/* Standard reboot/shutdown utilities talk to init using /dev/initctl.
* We should check if the fifo was recreated and reopen it.
*/
static void parse(void *UNUSED(arg), int fd, int UNUSED(events))
{
struct init_request rq;
_d("Receiving request on %s...", FINIT_FIFO);
while (1) {
ssize_t len = read(fd, &rq, sizeof(rq));
if (len <= 0) {
if (-1 == len) {
if (EINTR == errno)
continue;
if (EAGAIN == errno)
break;
_e("Failed reading initctl request, error %d: %s", errno, strerror(errno));
}
break;
}
if (rq.magic != INIT_MAGIC || len != sizeof(rq)) {
_e("Invalid initctl request.");
break;
}
_d("Magic OK...");
if (rq.cmd == INIT_CMD_RUNLVL) {
switch (rq.runlevel) {
case '0':
_d("Halting system (SIGUSR2)");
do_shutdown(SIGUSR2);
break;
case 's':
case 'S':
rq.runlevel = '1';
/* Fall through to regular processing */
case '1'...'5':
_d("Setting new runlevel %c ...", rq.runlevel);
svc_runlevel(rq.runlevel - '0');
break;
case '6':
_d("Rebooting system (SIGUSR1)");
do_shutdown(SIGUSR1);
break;
default:
_d("Unsupported runlevel: %d", rq.runlevel);
break;
}
} else if (rq.cmd == INIT_CMD_DEBUG) {
debug = !debug;
} else {
_d("Unsupported cmd: %d", rq.cmd);
}
}
int main(int argc, char* argv[])
{
if (getpid() != 1)
return client(argc, argv);
/*
* Hello world.
*/
banner();
/*
* Initial setup of signals, ignore all until we're up.
*/
sig_init();
/*
* Mount base file system, kernel is assumed to run devtmpfs for /dev
*/
chdir("/");
umask(0);
mount("none", "/proc", "proc", 0, NULL);
mount("none", "/proc/bus/usb", "usbfs", 0, NULL);
mount("none", "/sys", "sysfs", 0, NULL);
mkdir("/dev/pts", 0755);
mkdir("/dev/shm", 0755);
mount("none", "/dev/pts", "devpts", 0, "gid=5,mode=620");
mount("none", "/dev/shm", "tmpfs", 0, NULL);
umask(022);
/*
* Parse kernel parameters
*/
parse_kernel_cmdline();
/*
* Populate /dev and prepare for runtime events from kernel.
*/
run_interactive(SETUP_DEVFS, "Populating device tree");
/*
* Parse configuration file
*/
parse_finit_conf(FINIT_CONF);
/*
* Load plugins. Must run after finit.conf has registered
* all services, or service plugins won't have anything to
* hook on to.
*/
print_desc("Loading plugins", NULL);
print_result(plugin_load_all(PLUGIN_PATH));
/*
* Mount filesystems
*/
#ifdef REMOUNT_ROOTFS_RW
run("/bin/mount -n -o remount,rw /");
#endif
#ifdef SYSROOT
run(SYSROOT, "/", NULL, MS_MOVE, NULL);
#endif
_d("Root FS up, calling hooks ...");
plugin_run_hooks(HOOK_ROOTFS_UP);
umask(0);
run("/bin/mount -na");
run("/sbin/swapon -ea");
umask(0022);
/* Cleanup stale files, if any still linger on. */
run_interactive("rm -rf /tmp/* /var/run/* /var/lock/*", "Cleanup temporary directories");
/* Base FS up, enable standard SysV init signals */
sig_setup();
_d("Base FS up, calling hooks ...");
plugin_run_hooks(HOOK_BASEFS_UP);
/*
* Start all bootstrap tasks, no network available!
*/
svc_bootstrap();
/*
* Network stuff
*/
/* Setup kernel specific settings, e.g. allow broadcast ping, etc. */
run("/sbin/sysctl -e -p /etc/sysctl.conf >/dev/null");
/* Set initial hostname. */
set_hostname(hostname);
ifconfig("lo", "127.0.0.1", "255.0.0.0", 1);
if (network)
run_interactive(network, "Starting networking: %s", network);
umask(022);
/* Hooks that rely on loopback, or basic networking being up. */
plugin_run_hooks(HOOK_NETWORK_UP);
/*
* Start all tasks/services in the configured runlevel
*/
svc_runlevel(cfglevel);
_d("Running svc up hooks ...");
plugin_run_hooks(HOOK_SVC_UP);
/*
* Run startup scripts in /etc/finit.d/, if any.
*/
if (rcsd && fisdir(rcsd)) {
_d("Running startup scripts in %s ...", rcsd);
run_parts(rcsd, NULL);
}
/* Hooks that should run at the very end */
plugin_run_hooks(HOOK_SYSTEM_UP);
/*
* Enter main loop to monior /dev/initctl and services
*/
return run_loop();
}
