| /* |
| * 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 <linux/keychord.h> |
| |
| #include <sys/system_properties.h> |
| |
| #include "devices.h" |
| #include "init.h" |
| #include "property_service.h" |
| #include "bootchart.h" |
| |
| static int property_triggers_enabled = 0; |
| |
| #if BOOTCHART |
| static int bootchart_count; |
| #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 struct input_keychord *keychords = 0; |
| static int keychords_count = 0; |
| static int keychords_length = 0; |
| |
| 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, const char *dynamic_args) |
| { |
| 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; |
| } |
| |
| if ((!(svc->flags & SVC_ONESHOT)) && dynamic_args) { |
| ERROR("service '%s' must be one-shot to use dynamic args, disabling\n", |
| svc->args[0]); |
| 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); |
| } |
| |
| if (!dynamic_args) { |
| if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0) { |
| ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno)); |
| } |
| } else { |
| char *arg_ptrs[SVC_MAXARGS+1]; |
| int arg_idx = svc->nargs; |
| char *tmp = strdup(dynamic_args); |
| char *next = tmp; |
| char *bword; |
| |
| /* Copy the static arguments */ |
| memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *))); |
| |
| while((bword = strsep(&next, " "))) { |
| arg_ptrs[arg_idx++] = bword; |
| if (arg_idx == SVC_MAXARGS) |
| break; |
| } |
| arg_ptrs[arg_idx] = '\0'; |
| execve(svc->args[0], (char**) arg_ptrs, (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, NULL); |
| 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; |
| char *tmp = NULL; |
| char *args = NULL; |
| |
| if (!strchr(name, ':')) |
| svc = service_find_by_name(name); |
| else { |
| tmp = strdup(name); |
| args = strchr(tmp, ':'); |
| *args = '\0'; |
| args++; |
| |
| svc = service_find_by_name(tmp); |
| } |
| |
| if (svc) { |
| service_start(svc, args); |
| } else { |
| ERROR("no such service '%s'\n", name); |
| } |
| if (tmp) |
| free(tmp); |
| } |
| |
| 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", name); |
| } |
| } |
| |
| 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); |
| } |
| |
| void add_service_keycodes(struct service *svc) |
| { |
| struct input_keychord *keychord; |
| int i, size; |
| |
| if (svc->keycodes) { |
| /* add a new keychord to the list */ |
| size = sizeof(*keychord) + svc->nkeycodes * sizeof(keychord->keycodes[0]); |
| keychords = realloc(keychords, keychords_length + size); |
| if (!keychords) { |
| ERROR("could not allocate keychords\n"); |
| keychords_length = 0; |
| keychords_count = 0; |
| return; |
| } |
| |
| keychord = (struct input_keychord *)((char *)keychords + keychords_length); |
| keychord->version = KEYCHORD_VERSION; |
| keychord->id = keychords_count + 1; |
| keychord->count = svc->nkeycodes; |
| svc->keychord_id = keychord->id; |
| |
| for (i = 0; i < svc->nkeycodes; i++) { |
| keychord->keycodes[i] = svc->keycodes[i]; |
| } |
| keychords_count++; |
| keychords_length += size; |
| } |
| } |
| |
| int open_keychord() |
| { |
| int fd, ret; |
| |
| service_for_each(add_service_keycodes); |
| |
| /* nothing to do if no services require keychords */ |
| if (!keychords) |
| return -1; |
| |
| fd = open("/dev/keychord", O_RDWR); |
| if (fd < 0) { |
| ERROR("could not open /dev/keychord\n"); |
| return fd; |
| } |
| fcntl(fd, F_SETFD, FD_CLOEXEC); |
| |
| ret = write(fd, keychords, keychords_length); |
| if (ret != keychords_length) { |
| ERROR("could not configure /dev/keychord %d (%d)\n", ret, errno); |
| close(fd); |
| fd = -1; |
| } |
| |
| free(keychords); |
| keychords = 0; |
| |
| return fd; |
| } |
| |
| void handle_keychord(int fd) |
| { |
| struct service *svc; |
| int ret; |
| __u16 id; |
| |
| ret = read(fd, &id, sizeof(id)); |
| if (ret != sizeof(id)) { |
| ERROR("could not read keychord id\n"); |
| return; |
| } |
| |
| svc = service_find_by_keychord(id); |
| if (svc) { |
| INFO("starting service %s from keychord\n", svc->name); |
| service_start(svc, NULL); |
| } else { |
| ERROR("service for keychord %d not found\n", id); |
| } |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int device_fd = -1; |
| int property_set_fd = -1; |
| int signal_recv_fd = -1; |
| int keychord_fd = -1; |
| int fd_count; |
| int s[2]; |
| int fd; |
| struct sigaction act; |
| char tmp[PROP_VALUE_MAX]; |
| struct pollfd ufds[4]; |
| char *tmpdev; |
| char* debuggable; |
| |
| 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(); |
| |
| // only listen for keychords if ro.debuggable is true |
| debuggable = property_get("ro.debuggable"); |
| if (debuggable && !strcmp(debuggable, "1")) { |
| keychord_fd = open_keychord(); |
| } |
| |
| 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; |
| fd_count = 3; |
| |
| if (keychord_fd > 0) { |
| ufds[3].fd = keychord_fd; |
| ufds[3].events = POLLIN; |
| fd_count++; |
| } else { |
| ufds[3].events = 0; |
| ufds[3].revents = 0; |
| } |
| |
| #if BOOTCHART |
| bootchart_count = bootchart_init(); |
| if (bootchart_count < 0) { |
| ERROR("bootcharting init failure\n"); |
| } else if (bootchart_count > 0) { |
| NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS); |
| } else { |
| NOTICE("bootcharting ignored\n"); |
| } |
| #endif |
| |
| for(;;) { |
| int nr, i, timeout = -1; |
| |
| for (i = 0; i < fd_count; i++) |
| ufds[i].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, fd_count, 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); |
| if (ufds[3].revents == POLLIN) |
| handle_keychord(keychord_fd); |
| } |
| |
| return 0; |
| } |