That moment where your own code becomes so complex you don't understand it.

"Who wrote this flaming pile of... oh wait... it was me."

lol

have you seen my Java?

@NathanOsman Yup, I've experienced that moment before...

@NathanOsman - Are you available to test another APK?

Sure.

Alright, so I've implemented the extract part, and hopefully you'll be able to extract a file from an image I send you. Give me a sec to get it on google drive

@NathanOsman OK, here's the APK and here's the image

@NathanOsman - If all goes well you should end up with a file called recovered_data.bin on your root storage directory. It should open up in Libreoffice

(By root I mean /mnt/sdcard, not /)

04-29 18:05:53.216 11424 11600 I System.out: Reading stego-image from disk...
04-29 18:05:53.216 11424 11600 I System.out: Error!
04-29 18:05:53.217 11424 11600 E AndroidRuntime: FATAL EXCEPTION: Thread-2
04-29 18:05:53.217 11424 11600 E AndroidRuntime: Process: com.androiddev.filesteg, PID: 11424
04-29 18:05:53.217 11424 11600 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference
04-29 18:05:53.217 11424 11600 E AndroidRuntime:        at com.androiddev.filesteg.FileSteg2Util.doExtract(FileSteg2…

Unfortunately, it crashes :(

@NathanOsman Yeah, I had that too - make sure you select the image with the first screen that pops up, don't switch to another app to select it. (The different apps provide different URIs)

But as long as I selected it with the first screen that popped up it didn't crash

@NathanOsman - I probably should have told you that up front, sorry

Ah.

Yeah, I'll need to get around to fixing that at some point...

I actually have some code that might help you with that.

I ran into the same problem with NitroShare.

Oh, I'd love to have a look at it then :)

If memory serves me correctly, it's this block here: github.com/nitroshare/nitroshare-android/blob/master/app/src/…

You might find my choice of a file to embed in that image rather funny - I just needed something long enough that it would take multiple rows, but not so big that it wouldn't fit inside the image

Or rather, here's where execution starts: github.com/nitroshare/nitroshare-android/blob/master/app/src/…

That is in response to an intent with a URI.

Thanks!

It handles ContentResolver.SCHEME_ANDROID_RESOURCE, ContentResolver.SCHEME_CONTENT, and ContentResolver.SCHEME_FILE.

Now if it still crashes even if you don't switch to another app to select it, then kill Android fragmentation with fire

That's the one good thing about Apple

In the end, all it really wants is a AssetFileDescriptor.

Unfortunately, I get another error...

04-29 18:18:39.772 12583 12617 I art     : Alloc concurrent mark sweep GC freed 5(120B) AllocSpace objects, 0(0B) LOS objects, 40% free, 19MB/32MB, paused 165us total 10.201ms
04-29 18:18:39.772 12583 12617 W art     : Throwing OutOfMemoryError "Failed to allocate a 1079009670 byte allocation with 13534976 free bytes and 236MB until OOM"
04-29 18:18:39.772 12583 12617 I art     : Starting a blocking GC Alloc
04-29 18:18:39.772 12583 12617 I art     : Starting a blocking GC Alloc
04-29 18:18:39.774 12583 12617 I art     : Starting a blocking GC Alloc

Out of memory.

It's trying to allocate a 1 GB block of memory...

Yup, I had that too when I selected the wrong image that didn't actually have embedded data

I'll need to fix that as well..

But I selected the one you gave me.

But you're sure you selected the right image?

Okay, let me try again on my end to be sure

@NathanOsman So I downloaded the image I linked you to, and it ran fine...

So what the heck?

I have no idea.

FileSteg2Util.java:151 is where the 1 GB allocation is happening.

@NathanOsman Can you verify the hash of the image? I posted the hash above

And yes that's Windows 7... I don't have Ubuntu on this laptop ATM

$ sha256sum stegoimage.webp
14ea38530ab30dd39b5c0a7b0bd5cb5b9918504ac477539eba1fdbddcee573ab  stegoimage.webp

Different hash for me.

Wait... what's with the .webp extension?

It should be .png

Is Google Drive doing something sketchy here?

Uhmmmmmm... but that makes no sense since I literally re-downloaded it 2 minutes ago!

AHA!

It was my fault.

I right-clicked the image and did "Save As..."

Instead of clicking the download link.

Sorry :)

That's what we have checksums for :)

Let me try again...

I would delete the webp one first so you don't get mixed up

Okay, I've got the recovered data.

recovered_data.bin

Yay! Does it open in Libreoffice?

One sec.

Oh, it's RTF.

I thought it was ODT.

It kept crashing LibreOffice Writer.

I guess that's a bug I should be reporting to them :P

Libreoffice can't open RTF?

What?

I've opened RTFs many times

It can.

It just won't open it if I give it an .odt extension.

RTF works fine - consider this test a success.

Ah

@NathanOsman Well, except for the 2 unhandled exceptions...

True.

It's so annoying that you have to catch the 17 billion possible exceptions... and present the user with a meaningful error message!

Now I'm starting to see why devs tend to have unhelpful error messages and usually use meaningless error codes.

I usually just log the descriptive error as soon as it occurs and then just present a generic message to the user.

They aren't going to understand the technical jargon but they will understand that something went wrong.

And then if they want to tell you about it, they just send the logs.

(Which has your helpful message.)

you see, I log the error and pop something up

with the error included

@NathanOsman - If you're still around could I get your advice on something?

Just about to eat supper.

But if you ask, I can reply later.

@NathanOsman OK. So the way I get the number of bytes to extract from the image is by embedding the length of the byte array in the first 32 bits. But if you give it a random image, those 32 bits could be anything, which is why it tried to allocate 1GB of RAM for you...

So the way I was thinking about getting around that was to embed a checksum of the the first 32 bits and then regenerate the hash of the first 32 on extraction to verify that it is in fact an image with hidden data. Otherwise it would just show a pop-up saying that the image doesn't have embedded data. But I'd like to get your advice on how to do it

Maybe you can think of a much more elegant approach.

Also @TheWanderer feel free to chime in --^

idk what you're talking about

My code

so the guy at the T-Mobile store today told me that the V20 is having battery swelling problems

rip

Well then... Let's hope we don't have another Note 7 situation

well there's nothing in the news

but the V20 has a removable battery

so

Oh right I forgot

@TheWanderer Would you be interested in alpha testing my app too?

wgats it do

Embeds files inside images

I still have a lot of work to do before the next test

I need to handle 2 excpetions

I need to change to getting the buffer instead of reading each pixel one at a time

@DavidFoerster appreciate your comment on "give it a try gents" ;)

Playing around with some textures in Blender:

that your living room? Some comfy seats and a dragon egg?

anyway, nice job, Nathan. Looks nice :)

Thanks :)

I found some textures and I was able to make some of them seamless. This was the test for them.

now make the egg hatch

btw looks good :)

looks like a nice piece of stone rather than an egg

kind of rough

Yup, it's supposed to be a rock.

very nice

but dragoneggs have a dragon inside. rocks are just rocks :P

haha I got an audit in close votes and I tried to post a comment on the question, but a little red popup told me "This is an audit" -thanks for that small clue!

yeah you can abuse it: hey this looks like an audit, lets make an edit :=)

:)

Got stuck in an entirely misconfigured mainboard yesterday... The external graphics card appeared to be broken. So I decided the internal would do. I switched VGA in BIOS only to realize that some genius of an engineer had disabled the internal GPU of that i7 system electro-mechanically for "speed". No big deal normally but that crippled BIOS can't be reset to use the external card.

sounds painful....

horribly so... I even removed the CMOS battery and found the clear-CMOS jumpers. An this only because I promised to install Ubuntu.

:(

@Takkat Did clearing the CMOS work?

And how does one disable the internal GPU? Isn't it quite literally printed on the same die as the CPU?

@Takkat 0_0

@NathanOsman you can disable it on the bios typically...

quite a lot of boards also shared pci lanes...

@NathanOsman it did not work... I suspect clearing made the BIOS use the diabled internal VGA... :(

The DVI-sockets on the board are dead.

Solution in the web is: replacing the mainboard.

(i.e. take one where the internal GPU was not disabled)

We may need a merge on this one

@RobotHumans did you flag? I agree with you

@Zanna I did not yet. Wanted confirmation

And flagged for merge

flagged too :)

very confusing in the current state!

good call

time to go to work :/

as OT as it can get askubuntu.com/questions/910425/…

could be asking about windows ;p

@Rinzwind As OT as in OT en SIEN.

@JacobVlijm Can you havev a look at the comments on this post? Do we need a mod to check out the user? askubuntu.com/questions/910093/…

He's posted this comment twice:

And he seems really impatient:

Maybe you could have a look too @Rinzwind? --^

@ParanoidPanda I know right? And he's posted it twice, and he's very impatient. I'm on the edge of pinging Seth to have a look

Alright.

@AndroidDev he's been on SO for 4 years >:)

O_o

damn

Mmkaaaayy

1 answer 12 q's and reached 9k people

wtf :D

what's he been doing? :X actual life?

yeah but you took your account name into that issue :=)

oh wait!!!!!1

he's been a pirate and sailing

doh!

@Seth Sorry to bother you again, but I think you should have a look at this post (specifically the comments) something isn't quite right... askubuntu.com/q/910093/518562

@Rinzwind I honestly wonder if his account got compromised?

Yup :D

almost time for F1 :=)

@ParanoidPanda Not really no. But did you try adding this:

[Service]
SupplementaryGroups=proc

That's what's suggested in the wiki page you linked to.

@ParanoidPanda I don't know but doing what the wiki says seems like a good first step.

I am assuming that /proc is mounted via systemd (naturally), so that seems like it could indeed modify the way it is mounted.

@Zanna Maybe "gents" referred to gentiles? :-D

hi

is it normal that a user's encrypted home folder stays accessible after the user logged out?

i noticed this a few days ago and checked several times whether it's consistent behavior and it is. i only checked it on 1 installation, though

@UTF-8 No, that's not normal. How did you verify that the user was logged out? Did you check the output of w, who or pgrep -u <USER>?

@DavidFoerster i only checked w

Does the user in question have any running processes?

according to pgrep -u username he doesn't

Hm… I have no idea then. You should open an actual question about that.

okay. i wanted to figure out whether it's a bug first

can you think of an explanation why this would be intended behavior?

Not really. The only scenario that comes to mind is when the eCryptFS file system was mounted manually in the first place and not through the PAM module that manages it normally.

okay. thx. i'm writing my question already

this new Dr. Who series is weird

in case someone who reads this knows the answer: you can post it here: askubuntu.com/q/910484/195768

does anyone know why some messages in this chat have a time annotated on the right but most don't?

I think the time annotations appear after longer periods of inactivity.

on the... right?

and eh. I have a userscript that tacks on a timestamp + message number to everything so...

@UTF-8 a screenshot would help

Yes, I have that script too.

@DavidFoerster but your latest message has a time annotation and it was only sent 3 minutes after mine. my latest message before this one was sent 7 minutes after the one before it and it doesn't

haha, that path in the upload for started with C:\fakepath, not with /t (the folder where it actually is (and yes, /t exists on my systems))

yeah, it's kinda intended behaviour.

Apparently, time stamps on every chat message is noise or something.

ah

I still prefer the old IRC-style timestamps on every message

I have SE chat modifications installed

which does that

yep

coincidence? I think so @ParanoidPanda

@DavidFoerster ^ this would do it

just stare at the output of cat /dev/urandom for a few minutes and i'm sure you'll come across "666" many times

only Dr. Who could make running water creepy

@UTF-8 Well, there's a 2^-24 chance that an arbitrary triple is "666".

That's about 10^-7.

@DavidFoerster so what if one triple ends with "6" and the next one starts with "66"? and you counted across the decimal point. what if there can be some arbitrary character between the numbers?

and according to my calculator, (1÷256)^3 only is 1 in 16777216

plus, you only see the printable characters. if there is something like the null character in-between, you don't see it

it gets more complicated if you use a unicode terminal but you can't just assume to have a 1 in 2^32 chance each time because you're far more likely to hit an ASCII character than some weird chinese one

oh, you wrote "2^-24". i read "10^-24"

@UTF-8 So in that case there's one triple ending in "6", one ending in "66" and one "666". A string of length 5 contains 3 triples. I don't understand the part about decimal points. You talked about "666" which doesn't contain any of those.

yes, but your file's size didn't just show "666 [unit]". it had a decimal point in-between

I didn't take non-printable characters or multi-byte characters into account to keep it simple. Whether and how a terminal displays those depends on the terminal capabilities and configuration.

yes

@UTF-8 I understand that but your original message was talking about the sequence "666" and not "6.66" (even though the letter sequence from Paranoid Panda seems to have prompted your message).

oh, i thought you posted that. oops

#fail

my point was that it's pretty likely to come across a file like that

you should have thousands of files with a size of 666, 6.66, or 66.6 kB or MB

For a random sequence like /dev/urandom they're quite frequent considering that it easily produces 10^7 bytes/second. For file sizes I'm not so sure because they're not distributed evenly.

i think we can assume a natural distribution for file sizes

then there is a 6.7% chance the first digit is a 6

after the first digit, we can assume an even distribution

so about 0.067% of one's files should qualify

i'm counting the files on the laptop i'm on and it's taking a while

503'348

A natural distribution around which centre? There's no theoretical limit on file sizes and small files are fare more frequent than large files. An hyperbolic distribution seems more suitable.

so i should have about 337 of them

benford's law?

Yes, hyperbolic distributions follow Benford's Law.

… or more generally Zipf's Law.

oh, it's been a while since i studied statistics

@ParanoidPanda The Revelation of John.

According to John 666 is the numerical symbol of the Beast, i. e. the Anti-Christ.

Numerology play an important role in Jewish and Christian mysticism.

@ParanoidPanda Uhh… I'd have to look that up. I only translated some excerpts in Latin class.

@ParanoidPanda Hmm, that piratesailor guy deleted the question

@ParanoidPanda en.wikipedia.org/wiki/Number_of_the_Beast

@DavidFoerster in which case, what about the Jewish readers?

Eh?

I think I walked in and resumed an earlier conversation at a confusing moment

Is that even possible?

Oh, that explains why my Jewish flat mate can't stop eating.^^

She herself complains about her obsession with food.

Congrats on 30k @Zanna!

\o/

@ParanoidPanda heh, my people do it too ;p

mostly deep fried to boot .-.

@ParanoidPanda myam

lol

@ParanoidPanda if its not deep fried, its sweet. or deep fried and sweet.

@jokerdino <3

hi

is there a way to decrease the size of hardware in ova file

Decrease size of hardware? Sit on it?

@Zanna congrats!

Thanks :) :)

@Sandro What do you mean? What's an "ova file"?

i ask my server supporter that take a full snapshot backup of my server

and he gave me a ova file

my server configuration is 30GB hard disk

The only "ova" I know are those that go on to grow into an organism of a heterogametic species.

and i want to decrease it to 5GB

@Sandro try out pied piper

(simply put, unless it's compressed really terribly, you can't expect to compress a 30gb file to a 5gb one without some "magic", which is what the fictional tool of "pied piper" simply is)

@DavidFoerster only OVA I know is original video animation that usually are stuff in anime

Someone speaking Italian (I think)? askubuntu.com/q/910480/367990 needs translation

I thought .ova was an extension for VirtualBox machine files.

@NathanOsman Yes, that's what I found out in the mean time.

@ByteCommander Machine translation works quite well for this actually: translate.google.com/#auto/en/…

Hello :)

@NathanOsman That's only when you export them

@jokerdino Congratulations @Zanna ! :) Well done ! :)

@cl-netbox thank you :)

@Zanna You're welcome ! :)

@DiogoGomes See my comment.

@DavidFoerster, thanks.

How can I "revive" a deleted answer whose deletion reason was fixed?

@DavidFoerster you get two more people with >20k or one ♦ to vote to undelete it

@Zanna Go for it then! :-P

@DavidFoerster when I said 2 more, I meant I had already voted

alright :-)

it might be a good idea to special-flag it tbh... there are only 3-4 people who regularly look at the delete/undelete votes page in the 10k tools afaik...

@DavidFoerster only one more needed now...

:)

Is askubuntu.com/a/910566/367990 NAA-flagworthy or just borderline?

idk if I'd dare flag it but I would be happy to join you in delete voting it

I ran out of post votes though... so someone will have to downvote it first

when I see "just google it" I read "please downvote my lazy ass"

just like askubuntu.com/q/910550/367990 ...

I'm annoyed.

David Foerster knows a lot more than me

Thanks @Zanna

@ByteCommander it is a comment :P

Can someone see in system what package do you have installed related to askpass or ssh-add? (Ubuntu pure flavour)

@ByteCommander dupe :=) askubuntu.com/questions/500647/…

@DiogoGomes I don't seem to have any installed, but here's a list of results from searching such packages:

$ apt search askpass
Sorting... Done
Full Text Search... Done
ksshaskpass/xenial 4:5.5.5-0ubuntu1 amd64
  interactively prompt users for a passphrase for ssh-add

kwalletcli/xenial 2.12-5 amd64
  command line interface to the KDE Wallet

lxqt-openssh-askpass/xenial 0.10.0-3 amd64
  OpenSSH user/password GUI dialog for LXQt

razorqt-openssh-askpass/xenial 0.5.2-4build1 amd64
  OpenSSH helper component for Razor-qt desktop environment

ssh-askpass/xenial 1:1.2.4.1-9 amd64
  under X, asks user for a passphrase for ssh-add

I see that, but sorry, I can't help you there.

I don't think I ever even saw the prompt you're showing in your screenshot

Mine is a bit longer

Budgie

oops. itis the same

@ByteCommander It is an older prompt. Can you show me actual prompt? My actual computer crash with Ubuntu, I'm in Xubuntu instead.

What do I need to do to see it?

I also just get command-line prompts here...

Deprecated in 17.04? I had it in Ubuntu 16.04.....

I'm on 16.04 too, just in case you draw your conclusion from what I said and not from any other source...

found another answer I want to delete but can't downvote until tomorrow...

oh well, better call it a day

I really, really love arch and how I just broke it by installing nvidia drivers. It broke my Xorg and my kernel even though I followed the wiki. 10/10.

(I'm mostly sarcastic on how I love it, if it isn't visible)

I know, it's why i play with "love" and "like" words ;)

ahh

the wiki is indeed usually good, but if you don't know the order to do stuff (I don't!), you can break stuff like I just did, ugh.

reinstalled again, let's see how it goes.

@Avery: You're a member of 103 StackExchange sites. O.O

I like following HNQ links and usually join communities when the content is interesting and upvote worthy

@Avery (broke again, installed bumblebee, maybe it'll owrk now)

@Avery I never try Arch, since my issues with my actual nvidia gpu (old and outdated), I switch to Manjaro (some hours), then to Antergos (one day, very unstable for my hardware), then to Manjaro again (1/2 weeks and two updates broken my system twice) and finally I stop bumping distro in Xubuntu.

ubuntu is the best if you want stability and support

and the friendliness

@DavidFoerster Why only 103 if you can have all 167? :P

@ByteCommander wait

WHAT HAPPENED TO YOUR DIAMOND

??

I haven't had any yet.

(weren't you a mod? am I misremembering?)

I was running in the last elections, but didn't get one yet.

Not an AU.

@Avery (that's why I'm here- even though arch is off topic here, I love this community)