Re: mount.davfs: program is not setuid root

[Efraim Flashner]

On Mon, Apr 19, 2021 at 08:47:08PM -0400, Leo Famulari wrote:
> On Mon, Apr 19, 2021 at 10:30:13PM +0200, Simon Streit wrote:
> > I just tried again, and called mount as:
> > --8<---------------cut here---------------start------------->8---
> > /run/setuid-programs/mount -t <URL> ~/test/
> > --8<---------------cut here---------------end--------------->8---
> > where URL is my remote URL share trying to mount it to local test dir,
> > where it fails with:
> > --8<---------------cut here---------------start------------->8---
> > /run/current-system/profile/sbin/mount.davfs: program is not setuid root
> > --8<---------------cut here---------------end--------------->8---
> 
> So, '/run/setuid-programs/mount' is somehow resolving to
> '/run/current-system/profile/sbin/mount.davfs'?
> 
> The executables in /run/setuid-programs are not supposed to be links.
> 

From the ./configure script in davfs2:

Some influential environment variables:
  CC          C compiler command
  CFLAGS      C compiler flags
  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
              nonstandard directory <lib dir>
  LIBS        libraries to pass to the linker, e.g. -l<library>
  CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
              you have headers in a nonstandard directory <include dir>
  CPP         C preprocessor
  dav_user    if invoked by root, mount.davfs runs as this user [davfs2]
  dav_group   the group, the mount.davfs daemon belongs to [davfs2]
  ssbindir    where mount will search for mount-helpers [/sbin]
  dav_localstatedir
              directory to store pid-files in [/var/run]
  dav_syscachedir
              cache directory [/var/cache]
  LINGUAS     select languages for messages and documentation

I've attached a diff against guix and also a davfs.scm for building just
the modified davfs2. Can you try building it with `guix build -f
davfs.scm` and then use the mount.davfs from there to try mounting your
davfs mountpoint?

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Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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davfs-adjust-setuid-directory.diff
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davfs.scm
Description: Text document

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