[systemd-bugs] [Bug 89768] New: fstab-generator impedes mounting to a mountpoint specified in fstab when device specified in it in unplugged.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89768

            Bug ID: 89768
           Summary: fstab-generator impedes mounting to a mountpoint
                    specified in fstab when device specified in it in
                    unplugged.
           Product: systemd
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
          Assignee: systemd-bugs at lists.freedesktop.org
          Reporter: bugs.freedesktop.org at mailinator.net
        QA Contact: systemd-bugs at lists.freedesktop.org

Hi,

my /etc/fstab contains:
UUID=XXXX  /mnt ntfs noauto 0 0

systemd-fstab-generator thus creates a mnt.mount service :
● mnt.mount - /mnt                             
   Loaded: loaded (/etc/fstab)
   Active: inactive (dead)
    Where: /mnt
     What: /dev/disk/by-uuid/XXXX
     Docs: man:fstab(5)
           man:systemd-fstab-generator(8)

Issue is : Trying to mount (any other device) to this mountpoint when the
device UUID=XXXX is not plugged in, seems to succeed (mount returns 0, dmesg),
but doesn't.

Output of journalctl -xe with the UUID=XXXX device plugged out : 

Mar 25 20:18:39 Host sudo[23295]: user : TTY=pts/2 ; PWD=/home/user ; USER=root
; COMMAND=/usr/bin/mount /dev/sda1 /mnt
Mar 25 20:18:39 Host sudo[23295]: pam_unix(sudo:session): session opened for
user root by (uid=0)
Mar 25 20:18:39 Host kernel: EXT4-fs (sda1): mounted filesystem with ordered
data mode. Opts: (null)
Mar 25 20:18:39 Host systemd[1]: Unit mnt.mount is bound to inactive service.
Stopping, too.
Mar 25 20:18:39 Host systemd[1]: Unmounting /mnt...
-- Subject: Unit mnt.mount has begun shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mnt.mount has begun shutting down.
Mar 25 20:18:39 Host sudo[23295]: pam_unix(sudo:session): session closed for
user root
Mar 25 20:18:39 Host systemd[1]: Unmounted /mnt.
-- Subject: Unit mnt.mount has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mnt.mount has finished shutting down.

Here it is when plugged in : 
Mar 25 20:41:28 Host sudo[562]: user : TTY=pts/1 ; PWD=/home/user ; USER=root ;
COMMAND=/usr/bin/mount /dev/sda1 /mnt
Mar 25 20:41:28 Host sudo[562]: pam_unix(sudo:session): session opened for user
root by (uid=0)
Mar 25 20:41:28 Host sudo[562]: pam_unix(sudo:session): session closed for user
root
Mar 25 20:41:28 Host kernel: EXT4-fs (sda1): mounted filesystem with ordered
data mode. Opts: (null)
[Device successfully mounted on /mnt]

This is even more an issue as mount(8) stipulates that "The  mount program does
not read the /etc/fstab file if both device (or LABEL, UUID, PARTUUID or
PARTLABEL) and dir are specified." (i.e. people don't expect fstab to mess with
a command like "mount /dev/sda1 /media").

Thank you for reading.

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