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init: stop doing silly things with the console (-400 bytes)

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init_shared.[ch]: unused, thus deleted
This commit is contained in:
Denis Vlasenko 2007-02-21 00:15:20 +00:00
parent a624c11d5e
commit 7a2ca5e111
4 changed files with 131 additions and 292 deletions
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2
init/Kbuild
View File

@ -8,5 +8,3 @@ lib-y:=
lib-$(CONFIG_HALT) += halt.o
lib-$(CONFIG_INIT) += init.o
lib-$(CONFIG_MESG) += mesg.o
lib-$(CONFIG_INIT) += init_shared.o
lib-$(CONFIG_HALT) += init_shared.o

348
init/init.c
View File

@ -16,44 +16,13 @@
#include <sys/wait.h>
#include <sys/reboot.h>
#include "init_shared.h"
#if ENABLE_SYSLOGD
# include <sys/syslog.h>
#endif
#define INIT_BUFFS_SIZE 256
/* From <linux/vt.h> */
struct vt_stat {
unsigned short v_active; /* active vt */
unsigned short v_signal; /* signal to send */
unsigned short v_state; /* vt bitmask */
};
enum { VT_GETSTATE = 0x5603 }; /* get global vt state info */
/* From <linux/serial.h> */
struct serial_struct {
int type;
int line;
unsigned int port;
int irq;
int flags;
int xmit_fifo_size;
int custom_divisor;
int baud_base;
unsigned short close_delay;
char io_type;
char reserved_char[1];
int hub6;
unsigned short closing_wait; /* time to wait before closing */
unsigned short closing_wait2; /* no longer used... */
unsigned char *iomem_base;
unsigned short iomem_reg_shift;
unsigned int port_high;
unsigned long iomap_base; /* cookie passed into ioremap */
int reserved[1];
};
#define CONSOLE_NAME_SIZE 32
#define MAXENV 16 /* Number of env. vars */
#ifndef _PATH_STDPATH
#define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
@ -75,10 +44,6 @@ struct serial_struct {
#define INIT_SCRIPT "/etc/init.d/rcS" /* Default sysinit script. */
#endif
#define MAXENV 16 /* Number of env. vars */
#define CONSOLE_BUFF_SIZE 32
/* Allowed init action types */
#define SYSINIT 0x001
#define RESPAWN 0x002
@ -109,16 +74,15 @@ static const struct init_action_type actions[] = {
/* Set up a linked list of init_actions, to be read from inittab */
struct init_action {
pid_t pid;
char command[INIT_BUFFS_SIZE];
char terminal[CONSOLE_BUFF_SIZE];
struct init_action *next;
int action;
pid_t pid;
char command[INIT_BUFFS_SIZE];
char terminal[CONSOLE_NAME_SIZE];
};
/* Static variables */
static struct init_action *init_action_list = NULL;
static char console_name[CONSOLE_BUFF_SIZE] = DEV_CONSOLE;
#if !ENABLE_SYSLOGD
static const char *log_console = VC_5;
@ -180,68 +144,60 @@ static void message(int device, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
static void message(int device, const char *fmt, ...)
{
va_list arguments;
int l;
RESERVE_CONFIG_BUFFER(msg, 1024);
#if !ENABLE_SYSLOGD
static int log_fd = -1;
#endif
va_list arguments;
int l;
char msg[128];
msg[0] = '\r';
va_start(arguments, fmt);
l = vsnprintf(msg + 1, 1024 - 2, fmt, arguments) + 1;
va_start(arguments, fmt);
vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments);
va_end(arguments);
msg[sizeof(msg) - 2] = '\0';
l = strlen(msg);
#if ENABLE_SYSLOGD
/* Log the message to syslogd */
if (device & L_LOG) {
/* don`t out "\r\n" */
/* don't out "\r" */
openlog(applet_name, 0, LOG_DAEMON);
syslog(LOG_INFO, "%s", msg + 1);
syslog(LOG_INFO, "init: %s", msg + 1);
closelog();
}
msg[l++] = '\n';
msg[l] = 0;
msg[l] = '\0';
#else
msg[l++] = '\n';
msg[l] = 0;
msg[l] = '\0';
/* Take full control of the log tty, and never close it.
* It's mine, all mine! Muhahahaha! */
if (log_fd < 0) {
log_fd = device_open(log_console, O_WRONLY | O_NONBLOCK | O_NOCTTY);
if (log_fd < 0) {
log_fd = -2;
bb_error_msg("bummer, can't log to %s!", log_console);
device = L_CONSOLE;
if (!log_console) {
log_fd = 2;
} else {
fcntl(log_fd, F_SETFD, FD_CLOEXEC);
log_fd = device_open(log_console, O_WRONLY | O_NONBLOCK | O_NOCTTY);
if (log_fd < 0) {
bb_error_msg("can't log to %s", log_console);
device = L_CONSOLE;
} else {
fcntl(log_fd, F_SETFD, FD_CLOEXEC);
}
}
}
if (device & L_LOG) {
full_write(log_fd, msg, l);
if (log_fd == 2)
return; /* don't print dup messages */
}
#endif
if (device & L_CONSOLE) {
int fd = device_open(DEV_CONSOLE,
O_WRONLY | O_NOCTTY | O_NONBLOCK);
/* Always send console messages to /dev/console so people will see them. */
if (fd >= 0) {
full_write(fd, msg, l);
close(fd);
#if ENABLE_DEBUG_INIT
/* all descriptors may be closed */
} else {
bb_error_msg("bummer, can't print: ");
va_start(arguments, fmt);
vfprintf(stderr, fmt, arguments);
va_end(arguments);
#endif
}
/* Send console messages to console so people will see them. */
full_write(2, msg, l);
}
RELEASE_CONFIG_BUFFER(msg);
}
/* Set terminal settings to reasonable defaults */
@ -268,7 +224,6 @@ static void set_term(void)
tty.c_cflag &= CBAUD | CBAUDEX | CSIZE | CSTOPB | PARENB | PARODD;
tty.c_cflag |= CREAD | HUPCL | CLOCAL;
/* input modes */
tty.c_iflag = ICRNL | IXON | IXOFF;
@ -282,60 +237,59 @@ static void set_term(void)
tcsetattr(STDIN_FILENO, TCSANOW, &tty);
}
/* From <linux/serial.h> */
struct serial_struct {
int type;
int line;
unsigned int port;
int irq;
int flags;
int xmit_fifo_size;
int custom_divisor;
int baud_base;
unsigned short close_delay;
char io_type;
char reserved_char[1];
int hub6;
unsigned short closing_wait; /* time to wait before closing */
unsigned short closing_wait2; /* no longer used... */
unsigned char *iomem_base;
unsigned short iomem_reg_shift;
unsigned int port_high;
unsigned long iomap_base; /* cookie passed into ioremap */
int reserved[1];
/* Paranoia (imagine 64bit kernel overwriting 32bit userspace stack) */
uint32_t bbox_reserved[16];
};
static void console_init(void)
{
int fd;
int tried = 0;
struct vt_stat vt;
struct serial_struct sr;
char *s;
if ((s = getenv("CONSOLE")) != NULL || (s = getenv("console")) != NULL) {
safe_strncpy(console_name, s, sizeof(console_name));
} else {
/* 2.2 kernels: identify the real console backend and try to use it */
if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
/* this is a serial console */
snprintf(console_name, sizeof(console_name) - 1, SC_FORMAT, sr.line);
} else if (ioctl(0, VT_GETSTATE, &vt) == 0) {
/* this is linux virtual tty */
snprintf(console_name, sizeof(console_name) - 1, VC_FORMAT, vt.v_active);
} else {
strcpy(console_name, DEV_CONSOLE);
tried++;
s = getenv("CONSOLE");
if (!s) s = getenv("console");
if (s) {
int fd = open(s, O_RDWR | O_NONBLOCK | O_NOCTTY);
if (fd >= 0) {
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
while (fd > 2) close(fd--);
}
messageD(L_LOG, "console='%s'", s);
}
while ((fd = open(console_name, O_RDONLY | O_NONBLOCK)) < 0 && tried < 2) {
/* Can't open selected console -- try
logical system console and VT_MASTER */
strcpy(console_name, (tried == 0 ? DEV_CONSOLE : CURRENT_VC));
tried++;
}
if (fd < 0) {
/* Perhaps we should panic here? */
s = getenv("TERM");
if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
/* Force the TERM setting to vt102 for serial console --
* if TERM is set to linux (the default) */
if (!s || strcmp(s, "linux") == 0)
putenv((char*)"TERM=vt102");
#if !ENABLE_SYSLOGD
log_console =
log_console = NULL;
#endif
strcpy(console_name, bb_dev_null);
} else {
s = getenv("TERM");
/* check for serial console */
if (ioctl(fd, TIOCGSERIAL, &sr) == 0) {
/* Force the TERM setting to vt102 for serial console --
* if TERM is set to linux (the default) */
if (s == NULL || strcmp(s, "linux") == 0)
putenv((char*)"TERM=vt102");
#if !ENABLE_SYSLOGD
log_console = console_name;
#endif
} else {
if (s == NULL)
putenv((char*)"TERM=linux");
}
close(fd);
}
messageD(L_LOG, "console=%s", console_name);
} else if (!s)
putenv((char*)"TERM=linux");
}
static void fixup_argv(int argc, char **argv, const char *new_argv0)
@ -355,24 +309,29 @@ static void fixup_argv(int argc, char **argv, const char *new_argv0)
}
/* Open the new terminal device */
static void open_new_terminal(const char* device, int fail) {
struct stat sb;
if ((device_open(device, O_RDWR)) < 0) {
if (stat(device, &sb) != 0) {
message(L_LOG | L_CONSOLE, "device '%s' does not exist", device);
} else {
message(L_LOG | L_CONSOLE, "Bummer, can't open %s", device);
}
if (fail)
_exit(1);
/* else */
static void open_stdio_to_tty(const char* tty_name, int fail)
{
/* empty tty_name means "use init's tty", else... */
if (tty_name[0]) {
close(0);
if ((device_open(tty_name, O_RDWR)) < 0) {
dup2(1, 0); /* restore fd #0 - avoid nasty surprises */
message(L_LOG | L_CONSOLE, "can't open %s: %s",
tty_name, strerror(errno));
if (fail)
_exit(1);
#if !ENABLE_DEBUG_INIT
shutdown_signal(SIGUSR1);
shutdown_signal(SIGUSR1);
#else
_exit(2);
_exit(2);
#endif
}
}
close(1);
close(2);
set_term();
dup(0);
dup(0);
}
static pid_t run(const struct init_action *a)
@ -395,11 +354,7 @@ static pid_t run(const struct init_action *a)
sigprocmask(SIG_BLOCK, &nmask, &omask);
if ((pid = fork()) == 0) {
/* Clean up */
close(0);
close(1);
close(2);
sigprocmask(SIG_SETMASK, &omask, NULL);
/* Reset signal handlers that were set by the parent process */
@ -418,14 +373,7 @@ static pid_t run(const struct init_action *a)
setsid();
/* Open the new terminal device */
open_new_terminal(a->terminal, 1);
/* Make sure the terminal will act fairly normal for us */
set_term();
/* Setup stdout, stderr for the new process so
* they point to the supplied terminal */
dup(0);
dup(0);
open_stdio_to_tty(a->terminal, 1);
/* If the init Action requires us to wait, then force the
* supplied terminal to be the controlling tty. */
@ -433,7 +381,7 @@ static pid_t run(const struct init_action *a)
/* Now fork off another process to just hang around */
if ((pid = fork()) < 0) {
message(L_LOG | L_CONSOLE, "Can't fork!");
message(L_LOG | L_CONSOLE, "can't fork");
_exit(1);
}
@ -452,7 +400,7 @@ static pid_t run(const struct init_action *a)
/* Use a temporary process to steal the controlling tty. */
if ((pid = fork()) < 0) {
message(L_LOG | L_CONSOLE, "Can't fork!");
message(L_LOG | L_CONSOLE, "can't fork");
_exit(1);
}
if (pid == 0) {
@ -489,14 +437,12 @@ static pid_t run(const struct init_action *a)
cmdpath = cmd[0];
/*
Interactive shells want to see a dash in argv[0]. This
typically is handled by login, argv will be setup this
way if a dash appears at the front of the command path
(like "-/bin/sh").
* Interactive shells want to see a dash in argv[0]. This
* typically is handled by login, argv will be setup this
* way if a dash appears at the front of the command path
* (like "-/bin/sh").
*/
if (*cmdpath == '-') {
/* skip over the dash */
++cmdpath;
@ -515,8 +461,8 @@ static pid_t run(const struct init_action *a)
/* Establish this process as session leader and
* (attempt) to make the tty (if any) a controlling tty.
*/
(void) setsid();
(void) ioctl(0, TIOCSCTTY, 0/*don't steal it*/);
setsid();
ioctl(0, TIOCSCTTY, 0 /*don't steal it*/);
#endif
}
@ -532,7 +478,7 @@ static pid_t run(const struct init_action *a)
* specifies.
*/
messageD(L_LOG, "Waiting for enter to start '%s'"
"(pid %d, terminal %s)\n",
"(pid %d, tty '%s')\n",
cmdpath, getpid(), a->terminal);
full_write(1, press_enter, sizeof(press_enter) - 1);
while (read(0, &c, 1) == 1 && c != '\n')
@ -541,7 +487,7 @@ static pid_t run(const struct init_action *a)
#endif
/* Log the process name and args */
message(L_LOG, "Starting pid %d, console %s: '%s'",
message(L_LOG, "starting pid %d, tty '%s': '%s'",
getpid(), a->terminal, cmdpath);
#if ENABLE_FEATURE_INIT_COREDUMPS
@ -562,7 +508,8 @@ static pid_t run(const struct init_action *a)
BB_EXECVP(cmdpath, cmd);
/* We're still here? Some error happened. */
message(L_LOG | L_CONSOLE, "Bummer, cannot run '%s': %m", cmdpath);
message(L_LOG | L_CONSOLE, "Cannot run '%s': %s",
cmdpath, strerror(errno));
_exit(-1);
}
sigprocmask(SIG_SETMASK, &omask, NULL);
@ -597,7 +544,8 @@ static void run_actions(int action)
for (a = init_action_list; a; a = tmp) {
tmp = a->next;
if (a->action == action) {
if (access(a->terminal, R_OK | W_OK)) {
/* a->terminal of "" means "init's console" */
if (a->terminal[0] && access(a->terminal, R_OK | W_OK)) {
delete_init_action(a);
} else if (a->action & (SYSINIT | WAIT | CTRLALTDEL | SHUTDOWN | RESTART)) {
waitfor(a, 0);
@ -654,23 +602,21 @@ static void shutdown_system(void)
sigaddset(&block_signals, SIGTSTP);
sigprocmask(SIG_BLOCK, &block_signals, NULL);
message(L_CONSOLE | L_LOG, "The system is going down NOW!");
/* Allow Ctrl-Alt-Del to reboot system. */
init_reboot(RB_ENABLE_CAD);
message(L_CONSOLE | L_LOG, "The system is going down NOW !!");
sync();
/* Send signals to every process _except_ pid 1 */
message(L_CONSOLE | L_LOG, init_sending_format, "TERM");
message(L_CONSOLE | L_LOG, "Sending SIG%s to all processes", "TERM");
kill(-1, SIGTERM);
sleep(1);
sync();
sleep(1);
message(L_CONSOLE | L_LOG, init_sending_format, "KILL");
message(L_CONSOLE | L_LOG, "Sending SIG%s to all processes", "KILL");
kill(-1, SIGKILL);
sleep(1);
sync();
sleep(1);
}
static void exec_signal(int sig ATTRIBUTE_UNUSED)
@ -697,26 +643,14 @@ static void exec_signal(int sig ATTRIBUTE_UNUSED)
sigaddset(&unblock_signals, SIGTSTP);
sigprocmask(SIG_UNBLOCK, &unblock_signals, NULL);
/* Close whatever files are open. */
close(0);
close(1);
close(2);
/* Open the new terminal device */
open_new_terminal(a->terminal, 0);
/* Make sure the terminal will act fairly normal for us */
set_term();
/* Setup stdout, stderr on the supplied terminal */
dup(0);
dup(0);
open_stdio_to_tty(a->terminal, 0);
messageD(L_CONSOLE | L_LOG, "Trying to re-exec %s", a->command);
BB_EXECLP(a->command, a->command, NULL);
message(L_CONSOLE | L_LOG, "exec of '%s' failed: %m",
a->command);
sync();
message(L_CONSOLE | L_LOG, "Cannot run '%s': %s",
a->command, strerror(errno));
sleep(2);
init_reboot(RB_HALT_SYSTEM);
loop_forever();
@ -741,11 +675,8 @@ static void shutdown_signal(int sig)
rb = RB_POWER_OFF;
}
message(L_CONSOLE | L_LOG, "Requesting system %s", m);
sync();
/* allow time for last message to reach serial console */
sleep(2);
init_reboot(rb);
loop_forever();
}
@ -779,14 +710,9 @@ static void new_init_action(int action, const char *command, const char *cons)
{
struct init_action *new_action, *a, *last;
if (*cons == '\0')
cons = console_name;
if (strcmp(cons, bb_dev_null) == 0 && (action & ASKFIRST))
return;
new_action = xzalloc(sizeof(struct init_action));
/* Append to the end of the list */
for (a = last = init_action_list; a; a = a->next) {
/* don't enter action if it's already in the list,
@ -795,11 +721,12 @@ static void new_init_action(int action, const char *command, const char *cons)
&& (strcmp(a->terminal, cons) == 0)
) {
a->action = action;
free(new_action);
return;
}
last = a;
}
new_action = xzalloc(sizeof(struct init_action));
if (last) {
last->next = new_action;
} else {
@ -808,7 +735,7 @@ static void new_init_action(int action, const char *command, const char *cons)
strcpy(new_action->command, command);
new_action->action = action;
strcpy(new_action->terminal, cons);
messageD(L_LOG | L_CONSOLE, "command='%s' action='%d' terminal='%s'\n",
messageD(L_LOG | L_CONSOLE, "command='%s' action=%d tty='%s'\n",
new_action->command, new_action->action, new_action->terminal);
}
@ -841,11 +768,10 @@ static void parse_inittab(void)
#if ENABLE_FEATURE_USE_INITTAB
FILE *file;
char buf[INIT_BUFFS_SIZE], lineAsRead[INIT_BUFFS_SIZE];
char tmpConsole[CONSOLE_BUFF_SIZE];
char tmpConsole[CONSOLE_NAME_SIZE];
char *id, *runlev, *action, *command, *eol;
const struct init_action_type *a = actions;
file = fopen(INITTAB, "r");
if (file == NULL) {
/* No inittab file -- set up some default behavior */
@ -925,7 +851,7 @@ static void parse_inittab(void)
id += 5;
strcpy(tmpConsole, "/dev/");
safe_strncpy(tmpConsole + 5, id,
CONSOLE_BUFF_SIZE - 5);
sizeof(tmpConsole) - 5);
id = tmpConsole;
}
new_init_action(a->action, command, id);
@ -938,7 +864,6 @@ static void parse_inittab(void)
}
}
fclose(file);
return;
#endif /* FEATURE_USE_INITTAB */
}
@ -947,7 +872,7 @@ static void reload_signal(int sig ATTRIBUTE_UNUSED)
{
struct init_action *a, *tmp;
message(L_LOG, "Reloading /etc/inittab");
message(L_LOG, "reloading /etc/inittab");
/* disable old entrys */
for (a = init_action_list; a; a = a->next ) {
@ -965,7 +890,6 @@ static void reload_signal(int sig ATTRIBUTE_UNUSED)
}
}
run_actions(RESPAWN);
return;
}
#endif /* FEATURE_USE_INITTAB */
@ -978,13 +902,13 @@ int init_main(int argc, char **argv)
die_sleep = 30 * 24*60*60; /* if xmalloc will ever die... */
if (argc > 1 && !strcmp(argv[1], "-q")) {
return kill(1,SIGHUP);
return kill(1, SIGHUP);
}
#if !ENABLE_DEBUG_INIT
/* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
if (getpid() != 1 &&
(!ENABLE_FEATURE_INITRD || !strstr(applet_name, "linuxrc")))
{
if (getpid() != 1
&& (!ENABLE_FEATURE_INITRD || !strstr(applet_name, "linuxrc"))
) {
bb_show_usage();
}
/* Set up sig handlers -- be sure to
@ -1006,17 +930,7 @@ int init_main(int argc, char **argv)
/* Figure out where the default console should be */
console_init();
/* Close whatever files are open, and reset the console. */
close(0);
close(1);
close(2);
if (device_open(console_name, O_RDWR | O_NOCTTY) == 0) {
set_term();
close(0);
}
set_term();
chdir("/");
setsid();
{
@ -1029,7 +943,7 @@ int init_main(int argc, char **argv)
if (argc > 1) setenv("RUNLEVEL", argv[1], 1);
/* Hello world */
message(MAYBE_CONSOLE | L_LOG, "init started: %s", bb_msg_full_version);
message(MAYBE_CONSOLE | L_LOG, "init started: %s", bb_msg_full_version);
/* Make sure there is enough memory to do something useful. */
if (ENABLE_SWAPONOFF) {
@ -1038,7 +952,7 @@ int init_main(int argc, char **argv)
if (!sysinfo(&info) &&
(info.mem_unit ? : 1) * (long long)info.totalram < 1024*1024)
{
message(L_CONSOLE, "Low memory: forcing swapon.");
message(L_CONSOLE, "Low memory, forcing swapon");
/* swapon -a requires /proc typically */
new_init_action(SYSINIT, "mount -t proc proc /proc", "");
/* Try to turn on swap */
@ -1073,7 +987,7 @@ int init_main(int argc, char **argv)
} else if (enforce > 0) {
/* SELinux in enforcing mode but load_policy failed */
/* At this point, we probably can't open /dev/console, so log() won't work */
message(CONSOLE,"Unable to load SELinux Policy. Machine is in enforcing mode. Halting now.");
message(CONSOLE, "Cannot load SELinux Policy. Machine is in enforcing mode. Halting now.");
exit(1);
}
}
@ -1121,7 +1035,7 @@ int init_main(int argc, char **argv)
/* Set the pid to 0 so that the process gets
* restarted by run_actions() */
a->pid = 0;
message(L_LOG, "Process '%s' (pid %d) exited. "
message(L_LOG, "process '%s' (pid %d) exited. "
"Scheduling it for restart.",
a->command, wpid);
}

63
init/init_shared.c
View File

@ -1,63 +0,0 @@
/* vi: set sw=4 ts=4: */
/*
* Stuff shared between init, reboot, halt, and poweroff
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
*/
#include "busybox.h"
#include <sys/reboot.h>
#include <sys/syslog.h>
#include "init_shared.h"
const char * const init_sending_format = "Sending SIG%s to all processes.";
#ifndef CONFIG_INIT
const char * const bb_shutdown_format = "\r%s\n";
int bb_shutdown_system(unsigned long magic)
{
int pri = LOG_KERN|LOG_NOTICE|LOG_FACMASK;
const char *message;
/* Don't kill ourself */
signal(SIGTERM,SIG_IGN);
signal(SIGHUP,SIG_IGN);
bb_setpgrp;
/* Allow Ctrl-Alt-Del to reboot system. */
#ifndef RB_ENABLE_CAD
#define RB_ENABLE_CAD 0x89abcdef
#endif
reboot(RB_ENABLE_CAD);
openlog(applet_name, 0, pri);
message = "\nThe system is going down NOW !!";
syslog(pri, "%s", message);
printf(bb_shutdown_format, message);
sync();
/* Send signals to every process _except_ pid 1 */
message = "TERM";
syslog(pri, init_sending_format, message);
printf(bb_shutdown_format, message);
kill(-1, SIGTERM);
sleep(1);
sync();
message = "KILL";
syslog(pri, init_sending_format, message);
printf(bb_shutdown_format, message);
kill(-1, SIGKILL);
sleep(1);
sync();
reboot(magic);
return 0; /* Shrug */
}
#endif

10
init/init_shared.h
View File

@ -1,10 +0,0 @@
/* vi: set sw=4 ts=4: */
/*
* Helper functions shared by init et al.
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
extern int kill_init(int sig);
extern int bb_shutdown_system(unsigned long magic);
extern const char * const init_sending_format;