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#1 2017-12-03 16:22:27

makh
Member
Registered: 2017-10-08
Posts: 51  

[SOLVED] <Ascii> Devuan Version

Hi

I run to get:

# cat /etc/devuan_version && cat /etc/debian_version
jessie
9.2

It doesnt return ascii.

Thankyou

Last edited by makh (2017-12-18 07:02:49)


HP Probook 440 G2: Arch, Debian Stable
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#2 2017-12-06 04:55:43

chillfan
Member
Registered: 2016-12-01
Posts: 54  

Re: [SOLVED] <Ascii> Devuan Version

Similarly the ASCII console reads: Debian GNU/Linux 9 devuan

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#3 2017-12-06 11:52:51

nixer
Member
From: North Carolina, USA
Registered: 2016-11-30
Posts: 47  

Re: [SOLVED] <Ascii> Devuan Version

For what its worth...
In Ceres,

# cat /etc/devuan_version && cat /etc/debian_version
ascii/ceres
cat: /etc/debian_version: No such file or directory

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#4 2017-12-06 12:22:03

sgage
Member
Registered: 2016-12-01
Posts: 124  

Re: [SOLVED] <Ascii> Devuan Version

Running lsb_release gives this (I'm running ascii):

sgage@ascii:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Devuan
Description:	Devuan GNU/Linux ascii
Release:	ascii
Codename:	n/a
sgage@ascii:~$ 

I think it should be Release: 2.0 and Codename: ascii.

Last edited by sgage (2017-12-06 12:23:20)

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#5 2018-08-24 01:02:17

voomto
Member
Registered: 2017-10-06
Posts: 6  

Re: [SOLVED] <Ascii> Devuan Version

Hi!

I had the same problem of no-root buggy outputs of lsb_release on my devuan2 real and virtual machines upgraded from devuan1 and debian7.
As I noticed that problem does not concern freshly installed devuan2 machines, I made investigations and... I have just found how to fix it :

chmod 755 /var/lib/apt/lists

---
For information, I share the details of my investigations here:

That bug does not concern fresh installed devuan2 from DVD:

demo@fresh_installed_devuan2:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Devuan
Description:	Devuan GNU/Linux 2.0 (ascii)
Release:	2.0
Codename:	ascii

But it concerns upgraded devuan2 machines when lsb_release is executed with no root permission:

demo@upgraded_devuan2:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Devuan
Description:    Devuan GNU/Linux ascii
Release:        ascii
Codename:       n/a

Comparison between upgraded and fresh_installed devuan2:
I have compared the base-files package files + the script /usr/bin/lsb_release between my machines, but I found no difference.

Comparison between root and no root execution of lsb_release on an upgraded devuan2:
As /usr/bin/lsb_release imports /usr/lib/python2.7/dist-packages/lsb_release.py, I decided to compare the execution of its function guess_devuan_release() between root and no root execution on an upgraded devuan2:

root@upgraded_devuan2:~# python
Python 2.7.13 (default, Nov 24 2017, 17:33:09) 
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import lsb_release
>>> lsb_release.guess_devuan_release()
{'DESCRIPTION': u'Devuan GNU/Linux 2.0 (ascii)', 'RELEASE': u'2.0', 'CODENAME': 'ascii', 'OS': 'GNU/Linux', 'ID': 'Devuan'}
demo@upgraded_devuan2:~$ python
Python 2.7.13 (default, Nov 24 2017, 17:33:09) 
[GCC 6.3.0 20170516] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import lsb_release
>>> lsb_release.guess_devuan_release()
{'RELEASE': 'ascii', 'OS': 'GNU/Linux', 'ID': 'Devuan', 'DESCRIPTION': 'Devuan GNU/Linux ascii'}

Going on deeper within that script, I found out that:

  • /etc/devuan_version remains buggy in devuan2 (ascii instead of 2)

  • Unnoticed indent error: from line #321 to #334 of lsb_release.py (lsb-release 4.1+devuan2), the function guess_devuan_release() uses mixed 2 and 4 spaces indent instead of the 4 ones used in the rest of the script

      rinfo = guess_release_from_apt()
      if rinfo:
        release = rinfo.get('version')

        if release:
            codename = lookup_codename(release, 'n/a')
        else:
            release = rinfo.get('suite', 'unstable')
            if release == 'testing':
                # Would be nice if I didn't have to hardcode this.
                codename = TESTING_CODENAME
            else:
                codename = 'ceres'
        distinfo.update({ 'RELEASE' : release, 'CODENAME' : codename })
  • Called by guess_devuan_release(), the function parse_apt_policy() of lsb_release.py executes in a sub-shell the command 'env LC_ALL=C apt-cache policy'

Then, I suspected /usr/bin/apt-cache. Indeed, it fails with no root permission:

demo@upgraded_devuan2:~$ 
Package files:
 100 /var/lib/dpkg/status
     release a=now
Pinned packages:
demo@upgraded_devuan2:~$

What's broken with apt?
I reinstalled the package apt. But this makes no change.
Debugging this re-installation with apt-get -o Debug::RunScript -o Debug::pkgAcquire::Worker -o Debug::pkgAcquire::Auth -y --reinstall install apt, I saw nothing interesting.

The perms and ownerships of /etc/apt/sources.list and /etc/apt/sources.list.d/* looked normal.

So as a last resort, I decided to check the execution of /usr/bin/apt-cache with strace :

demo@upgraded_devuan2:~$ strace -x -e trace=open,close,read,write -o apt-cache_strace_demo.log env LC_ALL=C apt-cache policy
root@upgraded_devuan2:~# strace -x -e trace=open,close,read,write -o apt-cache_strace_root.log env LC_ALL=C apt-cache policy

root@upgraded_devuan2:~# grep "Permission denied" apt-cache_strace_root.log
demo@upgraded_devuan2:~$ grep "Permission denied" apt-cache_strace_demo.log 
open("/var/lib/apt/lists/", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = -1 EACCES (Permission denied)
...

Never was so close to the truth:

demo@upgraded_devuan2:~$ stat /var/lib/apt/lists
  Fichier : /var/lib/apt/lists
   Taille : 4096        Blocs : 8          Blocs d'E/S : 4096   répertoire
Périphérique : fe00h/65024d     Inœud : 1047578     Liens : 3
Accès : (0770/drwxrwx---)  UID : (    0/    root)   GID : (    0/    root)

demo@fresh_installed_devuan2:~$ stat /var/lib/apt/lists
  Fichier : /var/lib/apt/lists
   Taille : 4096      	Blocs : 8          Blocs d'E/S : 4096   répertoire
Périphérique : 801h/2049d	Inœud : 260613      Liens : 3
Accès : (0755/drwxr-xr-x)  UID : (    0/    root)   GID : (    0/    root)

Obviously, the only problem that prevented apt-cache to run correctly as a no-root user, with side effects on lsb_release is a directory permission.
Then I fixed it:

chmod 755 /var/lib/apt/lists

Hope this can help.

Last edited by voomto (2018-08-24 01:04:15)

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