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Satarsa
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Joined: 21 Sep 2005
Posts: 70
Location: Russia, St.-Petersburg

PostPosted: Fri Jan 25, 2019 8:07 pm    Post subject: Dracut drops to a shell with a strange message Reply with quote

I have a disk encrypted by luks, the encrypted key is stored on a usb stick. When dracut boots the kernel, it gives this error message:
Code:

[    3.466770] dracut: Probing /dev/sde1 for /key...
[    3.629063] EXT4-fs (sde1): mounted filesystem with ordered data mode. Opts: (null)
[    3.641960] dracut: Found /key on /dev/sde1
[    3.652221] dracut: luksOpen /dev/nvme0n1p2 luks-0cd5d4cd-730f-42c1-a2c5-d9ce3dbbff96 
[    3.658428] dracut: Using '/key' on '/dev/sde1'
[    3.821279] EXT4-fs (sde1): mounted filesystem with ordered data mode. Opts: (null)
[    6.882036] EXT4-fs (dm-0): INFO: recovery required on readonly filesystem
[    6.883338] EXT4-fs (dm-0): write access will be enabled during recovery
[    7.275155] EXT4-fs (dm-0): orphan cleanup on readonly fs
[    7.276663] EXT4-fs (dm-0): 2 orphan inodes deleted
[    7.277893] EXT4-fs (dm-0): recovery complete
[    7.294063] EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: data=ordered
[    7.322992] dracut: Checking ext4: /dev/disk/by-uuid/7cec672b-cb75-4f9f-812d-77fe1fdb3124
[    7.324296] dracut: issuing _drv=e2fsck fsck_drv_com -a  /dev/disk/by-uuid/7cec672b-cb75-4f9f-812d-77fe1fdb3124
[    7.327145] dracut Warning: _drv=e2fsck fsck_drv_com returned with 127
[    7.329694] dracut Warning: *** An error occurred during the file system check.
[    7.332215] dracut Warning: *** Dropping you to a shell; the system will try
[    7.334721] dracut Warning: *** to mount the filesystem(s), when you leave the shell.
[    7.339653] dracut Warning:

If I just leave the shell, it continues normal booting.
I tried to google this error message, but it seems that I am the only such lucky person in the world.
How could I fix this? Can I avoid to be dropped to the shell and simply go further? Please, help :)
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Fitzcarraldo
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PostPosted: Fri Jan 25, 2019 11:27 pm    Post subject: Reply with quote

Code:
Warning: _drv=e2fsck fsck_drv_com returned with 127

Looks like it finds some fsck error(s) and wants you to run fsck interactively - see dracut error on boot [solved]:

Guest leon244 wrote:
Ian, thank you. You were correct. The next time I booted and it dropped me into a shell I ran e2fsck on the named partition and did the repairs it wanted. When I rebooted the error message was gone.

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Satarsa
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Joined: 21 Sep 2005
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Location: Russia, St.-Petersburg

PostPosted: Sat Jan 26, 2019 12:35 am    Post subject: Reply with quote

Fitzcarraldo wrote:

Looks like it finds some fsck error(s) and wants you to run fsck interactively - see dracut error on boot [solved]:


Thanks for the answer, but it did not help.
Actually I noticed that in the shell it gives more info:
Code:

/lib/fs-lib.sh: line 109: _drv=e2fsck fsck_drv_com: command not found

/usr/lib64/dracut/modules.d/99fs-lib/fs-lib.sh:
Code:

# common code for checkers that follow usual subset of options and return codes
fsck_drv_com() {
    local _ret
    local _out

    if ! strglobin "$_fop" "-[ynap]"; then
        _fop="-a ${_fop}"
    fi

    info "issuing $_drv $_fop $_dev"
    # we enforce non-interactive run, so $() is fine
    _out=$($_drv $_fop "$_dev")
    _ret=$?
    fsck_tail
       
    return $_ret
}

Line 109 is that one which starts with _out. Plus this comment
Code:

# we enforce non-interactive run, so $() is fine

looks suspicious.
It looks like a bug or typo in those dracut script, like it does not evaluate the variable $_drv, just running _drv, or there is a problem in those magic $($_...).
I have no idea how to fix it, shell is not my favorite language :)
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Satarsa
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PostPosted: Sat Jan 26, 2019 11:16 am    Post subject: Reply with quote

I filed a bug https://bugs.gentoo.org/676268
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mDup
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Posts: 192

PostPosted: Sun Feb 03, 2019 7:16 pm    Post subject: Reply with quote

Fitzcarraldo wrote:
Code:
Warning: _drv=e2fsck fsck_drv_com returned with 127

Looks like it finds some fsck error(s) and wants you to run fsck interactively - see dracut error on boot [solved]:

Guest leon244 wrote:
Ian, thank you. You were correct. The next time I booted and it dropped me into a shell I ran e2fsck on the named partition and did the repairs it wanted. When I rebooted the error message was gone.



same problem here, any tmp preferred solution ?
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Satarsa
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PostPosted: Sun Feb 03, 2019 7:50 pm    Post subject: Reply with quote

mDup wrote:
same problem here, any tmp preferred solution ?


The problem is with bash-5. That patch from the bug report seems to work, I hope it will be submitted to the portage tree soon. Or you can downgrade bash to version 4, it will solve the problem.
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mDup
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PostPosted: Sun Feb 03, 2019 8:46 pm    Post subject: Reply with quote

Satarsa wrote:
mDup wrote:
same problem here, any tmp preferred solution ?


The problem is with bash-5. That patch from the bug report seems to work, I hope it will be submitted to the portage tree soon. Or you can downgrade bash to version 4, it will solve the problem.


I used patch from Comment 9 in gentoo which seems clumsy. But it works
The debian bug #920563 verbatim patch I cannot find.
I see the oneline change but don't know exactly where to put it. I prefer a real patch file to apply.

Which of both patch you refer to?
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Satarsa
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PostPosted: Sun Feb 03, 2019 9:59 pm    Post subject: Reply with quote

mDup wrote:
Which of both patch you refer to?


I put this line
Code:
[ -f /bin/bash ] && [ "$BASH" = "/bin/sh" ] && exec /bin/bash /init

in /usr/lib/dracut/modules.d/99base/init.sh just after the first line, ie:
Code:

#!/bin/sh
[ -f /bin/bash ] && [ "$BASH" = "/bin/sh" ] && exec /bin/bash /init

rebuilt the kernel (I use efi-stub with internal initramfs), and then it works as expected.
As I understand, the problem is that bash version 5 started as /bin/sh behaves according to the POSIX standard, but dracut relies on the bash-specific features, and that line just restarts bash as /bin/bash instead of /bin/sh.
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f4u5t
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PostPosted: Wed Feb 13, 2019 2:34 am    Post subject: Reply with quote

Satarsa wrote:
mDup wrote:
Which of both patch you refer to?


I put this line
Code:
[ -f /bin/bash ] && [ "$BASH" = "/bin/sh" ] && exec /bin/bash /init

in /usr/lib/dracut/modules.d/99base/init.sh just after the first line, ie:
Code:

#!/bin/sh
[ -f /bin/bash ] && [ "$BASH" = "/bin/sh" ] && exec /bin/bash /init



A more gentoo-like way to accomplish this is to create a file /etc/portage/patches/sys-kernel/dracut/dracut-requires-bash.patch with contents:
Code:

diff -urN dracut-049.dist/modules.d/99base/init.sh dracut-049/modules.d/99base/init.sh
--- dracut-049.dist/modules.d/99base/init.sh    2018-10-08 06:38:33.000000000 -0700
+++ dracut-049/modules.d/99base/init.sh 2019-02-12 16:44:10.990128149 -0800
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Licensed under the GPLv2
 #


This will work even if dracut gets re-emerged.
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