Public bug reported:
According to the mount(8) man page:
All options prefixed with "x-" are interpreted as comments or as
userspace application-specific options. These options are not stored
in the mtab file, nor sent to the mount.type helpers nor to the
mount(2) system call. The suggested format is x-appname.option (e.g.
x-systemd.automount).
However, adding any such option to cifs entry, such as "x-test.opt"
(other than x-systemd.automount) results in:
mount error(22): Invalid argument
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)
No options starting with "x-" should be passed to mount.cifs, so the
mount should succeed.
Running Ubuntu 16.04.3 LTS
mount package installed is 2.27.1-6ubuntu3.3
This error always happens when such an option is specified. Here is an example
fstab line that causes this failure:
//192.168.1.3/Public /mnt/mybook cifs
noauto,x-test.opt,rw,users,noperm,guest,soft,cache=none,sec=none 0 0
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: mount 2.27.1-6ubuntu3.3
ProcVersionSignature: Ubuntu 4.4.0-97.120-generic 4.4.87
Uname: Linux 4.4.0-97-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Oct 16 12:29:40 2017
InstallationDate: Installed on 2016-04-22 (542 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/usr/bin/tcsh
SourcePackage: util-linux
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: util-linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug fstab mount xenial
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https://bugs.launchpad.net/bugs/1724013
Title:
mount does not correctly process x-* options
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