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modnaruved
Tux's lil' helper
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Joined: 21 Mar 2011
Posts: 144

PostPosted: Wed Sep 28, 2016 9:29 pm    Post subject: after emerge: error with /dev/null (is broken) Reply with quote

Hi!

Just update my portage today (and work with code in emacs):

Code:

...................
>>> Failed to emerge net-ftp/lftp-4.7.3, Log file:                                                                                                                                          [68/8789]
>>>  '/var/tmp/portage/net-ftp/lftp-4.7.3/temp/build.log'
>>> Jobs: 16 of 31 complete, 1 failed               Load avg: 3.13, 3.04, 2.46
 * Package:    net-ftp/lftp-4.7.3
 * Repository: gentoo
 * Maintainer: jer@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc gnutls ipv6 kernel_linux linguas_ru nls ssl userland_GNU
 * FEATURES:   ccache preserve-libs sandbox userpriv usersandbox
/usr/lib/portage/python3.4/phase-functions.sh: line 845: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 847: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 849: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 851: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 853: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 855: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 863: /dev/null: Permission denied
/usr/portage/profiles/base/profile.bashrc: line 5: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 198: /dev/null: Permission denied
>>> Unpacking source...
/usr/lib/portage/python3.4/phase-functions.sh: line 198: /dev/null: Permission denied
>>> Source unpacked in /var/tmp/portage/net-ftp/lftp-4.7.3/work
/usr/lib/portage/python3.4/phase-functions.sh: line 198: /dev/null: Permission denied
/bin/sh: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 845: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 847: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 849: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 851: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 853: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 855: /dev/null: Permission denied
/usr/lib/portage/python3.4/phase-functions.sh: line 863: /dev/null: Permission denied
/usr/portage/profiles/base/profile.bashrc: line 5: /dev/null: Permission denied
 * ERROR: net-ftp/lftp-4.7.3::gentoo failed (prepare phase):
 *   The source directory '/var/tmp/portage/net-ftp/lftp-4.7.3/work/lftp-4.7.3' doesn't exist
 *
 * Call stack:
 *            ebuild.sh, line  762:  Called __ebuild_main 'prepare'
 *   phase-functions.sh, line 1005:  Called __dyn_prepare
 *   phase-functions.sh, line  369:  Called die
 * The specific snippet of code:
 *              die "The source directory '${S}' doesn't exist"
 *
 * If you need support, post the output of `emerge --info '=net-ftp/lftp-4.7.3::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=net-ftp/lftp-4.7.3::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/net-ftp/lftp-4.7.3/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/net-ftp/lftp-4.7.3/temp/environment'.
 * Working directory: '/usr/lib64/python3.4/site-packages'
 * S: '/var/tmp/portage/net-ftp/lftp-4.7.3/work/lftp-4.7.3'
/bin/sh: /dev/null: Permission denied

...................


 * Messages for package net-ftp/lftp-4.7.3:

 * ERROR: net-ftp/lftp-4.7.3::gentoo failed (prepare phase):
 *   The source directory '/var/tmp/portage/net-ftp/lftp-4.7.3/work/lftp-4.7.3' doesn't exist
 *
 * Call stack:
 *            ebuild.sh, line  762:  Called __ebuild_main 'prepare'
 *   phase-functions.sh, line 1005:  Called __dyn_prepare
 *   phase-functions.sh, line  369:  Called die
 * The specific snippet of code:
 *              die "The source directory '${S}' doesn't exist"
 *
 * If you need support, post the output of `emerge --info '=net-ftp/lftp-4.7.3::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=net-ftp/lftp-4.7.3::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/net-ftp/lftp-4.7.3/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/net-ftp/lftp-4.7.3/temp/environment'.
 * Working directory: '/usr/lib64/python3.4/site-packages'
 * S: '/var/tmp/portage/net-ftp/lftp-4.7.3/work/lftp-4.7.3'

 * GNU info directory index is up-to-date.
 * After world updates, it is important to remove obsolete packages with
 * emerge --depclean. Refer to `man emerge` for more information.
-bash: /dev/null: Permission denied


it is not first case - it is occurs sometime (maybe after similar errors)

at this moment /dev/null is:
Code:

stat /dev/null                                                                                                                                                                             
  File: ‘/dev/null’
  Size: 0               Blocks: 0          IO Block: 4096   regular empty file
Device: 5h/5d   Inode: 25618161    Links: 1
Access: (0600/-rw-------)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2016-09-28 23:59:10.987234481 +0300
Modify: 2016-09-29 00:02:13.982933913 +0300
Change: 2016-09-29 00:02:13.982933913 +0300
 Birth: -


to restore I use this (not sure that is right - please correct my code):
Code:

cp /dev/null /tmp/zero-dev.save
rm /dev/null         
mknod /dev/null c 1 3
chmod 666 /dev/null 


after this /dev/null is:
Code:

stat /dev/null                                                                                                                                                                             
  File: ‘/dev/null’
  Size: 0               Blocks: 0          IO Block: 4096   character special file
Device: 5h/5d   Inode: 25633703    Links: 1     Device type: 1,3
Access: (0666/crw-rw-rw-)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2016-09-29 00:12:49.198948167 +0300
Modify: 2016-09-29 00:12:49.198948167 +0300
Change: 2016-09-29 00:13:54.887122354 +0300
 Birth: -


Is it this commands enough?
Is it safe to reboot now?

emerge --info:

https://paste.pound-python.org/show/Z2ip8rHVL7lEeFsyHWKY/

please try to fix if it portage related error

thanks
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NeddySeagoon
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PostPosted: Wed Sep 28, 2016 10:18 pm    Post subject: Reply with quote

modnaruved,

That looks fine, if that's the real problem.

/dev should be mounted as a devtmpfs filesystem. Them its recreaded by the kernel every boot and maintained when devices are added/removed.
Its possible that /dev was unmounted, showing you the static /dev underneath. This static /dev could have been corrupted some time ago.

The reboot should create a whole new /dev for you.
_________________
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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modnaruved
Tux's lil' helper
Tux's lil' helper


Joined: 21 Mar 2011
Posts: 144

PostPosted: Wed Sep 28, 2016 10:27 pm    Post subject: Reply with quote

NeddySeagoon wrote:
modnaruved,

That looks fine, if that's the real problem.

/dev should be mounted as a devtmpfs filesystem. Them its recreaded by the kernel every boot and maintained when devices are added/removed.
Its possible that /dev was unmounted, showing you the static /dev underneath. This static /dev could have been corrupted some time ago.

The reboot should create a whole new /dev for you.

Thanks for answer

How can I check that my /dev is mounted as a devtmpfs filesystem?

my /dev now (still don't rebooted):
https://paste.pound-python.org/show/jS0R2UKJ3IJE22fcbFrf/
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Josef.95
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Joined: 03 Sep 2007
Posts: 3441
Location: Germany

PostPosted: Thu Sep 29, 2016 3:27 am    Post subject: Reply with quote

modnaruved wrote:
How can I check that my /dev is mounted as a devtmpfs filesystem?
Look at
Code:
mount | grep devtmpfs


And please change /dev/null (and /dev/console) not in a running system (or a chroot).
If it needed, do it from a LiveCD, mount your / Partition to /mnt/gentoo
and remove the old, and create it new with
mknod -m 600 /mnt/gentoo/dev/console c 5 1
mknod -m 666 /mnt/gentoo/dev/null c 1 3
sync
umount /mnt/gentoo
reboot

It should work :)
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NeddySeagoon
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PostPosted: Thu Sep 29, 2016 8:06 am    Post subject: Reply with quote

modnaruved,

Your dev entries were mostly created on 20 Sep, but not null, which dates from the fix,
Code:
crw-rw-rw-   1 root root    1,   3 Sep 29 00:12 null
crw-------   1 root root   10, 144 Sep 20 19:57 nvram


We also see that
Code:
brw-rw----   1 root disk    8,   7 Sep 27 20:13 sda7
, so you added sda7 at that time and the /dev node wan added too.

My /dev dates from my install date, May 12 2013. I know I have a static /dev as that was a deliberate decision on my part.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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modnaruved
Tux's lil' helper
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Joined: 21 Mar 2011
Posts: 144

PostPosted: Thu Sep 29, 2016 11:25 am    Post subject: Reply with quote

NeddySeagoon wrote:
modnaruved,

Your dev entries were mostly created on 20 Sep, but not null, which dates from the fix,
Code:
crw-rw-rw-   1 root root    1,   3 Sep 29 00:12 null
crw-------   1 root root   10, 144 Sep 20 19:57 nvram


We also see that
Code:
brw-rw----   1 root disk    8,   7 Sep 27 20:13 sda7
, so you added sda7 at that time and the /dev node wan added too.

My /dev dates from my install date, May 12 2013. I know I have a static /dev as that was a deliberate decision on my part.

sda7 is just swap: sometime (but not at Sep 27) I do this:
Code:
sudo sh -c "swapoff -a ; swapon -a"

to reset performance and memory issues

I don't know why my dev not in install date. How to fix it or check what change it?

my fstab and mount:
Code:
# /etc/fstab: static file system information.
#
# noatime turns off atimes for increased performance (atimes normally aren't
# needed); notail increases performance of ReiserFS (at the expense of storage
# efficiency).  It's safe to drop the noatime options if you want and to
# switch between notail / tail freely.
#
# The root filesystem should have a pass number of either 0 or 1.
# All other filesystems should have a pass number of 0 or greater than 1.
#
# See the manpage fstab(5) for more information.
#

# <fs>                  <mountpoint>    <type>          <opts>          <dump/pass>

# NOTE: If your BOOT partition is ReiserFS, add the notail option to opts.
/dev/sda6               /boot           ext2            noauto,noatime  1 2
/dev/sda8               /               ext4            noatime         0 1
/dev/sda7               none            swap            sw              0 0
/dev/cdrom              /mnt/cdrom      auto            noauto,ro       0 0
#/dev/fd0               /mnt/floppy     auto            noauto          0 0
/dev/sda9               /home           ext4            defaults,noatime  0 0
/dev/sda10              /mnt/hdata1     ext4            defaults,noatime 0 0
/dev/sda11              /mnt/hdata2     ext4            defaults,noatime 0 0

/dev/sdb1               /mnt/mdata1     ext4            defaults,noatime 0 0
/dev/sdb2               /mnt/mdata2     ext4            defaults,noatime 0 0

#tmpfs-apc               /mnt/appcache  tmpfs           defaults,nodev,nosuid,mode=1777,size=10m  0      0

mount
/dev/sda8 on / type ext4 (rw,noatime,data=ordered)
devtmpfs on /dev type devtmpfs (rw,nosuid,relatime,size=10240k,nr_inodes=685256,mode=755)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run type tmpfs (rw,nodev,relatime,size=548440k,mode=755)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620)
shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
cgroup_root on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,relatime,size=10240k,mode=755)
openrc on /sys/fs/cgroup/openrc type cgroup (rw,nosuid,nodev,noexec,relatime,release_agent=/lib64/rc/sh/cgroup-release-agent.sh,name=openrc)
cpuset on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cpu on /sys/fs/cgroup/cpu type cgroup (rw,nosuid,nodev,noexec,relatime,cpu)
cpuacct on /sys/fs/cgroup/cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct)
freezer on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
/dev/sda9 on /home type ext4 (rw,noatime,data=ordered)
/dev/sda10 on /mnt/hdata1 type ext4 (rw,noatime,data=ordered)
/dev/sda11 on /mnt/hdata2 type ext4 (rw,noatime,data=ordered)
/dev/sdb1 on /mnt/mdata1 type ext4 (rw,noatime,data=ordered)
/dev/sdb2 on /mnt/mdata2 type ext4 (rw,noatime,data=ordered)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nosuid,nodev,noexec,relatime)
none on /run/user/1000 type tmpfs (rw,relatime,mode=700,uid=1000)




Thanks for information.
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NeddySeagoon
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PostPosted: Thu Sep 29, 2016 11:44 am    Post subject: Reply with quote

modnaruved,

mount:
devtmpfs on /dev type devtmpfs (rw,nosuid,relatime,size=10240k,nr_inodes=685256,mode=755)


Your /dev is not supposed to be on your install date. The above fragment shows devtmpfs in use, so your /dev is recreated in RAM each boot and then dynamically maintained.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.
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modnaruved
Tux's lil' helper
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Joined: 21 Mar 2011
Posts: 144

PostPosted: Thu Sep 29, 2016 11:51 am    Post subject: Reply with quote

NeddySeagoon wrote:
modnaruved,

mount:
devtmpfs on /dev type devtmpfs (rw,nosuid,relatime,size=10240k,nr_inodes=685256,mode=755)


Your /dev is not supposed to be on your install date. The above fragment shows devtmpfs in use, so your /dev is recreated in RAM each boot and then dynamically maintained.

Suppose, most users has similar configuration as mine, but in my case Gentoo is installed approx. in 2014
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