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Unix v4 (1973) – Live Terminal

https://unixv4.dev/
74•pjmlp•2h ago

Comments

colesantiago•2h ago
Just a heads up:

> By using this service, you acknowledge that terminal sessions may be logged for educational and debugging purposes. No personal data is collected beyond your IP address.

Is this all open source and is the code available? So that we know where the data is truly going?

Hard to trust it if it isn't fully OSS.

This is a cool demo though.

voidfunc•1h ago
Even if it was open source how do you know its not a fork?
lo_zamoyski•1h ago
And even more to the point: this is a website. What is he afraid of this website doing that all the other websites don't already do? Why single this one out?
qarl•1h ago
WARNING: YOU ARE ABOUT TO OPEN A WEBPAGE.
StableAlkyne•1h ago
> Hard to trust it if it isn't fully OSS

It's an emulated PDP-11, could you elaborate on the threat model here?

I get that companies are being gross about logging everything online, but come on. It's okay to have fun.

Who in their right mind is using this for anything other than curiosity's sake?

utopiah•1h ago
Little bit of banking on an emulator on a random website, why not?
cocodill•1h ago
bitcoin will not be mined on its own.
altairprime•1h ago
> Hard to trust it

Clarification requested: How is ‘trust’ applicable to this site?

znpy•20m ago
Yeah it’s unlikely that this site will collect any meaningful data and it’s unlikely that you lose any meaningful data by playing with a virtual unix from the 70ies.

You aren’t getting downvoted enough.

publicdebates•1h ago

    Session Error
    Rate limit exceeded: 10 per 1 minute
hnthrowaway0315•1h ago
I managed to get in after a few tries. But then I got a timeout. I think I'm going to wait until the HN deathhug is over :D
charcircuit•1h ago
Did they get a license from Novell for this or is this as illegal as many of the other emulator sites with copyrighted software on them? Considering the page doesn't mention it, I'm leaning towards it being copyright infringement.
LukeShu•1h ago
In 2002, Caldera licensed Research Unix <= 7th edition and 32-bit 32V Unix under a BSD-style license.

Gotta stick the "This product includes software developed or owned by Caldera International, Inc." notice on it though.

charcircuit•53m ago
This copy of Unix v4 came from AT&T and not one of the freely licensed ones Caldera released. Caldera may own the rights now for this unearthed copy, but I am not aware that they have provided licenses for this new release.
spijdar•11m ago
If your argument is that Caldera might not actually have the rights to UNIX in the first place to grant the license, that's fair.

But the license they provided (http://www.lemis.com/grog/UNIX/ancient-source-all.pdf) explicitly names versions 1, 2, 3, 4, 5, 6, and 7 of UNIX for the 16-bit PDP-11. Yes, these versions originated at AT&T (Bell Labs) but are distinct legally from SysIII and SysV UNIX, also from AT&T, which are explicitly not covered by the Caldera license.

charcircuit•5m ago
Thank you for finding this, but this only appears to apply to the source they themselves released.

>Redistributions of source code and documentation must retain the above copyright notice

The archived tape doesn't have this, which contradicts the license.

>Redistributions in binary form must reproduce the above copyright notice

I don't see the copyright notice on that page.

fortyseven•1h ago
Personal financial stake in this, or do you regularly police the use of ancient software?
charcircuit•48m ago
>Personal financial stake in this

In the sense that the company I work for would be financially harmed if copyright infringement of software was freely allowed. I benefit from the ability of people being able to sell rights to use software.

It's one thing to digitize and archive ancient software, it's another thing to allow people to freely use it without acquiring the proper license for it.

publicdebates•20m ago
What do you think about GOG?
charcircuit•16m ago
It's good to have competition against Steam.
enricotr•1h ago
Almost slashdotted.
ramon156•1h ago
Rate limited! a new record!
Deeg9rie9usi•58m ago
Reading the source unearths interesting things: https://sigma-star.at/blog/2025/12/unix-v4-buffer-overflow/
mananaysiempre•31m ago
I kept expecting an exploit :) Something to poke at on a slow evening, I guess, though with the buffer in static memory it might be difficult.
Deeg9rie9usi•29m ago
Exploiting this is close to trivial because the adjacent buffer contains the pw entry. So, you can control what the input is compared with. That way the password check can be bypassed without injecting code.
TZubiri•38m ago
Getting a rate limit error, but I haven't used the program.
dim13•21m ago
Glad to have played with it a bit before it got Slashdotted. ;)

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Unix v4 (1973) – Live Terminal

https://unixv4.dev/
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