Can You Grok It – Hacking Together Your Own Dev Tunnel Service

Re:Can You Grok It – Hacking Together Your Own Dev Tunnel Se... by mcint on Sunday April 14, 2024 @08:48PM (#40035922)

For automatic cleanup, you can try bash's trap command. Set up a cleanup trap when you create the file.

In .ssh/rc:

  if [ -n "$DOMAIN" ]; then
    # ... create socket & report to user

    clean_socket(){ rm /tmp/test.dev.tld.socket; }
    trap clean_socket EXIT INT HUP;

  fi

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Re:Can You Grok It – Hacking Together Your Own Dev Tunnel Se... by 0xdade on Monday April 15, 2024 @12:12AM (#40037012)

Ohh so I just gave this a shot and I think that the trap runs when `.ssh/rc` exits, which is immediately when my bash prompt shows up. But if I want to make it non-interactive (in a really hacky way) then I can have my .ssh/rc file just infinitely sleep if domain is defined. Then I killed the ssh connection via a `kill` command on the client side and it appropriately cleaned up the socket file in tmp.

I combined this infinite loop in ssh rc and a -T and a simple command "echo hello" in my client function and now it prints out the link to visit, hangs infinitely until I close it or it gets closed, and cleans itself up.

This just took the level of hackishness to new heights and I love it.

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Re:Can You Grok It – Hacking Together Your Own Dev Tunnel Se... by cbluth on Monday April 15, 2024 @01:03AM (#40037220)

Using a trap didn't work?

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Re:Can You Grok It – Hacking Together Your Own Dev Tunnel Se... by 0xdade on Sunday April 14, 2024 @10:43PM (#40036603)

Oooh, I hadn't considered HUP. I tried to use a cleanup script with a bash trap on I think INT and KILL but it didn't seem to work correctly. I had also never tried to use a trap command, though, so there was a good chance I was doing it wrong lol. I'll give this a shot!

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