Where (exactly) does it mount?

[tz1]

I've tried looking for a manpage, the conf, and the rest, but I can't find something that explains exactly where a device will end up mounted.

Say I use udevil to mount /dev/sr0, then to mount /dev/sdb1 (removable USB). Are both going to be mounted to /media? Do I have to pre-create /media/something for each? Will it create them? If so, what will it create? UUIDs? Volume Labels? /media/dev-sr0 /media/dev-sdb1? What if I have two optical drives? Do I have to have them all in /etc/fstab (which ordinary users normally don't have access rights to?

From the "usage" which is just the help dump:
EXAMPLES:
udevil mount /dev/sdd1
udevil mount -o ro,noatime /dev/sdd1

OK, so it mounts /dev/sdd1. Where? The default config says somewhere under /media, but where under /media? I can specify where, but not if I want automounting. Nor does it say that it will or will not create /media/sdd1 if it doesn't exist if I do so.

The application is for a CLI only raspberry pi - I'm hoping to do a raspian deb package and use udevil, but I'm unlikely to use SpaceFM - which might handle it all in a way I can ignore everything when using it, but if it creates /run/media/whomeverIam/really-long-uuid123412o95u83958293409293478203unrelatedtothedevice and I have to decode it, it will be less useful.

What I really want to do is to have a /mnt directory, and for every /dev/sr* and /dev/sd[a-z][1-8], mount (maybe automatically) on /mnt/sd[a-z][1-8], 1 to 1. And something similar and simple for network links. I don't think that is what will happen by default, nor do I see a way in the conf file to achieve this. Extra but unnecessary would be to add symlinks to/from UUIDs and/or Volume Labels.

I can run it and find out what it appears to do, and see if I can get it to do what I want, but this should be something documented somewhere easy to find and understand the exact behavior. And on the manpage (is it really that stub or did I miss something)

[IgnorantGuru]

udevil's manpage is under development - subscribe to #33 for updates. Most of the documentation that exists is in the README, the usage (udevil --help) and in the well-commented conf file.

allowed_media_dirs determines where all items are mounted:

# allowed_media_dirs specifies the media directories in which user mount points
# may be located.  The first directory which exists and does not contain a
# wildcard will be used as the default media directory (normally /media or
# /run/media/$USER).
# The $USER variable, if included, will be replaced with the username of the
# user running udevil.  Wildcards may also be used in any directory EXCEPT the
# default.  Wildcards will not match a /
# allowed_media_dirs_FSTYPE, if present, is used to override allowed_media_dirs
# when mounting or unmounting a specific fstype (eg ext2, nfs).  For example,
# to cause /media/network to be used as the default media directory for
# nfs and ftpfs mounts, use these two lines:
# allowed_media_dirs_nfs   = /media/network, /media, /run/media/$USER
# allowed_media_dirs_ftpfs = /media/network, /media, /run/media/$USER
# NOTE: If you want only the user who mounted a device to have access to it
# and be allowed to unmount it, specify /run/media/$USER as the first
# allowed media directory.
# IMPORTANT:  If an allowed file is mounted to a media directory, the user may
# be permitted to unmount its associated loop device even though internal.
# INCLUDING /MNT HERE IS NOT RECOMMENDED.  ALL ALLOWED MEDIA DIRECTORIES
# SHOULD BE OWNED AND WRITABLE ONLY BY ROOT.
allowed_media_dirs = /media, /run/media/$USER

If you don't specify a mount point (and there is none in fstab), then udevil will create one. Its name will be based on the volume label, or otherwise on the bus type, device id, etc.

You can also specify a preferred mount point on the command line (just like mount's command line). In that case udevil will create the custom mount point for you (as root), subject to some limitations (eg it must be in allowed_media_dirs). eg

udevil mount /dev/sdd1 /media/custom

So you never have to pre-create a mount point. Either it will autoname one, or you can specify one, and either way it will be automatically created and removed.

Devices do not need to be in fstab. If they are, udevil will simply run mount as a normal user, just as if you had used mount directly. Or specify a mount point, which overrides fstab (like mount).

[mihaiolteanu]

If you don't specify a mount point (and there is none in fstab), then udevil will create one. Its name will be based on the volume label, or otherwise on the bus type, device id, etc.

How to mount /dev/sda1, on /media/sda1, for example?
That is, ignore the device label and use the device partition when (auto)mounting.

[jaimet]

How to mount /dev/sda1, on /media/sda1, for example? That is, ignore the device label and use the device partition when (auto)mounting.

Just specify your desired mount point as the next parameter:

$ udevil mount /dev/sda1 /media/sda1
Mounted /dev/sda1 at /media/sda1

It would be great if this happened by default, but that is the intention of this issue and this PR.

See here for more usage examples. HTH.