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

diff --git a/include/applets.h b/include/applets.h
index 1fb279f..6eb5cfd 100644 (file)
--- a/include/applets.h
+++ b/include/applets.h
@@ -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)

diff --git a/include/usage.h b/include/usage.h
index 61fc3af..71752c7 100644 (file)
--- a/include/usage.h
+++ b/include/usage.h
@@ -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 ...]"

diff --git a/init/Config.in b/init/Config.in
index ba15708..d5af54e 100644 (file)
--- 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 89efdd6..3447974 100644 (file)
--- 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 337d31c..0db3554 100644 (file)
--- 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 (file)
index b79bcd0..0000000
--- 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 (file)
index 5508f0b..0000000
--- 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);
-}