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Hijack Kernel Feature List

Currently implemented features (non-exhaustive list):
	Auto Volume Adjust
	Break-Out game (for red-lights, and passengers on long drives)
	Button Codes Display (raw, untranslated values)
	Calculator (simple, integers only)
	Countdown Timer (auto on/off, alarm)
	Filesystem Check on Sync:  Enable/Disable
	Font Display
	Force DC/Car Mode
	Vital Signs
	High Temperature Warning
	Knob Press Redefinition (great for in-car, with tons of options)
	Quicktimer feature using the '4' button
	Reboot Machine
	Restore DC/Car Visuals
	Screen Blanker (prevents burn-out after end of playlist)
	Vital Signs
	Long Knob Press (2+ seconds) cycles among input sources
	IR translations for "foreign" remotes in config.ini
	Different translations for long/short presses, Tuner/Aux/Main, shift-lock, etc..
	Initialization keypress macros from config.ini
	Current track information in /proc/empeg_notify
	Built-in FTP and HTTP servers, with resume download capability
	User programmable PopUp menus via ir_translate
	Playlist browsing/streaming/m3u via khttpd
	Popup message when [ir_translate] in config.ini has errors
	Popup message for [hijack] option errors in config.ini
	Intercepts config.ini and edits-in-place for ;@HOME/;@WORK
	Tuner simulation
	Sony Stalk Support: translations to/from stalk codes
The hotlist of features planned for the near future:
	Get "Visual-" to work without a tuner module installed.
Other ideas on the back-burner:
	Display dimming for AC/Home mode.
	Use sys_sendfile() in kftpd/khttpd.
	Write a /proc parser to generically XML-ize some of the info there.
	Tuner-ID detection, used for AC/DC override
	Add "overwrite in place" for ext2 files on r/o filesystem.
	Allow new features based on Sony Stalk codes (eg. --visuals)
	Program launching from menu-items defined in config.ini
	Extreme Low Temperature drive spin-up prevention

Hijack kftpd & khttpd Stuff

Recent stuff of interest includes the new kftpd "SITE" commands: 


The RW command remounts /,/drive0,drive1 for read-write access, and RO puts them back
into read-only. Wait about 5 seconds after issuing them, because they execute

Also new, is the /proc/empeg_kernel "device", created within the kernel by Hijack. This is
simply a block device entry for MAJOR=60 MINOR=8, the "kernel" flasher. If you use FTP to
upload a kernel zImage file to /proc/empeg_kernel then it will be burned to flash during the
FTP. Takes about 5 seconds. 

This is the much faster equivalent to using "download" or "logo editor" to flash a new kernel.
Works fine on a stock consumer image, too, so long as Hijack v124 (or higher) has been

Also recently new, is the ability to write to /proc/empeg_notify. Reading from it just gives the
player status (requires [output]notify=1 in config.ini), but the other direction can be used to
inject commands to Hijack: 

echo "button 20df12" >/proc/empeg_notify (a short press) 
echo "button 20df12.L" >/proc/empeg_notify (a long press) 

This virtual button pressing can be done remotely using FTP to write to those files, as well as
using the FTP SITE EXEC command to issue those "echo" commands shown above. 

In addition to "button" commands, one can also do" 

echo "reboot" >/proc/empeg_notify 

and also for fun you can do: 

echo "popup Hello, World!" >/proc/empeg_notify 

Okay v126 has just been released.

Improvements from v124/v125 include:

-- http dirlist works again (was broken in v125).

-- SITE EXEC is as broken as before.. I think I'll remove it entirely next release, since the enhancements below pretty much eliminate most needs for it.

-- Popup messages are now used as progress indicators for SITE RO and SITE RW commands in ftp.

-- ftp SITE RO and SITE RW are now implemented internal to the kernel, so they will work fine on a consumer image (previously required the developer image).

-- ftp SITE REBOOT command now does "SITE RO" automatically before reboot.  Note that the Hijack Menu "Reboot Machine" does NOT do RO before booting though..

-- ftp SITE BUTTON xxxxxxxx command exists for remote button simulations.  Also works with xxxxxxxx.L to simulate longer presses.

-- ftp SITE SERIAL xxxxxxxx command exists for faking serial port input, useful for playing tunes by #fid.

-- Multiple SITE commands can be issued at once, separated by semi-colons.

-- All of the SITE syntax now also works for echoing commands to /proc/empeg_notify as well as for using HTTP GET commands with parameters for /proc/empeg_notify, as in:


or to play fid #999 on the empeg unit:


-- I have replaced /proc/empeg_screen.tiff with a PNG version called /proc/empeg_screen.png  --- it is still tiny (32x128 pixels), but if we later put an HTML wrapper around it, we can get most browsers to scale it to a viewable size.  I'm hoping somebody writes some HTML to present this screen display along with some buttons that use the parameter syntax (discussed above) to do full remote control.. How about it?  There is also now a /proc/empeg_screen.raw, which is a 2048 screen capture from the empeg's software buffer, 2 pixels per byte. 

Other changes, but I've lost track..


Cool, eh!