Debian Bug report logs - #817023
os-prober doesn't detect EFI partition on MBR

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: kay <kay.diam@gmail.com>

To: submit@bugs.debian.org

Subject: os-prober doesn't detect EFI partition on MBR

Date: Mon, 7 Mar 2016 10:50:33 +0100

Package: os-prober
Version: 1.71

Also reproducible in os-prober 1.65

https://anonscm.debian.org/cgit/d-i/os-prober.git/tree/os-probes/mounted/x86/05efi#n42..n45

Disk has regular MBR table. It has Windows 7 and Ubuntu installed on
different partitions. Os-prober doesn't detect EFI partition on MBR
table because "udevadm info" returns "dos" partition scheme instead of
expected "msdos".

  $ udevadm info /dev/sda1 | grep dos
  E: ID_PART_ENTRY_SCHEME=dos
  E: ID_PART_TABLE_TYPE=dos

  $ fdisk -lu /dev/sda | grep -B1 -A1 ef
     Device Boot Start End Blocks Id System
  /dev/sda1 * 2048 616447 307200 ef EFI (FAT-12/16/32)
  /dev/sda2 616448 128134439 63758996 7 HPFS/NTFS/exFAT

Fixing conditions below resolves the issue:

- \( "$ID_PART_ENTRY_SCHEME" != gpt -a "$ID_PART_ENTRY_SCHEME" != msdos \) -o \
+ \( "$ID_PART_ENTRY_SCHEME" != gpt -a "$ID_PART_ENTRY_SCHEME" != dos \) -o \
  \( "$ID_PART_ENTRY_SCHEME" = gpt -a "$ID_PART_ENTRY_TYPE" !=
c12a7328-f81f-11d2-ba4b-00a0c93ec93b \) -o \
- \( "$ID_PART_ENTRY_SCHEME" = msdos -a "$ID_PART_ENTRY_TYPE" != 0xef \) ]; then
+ \( "$ID_PART_ENTRY_SCHEME" = dos -a "$ID_PART_ENTRY_TYPE" != 0xef \) ]; then

Probably this bug relates to udevinfo replacement
(https://lists.debian.org/debian-user/2010/07/msg01134.html).

P.S. Cross-posting report in ubuntu launchpad
https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1553678

Message #14 received at 817023@bugs.debian.org (full text, mbox, reply):

From: Cyril Brulebois <kibi@debian.org>

To: kay <kay.diam@gmail.com>, 817023@bugs.debian.org

Cc: Steve McIntyre <steve@einval.com>

Subject: Re: Bug#817023: os-prober doesn't detect EFI partition on MBR

Date: Sat, 24 Jun 2017 19:31:27 +0200

[Message part 1 (text/plain, inline)]

Hi,

kay <kay.diam@gmail.com> (2016-03-07):
> Package: os-prober
> Version: 1.71
> 
> Also reproducible in os-prober 1.65
> 
> https://anonscm.debian.org/cgit/d-i/os-prober.git/tree/os-probes/mounted/x86/05efi#n42..n45
> 
> Disk has regular MBR table. It has Windows 7 and Ubuntu installed on
> different partitions. Os-prober doesn't detect EFI partition on MBR
> table because "udevadm info" returns "dos" partition scheme instead of
> expected "msdos".
> 
>   $ udevadm info /dev/sda1 | grep dos
>   E: ID_PART_ENTRY_SCHEME=dos
>   E: ID_PART_TABLE_TYPE=dos
> 
>   $ fdisk -lu /dev/sda | grep -B1 -A1 ef
>      Device Boot Start End Blocks Id System
>   /dev/sda1 * 2048 616447 307200 ef EFI (FAT-12/16/32)
>   /dev/sda2 616448 128134439 63758996 7 HPFS/NTFS/exFAT
> 
> Fixing conditions below resolves the issue:
> 
> - \( "$ID_PART_ENTRY_SCHEME" != gpt -a "$ID_PART_ENTRY_SCHEME" != msdos \) -o \
> + \( "$ID_PART_ENTRY_SCHEME" != gpt -a "$ID_PART_ENTRY_SCHEME" != dos \) -o \
>   \( "$ID_PART_ENTRY_SCHEME" = gpt -a "$ID_PART_ENTRY_TYPE" !=
> c12a7328-f81f-11d2-ba4b-00a0c93ec93b \) -o \
> - \( "$ID_PART_ENTRY_SCHEME" = msdos -a "$ID_PART_ENTRY_TYPE" != 0xef \) ]; then
> + \( "$ID_PART_ENTRY_SCHEME" = dos -a "$ID_PART_ENTRY_TYPE" != 0xef \) ]; then
> 
> Probably this bug relates to udevinfo replacement
> (https://lists.debian.org/debian-user/2010/07/msg01134.html).
> 
> P.S. Cross-posting report in ubuntu launchpad
> https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1553678

So I've tracked this to udev in systemd.git calling blkid functions to
get the partition type, and to libblkid/src/partitions/dos.c in
util-linux.git; it doesn't seem to have been called msdos previously,
so I think the proposed change looks good.

This needs to be backported to jessie and stretch AFAICT.

Cc-ing Steve since this involves EFI though, to have another pair of
eyes go over this.


KiBi.

[signature.asc (application/pgp-signature, inline)]

Message #19 received at 817023-close@bugs.debian.org (full text, mbox, reply):

From: Christian Perrier <bubulle@debian.org>

To: 817023-close@bugs.debian.org

Subject: Bug#817023: fixed in os-prober 1.76

Date: Wed, 28 Jun 2017 06:03:10 +0000

Source: os-prober
Source-Version: 1.76

We believe that the bug you reported is fixed in the latest version of
os-prober, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 817023@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Christian Perrier <bubulle@debian.org> (supplier of updated os-prober package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Wed, 28 Jun 2017 07:08:36 +0200
Source: os-prober
Binary: os-prober-udeb os-prober
Architecture: source i386
Version: 1.76
Distribution: unstable
Urgency: medium
Maintainer: Debian Install System Team <debian-boot@lists.debian.org>
Changed-By: Christian Perrier <bubulle@debian.org>
Description:
 os-prober  - utility to detect other OSes on a set of drives
 os-prober-udeb - utility to detect other OSes on a set of drives (udeb)
Closes: 817023
Changes:
 os-prober (1.76) unstable; urgency=medium
 .
   [ Cyril Brulebois ]
   * os-probes/mounted/x86/05efi: Fix check on ID_PART_ENTRY_SCHEME, to
     look for "dos" instead of "msdos" (Closes: #817023).
Checksums-Sha1:
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Message #24 received at 817023-close@bugs.debian.org (full text, mbox, reply):

From: Cyril Brulebois <kibi@debian.org>

To: 817023-close@bugs.debian.org

Subject: Bug#817023: fixed in os-prober 1.65+deb8u1

Date: Sat, 15 Jul 2017 21:49:22 +0000

Source: os-prober
Source-Version: 1.65+deb8u1

We believe that the bug you reported is fixed in the latest version of
os-prober, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 817023@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Cyril Brulebois <kibi@debian.org> (supplier of updated os-prober package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Thu, 13 Jul 2017 13:25:12 +0200
Source: os-prober
Binary: os-prober-udeb os-prober
Architecture: source amd64
Version: 1.65+deb8u1
Distribution: jessie
Urgency: medium
Maintainer: Debian Install System Team <debian-boot@lists.debian.org>
Changed-By: Cyril Brulebois <kibi@debian.org>
Description:
 os-prober  - utility to detect other OSes on a set of drives
 os-prober-udeb - utility to detect other OSes on a set of drives (udeb)
Closes: 791383 801278 817023
Changes:
 os-prober (1.65+deb8u1) jessie; urgency=medium
 .
   * os-probes/mounted/x86/05efi: Fix check on ID_PART_ENTRY_SCHEME, to
     look for "dos" instead of "msdos" (Closes: #817023).
   * Add -a flag to grep -qs for Windows Vista detection. It appears the
     file isn't always considered as a text file, so this should be more
     robust. Thanks to Gianluigi Tiesi for the report and the suggestion
     (Closes: #791383).
   * Add support for Windows 10 (otherwise reported as Windows Recovery
     Environment). Thanks, Philipp Wolfer! (Closes: #801278).
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Files:
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