bug#21011: df utility

[Eric Benton]

Here you go -

~ #   ls -l /etc/mtab
lrwxrwxrwx 1 root root 17 Oct 22  2014 /etc/mtab -> /proc/self/mounts
~ #
~ #   cat /etc/mtab
devtmpfs /dev devtmpfs 
rw,relatime,size=4021028k,nr_inodes=1005257,mode=755 0 0
tmpfs /dev/shm tmpfs rw,relatime 0 0
tmpfs /run tmpfs rw,nosuid,nodev,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,gid=5,mode=620,ptmxmode=000 0 0
/dev/sda3 / ext4 rw,relatime,discard,data=ordered 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
securityfs /sys/kernel/security securityfs 
rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /sys/fs/cgroup tmpfs rw,nosuid,nodev,noexec,mode=755 0 0
cgroup /sys/fs/cgroup/systemd cgroup 
rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd 
0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
cgroup /sys/fs/cgroup/cpuset cgroup 
rw,nosuid,nodev,noexec,relatime,cpuset 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup 
rw,nosuid,nodev,noexec,relatime,cpu,cpuacct 0 0
cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
cgroup /sys/fs/cgroup/memory cgroup 
rw,nosuid,nodev,noexec,relatime,memory 0 0
cgroup /sys/fs/cgroup/devices cgroup 
rw,nosuid,nodev,noexec,relatime,devices 0 0
cgroup /sys/fs/cgroup/freezer cgroup 
rw,nosuid,nodev,noexec,relatime,freezer 0 0
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup 
rw,nosuid,nodev,noexec,relatime,net_cls,net_prio 0 0
cgroup /sys/fs/cgroup/perf_event cgroup 
rw,nosuid,nodev,noexec,relatime,perf_event 0 0
cgroup /sys/fs/cgroup/hugetlb cgroup 
rw,nosuid,nodev,noexec,relatime,hugetlb 0 0
systemd-1 /proc/sys/fs/binfmt_misc autofs 
rw,relatime,fd=29,pgrp=1,timeout=300,minproto=5,maxproto=5,direct 0 0
mqueue /dev/mqueue mqueue rw,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
hugetlbfs /dev/hugepages hugetlbfs rw,relatime 0 0
tmpfs /var/run tmpfs rw,nosuid,nodev,relatime,mode=755 0 0
tmpfs /var/lock tmpfs rw,nosuid,nodev,relatime,mode=755 0 0


On 07/08/2015 03:54 PM, Bob Proulx wrote:
> erbenton wrote:
> > df: ‘/sys/kernel/debug/tracing’: Permission denied
> > ...
> > Still the same issue, using df from a non-root account always
> > results in permission denied warning which messes with scripts that
> > use df.  strace shows that even with -x debugfs or -x sysfs that df
> > is still probing /sys
> Could you also provide information on /etc/mtab and the contents
> of it?  I expect /etc/mtab is a symlink to /proc/mounts but I am
> curious about the /sys entries that are in it.
>
>    ls -l /etc/mtab
>
>    cat /etc/mtab
>
> Thanks,
> Bob

--
Thanks
Eric
Olympia WA
KG7RYU