A patch from Matt Kraai that adds a new 'shutdown' action to busybox init. Now

you can specify an arbitrary behavior for 'ctrlaltdel' without that behavior
needing to be a reboot.

1 files changed, 15 insertions, 6 deletions

diff --git a/usage.h b/usage.h
index 1ee2ab328..aa7f0af22 100644
--- a/usage.h
+++ b/usage.h
@@ -663,10 +663,15 @@
 "\n" \
 "       ::sysinit:/etc/init.d/rcS\n" \
 "       ::askfirst:/bin/sh\n" \
+"       ::ctrlaltdel:/sbin/reboot\n" \
+"       ::shutdown:/sbin/swapoff -a\n" \
+"       ::shutdown:/bin/umount -a -r\n" \
 "\n" \
 "if it detects that /dev/console is _not_ a serial console, it will also run:\n" \
 "\n" \
 "       tty2::askfirst:/bin/sh\n" \
+"       tty3::askfirst:/bin/sh\n" \
+"       tty4::askfirst:/bin/sh\n" \
 "\n" \
 "If you choose to use an /etc/inittab file, the inittab entry format is as follows:\n" \
 "\n" \
@@ -692,7 +697,7 @@
 "       <action>: \n" \
 "\n" \
 "               Valid actions include: sysinit, respawn, askfirst, wait, \n" \
-"               once, and ctrlaltdel.\n" \
+"               once, ctrlaltdel, and shutdown.\n" \
 "\n" \
 "               The available actions can be classified into two groups: actions\n" \
 "               that are run only once, and actions that are re-run when the specified\n" \
@@ -706,9 +711,12 @@
 "                       'wait' actions, like  'sysinit' actions, cause init to wait until\n" \
 "                       the specified task completes.  'once' actions are asyncronous,\n" \
 "                       therefore, init does not wait for them to complete.  'ctrlaltdel'\n" \
-"                       actions are run immediately before init causes the system to reboot\n" \
-"                       (unmounting filesystems with a 'ctrlaltdel' action is a very good\n" \
-"                       idea).\n" \
+"                       actions are run when the system detects that someone on the system\n" \
+"                       console has pressed the CTRL-ALT-DEL key combination.  Typically one\n" \
+"                       wants to run 'reboot' at this point to cause the system to reboot.\n" \
+"                       Finally the 'shutdown' action specifies the actions to taken when\n" \
+"                       init is told to reboot.  Unmounting filesystems and disabling swap\n" \
+"                       is a very good here\n" \
 "\n" \
 "               Run repeatedly actions:\n" \
 "\n" \
@@ -759,8 +767,9 @@
 "       #::respawn:/sbin/getty 57600 ttyS2\n" \
 "       \n" \
 "       # Stuff to do before rebooting\n" \
-"       ::ctrlaltdel:/bin/umount -a -r\n" \
-"       ::ctrlaltdel:/sbin/swapoff -a\n"
+"       ::ctrlaltdel:/sbin/reboot\n" \
+"       ::shutdown:/bin/umount -a -r\n" \
+"       ::shutdown:/sbin/swapoff -a\n"
 
 #define insmod_trivial_usage \
         "[OPTION]... MODULE [symbol=value]..."