[systemd-devel] Again, why this strange behavior implied by "auto" in fstab ?

[Reindl Harald]

Am 23.01.2018 um 20:09 schrieb Mike Gilbert:
> On Tue, Jan 23, 2018 at 10:54 AM, Reindl Harald <h.reindl at thelounge.net> wrote:
>>> Am I right in thinking this is only done if the filesystem is not declared
>>> as noauto in fstab?
>>
>> with Fedora 27 (yesterday upgraded) systemd even don't leave "noauto"
>> mount-point in peace and spits the "Failed to read symlink target for
>> /mnt/arrakis: Permission denied" for fuse-mountpoints multiple times each
>> day into the systemlogs (systemd-234-9.fc27.x86_64)
>>
>> [root at srv-rhsoft:~]$ systemctl daemon-reload
>>
>> [root at srv-rhsoft:~]$ cat messages
>> Jan 23 16:52:16 srv-rhsoft systemd-fstab-generator[27644]: Failed to read
>> symlink target for /mnt/arrakis: Permission denied
>>
>> [root at srv-rhsoft:~]$ cat /etc/fstab | grep /mnt/arrakis
>> sshfs#reindl at arrakis:/ /mnt/arrakis                       fuse
>> noauto,user,rw,noexec,nosuid,nodev,noatime,uid=harry
> 
> Sounds like you have a broken symlink at /mnt or /mnt/arrakis. systemd
> is trying to deference said symlink when it generates the mount unit
> for that fstab entry

no - it's how fuse-mountpoints simply work

nobody but the user which mounted is has access and hence systemd should 
leave fuse-mountpoints with "noauto" completly in peace as well as any 
"noauto" stuff or manual mounted filesystems

you can see mount-unit failures on CentOS7 as example when you unmount 
your manually mounted luks-on-raid10 storage with no entry in fstab at all

[root at srv-rhsoft:~]$ stat /mnt/arrakis
stat: cannot stat '/mnt/arrakis': Permission denied

[harry at srv-rhsoft:~]$ stat /mnt/arrakis
   File: /mnt/arrakis
   Size: 16384           Blocks: 32         IO Block: 4096   directory
Device: 48h/72d Inode: 1           Links: 1
Access: (0755/drwxr-xr-x)  Uid: (  500/   harry)   Gid: (  501/verwaltung)
Access: 2018-01-23 21:15:02.000000000 +0100
Modify: 2017-12-21 15:07:12.000000000 +0100
Change: 2017-12-21 15:07:12.000000000 +0100
  Birth: -