diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Config.in | 55 | ||||
| -rw-r--r-- | init/halt.c | 38 | ||||
| -rw-r--r-- | init/init.c | 17 | ||||
| -rw-r--r-- | init/poweroff.c | 28 | ||||
| -rw-r--r-- | init/reboot.c | 28 |
5 files changed, 56 insertions, 110 deletions
diff --git a/init/Config.in b/init/Config.in index ba157081c..d5af54e47 100644 --- a/init/Config.in +++ b/init/Config.in @@ -12,21 +12,32 @@ 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?" +config CONFIG_FEATURE_INIT_SCTTY + bool " Support running commands with a controlling-tty" + default n + depends on CONFIG_INIT + help + If this option is enabled a command starting with hyphen (-) + is run in its own session (setsid(2)) and possibly with a + controlling tty (TIOCSCTTY). This is not the traditional init + behavour, but is often what you want in an embedded system where + the console is only accessed during development or for maintenance. + +config CONFIG_FEATURE_EXTRA_QUIET + bool " Be _extra_ quiet on boot" default y depends on CONFIG_INIT help - Allow init to be called from an initrd as linuxrc. + 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)?" + bool " Support dumping core for child processes (debugging only)" default n depends on CONFIG_INIT help @@ -35,30 +46,24 @@ config CONFIG_FEATURE_INIT_COREDUMPS 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?" - default n - depends on CONFIG_INIT - help - If this option is enabled a command starting with hyphen (-) - is run in its own session (setsid(2)) and possibly with a - controlling tty (TIOCSCTTY). This is not the traditional init - behavour, but is often what you want in an embedded system where - the console is only accessed during development or for maintenance. -config CONFIG_FEATURE_EXTRA_QUIET - bool " Should init be _extra_ quiet on boot?" + +config CONFIG_FEATURE_INITRD + bool " Support running init from within an initrd (not initramfs)" default y depends on CONFIG_INIT help - Prevent init from logging some messages to the console - during boot. + 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 diff --git a/init/halt.c b/init/halt.c index 89efdd64a..34479742e 100644 --- a/init/halt.c +++ b/init/halt.c @@ -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; + + /* Figure out which applet we're running */ + for(which=0;delay[which]!=*bb_applet_name;which++); - if(bb_getopt_ulflags(argc, argv, "d:", &delay)) { - sleep(atoi(delay)); - } + /* 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]); - return ENABLE_INIT ? kill(1,SIGUSR1) : bb_shutdown_system(RB_HALT_SYSTEM); + if (rc) bb_error_msg("No."); + return rc; } diff --git a/init/init.c b/init/init.c index 337d31c2d..0db355413 100644 --- a/init/init.c +++ b/init/init.c @@ -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 diff --git a/init/poweroff.c b/init/poweroff.c deleted file mode 100644 index b79bcd036..000000000 --- a/init/poweroff.c +++ /dev/null @@ -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); -} diff --git a/init/reboot.c b/init/reboot.c deleted file mode 100644 index 5508f0be9..000000000 --- a/init/reboot.c +++ /dev/null @@ -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); -} |