Arch Linux

dimich

Member

From: Kharkiv, Ukraine

Registered: 2009-11-03

Posts: 265

[SOLVED] mc stopped to enter compressed tars

I just noticed mc won't enter into compressed tar archives anymore, e.g. into tar.gz. At least several days ago it worked well.

Steps to reproduce:

$ mkdir dir
$ touch dir/foo dir/bar
$ tar -czf dir.tar.gz dir
$ mc

Then set cursor on dir.tar.gz and press Enter. Nothing happens.
The same with tar.bz2, tar.xz, tar.zstd. The same with .tgz suffix.

Entering non-compressed .tar works well.
Entering .cpio works well.

mc-4.8.30-1
Downgrade mc to 4.8.29-2 and to 4.8.29-1 didn't help.
It also happens for newly created users, i.e. ~/.config/mc is absent before run and is empty after first run.
/etc/mc/ is unchanged and the same as in the packages (checked for 4.8.30 and 4.8.29).

Seems mc package is not to blame. I briefly checked other packages upgraded recently. Downgrading zlib to 1:1.2.13-3 didn't help. However, affected not only tar.gz.
How to find a culprit?

Last edited by dimich (2023-09-12 01:29:58)

Channpyae

Member

Registered: 2023-09-02

Posts: 12

Re: [SOLVED] mc stopped to enter compressed tars

Have you tried rebooting your system?

dimich

Member

From: Kharkiv, Ukraine

Registered: 2009-11-03

Posts: 265

Re: [SOLVED] mc stopped to enter compressed tars

Have you tried rebooting your system?

Just rebooted, nothing changed. Can't imagine why that would help.

seth

Member

Registered: 2012-09-03

Posts: 59,742

Re: [SOLVED] mc stopped to enter compressed tars

mc uses a tempfile for this, do you get one in /tmp/mc-$USER  (it's unlinked short thereafter, so you've to look quickly) and do you have write access to that path?

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Awebb

Member

Registered: 2010-05-06

Posts: 6,636

Re: [SOLVED] mc stopped to enter compressed tars

I don't use mc myself, but I can confirm that it worked before the update and didn't work, after.

mc before the update:
extra/mc 4.8.30-1

The whole update, small enough for a full dump:

extra/aom             3.6.1-1       3.7.0-1
extra/arch-wiki-docs  20230228-1    20230901-1
extra/arch-wiki-lite  20230228-1    20230901-1
extra/freetype2       2.13.1-1      2.13.2-1
core/glib2            2.76.4-1      2.76.5-1
extra/imagemagick     7.1.1.15-2    7.1.1.15-3
extra/libdeflate                    1.18-1
extra/libjxl          0.8.2-1       0.8.2-2
extra/openexr         3.1.11-1      3.2.0-2

The one new package is libdeflate, which looked suspicious, but it seems to be a new dep of openexr.

dimich

Member

From: Kharkiv, Ukraine

Registered: 2009-11-03

Posts: 265

Re: [SOLVED] mc stopped to enter compressed tars

mc uses a tempfile for this, do you get one in /tmp/mc-$USER  (it's unlinked short thereafter, so you've to look quickly) and do you have write access to that path?

The directory is created after mc run and has correct permissions:

drwx------ 2 dimich dimich 40 Sep  2 10:31 /tmp/mc-dimich

I can see with inotifywait temporary files are created and deleted there when i access files inside of .cpio (but not when i enter into .cpio).

By the way, enter into .cpio.gz and .cpio.xz works as well.

The whole update, small enough for a full dump

Thank you for narrowing the search! After downgrade glib2 to 2.76.4-1 it started to work again. Looks like a reason to file a bug to upstream. Remains to figure out whether report to glib2 or to mc.

seth

Member

Registered: 2012-09-03

Posts: 59,742

Re: [SOLVED] mc stopped to enter compressed tars

There's not much change between those two glib2 versions, https://gitlab.gnome.org/GNOME/glib/-/c … glib-2-76/
Likely either  https://gitlab.gnome.org/GNOME/glib/-/c … 16847b9582 or https://gitlab.gnome.org/GNOME/glib/-/c … 437c143ac6 ?

You could try to simply rebuild mc against the updated glib2 in case they just broke the ABI.

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toothandnail

Member

From: Oxfordshire, UK

Registered: 2012-05-05

Posts: 90

Re: [SOLVED] mc stopped to enter compressed tars

I'm seeing the same problem. Though I'm also seeing some other broken things. For instance, opening a .mp4 file fails. Opening a LibreOffice file also fails. Opening a PDF file works, as does opening a .zip.

I've also tried rebuilding MC against the new version of glibc. Doesn't help - problem persists.

Since I use MC almost constantly, I guess I'm going to have to downgrade glibc and set it ignored for the moment. I hope there is some simple solution...

seth

Member

Registered: 2012-09-03

Posts: 59,742

Re: [SOLVED] mc stopped to enter compressed tars

*Not* glibc, glib2!

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toothandnail

Member

From: Oxfordshire, UK

Registered: 2012-05-05

Posts: 90

Re: [SOLVED] mc stopped to enter compressed tars

*Not* glibc, glib2!

Sorry, typo...

seth

Member

Registered: 2012-09-03

Posts: 59,742

Re: [SOLVED] mc stopped to enter compressed tars

No problem - it's just that downgrading glibc in isolation has some disaster potential

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Toolybird

Member

Registered: 2017-09-30

Posts: 76

Re: [SOLVED] mc stopped to enter compressed tars

A workaround exists:

https://bugs.archlinux.org/task/79540

dimich

Member

From: Kharkiv, Ukraine

Registered: 2009-11-03

Posts: 265

Re: [SOLVED] mc stopped to enter compressed tars

You could try to simply rebuild mc against the updated glib2 in case they just broke the ABI.

Rebuilding mc with glib-2.76.5 didn't help.

Ticket in mc upstream already exists: https://midnight-commander.org/ticket/4502

Workaround by replacing all `\` with `\\` in mc.ext.ini does work.

birdie-github

Member

From: Artem S. Tashkinov

Registered: 2021-10-09

Posts: 9

Website

Re: [SOLVED] mc stopped to enter compressed tars

A quick fix:

sudo cp -a /etc/mc/mc.ext.ini /etc/mc/mc.ext.ini.bak
sudo sed '/Regex=/s/\\/\\\\/g' -i /etc/mc/mc.ext.ini

loqs

Member

Registered: 2014-03-06

Posts: 18,123

Re: [SOLVED] mc stopped to enter compressed tars

Please try glib2 2.76.5-2 currently in core testing which cherry-picks https://gitlab.gnome.org/GNOME/glib/-/c … e7d2ec11d9

dimich

Member

From: Kharkiv, Ukraine

Registered: 2009-11-03

Posts: 265

Re: [SOLVED] mc stopped to enter compressed tars

Please try glib2 2.76.5-2 currently in core testing which cherry-picks https://gitlab.gnome.org/GNOME/glib/-/c … e7d2ec11d9

With glib2 2.76.5-2 everything seems to work fine.