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Support reboot, halt, and poweroff independent of busybox init.

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Simplify and fixup some logic.
 -Erik
This commit is contained in:
Eric Andersen 2003-07-22 09:41:39 +00:00
parent 85e5e72bc1
commit 0246222351
6 changed files with 136 additions and 45 deletions
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9
init/Config.in
View File

@ -27,7 +27,7 @@ config CONFIG_FEATURE_INITRD
config CONFIG_FEATURE_INIT_COREDUMPS
bool " Support dumping core for child processes (debugging only)?"
default y
default n
depends on CONFIG_INIT
help
If this option is enabled and the file /.init_enable_core
@ -43,31 +43,28 @@ config CONFIG_FEATURE_EXTRA_QUIET
Prevent init from logging some messages to the console
during boot.
# Some apps that are meaningless without BusyBox running as init
config CONFIG_HALT
bool "halt"
default y
depends on CONFIG_INIT
help
'halt' tells the kernel to stop all processes and halt the system.
Stop all processes and halt the system.
config CONFIG_POWEROFF
bool "poweroff"
default y
depends on CONFIG_INIT
help
Stop all processes and (try to) power off the system.
config CONFIG_REBOOT
bool "reboot"
default y
depends on CONFIG_INIT
help
Stop all processes and reboot the system.
config CONFIG_MINIT
bool "minit"
default n
depends on ! CONFIG_INIT
help
Minimal init, based on minit v0.9.1. This is a simple
init replacement that handles starting/stopping services,

20
init/halt.c
View File

@ -2,7 +2,6 @@
/*
* Mini halt implementation for busybox
*
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
* Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
*
* This program is free software; you can redistribute it and/or modify
@ -21,12 +20,29 @@
*
*/
#include "busybox.h"
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <sys/reboot.h>
#include "busybox.h"
#include "init_shared.h"
extern int halt_main(int argc, char **argv)
{
char *delay; /* delay in seconds before rebooting */
if(bb_getopt_ulflags(argc, argv, "d:", &delay)) {
sleep(atoi(delay));
}
#ifndef CONFIG_INIT
#ifndef RB_HALT_SYSTEM
#define RB_HALT_SYSTEM 0xcdef0123
#endif
return(bb_shutdown_system(RB_HALT_SYSTEM));
#else
return kill_init(SIGUSR1);
#endif
}

81
init/init_shared.c
View File

@ -1,9 +1,35 @@
/* vi: set sw=4 ts=4: */
/*
* Stuff shared between init, reboot, halt, and poweroff
*
* Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <sys/reboot.h>
#include <sys/reboot.h>
#include <sys/syslog.h>
#include "busybox.h"
#include "init_shared.h"
extern int kill_init(int sig)
{
#ifdef CONFIG_FEATURE_INITRD
@ -19,3 +45,54 @@ extern int kill_init(int sig)
return(kill(1, sig));
#endif
}
#ifndef CONFIG_INIT
#define LOG 0x1
#define CONSOLE 0x2
extern int bb_shutdown_system(unsigned long magic)
{
int pri = LOG_KERN|LOG_NOTICE|LOG_FACMASK;
char *message;
/* Don't kill ourself */
signal(SIGTERM,SIG_IGN);
signal(SIGHUP,SIG_IGN);
setpgrp();
/* Allow Ctrl-Alt-Del to reboot system. */
#ifndef RB_ENABLE_CAD
#define RB_ENABLE_CAD 0x89abcdef
#endif
reboot(RB_ENABLE_CAD);
openlog("shutdown", 0, pri);
message = "\n\rThe system is going down NOW !!\n";
syslog(pri, "%s", message);
fprintf(stdout, "%s", message);
sync();
/* Send signals to every process _except_ pid 1 */
message = "\rSending SIGTERM to all processes.\n";
syslog(pri, "%s", message);
fprintf(stdout, "%s", message);
kill(-1, SIGTERM);
sleep(1);
sync();
message = "\rSending SIGKILL to all processes.\n";
syslog(pri, "%s", message);
fprintf(stdout, "%s", message);
kill(-1, SIGKILL);
sleep(1);
sync();
reboot(magic);
return 0; /* Shrug */
}
#endif

2
init/init_shared.h
View File

@ -1 +1,3 @@
extern int kill_init(int sig);
extern int bb_shutdown_system(unsigned long magic);

30
init/poweroff.c
View File

@ -2,7 +2,6 @@
/*
* Mini poweroff implementation for busybox
*
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
* Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
*
* This program is free software; you can redistribute it and/or modify
@ -21,10 +20,37 @@
*
*/
#include "busybox.h"
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <sys/reboot.h>
#include "busybox.h"
#include "init_shared.h"
extern int poweroff_main(int argc, char **argv)
{
char *delay; /* delay in seconds before rebooting */
if(bb_getopt_ulflags(argc, argv, "d:", &delay)) {
sleep(atoi(delay));
}
#ifndef CONFIG_INIT
#ifndef RB_POWER_OFF
#define RB_POWER_OFF 0x4321fedc
#endif
return(bb_shutdown_system(RB_POWER_OFF));
#else
return kill_init(SIGUSR2);
#endif
}
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/

39
init/reboot.c
View File

@ -2,7 +2,6 @@
/*
* Mini reboot implementation for busybox
*
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
* Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
*
* This program is free software; you can redistribute it and/or modify
@ -30,11 +29,6 @@
#include "init_shared.h"
#ifndef RB_ENABLE_CAD
static const int RB_ENABLE_CAD = 0x89abcdef;
static const int RB_AUTOBOOT = 0x01234567;
#endif
extern int reboot_main(int argc, char **argv)
{
char *delay; /* delay in seconds before rebooting */
@ -43,34 +37,13 @@ extern int reboot_main(int argc, char **argv)
sleep(atoi(delay));
}
#ifdef CONFIG_USER_INIT
/* Don't kill ourself */
signal(SIGTERM,SIG_IGN);
signal(SIGHUP,SIG_IGN);
setpgrp();
/* Allow Ctrl-Alt-Del to reboot system. */
reboot(RB_ENABLE_CAD);
message(CONSOLE|LOG, "\n\rThe system is going down NOW !!\n");
sync();
/* Send signals to every process _except_ pid 1 */
message(CONSOLE|LOG, "\rSending SIGTERM to all processes.\n");
kill(-1, SIGTERM);
sleep(1);
sync();
message(CONSOLE|LOG, "\rSending SIGKILL to all processes.\n");
kill(-1, SIGKILL);
sleep(1);
sync();
reboot(RB_AUTOBOOT);
return 0; /* Shrug */
#ifndef CONFIG_INIT
#ifndef RB_AUTOBOOT
#define RB_AUTOBOOT 0x01234567
#endif
return(bb_shutdown_system(RB_AUTOBOOT));
#else
return kill_init(SIGTERM);
return kill_init(SIGUSR2);
#endif
}