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/*
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation
*
* 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.
*/
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/reboot.h>
#include <libubox/uloop.h>
#include <libubus.h>
#include <limits.h>
#include <stdlib.h>
#include <fcntl.h>
#include <getopt.h>
#include <libgen.h>
#include <regex.h>
#include <unistd.h>
#include <stdio.h>
#if defined(WITH_SELINUX)
#include <selinux/selinux.h>
#include <selinux/restorecon.h>
#include <selinux/avc.h>
#endif
#include "../utils/utils.h"
#include "init.h"
#include "../watchdog.h"
unsigned int debug = 0;
static void
signal_shutdown(int signal, siginfo_t *siginfo, void *data)
{
fprintf(stderr, "reboot\n");
fflush(stderr);
sync();
sleep(2);
reboot(RB_AUTOBOOT);
while (1)
;
}
static struct sigaction sa_shutdown = {
.sa_sigaction = signal_shutdown,
.sa_flags = SA_SIGINFO
};
static void
cmdline(void)
{
char line[20];
char* res;
long r;
res = get_cmdline_val("init_debug", line, sizeof(line));
if (res != NULL) {
r = strtol(line, NULL, 10);
if ((r != LONG_MIN) && (r != LONG_MAX))
debug = (int) r;
}
}
#if defined(WITH_SELINUX)
static int
selinux(char **argv)
{
int ret;
int enforce = selinux_status_getenforce();
if (getenv("SELINUX_INIT")) {
/* SELinux already initialized */
if (getenv("SELINUX_RESTORECON")) {
unsetenv("SELINUX_INIT");
unsetenv("SELINUX_RESTORECON");
return 0;
}
/* Second call: restore filesystem labels */
ret = selinux_restorecon("/", SELINUX_RESTORECON_RECURSE);
putenv("SELINUX_RESTORECON=1");
} else {
/* First call: load policy */
ret = selinux_init_load_policy(&enforce);
putenv("SELINUX_INIT=1");
}
if (ret == 0)
execv(argv[0], argv);
if (enforce > 0) {
fprintf(stderr, "Cannot load SELinux policy, but system in enforcing mode. Halting.\n");
return 1;
}
return 0;
}
#else
static int
selinux(char **argv)
{
return 0;
}
#endif
int
main(int argc, char **argv)
{
pid_t pid;
ulog_open(ULOG_KMSG, LOG_DAEMON, "init");
sigaction(SIGTERM, &sa_shutdown, NULL);
sigaction(SIGUSR1, &sa_shutdown, NULL);
sigaction(SIGUSR2, &sa_shutdown, NULL);
sigaction(SIGPWR, &sa_shutdown, NULL);
if (selinux(argv))
exit(-1);
early();
cmdline();
watchdog_init(1);
pid = fork();
if (!pid) {
char *kmod[] = { "/sbin/kmodloader", "/etc/modules-boot.d/", NULL };
if (debug < 3)
patch_stdio("/dev/null");
execvp(kmod[0], kmod);
ERROR("Failed to start kmodloader: %m\n");
exit(EXIT_FAILURE);
}
if (pid <= 0) {
ERROR("Failed to start kmodloader instance: %m\n");
} else {
const struct timespec req = {0, 10 * 1000 * 1000};
int i;
for (i = 0; i < 1200; i++) {
if (waitpid(pid, NULL, WNOHANG) > 0)
break;
nanosleep(&req, NULL);
watchdog_ping();
}
}
uloop_init();
preinit();
uloop_run();
return 0;
}
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