Initial Contribution
diff --git a/init/init.c b/init/init.c
new file mode 100644
index 0000000..f6e9b39
--- /dev/null
+++ b/init/init.c
@@ -0,0 +1,891 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/poll.h>
+#include <time.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <mtd/mtd-user.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/reboot.h>
+
+#include <cutils/sockets.h>
+#include <termios.h>
+#include <linux/kd.h>
+
+#include <sys/system_properties.h>
+
+#include "devices.h"
+#include "init.h"
+#include "property_service.h"
+
+#ifndef BOOTCHART
+# define BOOTCHART 0
+#endif
+
+static int property_triggers_enabled = 0;
+
+#if BOOTCHART
+static int bootchart_count;
+extern int bootchart_init(void);
+extern int bootchart_step(void);
+extern void bootchart_finish(void);
+# define BOOTCHART_POLLING_MS 200 /* polling period in ms */
+# define BOOTCHART_MAX_TIME_MS (2*60*1000) /* max polling time from boot */
+# define BOOTCHART_MAX_COUNT (BOOTCHART_MAX_TIME_MS/BOOTCHART_POLLING_MS)
+#endif
+
+static char console[32];
+static char serialno[32];
+static char bootmode[32];
+static char baseband[32];
+static char carrier[32];
+static char bootloader[32];
+static char hardware[32];
+static unsigned revision = 0;
+static char qemu[32];
+
+static void drain_action_queue(void);
+
+static void notify_service_state(const char *name, const char *state)
+{
+ char pname[PROP_NAME_MAX];
+ int len = strlen(name);
+ if ((len + 10) > PROP_NAME_MAX)
+ return;
+ snprintf(pname, sizeof(pname), "init.svc.%s", name);
+ property_set(pname, state);
+}
+
+static int have_console;
+static char *console_name = "/dev/console";
+static time_t process_needs_restart;
+
+static const char *ENV[32];
+
+/* add_environment - add "key=value" to the current environment */
+int add_environment(const char *key, const char *val)
+{
+ int n;
+
+ for (n = 0; n < 31; n++) {
+ if (!ENV[n]) {
+ size_t len = strlen(key) + strlen(val) + 2;
+ char *entry = malloc(len);
+ snprintf(entry, len, "%s=%s", key, val);
+ ENV[n] = entry;
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+static void zap_stdio(void)
+{
+ int fd;
+ fd = open("/dev/null", O_RDWR);
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ close(fd);
+}
+
+static void open_console()
+{
+ int fd;
+ if ((fd = open(console_name, O_RDWR)) < 0) {
+ fd = open("/dev/null", O_RDWR);
+ }
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ close(fd);
+}
+
+/*
+ * gettime() - returns the time in seconds of the system's monotonic clock or
+ * zero on error.
+ */
+static time_t gettime(void)
+{
+ struct timespec ts;
+ int ret;
+
+ ret = clock_gettime(CLOCK_MONOTONIC, &ts);
+ if (ret < 0) {
+ ERROR("clock_gettime(CLOCK_MONOTONIC) failed: %s\n", strerror(errno));
+ return 0;
+ }
+
+ return ts.tv_sec;
+}
+
+static void publish_socket(const char *name, int fd)
+{
+ char key[64] = ANDROID_SOCKET_ENV_PREFIX;
+ char val[64];
+
+ strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1,
+ name,
+ sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX));
+ snprintf(val, sizeof(val), "%d", fd);
+ add_environment(key, val);
+
+ /* make sure we don't close-on-exec */
+ fcntl(fd, F_SETFD, 0);
+}
+
+void service_start(struct service *svc)
+{
+ struct stat s;
+ pid_t pid;
+ int needs_console;
+ int n;
+
+ /* starting a service removes it from the disabled
+ * state and immediately takes it out of the restarting
+ * state if it was in there
+ */
+ svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING));
+ svc->time_started = 0;
+
+ /* running processes require no additional work -- if
+ * they're in the process of exiting, we've ensured
+ * that they will immediately restart on exit, unless
+ * they are ONESHOT
+ */
+ if (svc->flags & SVC_RUNNING) {
+ return;
+ }
+
+ needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0;
+ if (needs_console && (!have_console)) {
+ ERROR("service '%s' requires console\n", svc->name);
+ svc->flags |= SVC_DISABLED;
+ return;
+ }
+
+ if (stat(svc->args[0], &s) != 0) {
+ ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name);
+ svc->flags |= SVC_DISABLED;
+ return;
+ }
+
+ NOTICE("starting '%s'\n", svc->name);
+
+ pid = fork();
+
+ if (pid == 0) {
+ struct socketinfo *si;
+ struct svcenvinfo *ei;
+ char tmp[32];
+ int fd, sz;
+
+ get_property_workspace(&fd, &sz);
+ sprintf(tmp, "%d,%d", dup(fd), sz);
+ add_environment("ANDROID_PROPERTY_WORKSPACE", tmp);
+
+ for (ei = svc->envvars; ei; ei = ei->next)
+ add_environment(ei->name, ei->value);
+
+ for (si = svc->sockets; si; si = si->next) {
+ int s = create_socket(si->name,
+ !strcmp(si->type, "dgram") ?
+ SOCK_DGRAM : SOCK_STREAM,
+ si->perm, si->uid, si->gid);
+ if (s >= 0) {
+ publish_socket(si->name, s);
+ }
+ }
+
+ if (needs_console) {
+ setsid();
+ open_console();
+ } else {
+ zap_stdio();
+ }
+
+#if 0
+ for (n = 0; svc->args[n]; n++) {
+ INFO("args[%d] = '%s'\n", n, svc->args[n]);
+ }
+ for (n = 0; ENV[n]; n++) {
+ INFO("env[%d] = '%s'\n", n, ENV[n]);
+ }
+#endif
+
+ setpgid(0, getpid());
+
+ /* as requested, set our gid, supplemental gids, and uid */
+ if (svc->gid) {
+ setgid(svc->gid);
+ }
+ if (svc->nr_supp_gids) {
+ setgroups(svc->nr_supp_gids, svc->supp_gids);
+ }
+ if (svc->uid) {
+ setuid(svc->uid);
+ }
+
+ execve(svc->args[0], (char**) svc->args, (char**) ENV);
+ _exit(127);
+ }
+
+ if (pid < 0) {
+ ERROR("failed to start '%s'\n", svc->name);
+ svc->pid = 0;
+ return;
+ }
+
+ svc->time_started = gettime();
+ svc->pid = pid;
+ svc->flags |= SVC_RUNNING;
+
+ notify_service_state(svc->name, "running");
+}
+
+void service_stop(struct service *svc)
+{
+ /* we are no longer running, nor should we
+ * attempt to restart
+ */
+ svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING));
+
+ /* if the service has not yet started, prevent
+ * it from auto-starting with its class
+ */
+ svc->flags |= SVC_DISABLED;
+
+ if (svc->pid) {
+ NOTICE("service '%s' is being killed\n", svc->name);
+ kill(-svc->pid, SIGTERM);
+ notify_service_state(svc->name, "stopping");
+ } else {
+ notify_service_state(svc->name, "stopped");
+ }
+}
+
+void property_changed(const char *name, const char *value)
+{
+ if (property_triggers_enabled) {
+ queue_property_triggers(name, value);
+ drain_action_queue();
+ }
+}
+
+#define CRITICAL_CRASH_THRESHOLD 4 /* if we crash >4 times ... */
+#define CRITICAL_CRASH_WINDOW (4*60) /* ... in 4 minutes, goto recovery*/
+
+static int wait_for_one_process(int block)
+{
+ pid_t pid;
+ int status;
+ struct service *svc;
+ struct socketinfo *si;
+ time_t now;
+ struct listnode *node;
+ struct command *cmd;
+
+ while ( (pid = waitpid(-1, &status, block ? 0 : WNOHANG)) == -1 && errno == EINTR );
+ if (pid <= 0) return -1;
+ INFO("waitpid returned pid %d, status = %08x\n", pid, status);
+
+ svc = service_find_by_pid(pid);
+ if (!svc) {
+ ERROR("untracked pid %d exited\n", pid);
+ return 0;
+ }
+
+ NOTICE("process '%s', pid %d exited\n", svc->name, pid);
+
+ if (!(svc->flags & SVC_ONESHOT)) {
+ kill(-pid, SIGKILL);
+ NOTICE("process '%s' killing any children in process group\n", svc->name);
+ }
+
+ /* remove any sockets we may have created */
+ for (si = svc->sockets; si; si = si->next) {
+ char tmp[128];
+ snprintf(tmp, sizeof(tmp), ANDROID_SOCKET_DIR"/%s", si->name);
+ unlink(tmp);
+ }
+
+ svc->pid = 0;
+ svc->flags &= (~SVC_RUNNING);
+
+ /* oneshot processes go into the disabled state on exit */
+ if (svc->flags & SVC_ONESHOT) {
+ svc->flags |= SVC_DISABLED;
+ }
+
+ /* disabled processes do not get restarted automatically */
+ if (svc->flags & SVC_DISABLED) {
+ notify_service_state(svc->name, "stopped");
+ return 0;
+ }
+
+ now = gettime();
+ if (svc->flags & SVC_CRITICAL) {
+ if (svc->time_crashed + CRITICAL_CRASH_WINDOW >= now) {
+ if (++svc->nr_crashed > CRITICAL_CRASH_THRESHOLD) {
+ ERROR("critical process '%s' exited %d times in %d minutes; "
+ "rebooting into recovery mode\n", svc->name,
+ CRITICAL_CRASH_THRESHOLD, CRITICAL_CRASH_WINDOW / 60);
+ sync();
+ __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
+ LINUX_REBOOT_CMD_RESTART2, "recovery");
+ return 0;
+ }
+ } else {
+ svc->time_crashed = now;
+ svc->nr_crashed = 1;
+ }
+ }
+
+ /* Execute all onrestart commands for this service. */
+ list_for_each(node, &svc->onrestart.commands) {
+ cmd = node_to_item(node, struct command, clist);
+ cmd->func(cmd->nargs, cmd->args);
+ }
+ svc->flags |= SVC_RESTARTING;
+ notify_service_state(svc->name, "restarting");
+ return 0;
+}
+
+static void restart_service_if_needed(struct service *svc)
+{
+ time_t next_start_time = svc->time_started + 5;
+
+ if (next_start_time <= gettime()) {
+ svc->flags &= (~SVC_RESTARTING);
+ service_start(svc);
+ return;
+ }
+
+ if ((next_start_time < process_needs_restart) ||
+ (process_needs_restart == 0)) {
+ process_needs_restart = next_start_time;
+ }
+}
+
+static void restart_processes()
+{
+ process_needs_restart = 0;
+ service_for_each_flags(SVC_RESTARTING,
+ restart_service_if_needed);
+}
+
+static int signal_fd = -1;
+
+static void sigchld_handler(int s)
+{
+ write(signal_fd, &s, 1);
+}
+
+static void msg_start(const char *name)
+{
+ struct service *svc = service_find_by_name(name);
+
+ if (svc) {
+ service_start(svc);
+ } else {
+ ERROR("no such service '%s'\n", name);
+ }
+}
+
+static void msg_stop(const char *name)
+{
+ struct service *svc = service_find_by_name(name);
+
+ if (svc) {
+ service_stop(svc);
+ } else {
+ ERROR("no such service '%s'\n");
+ }
+}
+
+void handle_control_message(const char *msg, const char *arg)
+{
+ if (!strcmp(msg,"start")) {
+ msg_start(arg);
+ } else if (!strcmp(msg,"stop")) {
+ msg_stop(arg);
+ } else {
+ ERROR("unknown control msg '%s'\n", msg);
+ }
+}
+
+#define MAX_MTD_PARTITIONS 16
+
+static struct {
+ char name[16];
+ int number;
+} mtd_part_map[MAX_MTD_PARTITIONS];
+
+static int mtd_part_count = -1;
+
+static void find_mtd_partitions(void)
+{
+ int fd;
+ char buf[1024];
+ char *pmtdbufp;
+ ssize_t pmtdsize;
+ int r;
+
+ fd = open("/proc/mtd", O_RDONLY);
+ if (fd < 0)
+ return;
+
+ buf[sizeof(buf) - 1] = '\0';
+ pmtdsize = read(fd, buf, sizeof(buf) - 1);
+ pmtdbufp = buf;
+ while (pmtdsize > 0) {
+ int mtdnum, mtdsize, mtderasesize;
+ char mtdname[16];
+ mtdname[0] = '\0';
+ mtdnum = -1;
+ r = sscanf(pmtdbufp, "mtd%d: %x %x %15s",
+ &mtdnum, &mtdsize, &mtderasesize, mtdname);
+ if ((r == 4) && (mtdname[0] == '"')) {
+ char *x = strchr(mtdname + 1, '"');
+ if (x) {
+ *x = 0;
+ }
+ INFO("mtd partition %d, %s\n", mtdnum, mtdname + 1);
+ if (mtd_part_count < MAX_MTD_PARTITIONS) {
+ strcpy(mtd_part_map[mtd_part_count].name, mtdname + 1);
+ mtd_part_map[mtd_part_count].number = mtdnum;
+ mtd_part_count++;
+ } else {
+ ERROR("too many mtd partitions\n");
+ }
+ }
+ while (pmtdsize > 0 && *pmtdbufp != '\n') {
+ pmtdbufp++;
+ pmtdsize--;
+ }
+ if (pmtdsize > 0) {
+ pmtdbufp++;
+ pmtdsize--;
+ }
+ }
+ close(fd);
+}
+
+int mtd_name_to_number(const char *name)
+{
+ int n;
+ if (mtd_part_count < 0) {
+ mtd_part_count = 0;
+ find_mtd_partitions();
+ }
+ for (n = 0; n < mtd_part_count; n++) {
+ if (!strcmp(name, mtd_part_map[n].name)) {
+ return mtd_part_map[n].number;
+ }
+ }
+ return -1;
+}
+
+static void import_kernel_nv(char *name, int in_qemu)
+{
+ char *value = strchr(name, '=');
+
+ if (value == 0) return;
+ *value++ = 0;
+ if (*name == 0) return;
+
+ if (!in_qemu)
+ {
+ /* on a real device, white-list the kernel options */
+ if (!strcmp(name,"qemu")) {
+ strlcpy(qemu, value, sizeof(qemu));
+ } else if (!strcmp(name,"androidboot.console")) {
+ strlcpy(console, value, sizeof(console));
+ } else if (!strcmp(name,"androidboot.mode")) {
+ strlcpy(bootmode, value, sizeof(bootmode));
+ } else if (!strcmp(name,"androidboot.serialno")) {
+ strlcpy(serialno, value, sizeof(serialno));
+ } else if (!strcmp(name,"androidboot.baseband")) {
+ strlcpy(baseband, value, sizeof(baseband));
+ } else if (!strcmp(name,"androidboot.carrier")) {
+ strlcpy(carrier, value, sizeof(carrier));
+ } else if (!strcmp(name,"androidboot.bootloader")) {
+ strlcpy(bootloader, value, sizeof(bootloader));
+ } else if (!strcmp(name,"androidboot.hardware")) {
+ strlcpy(hardware, value, sizeof(hardware));
+ } else {
+ qemu_cmdline(name, value);
+ }
+ } else {
+ /* in the emulator, export any kernel option with the
+ * ro.kernel. prefix */
+ char buff[32];
+ int len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name );
+ if (len < (int)sizeof(buff)) {
+ property_set( buff, value );
+ }
+ }
+}
+
+static void import_kernel_cmdline(int in_qemu)
+{
+ char cmdline[1024];
+ char *ptr;
+ int fd;
+
+ fd = open("/proc/cmdline", O_RDONLY);
+ if (fd >= 0) {
+ int n = read(fd, cmdline, 1023);
+ if (n < 0) n = 0;
+
+ /* get rid of trailing newline, it happens */
+ if (n > 0 && cmdline[n-1] == '\n') n--;
+
+ cmdline[n] = 0;
+ close(fd);
+ } else {
+ cmdline[0] = 0;
+ }
+
+ ptr = cmdline;
+ while (ptr && *ptr) {
+ char *x = strchr(ptr, ' ');
+ if (x != 0) *x++ = 0;
+ import_kernel_nv(ptr, in_qemu);
+ ptr = x;
+ }
+
+ /* don't expose the raw commandline to nonpriv processes */
+ chmod("/proc/cmdline", 0440);
+}
+
+static void get_hardware_name(void)
+{
+ char data[1024];
+ int fd, n;
+ char *x, *hw, *rev;
+
+ /* Hardware string was provided on kernel command line */
+ if (hardware[0])
+ return;
+
+ fd = open("/proc/cpuinfo", O_RDONLY);
+ if (fd < 0) return;
+
+ n = read(fd, data, 1023);
+ close(fd);
+ if (n < 0) return;
+
+ data[n] = 0;
+ hw = strstr(data, "\nHardware");
+ rev = strstr(data, "\nRevision");
+
+ if (hw) {
+ x = strstr(hw, ": ");
+ if (x) {
+ x += 2;
+ n = 0;
+ while (*x && !isspace(*x)) {
+ hardware[n++] = tolower(*x);
+ x++;
+ if (n == 31) break;
+ }
+ hardware[n] = 0;
+ }
+ }
+
+ if (rev) {
+ x = strstr(rev, ": ");
+ if (x) {
+ revision = strtoul(x + 2, 0, 16);
+ }
+ }
+}
+
+static void drain_action_queue(void)
+{
+ struct listnode *node;
+ struct command *cmd;
+ struct action *act;
+ int ret;
+
+ while ((act = action_remove_queue_head())) {
+ INFO("processing action %p (%s)\n", act, act->name);
+ list_for_each(node, &act->commands) {
+ cmd = node_to_item(node, struct command, clist);
+ ret = cmd->func(cmd->nargs, cmd->args);
+ INFO("command '%s' r=%d\n", cmd->args[0], ret);
+ }
+ }
+}
+
+void open_devnull_stdio(void)
+{
+ int fd;
+ static const char *name = "/dev/__null__";
+ if (mknod(name, S_IFCHR | 0600, (1 << 8) | 3) == 0) {
+ fd = open(name, O_RDWR);
+ unlink(name);
+ if (fd >= 0) {
+ dup2(fd, 0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ if (fd > 2) {
+ close(fd);
+ }
+ return;
+ }
+ }
+
+ exit(1);
+}
+
+int main(int argc, char **argv)
+{
+ int device_fd = -1;
+ int property_set_fd = -1;
+ int signal_recv_fd = -1;
+ int s[2];
+ int fd;
+ struct sigaction act;
+ char tmp[PROP_VALUE_MAX];
+ struct pollfd ufds[4];
+ char *tmpdev;
+
+ act.sa_handler = sigchld_handler;
+ act.sa_flags = SA_NOCLDSTOP;
+ act.sa_mask = 0;
+ act.sa_restorer = NULL;
+ sigaction(SIGCHLD, &act, 0);
+
+ /* clear the umask */
+ umask(0);
+
+ /* Get the basic filesystem setup we need put
+ * together in the initramdisk on / and then we'll
+ * let the rc file figure out the rest.
+ */
+ mkdir("/dev", 0755);
+ mkdir("/proc", 0755);
+ mkdir("/sys", 0755);
+
+ mount("tmpfs", "/dev", "tmpfs", 0, "mode=0755");
+ mkdir("/dev/pts", 0755);
+ mkdir("/dev/socket", 0755);
+ mount("devpts", "/dev/pts", "devpts", 0, NULL);
+ mount("proc", "/proc", "proc", 0, NULL);
+ mount("sysfs", "/sys", "sysfs", 0, NULL);
+
+ /* We must have some place other than / to create the
+ * device nodes for kmsg and null, otherwise we won't
+ * be able to remount / read-only later on.
+ * Now that tmpfs is mounted on /dev, we can actually
+ * talk to the outside world.
+ */
+ open_devnull_stdio();
+ log_init();
+
+ INFO("reading config file\n");
+ parse_config_file("/init.rc");
+
+ /* pull the kernel commandline and ramdisk properties file in */
+ qemu_init();
+ import_kernel_cmdline(0);
+
+ get_hardware_name();
+ snprintf(tmp, sizeof(tmp), "/init.%s.rc", hardware);
+ parse_config_file(tmp);
+
+ action_for_each_trigger("early-init", action_add_queue_tail);
+ drain_action_queue();
+
+ INFO("device init\n");
+ device_fd = device_init();
+
+ property_init();
+
+ if (console[0]) {
+ snprintf(tmp, sizeof(tmp), "/dev/%s", console);
+ console_name = strdup(tmp);
+ }
+
+ fd = open(console_name, O_RDWR);
+ if (fd >= 0)
+ have_console = 1;
+ close(fd);
+
+ if( load_565rle_image(INIT_IMAGE_FILE) ) {
+ fd = open("/dev/tty0", O_WRONLY);
+ if (fd >= 0) {
+ const char *msg;
+ msg = "\n"
+ "\n"
+ "\n"
+ "\n"
+ "\n"
+ "\n"
+ "\n" // console is 40 cols x 30 lines
+ "\n"
+ "\n"
+ "\n"
+ "\n"
+ "\n"
+ "\n"
+ "\n"
+ " A N D R O I D ";
+ write(fd, msg, strlen(msg));
+ close(fd);
+ }
+ }
+
+ if (qemu[0])
+ import_kernel_cmdline(1);
+
+ if (!strcmp(bootmode,"factory"))
+ property_set("ro.factorytest", "1");
+ else if (!strcmp(bootmode,"factory2"))
+ property_set("ro.factorytest", "2");
+ else
+ property_set("ro.factorytest", "0");
+
+ property_set("ro.serialno", serialno[0] ? serialno : "");
+ property_set("ro.bootmode", bootmode[0] ? bootmode : "unknown");
+ property_set("ro.baseband", baseband[0] ? baseband : "unknown");
+ property_set("ro.carrier", carrier[0] ? carrier : "unknown");
+ property_set("ro.bootloader", bootloader[0] ? bootloader : "unknown");
+
+ property_set("ro.hardware", hardware);
+ snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
+ property_set("ro.revision", tmp);
+
+ /* execute all the boot actions to get us started */
+ action_for_each_trigger("init", action_add_queue_tail);
+ drain_action_queue();
+
+ /* read any property files on system or data and
+ * fire up the property service. This must happen
+ * after the ro.foo properties are set above so
+ * that /data/local.prop cannot interfere with them.
+ */
+ property_set_fd = start_property_service();
+
+ /* create a signalling mechanism for the sigchld handler */
+ if (socketpair(AF_UNIX, SOCK_STREAM, 0, s) == 0) {
+ signal_fd = s[0];
+ signal_recv_fd = s[1];
+ fcntl(s[0], F_SETFD, FD_CLOEXEC);
+ fcntl(s[0], F_SETFL, O_NONBLOCK);
+ fcntl(s[1], F_SETFD, FD_CLOEXEC);
+ fcntl(s[1], F_SETFL, O_NONBLOCK);
+ }
+
+ /* make sure we actually have all the pieces we need */
+ if ((device_fd < 0) ||
+ (property_set_fd < 0) ||
+ (signal_recv_fd < 0)) {
+ ERROR("init startup failure\n");
+ return 1;
+ }
+
+ /* execute all the boot actions to get us started */
+ action_for_each_trigger("early-boot", action_add_queue_tail);
+ action_for_each_trigger("boot", action_add_queue_tail);
+ drain_action_queue();
+
+ /* run all property triggers based on current state of the properties */
+ queue_all_property_triggers();
+ drain_action_queue();
+
+ /* enable property triggers */
+ property_triggers_enabled = 1;
+
+ ufds[0].fd = device_fd;
+ ufds[0].events = POLLIN;
+ ufds[1].fd = property_set_fd;
+ ufds[1].events = POLLIN;
+ ufds[2].fd = signal_recv_fd;
+ ufds[2].events = POLLIN;
+
+#if BOOTCHART
+ if (bootchart_init() < 0)
+ ERROR("bootcharting init failure\n");
+ else {
+ NOTICE("bootcharting started\n");
+ bootchart_count = BOOTCHART_MAX_COUNT;
+ }
+#endif
+
+ for(;;) {
+ int nr, timeout = -1;
+
+ ufds[0].revents = 0;
+ ufds[1].revents = 0;
+ ufds[2].revents = 0;
+
+ drain_action_queue();
+ restart_processes();
+
+ if (process_needs_restart) {
+ timeout = (process_needs_restart - gettime()) * 1000;
+ if (timeout < 0)
+ timeout = 0;
+ }
+
+#if BOOTCHART
+ if (bootchart_count > 0) {
+ if (timeout < 0 || timeout > BOOTCHART_POLLING_MS)
+ timeout = BOOTCHART_POLLING_MS;
+ if (bootchart_step() < 0 || --bootchart_count == 0) {
+ bootchart_finish();
+ bootchart_count = 0;
+ }
+ }
+#endif
+ nr = poll(ufds, 3, timeout);
+ if (nr <= 0)
+ continue;
+
+ if (ufds[2].revents == POLLIN) {
+ /* we got a SIGCHLD - reap and restart as needed */
+ read(signal_recv_fd, tmp, sizeof(tmp));
+ while (!wait_for_one_process(0))
+ ;
+ continue;
+ }
+
+ if (ufds[0].revents == POLLIN)
+ handle_device_fd(device_fd);
+
+ if (ufds[1].revents == POLLIN)
+ handle_property_set_fd(property_set_fd);
+ }
+
+ return 0;
+}