emulate suspend and close (and save the game progress) without home menu

[john-peterson]

apps get a smooth start but a rough end akin to pulling the plug. there is no graceful exit. luckily most games save occasionally during gameplay but not all

I found a game that only save on exit called shifting worlds by Anthony Lavelle . despite a message about in game saves he never implement it. I almost solved it but need some help with the last step

0xc trigger the save but only when suspended by the home menu. no combination of signals works with out the home menu so far so it's time to ask you for help

build everything and test

run my sig branch john-peterson/azahar@sig from the terminal it listens to getchar

get home menu and shifting worlds product code CTR-N-HMMP and CTR-P-ASZP

cmake -B out -DCMAKE_BUILD_TYPE=Debug  -DENABLE_QT_TRANSLATION=OFF -DENABLE_ROOM=OFF -DUSE_DISCORD_PRESENCE=OFF -DENABLE_QT=OFF -DENABLE_TESTS=OFF -DENABLE_WEB_SERVICE=OFF -DENABLE_SCRIPTING=OFF -DENABLE_CUBEB=OFF -DENABLE_LIBUSB=OFF -DENABLE_OPENGL=OFF -DENABLE_VULKAN=ON -DENABLE_SDL2_FRONTEND=ON -DUSE_SYSTEM_SDL2=ON -DUSE_SYSTEM_BOOST=ON
make -j8 -C out && out/bin/Release/azahar -n home.app

remove all other games

press a when the music start to launch the game

press b when you see the save file shift_3ds.bin and the game music start

press C to simulate close or z to let the home menu close

you should observe this game logic from start to finish

signal 1
music start read save file
fs_user/savedata_archive

b home button
SaveData.dat Service.FS OpenFile

press c in test build
order to close id=101 pos=2
sending C from 101 to 300
signal
glance id=300
SendDeliverArg
 ReceiveParameter from 101 to 300

*** saving *** <- the goal is to reach this function

 prepare to close target=2
sending A from 101 to 300

this is the best log filter to show save file access and the app manager

log_filter = *:Critical Service:Trace Service.APT:Trace Service.SRV:Trace Service.FS:Trace Common.Filesystem:Trace

test app

instead of the game you can use my signal demo john-peterson/3ds-examples@sig

git remote add jsp https://github.com/john-peterson/3ds-examples
git fetch jsp sig

I essentially get the events 0xc and 0x10 but I want all events and more complete example

tail -f ~/.local/share/azahar-emu/sdmc/log
_aptDebug(2,c)
_aptDebug(22,0)

this is from libctru

APTCMD_WAKEUP_CANCEL      = 12, ///< Applet wakes up due to being cancelled.
APTCMD_SYSAPPLET_REQUEST  = 16, ///< Request for sysapplet (?).

message me on Google chat if you are interested in this and made some progress

other projects restore fast file access in android

I am also going to restore the normal Linux file access in android with

  <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />

it is ten times faster than android file access. it is so slow it reminds me of my 24 meg Pentium 90 from 1995. loading a save in Zelda takes over a minute.  it should take ten seconds