Redhat support found a reason - a bug it glibc which was fixed just a
couple of weeks ago
2017-04-19 21:15 GMT-04:00 Grzegorz Powiedziuk <gpowiedz...@gmail.com>:
> Reboot didn't resolve the issue. I will have to open a ticket with redhat.
> hopefully they can figure this out
> Gregory
>
> 2017-04-18 23:31 GMT-04:00 Grzegorz Powiedziuk <gpowiedz...@gmail.com>:
>
>> 2017-04-18 16:34 GMT-04:00 Alan Altmark <alan_altm...@us.ibm.com>:
>>
>>> On Monday, 04/17/2017 at 03:14 GMT, Grzegorz Powiedziuk
>>> <gpowiedz...@gmail.com> wrote:
>>> > I am having a really weird issue on one of the z redhat systems.
>>> Probably
>>> > it doesn't have anything to do with Z but we have some great minds here
>>> so
>>> > perhaps someone will help me
>>> >
>>> > the "df -h" or "df -P" command doesn't work when run as a normal user.
>>> > "df" on it's own works fine.
>>> >
>>> > Error:
>>> > df: cannot read table of mounted file systems: Permission denied
>>> >
>>> > Now, here is when it gets really strange. Above suggests wrong
>>> permissions
>>> > on /etc/mtab which are fine:
>>> > [root@it069qz5ora lib64]# ls -la /etc/mtab
>>> > -rw-r--r-- 1 root root 2024 Apr 17 10:44 /etc/mtab
>>> >
>>> > But the "df -h" is trying to open that file with WRITE access mode !!!
>>> > strace df -h 2>&1 |grep open | grep mtab
>>> > ...
>>> > open("/etc/mtab", O*_RDWR*|O_CLOEXEC) = -1 EACCES (Permission
>>> denied)
>>> >
>>> > On all other systems"df -h" opens that mtab file in O_RDONLY. Why this
>>> one
>>> > is different?
>>> >
>>> > And as I said, regular "df" works fine and it usies O_RDONLY flag.
>>> >
>>> > So the problem happens only with "df -h" or "df -P" . That doesn't make
>>> any
>>> > sense to me.
>>> >
>>> > Has anyone seen anything like that?
>>>
>>> Weird. The read_file_system_list() routine in mountlist.c (called by
>>> df.c) code shows a hard-coded "r" option in the fopen(), and I don't see
>>> df calling some other "mount list" function because of -h or -P.
>>>
>>> Alan Altmark
>>>
>>
>>
>> I know .. doesn't make sense. Thanks for looking into source code. I
>> wonder if something has change in the code in the
>> newer versions of this package. Tomorrow in the evening I will reboot
>> this guy. Hopefully this will fix it.
>>
>> Aha, forgot to say. I've changed permissions of mtab file to 666 for a
>> moment just to make sure that this is the problem and of course it worked
>> this time.
>>
>> Gregory
>>
>>
>
----------------------------------------------------------------------
For LINUX-390 subscribe / signoff / archive access instructions,
send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit
http://www.marist.edu/htbin/wlvindex?LINUX-390
----------------------------------------------------------------------
For more information on Linux on System z, visit
http://wiki.linuxvm.org/
