[SRU] Upgrade to to fix regression breaking Epoptes

Bug #1875129 reported by Alkis Georgopoulos on 2020-04-26
This bug affects 1 person
Affects Status Importance Assigned to Milestone
socat (Debian)
Fix Released
socat (Ubuntu)

Bug Description

The socat version in Focal,, has a regression that breaks the "remote terminal" functionality of the "epoptes" package.

I reported it to Debian, and the Debian maintainer packaged the new socat which solves the issue:

This new upstream version is a bug fixing release which I believe can be considered a microrelease:

Please sync it to focal-proposed.

[Test case]
Here are the regression details, in order to be able to reproduce it:

Epoptes is a computer lab management tool, I'm upstream and Debian maintainer for it. Among other things, it uses socat to forward a "student" terminal to the "teacher". To reproduce the issue without installing Epoptes, the following similar commands may be used instead:

Teacher (just run it in a terminal tab):
xterm -e socat tcp-listen:1234,reuseaddr,keepalive=1 stdio,raw,echo=0

Student (just run it in another terminal tab):
TERM=xterm socat EXEC:'screen bash -l',pty,stderr tcp:localhost:1234

This works fine with all socat versions except
In, it's like line buffering is enabled or something similar, and pressing for example the up arrow in the keyboard shows "^[OA" instead of displaying the last bash command. Thus, the forwarded xterm is almost unusable.

[Regression potential]
Low. It's a bug fixing upstream release.
I have compiled from source and I've been using it for about a month with no visible issues. I also installed the .deb from sid to my focal box today and it appears to work fine.
Note though that https://tracker.debian.org/pkg/socat shows a unit test failure on arm64 (networkd-test.py), I don't know if that was the case with previous versions or not.

description: updated
summary: - Socat in focal has regression, please sync with sid
+ [SRU] Regression in socat, please sync
Mathew Hodson (mhodson) on 2020-04-27
tags: added: upgrade-software-version
summary: - [SRU] Regression in socat, please sync
+ [SRU] Upgrade to to fix Epoptes regression
Changed in socat (Ubuntu):
importance: Undecided → Medium has landed in Groovy, I tested https://launchpad.net/ubuntu/+archive/primary/+files/socat_1.7.3.4-1_amd64.deb in Focal and it works fine.

I also copied it to the Epoptes stable PPA, https://launchpad.net/~epoptes/+archive/ubuntu/ppa/+packages.

Btw the regression is in socat, not in Epoptes, it can be reproduced without involving Epoptes at all.

Thank you!

Mathew Hodson (mhodson) on 2020-04-29
summary: - [SRU] Upgrade to to fix Epoptes regression
+ [SRU] Upgrade to to fix regression breaking Epoptes
Changed in socat (Ubuntu Focal):
importance: Undecided → Medium
Changed in socat (Ubuntu):
status: New → Fix Committed
Changed in socat (Debian):
status: Unknown → Fix Released
Mathew Hodson (mhodson) wrote :

socat ( unstable; urgency=medium

  * New upstream release (closes: #958452).
  * Comment out libwrap variables to fix GCC 10 FTBFS (closes: #957823).
  * Update Standards-Version to 4.5.0 .

 -- Laszlo Boszormenyi (GCS) <email address hidden> Sat, 25 Apr 2020 06:17:10 +0000

Changed in socat (Ubuntu):
status: Fix Committed → Fix Released
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