I bet the reboot fixes it. I saw some weirdness with disks on a sles 12 server after kernel and more patching than magically resolved after reboot.
But you should dump it prior to reboot and send the dump off to your vendor. Marcy -----Original Message----- From: Grzegorz Powiedziuk [gpowiedz...@gmail.com<mailto:gpowiedz...@gmail.com>] Sent: Tuesday, April 18, 2017 10:32 PM Central Standard Time To: LINUX-390@VM.MARIST.EDU Subject: Re: [LINUX-390] /etc/mtab and "df -h" problem 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/
