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payonel

Developer
  • Content Count

    127
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Everything posted by payonel

  1. payonel

    Computer Halted Error

    this issue has been resolved, please update to our latest release
  2. payonel

    How to add more colors to ls

    if you set LS_COLORS (an environment variable in the shell) it'll use that as a rule for highlighting ls results it is a colon separated list of rules. {TAG}={COLOR}:{TAG}={COLOR}:{TAG}={COLOR} ... etc TAG can be: di for directory fi for file ln for symbolic link TAG can also be a glob rule, like *.lua COLOR is a vt100 color code, "36" for example is the default blue dir color see /etc/profile.lua where it sets the system default for LS_COLORS you can change your current shell env var using `set` like `set LS_COLORS="....."` or you can set it via os.setenv, like I do in the /etc/profile.lua
  3. payonel

    An error report

    please add your modlist to this bug report https://github.com/MightyPirates/OpenComputers/issues/2793
  4. payonel

    An error report

    thanks for reporting, can you copy a list of the mods you are using?
  5. payonel

    Computer Halted Error

    Hi @lukeh990 saw your message in irc. you only stuck around in irc for 7 minutes after you pinged me I hope you give irc and troubleshooting this issue with me more again.
  6. payonel

    Computer Halted Error

    is it a local game? can you zip up your entire minecraft instance of that pack and share a link for me to download? if you dont have a place from which you can share it, I can create a cloud folder. just private message me in irc (oc on esper)
  7. payonel

    Computer Halted Error

    ideally it repros with OC only and all we need is a world tarball. ideally i don't have to use another launcher, but can just drop the world, config, and mods in an mmc instance try copying the world to a new pack that contains OC only, turn off power requirements for oc in the config then start it up and let fml drop all the blocks you've removed support for, test the machines and see if they still fail.
  8. payonel

    Computer Halted Error

    if anyone is able to create a simple repro, with a TINY number of mods, and are able to pack that into a zip, then share that zip with me (here, or in our #oc irc channel) i WILL look into this the problem i have is that this does not repro for me
  9. functions have to have an `end` local event = require("timer") event.timer(2, function() print("do something") end,3)
  10. payonel

    Multithreading in drones

    aye, the threading library is part of openos. without installing it, you've got not thread api My solution to your issue would be to put a timeout on computer.pullSignal. If it times, execute the next pending command (if there is one)
  11. payonel

    Preemptive multitasking and sysyield timeouts

    First of all, if you pull off getting our machines to run without forced cooperative yields....that's just awesome. I'm pretty excited about the work you did with eris already. Secondly, a fixed user-defined __gc solution also sounds very nice, but raises new risks. I would like to suggest we look at these two features separately. Obviously, the gc work coming after. The problem with __gc code is that debug hooks are disabled during __gc code execution. So a user could rob the thread and we'd not be able to yield it. So unless you have found a way to execute gc code WHILE not disabling debug hooks -- this is not something we can have enabled by default. (but still a thing we should fix, as yes, the current implementation is not perfect) Thirdly, At this point, you can make a github issue as a feature request. We'll hold off making a PR until we have all the pieces and scope agreed on. You can also discuss these issues with me in a more real-time medium on our irc channel (esper.net) #oc
  12. payonel

    Preemptive multitasking and sysyield timeouts

    it's a limitation of eris (edit: that is to say, eris is incompatible with hooks)
  13. payonel

    Help understand programming touch screen and setting up gui.

    components send signals, and the screens send touch events. for more signal info read here: https://ocdoc.cil.li/component:signals and you should run `dmesg` on the command line shell, which prints all signals the machine is getting. it can be quite helpful
  14. payonel

    Preemptive multitasking and sysyield timeouts

    I appreciate the study you've put into this. You aren't alone; we also care deeply about these issues. The reason we don't do pre-emptive scheduling actually isn't due to yielding issues from the debug hook (as you've demonstrated) but because we can't persist the lua runtime state in a suspended debug hook. In other words, if the minecraft world chunk were to unload whilst we have a coroutine-in-a-suspended-debug-hook, then upon loading that lua state again (when the chunk loads again), we'd be forced to "stop" the machine. On the other hand, we definitely CAN persist when the root-level coroutine yields back to the machine (which is what you get when you call computer.pullSignal)
  15. payonel

    Event function losing scope?

    I'll try to explain what is happening in the perspective of the lua compiler In this code chunk, we are assigning buildWitherButton.onTouch to a function. powerButton is declared in the local scope previously, and is captured (linked) from the current scope throwWitherBuildError is not declared, and thus no variable is linked. When executing this code, access to this variable will be checked in the global scope, _G. If when this code is executed there is no _G.throwWitherBuildError then it will resolve as nil. clearAndInitProgressBar is declared in the local scope previously, and is captured (linked) from the current scope event is declared in the local scope previously, and is captured (linked) from the current scope buildWitherButton.onTouch = function() if(powerButton.pressed ~= true) then throwWitherBuildError´╗┐("´╗┐Can't build Wither with shield down, are you mad?!?!?") else clearAndInitProgressBar() event.timer(1, progressUpdate, 10) end end Later we see this: local function throwWitherBuildError(text) note.play(30) return GUI.alert(text) end which creates a local function throwWitherBuildError, and it is never used nor linked
  16. payonel

    Event function losing scope?

    btw, if the onTouch callback is made to an event.listern (inside the gui library you are using), which it likely is, then you would see the crash log in /tmp/event.log (it would be crashing because the assert of the 2nd argument is a function and NOT nil)
  17. payonel

    Event function losing scope?

    Looks like your you've declared `progressUpdate` after your used it, thus passing nil to event.timer for its 2nd argument. Which, btw, isn't allowed, it should error (it requires you pass a function there)
  18. payonel

    How to mount filesystem component without OpenOS?

    mounting is a kernel concept that puts a filesystem at a directory path, so you would implement that yourself you'll see signals pertaining to filesystem components as they become available (see computer.pullSignal) the (hardware) component library provides mechanisms to query available components, list methods, invoke methods, create proxies, etc so, assuming filesystem_address is your hardware address for your filesystem component: local fs = component.proxy(filesystem_address)
  19. payonel

    Not enough info in API.

    firstly, always declare your identifiers as local unless you intend to create global variables for use and effect in other scripts. local component = require("component") local printer = component.printer3d secondly, you could iterate the component proxy, it is a table for k, v in pairs(printer) do print(k, type(v)) end or you can use the command line tool, components /home # components and you can list functions and doc details of component using the -l option, and you can filter the components listed specifying a name /home # components -l printer3d
  20. payonel

    /home/.shrc resolution setting and then greeting

    you could add this line to your .shrc /etc/motd
  21. payonel

    More authority over the 'harware'. (OC Developer Request)

    btw, I made a typo (which I'll correct inline), I meant to say that (in regards to memory swapping) we cannot serialize all data types. So for a kernel to really swap memory, it would only be able to swap specific segments of data ... and could not force arbitrary user code to fully swap. It is sadly outside what Lua can do. We kill the the current coroutine that is long running. So you can catch it yourself, in your kernel, without the kernel crashing. This isn't a detail of machine.lua, but rather, how lua hooks work. And yes, I empathize with the challenge of that switch. Strangely I found have found that I enjoy the two contrasting worlds (lua <--> c++).
  22. payonel

    More authority over the 'harware'. (OC Developer Request)

    I appreciate the interest and enthusiasm. I disagree with a few of the points you've made if you would allow me to explain. "almost" as in it isn't. Killing a thread pre-emptively is the only thing you can do in this case and that is not multithread nor cooperative. You can't resume coroutines from the same Lua state either. It isn't lightening fast, debug hooks are actually extremely costly. Also, we cannot persist debug hooks, thus when a machine is unloaded and reloaded in chunks, any state and special hook magic you might make would be lost. We collect garbage when you've yielded 10 times. Also, lua state will collect garbage dynamically You can already do that, see pcall. Or, run untrusted code in a sandboxed coroutine. The coroutine will die if they OOM. We looked into this, unfortunately you cannot arbitrarily serialize all value types in lua. Kernel Security: There is nothing MORE secure about unboxing any part of the sandbox. In fact, you could just run the machine.lua code, again, inside minecraft, and run an OS inside that sandbox. Sandbox inception! You wouldn't have debug hook, but hooks do not increase security, we only use them for stopping long running processes. And you don't need to do that, we do it for you. We are not in favor of making it this easy for uninformed server owners to expose their private server environments to users. Users have brought this up before and we (developers) are in strong agreement about this. Hopefully you're still reading this far, and not just mad at me for shooting down your sincere request, inspired by your obvious passion. I wanted to encourage you to ignore the constraints of the sandbox, and rather, look at what you really can do with developing a custom kernel. There is a lot more power than you might give credit to the system as it is. I whole heartedly agree that the virtual world in OC can be restricting, and at times extremely frustrating. I sympathize. Look at OpenOS. I have spent thousands of hours of my life developing OpenOS. WIthout a question, the single hardest part has been memory optimization and refinement. I'm a C++ developer (irl); I live in a world where I have complete and precise control over memory management (allocation, monitoring, profiling...). The way Lua allocates memory in chunks for its stack makes knowing the true cost of operations and new code actually very difficult to measure. I built an OC emulator primarily to provide a way for me to profile and measure memory usage. But none of this would have been "easier" outside the sandbox.
  23. payonel

    Can I use these in an init script?

    1. OpenOS doesn't add to nor remove from the debug library, what you see in OpenOS is available to all user space programs/custom operating systems 2. The debug library filtering/sandboxing occurs in the "hardware", before your eeprom code is executed, by our machine.lua (which builds the sandbox) 3. OpenOS has no kernel.lua and never has. OpenOS never calls debug.sethook anywhere. The machine.lua I mentioned (which again, runs OUTSIDE the sandbox, running unsandboxed, running lua code unavailable to OpenOS, unavailable to any user code), but this machine.lua used to be called kernel.lua -- renamed December 7th 2014. Yes, it uses debug.sethook, but users (and openos) are inside the sandbox.
  24. payonel

    Can I use these in an init script?

    for k in pairs(debug) do print(k) end traceback getupvalue getlocal getinfo getlocal, btw, is limited, it only returns the first result (the name of the field, not its value)
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