[gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?

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* [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?
@ 2013-08-25 18:26 meino.cramer
  2013-08-25 19:43 ` Alan McKinnon
  2013-08-25 19:45 ` Pavel Volkov
  0 siblings, 2 replies; 10+ messages in thread
From: meino.cramer @ 2013-08-25 18:26 UTC (permalink / raw
  To: Gentoo

Hi,

In the kernel config I set

    CONFIG_RTC_HCTOSYS_DEVICE="rtc1"

and I grepped through /etc and looked 
for something suspicious...nothing found.

So...which ghost in my system dares to set
the symlink /dev/rtc to point to /dev/rtc0
instead of /dev/rtc1 ???

Any ides?

Best regards,
mcc

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?
  2013-08-25 18:26 [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ? meino.cramer
@ 2013-08-25 19:43 ` Alan McKinnon
  2013-08-26  3:04   ` meino.cramer
  2013-08-25 19:45 ` Pavel Volkov
  1 sibling, 1 reply; 10+ messages in thread
From: Alan McKinnon @ 2013-08-25 19:43 UTC (permalink / raw
  To: gentoo-user

On 25/08/2013 20:26, meino.cramer@gmx.de wrote:
> Hi,
> 
> In the kernel config I set
> 
>     CONFIG_RTC_HCTOSYS_DEVICE="rtc1"
> 
> and I grepped through /etc and looked 
> for something suspicious...nothing found.
> 
> So...which ghost in my system dares to set
> the symlink /dev/rtc to point to /dev/rtc0
> instead of /dev/rtc1 ???


You say there's a ghost in the machine, and the instant answer "udev"
did not immediately jump into your mind?

tut, tut (such an obvious target)   :-)


grep through every file installed by udev for "rtc", let's see what
comes out


-- 
Alan McKinnon
alan.mckinnon@gmail.com



^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?
  2013-08-25 19:43 ` Alan McKinnon
@ 2013-08-26  3:04   ` meino.cramer
  2013-08-26  6:00     ` Alan McKinnon
  0 siblings, 1 reply; 10+ messages in thread
From: meino.cramer @ 2013-08-26  3:04 UTC (permalink / raw
  To: gentoo-user

Alan McKinnon <alan.mckinnon@gmail.com> [13-08-26 04:34]:
> On 25/08/2013 20:26, meino.cramer@gmx.de wrote:
> > Hi,
> > 
> > In the kernel config I set
> > 
> >     CONFIG_RTC_HCTOSYS_DEVICE="rtc1"
> > 
> > and I grepped through /etc and looked 
> > for something suspicious...nothing found.
> > 
> > So...which ghost in my system dares to set
> > the symlink /dev/rtc to point to /dev/rtc0
> > instead of /dev/rtc1 ???
> 
> 
> You say there's a ghost in the machine, and the instant answer "udev"
> did not immediately jump into your mind?
> 
> tut, tut (such an obvious target)   :-)
> 
> 
> grep through every file installed by udev for "rtc", let's see what
> comes out
> 
> 
> -- 
> Alan McKinnon
> alan.mckinnon@gmail.com
> 
> 

Hi Alan,

carefully read my posting again.... ;)

Best regards,
mcc




^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?
  2013-08-26  3:04   ` meino.cramer
@ 2013-08-26  6:00     ` Alan McKinnon
  0 siblings, 0 replies; 10+ messages in thread
From: Alan McKinnon @ 2013-08-26  6:00 UTC (permalink / raw
  To: gentoo-user

On 26/08/2013 05:04, meino.cramer@gmx.de wrote:
> Alan McKinnon <alan.mckinnon@gmail.com> [13-08-26 04:34]:
>> On 25/08/2013 20:26, meino.cramer@gmx.de wrote:
>>> Hi,
>>>
>>> In the kernel config I set
>>>
>>>     CONFIG_RTC_HCTOSYS_DEVICE="rtc1"
>>>
>>> and I grepped through /etc and looked 
>>> for something suspicious...nothing found.
>>>
>>> So...which ghost in my system dares to set
>>> the symlink /dev/rtc to point to /dev/rtc0
>>> instead of /dev/rtc1 ???
>>
>>
>> You say there's a ghost in the machine, and the instant answer "udev"
>> did not immediately jump into your mind?
>>
>> tut, tut (such an obvious target)   :-)
>>
>>
>> grep through every file installed by udev for "rtc", let's see what
>> comes out
>>
>>
>> -- 
>> Alan McKinnon
>> alan.mckinnon@gmail.com
>>
>>
> 
> Hi Alan,
> 
> carefully read my posting again.... ;)


It was in /lib/ ?


-- 
Alan McKinnon
alan.mckinnon@gmail.com



^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?
  2013-08-25 18:26 [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ? meino.cramer
  2013-08-25 19:43 ` Alan McKinnon
@ 2013-08-25 19:45 ` Pavel Volkov
  2013-08-25 20:51   ` Philip Webb
  1 sibling, 1 reply; 10+ messages in thread
From: Pavel Volkov @ 2013-08-25 19:45 UTC (permalink / raw
  To: gentoo-user

On Sunday 25 August 2013 20:26:32 meino.cramer@gmx.de wrote:
> Hi,
> 
> In the kernel config I set
> 
>     CONFIG_RTC_HCTOSYS_DEVICE="rtc1"
> 
> and I grepped through /etc and looked
> for something suspicious...nothing found.
> 
> So...which ghost in my system dares to set
> the symlink /dev/rtc to point to /dev/rtc0
> instead of /dev/rtc1 ???
> 
> Any ides?
> 

I bet it's /usr/lib64/udev/rules.d/50-udev-default.rules


^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?
  2013-08-25 19:45 ` Pavel Volkov
@ 2013-08-25 20:51   ` Philip Webb
  2013-08-26  3:30     ` meino.cramer
  0 siblings, 1 reply; 10+ messages in thread
From: Philip Webb @ 2013-08-25 20:51 UTC (permalink / raw
  To: gentoo-user

130825 Pavel Volkov suggested:
> On Sunday 25 August 2013 20:26:32 meino.cramer@gmx.de asked:
>> So...which ghost in my system dares to set the symlink  /dev/rtc
>> to point to  /dev/rtc0  instead of  /dev/rtc1  ???
> I bet it's /usr/lib64/udev/rules.d/50-udev-default.rules

I have  /usr/udev/rules.d/50-udev-default.rules  (on a 64-bit system),
which contains the lines :

  # select "system RTC" or just use the first one
  SUBSYSTEM=="rtc", ATTR{hctosys}=="1", SYMLINK+="rtc"
  SUBSYSTEM=="rtc", KERNEL=="rtc0", SYMLINK+="rtc", OPTIONS+="link_priority=-100"
  
However, in  /dev  I have :

  crw------- 1 root root 10, 135 Aug 25 07:39 /dev/rtc
  
ie it's not a symlink.  I'm using  udev-204 .

HTH

-- 
========================,,============================================
SUPPORT     ___________//___,   Philip Webb
ELECTRIC   /] [] [] [] [] []|   Cities Centre, University of Toronto
TRANSIT    `-O----------O---'   purslowatchassdotutorontodotca



^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?
  2013-08-25 20:51   ` Philip Webb
@ 2013-08-26  3:30     ` meino.cramer
  2013-08-26  4:22       ` William Kenworthy
                         ` (2 more replies)
  0 siblings, 3 replies; 10+ messages in thread
From: meino.cramer @ 2013-08-26  3:30 UTC (permalink / raw
  To: gentoo-user

Philip Webb <purslow@ca.inter.net> [13-08-26 04:35]:
> 130825 Pavel Volkov suggested:
> > On Sunday 25 August 2013 20:26:32 meino.cramer@gmx.de asked:
> >> So...which ghost in my system dares to set the symlink  /dev/rtc
> >> to point to  /dev/rtc0  instead of  /dev/rtc1  ???
> > I bet it's /usr/lib64/udev/rules.d/50-udev-default.rules
> 
> I have  /usr/udev/rules.d/50-udev-default.rules  (on a 64-bit system),
> which contains the lines :
> 
>   # select "system RTC" or just use the first one
>   SUBSYSTEM=="rtc", ATTR{hctosys}=="1", SYMLINK+="rtc"
>   SUBSYSTEM=="rtc", KERNEL=="rtc0", SYMLINK+="rtc", OPTIONS+="link_priority=-100"
>   
> However, in  /dev  I have :
> 
>   crw------- 1 root root 10, 135 Aug 25 07:39 /dev/rtc
>   
> ie it's not a symlink.  I'm using  udev-204 .
> 
> HTH
> 
> -- 
> ========================,,============================================
> SUPPORT     ___________//___,   Philip Webb
> ELECTRIC   /] [] [] [] [] []|   Cities Centre, University of Toronto
> TRANSIT    `-O----------O---'   purslowatchassdotutorontodotca
> 
> 

Hi,

I finally found the culprit:

There udev-related files under /lib, where I did not search for it.
I had expected them under /etc...
I fixed one of the rules and now there is the correct link.

Nonetheless, ls -l /proc shows:
beagleboneblack:/root>ls -l /proc
total 0
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 1
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 10
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 11
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 12
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 13
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 14
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 15
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 16
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 17
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 18
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 188
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 19
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 196
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 2
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 20
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 21
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 24
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 27
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 3
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 36
dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 362
dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 363
dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 364
dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 365
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 38
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 39
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 40
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 41
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 42
dr-xr-xr-x   8 messagebus messagebus     0 2013-08-26 05:12 436
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 45
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 46
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 5
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 53
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 55
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 56
dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 612
dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 632
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 69
dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 698
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 7
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 70
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 71
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 74
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 75
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 76
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 79
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 8
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 80
dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 800
dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 855
dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 882
dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 883
dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 884
dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 885
dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 886
dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 887
dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 896
dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 9
dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 900
dr-xr-xr-x   8 root       root           0 2013-08-26 05:28 917
dr-xr-xr-x   8 root       root           0 2013-08-26 05:28 955
dr-xr-xr-x   8 root       root           0 2013-08-26 05:28 966
dr-xr-xr-x   4 root       root           0 2013-08-26 05:28 asound
-r--r--r--   1 root       root           0 2013-08-26 05:28 buddyinfo
dr-xr-xr-x   3 root       root           0 2013-08-26 05:28 bus
-r--r--r--   1 root       root           0 2013-08-26 05:28 cgroups
-r--r--r--   1 root       root           0 2013-08-26 05:28 cmdline
-r--r--r--   1 root       root       26642 2013-08-26 05:28 config.gz
-r--r--r--   1 root       root           0 2013-08-26 05:28 consoles
dr-xr-xr-x   2 root       root           0 2013-08-26 05:28 cpu
-r--r--r--   1 root       root           0 2013-08-26 05:28 cpuinfo
-r--r--r--   1 root       root           0 2013-08-26 05:28 crypto
dr-xr-xr-x  12 root       root           0 2013-08-26 05:28 device-tree

There are still files stamped with the UNIX's big bang moment.
But the kernel is configured to use rtc1 instead of rtc0.

The journey isn't at its end, still.

ANy further ideas ?

Best regards,
mcc





^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?
  2013-08-26  3:30     ` meino.cramer
@ 2013-08-26  4:22       ` William Kenworthy
  2013-08-26  6:00       ` Alan McKinnon
  2013-08-26  7:10       ` Neil Bothwick
  2 siblings, 0 replies; 10+ messages in thread
From: William Kenworthy @ 2013-08-26  4:22 UTC (permalink / raw
  To: gentoo-user

On 26/08/13 11:30, meino.cramer@gmx.de wrote:
> Philip Webb <purslow@ca.inter.net> [13-08-26 04:35]:
>> 130825 Pavel Volkov suggested:
>>> On Sunday 25 August 2013 20:26:32 meino.cramer@gmx.de asked:
>>>> So...which ghost in my system dares to set the symlink  /dev/rtc
>>>> to point to  /dev/rtc0  instead of  /dev/rtc1  ???
>>> I bet it's /usr/lib64/udev/rules.d/50-udev-default.rules
>>
>> I have  /usr/udev/rules.d/50-udev-default.rules  (on a 64-bit system),
>> which contains the lines :
>>
>>   # select "system RTC" or just use the first one
>>   SUBSYSTEM=="rtc", ATTR{hctosys}=="1", SYMLINK+="rtc"
>>   SUBSYSTEM=="rtc", KERNEL=="rtc0", SYMLINK+="rtc", OPTIONS+="link_priority=-100"
>>   
>> However, in  /dev  I have :
>>
>>   crw------- 1 root root 10, 135 Aug 25 07:39 /dev/rtc
>>   
>> ie it's not a symlink.  I'm using  udev-204 .
>>
>> HTH
>>
>> -- 
>> ========================,,============================================
>> SUPPORT     ___________//___,   Philip Webb
>> ELECTRIC   /] [] [] [] [] []|   Cities Centre, University of Toronto
>> TRANSIT    `-O----------O---'   purslowatchassdotutorontodotca
>>
>>
> 
> Hi,
> 
> I finally found the culprit:
> 
> There udev-related files under /lib, where I did not search for it.
> I had expected them under /etc...
> I fixed one of the rules and now there is the correct link.
> 
> Nonetheless, ls -l /proc shows:
> beagleboneblack:/root>ls -l /proc
> total 0
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 1
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 10
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 11
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 12
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 13
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 14
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 15
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 16
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 17
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 18
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 188
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 19
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 196
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 2
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 20
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 21
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 24
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 27
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 3
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 36
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 362
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 363
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 364
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 365
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 38
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 39
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 40
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 41
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 42
> dr-xr-xr-x   8 messagebus messagebus     0 2013-08-26 05:12 436
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 45
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 46
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 5
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 53
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 55
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 56
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 612
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 632
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 69
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 698
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 7
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 70
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 71
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 74
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 75
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 76
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 79
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 8
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 80
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 800
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 855
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 882
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 883
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 884
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 885
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 886
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 887
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 896
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 9
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 900
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:28 917
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:28 955
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:28 966
> dr-xr-xr-x   4 root       root           0 2013-08-26 05:28 asound
> -r--r--r--   1 root       root           0 2013-08-26 05:28 buddyinfo
> dr-xr-xr-x   3 root       root           0 2013-08-26 05:28 bus
> -r--r--r--   1 root       root           0 2013-08-26 05:28 cgroups
> -r--r--r--   1 root       root           0 2013-08-26 05:28 cmdline
> -r--r--r--   1 root       root       26642 2013-08-26 05:28 config.gz
> -r--r--r--   1 root       root           0 2013-08-26 05:28 consoles
> dr-xr-xr-x   2 root       root           0 2013-08-26 05:28 cpu
> -r--r--r--   1 root       root           0 2013-08-26 05:28 cpuinfo
> -r--r--r--   1 root       root           0 2013-08-26 05:28 crypto
> dr-xr-xr-x  12 root       root           0 2013-08-26 05:28 device-tree
> 
> There are still files stamped with the UNIX's big bang moment.
> But the kernel is configured to use rtc1 instead of rtc0.
> 
> The journey isn't at its end, still.
> 
> ANy further ideas ?
> 
> Best regards,
> mcc
> 
> 
>

Does it make a difference ...?  While I can see an advantage for files
that need the correct date to have them, in my experience that for most
files its irrelevant including those in /dev.  The Rpi doest care (and
its interesting to see what files the Rpi is actually using as they
update :) - I just use ntp to set the system time and dont seem to have
any problems - so what problem do the older files actually cause?

You could use a "find" command identify then "touch" the files and
update their timestamp once the system is up/before whatever is critical
starts.

BillK




^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?
  2013-08-26  3:30     ` meino.cramer
  2013-08-26  4:22       ` William Kenworthy
@ 2013-08-26  6:00       ` Alan McKinnon
  2013-08-26  7:10       ` Neil Bothwick
  2 siblings, 0 replies; 10+ messages in thread
From: Alan McKinnon @ 2013-08-26  6:00 UTC (permalink / raw
  To: gentoo-user

On 26/08/2013 05:30, meino.cramer@gmx.de wrote:
> Philip Webb <purslow@ca.inter.net> [13-08-26 04:35]:
>> 130825 Pavel Volkov suggested:
>>> On Sunday 25 August 2013 20:26:32 meino.cramer@gmx.de asked:
>>>> So...which ghost in my system dares to set the symlink  /dev/rtc
>>>> to point to  /dev/rtc0  instead of  /dev/rtc1  ???
>>> I bet it's /usr/lib64/udev/rules.d/50-udev-default.rules
>>
>> I have  /usr/udev/rules.d/50-udev-default.rules  (on a 64-bit system),
>> which contains the lines :
>>
>>   # select "system RTC" or just use the first one
>>   SUBSYSTEM=="rtc", ATTR{hctosys}=="1", SYMLINK+="rtc"
>>   SUBSYSTEM=="rtc", KERNEL=="rtc0", SYMLINK+="rtc", OPTIONS+="link_priority=-100"
>>   
>> However, in  /dev  I have :
>>
>>   crw------- 1 root root 10, 135 Aug 25 07:39 /dev/rtc
>>   
>> ie it's not a symlink.  I'm using  udev-204 .
>>
>> HTH
>>
>> -- 
>> ========================,,============================================
>> SUPPORT     ___________//___,   Philip Webb
>> ELECTRIC   /] [] [] [] [] []|   Cities Centre, University of Toronto
>> TRANSIT    `-O----------O---'   purslowatchassdotutorontodotca
>>
>>
> 
> Hi,
> 
> I finally found the culprit:
> 
> There udev-related files under /lib, where I did not search for it.
> I had expected them under /etc...
> I fixed one of the rules and now there is the correct link.
> 
> Nonetheless, ls -l /proc shows:
> beagleboneblack:/root>ls -l /proc
> total 0
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 1
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 10
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 11
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 12
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 13
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 14
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 15
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 16
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 17
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 18
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 188
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 19
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 196
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 2
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 20
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 21
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 24
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 27
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 3
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 36
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 362
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 363
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 364
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 365
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 38
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 39
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 40
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 41
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 42
> dr-xr-xr-x   8 messagebus messagebus     0 2013-08-26 05:12 436
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 45
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 46
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 5
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 53
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 55
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 56
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 612
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 632
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 69
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 698
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 7
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 70
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 71
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 74
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 75
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 76
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 79
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 8
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 80
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 800
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:12 855
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 882
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 883
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 884
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 885
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 886
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 887
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 896
> dr-xr-xr-x   8 root       root           0 1970-01-01 01:00 9
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:13 900
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:28 917
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:28 955
> dr-xr-xr-x   8 root       root           0 2013-08-26 05:28 966
> dr-xr-xr-x   4 root       root           0 2013-08-26 05:28 asound
> -r--r--r--   1 root       root           0 2013-08-26 05:28 buddyinfo
> dr-xr-xr-x   3 root       root           0 2013-08-26 05:28 bus
> -r--r--r--   1 root       root           0 2013-08-26 05:28 cgroups
> -r--r--r--   1 root       root           0 2013-08-26 05:28 cmdline
> -r--r--r--   1 root       root       26642 2013-08-26 05:28 config.gz
> -r--r--r--   1 root       root           0 2013-08-26 05:28 consoles
> dr-xr-xr-x   2 root       root           0 2013-08-26 05:28 cpu
> -r--r--r--   1 root       root           0 2013-08-26 05:28 cpuinfo
> -r--r--r--   1 root       root           0 2013-08-26 05:28 crypto
> dr-xr-xr-x  12 root       root           0 2013-08-26 05:28 device-tree
> 
> There are still files stamped with the UNIX's big bang moment.
> But the kernel is configured to use rtc1 instead of rtc0.
> 
> The journey isn't at its end, still.
> 
> ANy further ideas ?
> 
> Best regards,
> mcc

Does it really matter ?

Those files with Epoch timestamps are PIDs started very early. They are
probably kernel threads exposed as PIDs anyway, and there's serious
magic going on to make that all work. It all happens after init starts
but before your rtc gets set and ntp starts.

You seem to have accomplished the bits that matter and are now chasing
after other bits that don't. I say it's time to stop and say it's good
enough

Consider this: that cpu has an rtc on-board, it has no battery. Every OS
in existence is going to have the same issue in some form or other, and
yet it doesn't seem to matter as stuff works.


-- 
Alan McKinnon
alan.mckinnon@gmail.com



^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ?
  2013-08-26  3:30     ` meino.cramer
  2013-08-26  4:22       ` William Kenworthy
  2013-08-26  6:00       ` Alan McKinnon
@ 2013-08-26  7:10       ` Neil Bothwick
  2 siblings, 0 replies; 10+ messages in thread
From: Neil Bothwick @ 2013-08-26  7:10 UTC (permalink / raw
  To: gentoo-user

[-- Attachment #1: Type: text/plain, Size: 473 bytes --]

On Mon, 26 Aug 2013 05:30:12 +0200, meino.cramer@gmx.de wrote:

> There udev-related files under /lib, where I did not search for it.

That's where udev's own rules live.

> I had expected them under /etc...

That's where user rules live.

> I fixed one of the rules and now there is the correct link.

For now. Copy the rule to /etc/ if you don't want it overwritten by the
next udev update.


-- 
Neil Bothwick

Who messed with my anti-paranoia shot?

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 198 bytes --]

^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2013-08-26  7:11 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2013-08-25 18:26 [gentoo-user] Who sets the symlink /dev/rtc => /dev/rtc0 ? meino.cramer
2013-08-25 19:43 ` Alan McKinnon
2013-08-26  3:04   ` meino.cramer
2013-08-26  6:00     ` Alan McKinnon
2013-08-25 19:45 ` Pavel Volkov
2013-08-25 20:51   ` Philip Webb
2013-08-26  3:30     ` meino.cramer
2013-08-26  4:22       ` William Kenworthy
2013-08-26  6:00       ` Alan McKinnon
2013-08-26  7:10       ` Neil Bothwick

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