[Bug 1905623] Re: df: /run/user/1000/doc: Operation not permitted

[Julian Andres Klode]

Just to note, a huge number of other file systems don't show:

$ grep fuse /proc/mounts 
fusectl /sys/fs/fuse/connections fusectl rw,nosuid,nodev,noexec,relatime 0 0
https://sd2dav.1und1.de/ /media/jak/smartdrive fuse rw,nosuid,nodev,noexec,relatime,user_id=1000,group_id=1000,allow_other,max_read=16384 0 0
gvfsd-fuse /run/user/1000/gvfs fuse.gvfsd-fuse rw,nosuid,nodev,relatime,user_id=1000,group_id=1000 0 0
portal /run/user/1000/doc fuse.portal rw,nosuid,nodev,relatime,user_id=1000,group_id=1000 0 0
keybase-redirector /keybase fuse ro,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
/dev/fuse /run/user/1000/keybase/kbfs fuse rw,nosuid,nodev,relatime,user_id=1000,group_id=1000 0 0
$ /usr/bin/df  -T | grep fuse
/usr/bin/df: /run/user/1000/doc: Operation not permitted
https://sd2dav.1und1.de/      fuse  1333333332 800000000 533333332  61% /media/jak/smartdrive
/dev/fuse                     fuse   262144000         1 262144000   1% /run/user/1000/keybase/kbfs

Looking at some of them:

$ stat -f /keybase/
  File: "/keybase/"
    ID: 0        Namelen: 0       Type: fuseblk
Block size: 0          Fundamental block size: 0
Blocks: Total: 0          Free: 0          Available: 0
Inodes: Total: 0          Free: 0

$ stat -f /run/user/1000/gvfs
  File: "/run/user/1000/gvfs"
    ID: 0        Namelen: 1024    Type: fuseblk
Block size: 4096       Fundamental block size: 4096
Blocks: Total: 0          Free: 0          Available: 0
Inodes: Total: 0          Free: 0

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https://bugs.launchpad.net/bugs/1905623

Title:
  df: /run/user/1000/doc: Operation not permitted

Status in coreutils package in Ubuntu:
  In Progress
Status in xdg-desktop-portal package in Ubuntu:
  Triaged

Bug description:
  /run/user/1000/doc is a fuse.portal mount point, but statfs() return
  EPERM, hence df produces an error message. Maybe statfs() is not
  implemented, but it would be good to quieten this down (df even does
  not allow me to ignore it, probably because it looks at statfs to find
  out fs type, so my fs type ignoring doesn't work).

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