:: Re: [DNG] I have a question about l…
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Autor: Didier Kryn
Data:  
Dla: dng
Temat: Re: [DNG] I have a question about libsystemd0 in devuan ascii,
Le 29/06/2017 à 18:06, karl@??? a écrit :
> Didier:
> ...
>>      Everybody is using blkid to build thiese links, my script as well as
>> Udev and Vdev. You probably noticed that blkid has a special option for
>> Udev because Udev people are too lazzy to parse the response. In Vdev,
>> Jude made the parsing job to be compatible with Busybox's blkid which
>> hasn't this special format.
> Ok.

>
>>      So blkid authors on one hand provide a special format for Udev to
>> create the symlinks, and on the other hand claim that they aren't reliable!
> Heh, funny world, isn't it.

>
> ///
>
> Since you can mount a fs by its uuid or label:
>
> # blkid /dev/md7
> /dev/md7: UUID="b3a4343f-ea9f-442e-911b-994e70ef2c5c" TYPE="xfs"
> # mount --uuid b3a4343f-ea9f-442e-911b-994e70ef2c5c /Net
> # df /Net
> Filesystem      1K-blocks       Used Available Use% Mounted on
> /dev/md7       1952749916 1615159700 337590216  83% /Net
> # umount /Net/
> # df /Net
> Filesystem     1K-blocks  Used Available Use% Mounted on
> /dev/root         849332 60964    728008   8% /
> # ls -l /dev/disk
> ls: cannot access '/dev/disk': No such file or directory
> #

>
> Isn't /dev/disk/by* redundant, couldn't we just deprecate them,
> don't that ?
>

     These links are a conveniency. You don't need to invoke blkid or 
lsblk to know immediately what's there.