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Re-add initrd support, unify halt/reboot/poweroff, add -n and -f options.

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This commit is contained in:
Rob Landley 2006-01-30 08:31:37 +00:00
parent 49576c0018
commit 646129163a
7 changed files with 76 additions and 124 deletions
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8
include/applets.h
View File

@ -517,8 +517,8 @@
#ifdef CONFIG_PIVOT_ROOT
APPLET(pivot_root, pivot_root_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_POWEROFF
APPLET(poweroff, poweroff_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
#ifdef CONFIG_HALT
APPLET(poweroff, halt_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_PRINTENV
APPLET(printenv, printenv_main, _BB_DIR_BIN, _BB_SUID_NEVER)
@ -544,8 +544,8 @@
#ifdef CONFIG_REALPATH
APPLET(realpath, realpath_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_REBOOT
APPLET(reboot, reboot_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
#ifdef CONFIG_HALT
APPLET(reboot, halt_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
#endif
#ifdef CONFIG_RENICE
APPLET(renice, renice_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)

20
include/usage.h
View File

@ -1010,11 +1010,13 @@
"-rw-rw-r-- 1 andersen andersen 554058 Apr 14 17:49 /tmp/busybox.tar.gz\n"
#define halt_trivial_usage \
"[-d<delay>]"
"[-d<delay>] [-n<nosync>] [-f<force>]"
#define halt_full_usage \
"Halt the system.\n" \
"Options:\n" \
"\t-d\t\tdelay interval for halting"
"\t-d\t\tdelay interval for halting\n" \
"\t-n\t\tno call to sync()\n" \
"\t-f\t\tforce halt (don't go through init)\n"
#ifdef CONFIG_FEATURE_HDPARM_GET_IDENTITY
#define USAGE_HDPARM_IDENT(a) a
@ -2372,11 +2374,13 @@
"the new root file system."
#define poweroff_trivial_usage \
"[-d<delay>]"
"[-d<delay>] [-n<nosync>] [-f<force>]"
#define poweroff_full_usage \
"Halt the system and request that the kernel shut off the power.\n" \
"Halt and shut off power.\n" \
"Options:\n" \
"\t-d\t\tdelay interval for shutting off"
"\t-d\t\tdelay interval for halting\n" \
"\t-n\t\tno call to sync()\n" \
"\t-f\t\tforce power off (don't go through init)\n"
#define printenv_trivial_usage \
"[VARIABLES...]"
@ -2475,11 +2479,13 @@
"Returns the absolute pathnames of given argument."
#define reboot_trivial_usage \
"[-d<delay>]"
"[-d<delay>] [-n<nosync>] [-f<force>]"
#define reboot_full_usage \
"Reboot the system.\n" \
"Options:\n" \
"\t-d\t\tdelay interval for rebooting"
"\t-d\t\tdelay interval for rebooting\n" \
"\t-n\t\tno call to sync()\n" \
"\t-f\t\tforce reboot (don't go through init)\n"
#define renice_trivial_usage \
"{{-n INCREMENT} | PRIORITY} [[ -p | -g | -u ] ID ...]"

61
init/Config.in
View File

@ -12,31 +12,14 @@ config CONFIG_INIT
init is the first program run when the system boots.
config CONFIG_FEATURE_USE_INITTAB
bool " Support reading an inittab file?"
bool " Support reading an inittab file"
default y
depends on CONFIG_INIT
help
Allow init to read an inittab file when the system boot.
config CONFIG_FEATURE_INITRD
bool " Support running init from within an initrd?"
default y
depends on CONFIG_INIT
help
Allow init to be called from an initrd as linuxrc.
config CONFIG_FEATURE_INIT_COREDUMPS
bool " Support dumping core for child processes (debugging only)?"
default n
depends on CONFIG_INIT
help
If this option is enabled and the file /.init_enable_core
exists, then init will call setrlimit() to allow unlimited
core file sizes. If this option is disabled, processes
will not generate any core files.
config CONFIG_FEATURE_INIT_SCTTY
bool " Support running commands with a controlling-tty?"
bool " Support running commands with a controlling-tty"
default n
depends on CONFIG_INIT
help
@ -47,18 +30,40 @@ config CONFIG_FEATURE_INIT_SCTTY
the console is only accessed during development or for maintenance.
config CONFIG_FEATURE_EXTRA_QUIET
bool " Should init be _extra_ quiet on boot?"
bool " Be _extra_ quiet on boot"
default y
depends on CONFIG_INIT
help
Prevent init from logging some messages to the console
during boot.
Prevent init from logging some messages to the console during boot.
config CONFIG_FEATURE_INIT_COREDUMPS
bool " Support dumping core for child processes (debugging only)"
default n
depends on CONFIG_INIT
help
If this option is enabled and the file /.init_enable_core
exists, then init will call setrlimit() to allow unlimited
core file sizes. If this option is disabled, processes
will not generate any core files.
config CONFIG_FEATURE_INITRD
bool " Support running init from within an initrd (not initramfs)"
default y
depends on CONFIG_INIT
help
Legacy support for running init under the old-style initrd. Allows
the name linuxrc to act as init, and it doesn't assume init is PID 1.
This does not apply to initramfs, which runs /init as PID 1 and
requires no special support.
config CONFIG_HALT
bool "halt"
bool "poweroff, halt, and reboot"
default y
help
Stop all processes and halt the system.
Stop all processes and either halt, reboot, or power off the system.
config CONFIG_MESG
bool "mesg"
@ -67,17 +72,9 @@ config CONFIG_MESG
Mesg controls access to your terminal by others. It is typically
used to allow or disallow other users to write to your terminal
config CONFIG_POWEROFF
bool "poweroff"
default y
help
Stop all processes and (try to) power off the system.
config CONFIG_REBOOT
bool "reboot"
default y
help
Stop all processes and reboot the system.
endmenu

38
init/halt.c
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@ -1,28 +1,42 @@
/* vi: set sw=4 ts=4: */
/*
* Mini halt implementation for busybox
* Poweroff reboot and halt, oh my.
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright 2006 by Rob Landley <rob@landley.net>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <sys/reboot.h>
#include "busybox.h"
#include "init_shared.h"
#include <unistd.h>
extern int halt_main(int argc, char **argv)
int halt_main(int argc, char *argv[])
{
char *delay; /* delay in seconds before rebooting */
char *delay = "hpr";
int which, flags, magic[] = {RB_HALT_SYSTEM, RB_POWER_OFF, RB_AUTOBOOT},
signals[] = {SIGUSR1, SIGUSR2, SIGTERM}, rc = 1;
if(bb_getopt_ulflags(argc, argv, "d:", &delay)) {
sleep(atoi(delay));
}
/* Figure out which applet we're running */
for(which=0;delay[which]!=*bb_applet_name;which++);
return ENABLE_INIT ? kill(1,SIGUSR1) : bb_shutdown_system(RB_HALT_SYSTEM);
/* Parse and handle arguments */
flags = bb_getopt_ulflags(argc, argv, "d:nf", &delay);
if (flags&1) sleep(atoi(delay));
if (!(flags&2)) sync();
/* Perform action. */
if (ENABLE_INIT && !(flags & 4)) {
if (ENABLE_FEATURE_INITRD) {
long *pidlist=find_pid_by_name("linuxrc");
if (*pidlist>0) rc = kill(*pidlist,signals[which]);
if (ENABLE_FEATURE_CLEAN_UP) free(pidlist);
}
if (rc) rc = kill(1,signals[which]);
} else rc = reboot(magic[which]);
if (rc) bb_error_msg("No.");
return rc;
}

17
init/init.c
View File

@ -751,14 +751,7 @@ static void exec_signal(int sig)
static void halt_signal(int sig)
{
shutdown_system();
message(CONSOLE | LOG,
#if #cpu(s390)
/* Seems the s390 console is Wierd(tm). */
"The system is halted. You may reboot now."
#else
"The system is halted. Press Reset or turn off power"
#endif
);
message(CONSOLE | LOG, "The system is halted.");
sync();
/* allow time for last message to reach serial console */
@ -1024,11 +1017,9 @@ extern int init_main(int argc, char **argv)
}
#ifndef DEBUG_INIT
/* Expect to be invoked as init with PID=1 or be invoked as linuxrc */
if (getpid() != 1
#ifdef CONFIG_FEATURE_INITRD
&& strstr(bb_applet_name, "linuxrc") == NULL
#endif
) {
if (getpid() != 1 &&
(!ENABLE_FEATURE_INITRD || !strstr(bb_applet_name, "linuxrc")))
{
bb_show_usage();
}
/* Set up sig handlers -- be sure to

28
init/poweroff.c
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@ -1,28 +0,0 @@
/* vi: set sw=4 ts=4: */
/*
* Mini poweroff implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#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));
}
return ENABLE_INIT ? kill(1,SIGUSR2) : bb_shutdown_system(RB_POWER_OFF);
}

28
init/reboot.c
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@ -1,28 +0,0 @@
/* vi: set sw=4 ts=4: */
/*
* Mini reboot implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#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 reboot_main(int argc, char **argv)
{
char *delay; /* delay in seconds before rebooting */
if(bb_getopt_ulflags(argc, argv, "d:", &delay)) {
sleep(atoi(delay));
}
return ENABLE_INIT ? kill(1,SIGTERM) : bb_shutdown_system(RB_AUTOBOOT);
}