[Bug 1758911] Re: Watchdog package is messing up the /dev/rtc file causing timedatectl to fail
Petr Ruzicka
petr.ruzicka at gmail.com
Tue Mar 27 12:15:06 UTC 2018
** Description changed:
[Impact]
- * Once the watchdog package is installed, users can not use timedatectl, because watchdog package
- recreated /dev/rtc.
+ * Once the watchdog package is installed, users can not use timedatectl, because watchdog package
+ recreated /dev/rtc.
[Test Case]
* On a Ubuntu system:
- # Check the /dev/rtc* files:
- - ls -l /dev/rtc*
- lrwxrwxrwx 1 root root 4 Mar 26 10:38 /dev/rtc -> rtc0
- crw------- 1 root root 251, 0 Mar 26 10:38 /dev/rtc0
+ # Check the /dev/rtc* files:
+ - ls -l /dev/rtc*
+ lrwxrwxrwx 1 root root 4 Mar 26 10:38 /dev/rtc -> rtc0
+ crw------- 1 root root 251, 0 Mar 26 10:38 /dev/rtc0
- # Run timedatectl command:
- - timedatectl status
- Local time: Mon 2018-03-26 09:06:56 UTC
- Universal time: Mon 2018-03-26 09:06:56 UTC
- RTC time: Mon 2018-03-26 09:06:55
- Time zone: UTC (UTC, +0000)
- Network time on: yes
- NTP synchronized: yes
- RTC in local TZ: no
+ # Run timedatectl command:
+ - timedatectl status
+ Local time: Mon 2018-03-26 09:06:56 UTC
+ Universal time: Mon 2018-03-26 09:06:56 UTC
+ RTC time: Mon 2018-03-26 09:06:55
+ Time zone: UTC (UTC, +0000)
+ Network time on: yes
+ NTP synchronized: yes
+ RTC in local TZ: no
- # Install watchdog package:
- - apt-get update && apt-get install watchdog
+ # Install watchdog package:
+ - apt-get update && apt-get install watchdog
- # Check how the /dev/rtc* files looks now:
- - ls -l /dev/rtc*
- crw-rw---- 1 root root 10, 135 Mar 26 09:56 /dev/rtc
- crw------- 1 root root 251, 0 Mar 26 09:55 /dev/rtc0
+ # Check how the /dev/rtc* files looks now:
+ - ls -l /dev/rtc*
+ crw-rw---- 1 root root 10, 135 Mar 26 09:56 /dev/rtc
+ crw------- 1 root root 251, 0 Mar 26 09:55 /dev/rtc0
- # The timedatectl is failing because dbus can not work with /dev/rtc file now
- - timedatectl status
- Failed to query server: No such device
-
+ # The timedatectl is failing because dbus can not work with /dev/rtc file now
+ - timedatectl status
+ Failed to query server: No such device
[Regression Potential]
It looks like there is a bug in the watchdog package in Ubuntu which breaks timedatectl to work properly.
-
- [Fix]
- The proper way how to fix is to modify the postinst script in watchdog package and replace all
- "MAKEDEV misc" with proper values.
+ [Problem description]
+ The "postinst" script in watchdog package call "MAKEDEV misc" which remove /dev/rtc symlink and create "bad" /dev/rtc character device.
```
- if [ -x "`which MAKEDEV`" ]; then
- # do we have to create the device?
- if [ ! -c /dev/watchdog ]
- then
- (cd /dev; MAKEDEV misc || true)
- fi
+ if [ -x "`which MAKEDEV`" ]; then
+ # do we have to create the device?
+ if [ ! -c /dev/watchdog ]
+ then
+ (cd /dev; MAKEDEV misc || true)
+ fi
- # do we have to create the temperature device?
- if [ ! -c /dev/temperature ]
- then
- (cd /dev; MAKEDEV misc || true)
- fi
- fi
+ # do we have to create the temperature device?
+ if [ ! -c /dev/temperature ]
+ then
+ (cd /dev; MAKEDEV misc || true)
+ fi
+ fi
```
-
- to
-
- ```
- if [ -x "`which MAKEDEV`" ]; then
- # do we have to create the device?
- if [ ! -c /dev/watchdog ]
- then
- (cd /dev; MAKEDEV watchdog || true)
- fi
-
- # do we have to create the temperature device?
- if [ ! -c /dev/temperature ]
- then
- (cd /dev; MAKEDEV temperature || true)
- fi
- fi
- ```
--
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Foundations Bugs, which is subscribed to watchdog in Ubuntu.
https://bugs.launchpad.net/bugs/1758911
Title:
Watchdog package is messing up the /dev/rtc file causing timedatectl
to fail
Status in watchdog package in Ubuntu:
Confirmed
Bug description:
[Impact]
* Once the watchdog package is installed, users can not use timedatectl, because watchdog package
recreated /dev/rtc.
[Test Case]
* On a Ubuntu system:
# Check the /dev/rtc* files:
- ls -l /dev/rtc*
lrwxrwxrwx 1 root root 4 Mar 26 10:38 /dev/rtc -> rtc0
crw------- 1 root root 251, 0 Mar 26 10:38 /dev/rtc0
# Run timedatectl command:
- timedatectl status
Local time: Mon 2018-03-26 09:06:56 UTC
Universal time: Mon 2018-03-26 09:06:56 UTC
RTC time: Mon 2018-03-26 09:06:55
Time zone: UTC (UTC, +0000)
Network time on: yes
NTP synchronized: yes
RTC in local TZ: no
# Install watchdog package:
- apt-get update && apt-get install watchdog
# Check how the /dev/rtc* files looks now:
- ls -l /dev/rtc*
crw-rw---- 1 root root 10, 135 Mar 26 09:56 /dev/rtc
crw------- 1 root root 251, 0 Mar 26 09:55 /dev/rtc0
# The timedatectl is failing because dbus can not work with /dev/rtc file now
- timedatectl status
Failed to query server: No such device
[Regression Potential]
It looks like there is a bug in the watchdog package in Ubuntu which breaks timedatectl to work properly.
[Problem description]
The "postinst" script in watchdog package call "MAKEDEV misc" which remove /dev/rtc symlink and create "bad" /dev/rtc character device.
```
if [ -x "`which MAKEDEV`" ]; then
# do we have to create the device?
if [ ! -c /dev/watchdog ]
then
(cd /dev; MAKEDEV misc || true)
fi
# do we have to create the temperature device?
if [ ! -c /dev/temperature ]
then
(cd /dev; MAKEDEV misc || true)
fi
fi
```
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