services, kill all processes and boot directly into a new
+kernel loaded via kexec(8).
+.It Fl p , -poweroff
+Stop all services, kill all processes and power off the system.
+.It Fl r , -reboot
+Stop all services, kill all processes and reboot the system.
+.El
+.Sh SEE ALSO
+.Xr openrc-init 8 ,
+.Xr kexec 8 ,
+.Sh AUTHORS
+.An William Hubbs <w.d.hu...@gmail.com>
diff --git a/src/librc/rc.h.in b/src/librc/rc.h.in
index 92ecbb4e..1f984d52 100644
--- a/src/librc/rc.h.in
+++ b/src/librc/rc.h.in
@@ -39,6 +39,7 @@ extern "C" {
#define RC_CONFDIR RC_SYSCONFDIR "/conf.d"
#define RC_PLUGINDIR RC_LIBDIR "/plugins"
+#define RC_INIT_FIFO RC_SVCDIR"/init.ctl"
#define RC_PROFILE_ENV RC_SYSCONFDIR "/profile.env"
#define RC_SYS_WHITELIST RC_LIBEXECDIR "/conf.d/env_whitelist"
#define RC_USR_WHITELIST RC_SYSCONFDIR "/conf.d/env_whitelist"
diff --git a/src/rc/.gitignore b/src/rc/.gitignore
index c9779194..c3e7b3f6 100644
--- a/src/rc/.gitignore
+++ b/src/rc/.gitignore
@@ -59,4 +59,6 @@ mark_service_failed
rc-abort
rc
openrc
+openrc-init
openrc-run
+openrc-shutdown
diff --git a/src/rc/Makefile b/src/rc/Makefile
index 74d74a08..2bc03f76 100644
--- a/src/rc/Makefile
+++ b/src/rc/Makefile
@@ -1,3 +1,7 @@
+include ../../Makefile.inc
+MK= ../../mk
+include ${MK}/os.mk
+
SRCS= checkpath.c do_e.c do_mark_service.c do_service.c \
do_value.c fstabinfo.c is_newer_than.c is_older_than.c \
mountinfo.c openrc-run.c rc-abort.c rc.c \
@@ -9,6 +13,10 @@ ifeq (${MKSELINUX},yes)
SRCS+= rc-selinux.c
endif
+ifeq (${OS},Linux)
+SRCS+= openrc-init.c openrc-shutdown.c
+endif
+
CLEANFILES= version.h rc-selinux.o
BINDIR= ${PREFIX}/bin
@@ -34,6 +42,11 @@ RC_SBINPROGS= mark_service_starting
mark_service_started \
mark_service_inactive mark_service_wasinactive \
mark_service_hotplugged mark_service_failed \
rc-abort swclock
+
+ifeq (${OS},Linux)
+SBINPROGS+= openrc-init openrc-shutdown
+endif
+
ALL_PROGS= ${BINPROGS} ${SBINPROGS} ${RC_BINPROGS} ${RC_SBINPROGS}
CLEANFILES+= ${ALL_PROGS}
@@ -41,8 +54,6 @@ LOCAL_CPPFLAGS=-I../includes -I../librc -I../libeinfo
LOCAL_LDFLAGS=-L../librc -L../libeinfo
LDADD+= -lutil -lrc -leinfo
-include ../../Makefile.inc
-MK= ../../mk
include ${MK}/prog.mk
include ${MK}/gitver.mk
include ${MK}/cc.mk
@@ -96,6 +107,9 @@ veinfo vewarn vebegin veend vewend veindent veoutdent:
do_e.o rc-misc.o
fstabinfo: fstabinfo.o _usage.o rc-misc.o
${CC} ${LOCAL_CFLAGS} ${LOCAL_LDFLAGS} ${CFLAGS} ${LDFLAGS} -o $@ $^
${LDADD}
+openrc-init: openrc-init.o
+ ${CC} ${LOCAL_CFLAGS} ${LOCAL_LDFLAGS} ${CFLAGS} ${LDFLAGS} -o $@ $^
${LDADD}
+
is_newer_than: is_newer_than.o rc-misc.o
${CC} ${LOCAL_CFLAGS} ${LOCAL_LDFLAGS} ${CFLAGS} ${LDFLAGS} -o $@ $^
${LDADD}
@@ -114,6 +128,9 @@ mountinfo: mountinfo.o _usage.o rc-misc.o
openrc rc: rc.o rc-logger.o rc-misc.o rc-plugin.o _usage.o
${CC} ${LOCAL_CFLAGS} ${LOCAL_LDFLAGS} ${CFLAGS} ${LDFLAGS} -o $@ $^
${LDADD}
+openrc-shutdown: openrc-shutdown.o _usage.o
+ ${CC} ${LOCAL_CFLAGS} ${LOCAL_LDFLAGS} ${CFLAGS} ${LDFLAGS} -o $@ $^
${LDADD}
+
openrc-run runscript: openrc-run.o _usage.o rc-misc.o rc-plugin.o
ifeq (${MKSELINUX},yes)
openrc-run runscript: rc-selinux.o
diff --git a/src/rc/openrc-init.c b/src/rc/openrc-init.c
new file mode 100644
index 00000000..e7d62432
--- /dev/null
+++ b/src/rc/openrc-init.c
@@ -0,0 +1,168 @@
+/*
+ * openrc-init.c
+ * This is the init process (pid 1) for OpenRC.
+ */
+
+/*
+ * Copyright (c) 2017 The OpenRC Authors.
+ * See the Authors file at the top-level directory of this distribution and
+ * https://github.com/OpenRC/openrc/blob/master/AUTHORS
+ *
+ * This file is part of OpenRC. It is subject to the license terms in
+ * the LICENSE file found in the top-level directory of this
+ * distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+ * This file may not be copied, modified, propagated, or distributed
+ * except according to the terms contained in the LICENSE file.
+ */
+
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/reboot.h>
+#include <sys/wait.h>
+
+#include "helpers.h"
+#include "rc.h"
+#include "version.h"
+
+static const char *rc_default_runlevel = "default";
+
+static pid_t do_openrc(const char *runlevel)
+{
+ pid_t pid;
+
+ pid = fork();
+ switch(pid) {
+ case -1:
+ perror("fork");
+ break;
+ case 0:
+ setsid();
+ printf("Starting %s runlevel\n", runlevel);
+ execl("/sbin/openrc", "/sbin/openrc", runlevel, NULL);
+ perror("exec");
+ break;
+ default:
+ break;
+ }
+ return pid;
+}
+
+static void init(const char *default_runlevel)
+{
+ const char *runlevel = NULL;
+ pid_t pid;
+
+ pid = do_openrc("sysinit");
+ waitpid(pid, NULL, 0);
+ pid = do_openrc("boot");
+ waitpid(pid, NULL, 0);
+ if (default_runlevel)
+ runlevel = default_runlevel;
+ else
+ runlevel = rc_conf_value("rc_default_runlevel");
+ if (!runlevel)
+ runlevel = rc_default_runlevel;
+ if (!rc_runlevel_exists(runlevel)) {
+ printf("%s is an invalid runlevel\n", runlevel);
+ runlevel = rc_default_runlevel;
+ }
+ pid = do_openrc(runlevel);
+ waitpid(pid, NULL, 0);
+}
+
+static void handle_shutdown(const char *runlevel, int cmd)
+{
+ pid_t pid;
+
+ pid = do_openrc(runlevel);
+ while (waitpid(pid, NULL, 0) != pid);
+ sync();
+ reboot(cmd);
+}
+
+static void reap_zombies(void)
+{
+ pid_t pid;
+
+ for (;;) {
+ pid = waitpid(-1, NULL, WNOHANG);
+ if (pid == 0)
+ break;
+ else if (pid == -1) {
+ if (errno == ECHILD)
+ break;
+ perror("waitpid");
+ continue;
+ }
+ }
+}
+
+static void signal_handler(int sig)
+{
+ switch(sig) {
+ case SIGINT:
+ handle_shutdown("reboot", RB_AUTOBOOT);
+ break;
+ case SIGCHLD:
+ reap_zombies();
+ break;
+ default:
+ printf("Unknown signal received, %d\n", sig);
+ break;
+ }
+}
+
+int main(int argc, char **argv)
+{
+ char *default_runlevel = NULL;
+ char buf[2048];
+ int count;
+ FILE *fifo;
+ struct sigaction sa;
+
+ if (getpid() != 1)
+ return 1;
+
+ if (argc > 1)
+ default_runlevel = argv[1];
+
+ printf("OpenRC init version %s starting\n", VERSION);
+ init(default_runlevel);
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = signal_handler;
+ sigaction(SIGCHLD, &sa, NULL);
+ sigaction(SIGINT, &sa, NULL);
+ reboot(RB_DISABLE_CAD);
+
+ if (mkfifo(RC_INIT_FIFO, 0600) == -1)
+ perror("mkfifo");
+
+ for (;;) {
+ /* This will block until a command is sent down the pipe... */
+ fifo = fopen(RC_INIT_FIFO, "r");
+ if (!fifo) {
+ if (errno != EINTR)
+ perror("fopen");
+ continue;
+ }
+ count = fread(buf, 1, 2048, fifo);
+ buf[count] = 0;
+ fclose(fifo);
+ printf("PID1: Received \"%s\" from FIFO...\n", buf);
+ if (strcmp(buf, "halt") == 0)
+ handle_shutdown("shutdown", RB_HALT_SYSTEM);
+ else if (strcmp(buf, "kexec") == 0)
+ handle_shutdown("reboot", RB_KEXEC);
+ else if (strcmp(buf, "poweroff") == 0)
+ handle_shutdown("shutdown", RB_POWER_OFF);
+ else if (strcmp(buf, "reboot") == 0)
+ handle_shutdown("reboot", RB_AUTOBOOT);
+ }
+ return 0;
+}
diff --git a/src/rc/openrc-shutdown.c b/src/rc/openrc-shutdown.c
new file mode 100644
index 00000000..b68ffd36
--- /dev/null
+++ b/src/rc/openrc-shutdown.c
@@ -0,0 +1,119 @@
+/*
+ * openrc-shutdown.c
+ * If you are using OpenRC's provided init, this will shut down or
+ * reboot your system.
+ */
+
+/*
+ * Copyright 2017 The OpenRC Authors.
+ * See the Authors file at the top-level directory of this distribution and
+ * https://github.com/OpenRC/openrc/blob/master/AUTHORS
+ *
+ * This file is part of OpenRC. It is subject to the license terms in
+ * the LICENSE file found in the top-level directory of this
+ * distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+ * This file may not be copied, modified, propagated, or distributed
+ * except according to the terms contained in the LICENSE file.
+ */
+
+#include <getopt.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include "einfo.h"
+#include "rc.h"
+#include "helpers.h"
+#include "_usage.h"
+
+const char *applet = NULL;
+const char *extraopts = NULL;
+const char *getoptstring = "kpr" getoptstring_COMMON;
+const struct option longopts[] = {
+ { "halt", no_argument, NULL, 'H'},
+ { "kexec", no_argument, NULL, 'k'},
+ { "poweroff", no_argument, NULL, 'p'},
+ { "reboot", no_argument, NULL, 'r'},
+ longopts_COMMON
+};
+const char * const longopts_help[] = {
+ "halt the system",
+ "reboot the system using kexec",
+ "power off the system",
+ "reboot the system",
+ longopts_help_COMMON
+};
+const char *usagestring = NULL;
+const char *exclusive = "Select one of --halt, --kexec, --poweroff or
--reboot";
+
+static void send_cmd(const char *cmd)
+{
+ FILE *fifo;
+ size_t ignored;
+
+ fifo = fopen(RC_INIT_FIFO, "w");
+
+ if (!fifo) {
+ perror("fopen");
+ return;
+ }
+
+ ignored = fwrite(cmd, 1, strlen(cmd), fifo);
+ if (ignored != strlen(cmd))
+ printf("Error writing to init fifo\n");
+ fclose(fifo);
+}
+
+int main(int argc, char **argv)
+{
+ int opt;
+ int cmd_count = 0;
+ bool do_halt = false;
+ bool do_kexec = false;
+ bool do_poweroff = false;
+ bool do_reboot = false;
+
+ applet = basename_c(argv[0]);
+if (geteuid() != 0)
+ eerrorx("%s: you must be root\n", applet);
+ while ((opt = getopt_long(argc, argv, getoptstring,
+ longopts, (int *) 0)) != -1)
+ {
+ switch (opt) {
+ case 'H':
+ do_halt = true;
+ cmd_count++;
+ break;
+ case 'k':
+ do_kexec = true;
+ cmd_count++;
+ break;
+ case 'p':
+ do_poweroff = true;
+ cmd_count++;
+ break;
+ case 'r':
+ do_reboot = true;
+ cmd_count++;
+ break;
+ case_RC_COMMON_GETOPT
+ }
+ }
+ if (cmd_count != 1) {
+ eerror("%s: %s\n", applet, exclusive);
+ usage(EXIT_FAILURE);
+ }
+ if (do_halt)
+ send_cmd("halt");
+ else if (do_kexec)
+ send_cmd("kexec");
+ else if (do_poweroff)
+ send_cmd("poweroff");
+ else if (do_reboot)
+ send_cmd("reboot");
+ return 0;
+}
