After doing some research I believe this is not a bug, but a
misunderstanding. With systemd in use in 16.04 saned is started only "on
demand", when a program calls for it.
The solution from the manpage I described above is actually realised
with the sane-utils package, the files are part of that package, only
difference is that the are placed in /lib/systemd/system instead of
/etc/systemd/system.
sane.socket listens on port 6566 for incoming saned-requests,
`sudo systemtctl status saned.socked` results in
● saned.socket - saned incoming socket
Loaded: loaded (/lib/systemd/system/saned.socket; enabled; vendor preset:
enabled)
Active: active (listening) since Mi 2016-05-25 16:46:07 CEST; 2h 17min ago
Listen: [::]:6566 (Stream)
Accepted: 0; Connected: 0
If saned is configured correctly and a program like xsane calls for it,
it is started accordingly.
`sudo systemtctl status saned@*.service` (mark the * !) then will
result in something like
● sa...@0-192.168.xxx.xx:6566-192.168.xxx.xx:38046.service - Scanner Service
(192.168.xxx.xx:38046)
Loaded: loaded (/lib/systemd/system/saned@.service; indirect; vendor preset:
enabled)
Active: active (running) since Mi 2016-05-25 18:47:01 CEST; 6min ago
Main PID: 2181 (saned)
CGroup:
/system.slice/system-saned.slice/sa...@0-192.168.xxx.xx:6566-192.168.xxx.xx:38046.service
└─2181 /usr/sbin/saned
Mai 25 18:47:01 computer-name systemd[1]: Started Scanner Service
(192.168.xxx.xx:38046).
Mai 25 18:47:01 computer-name saned[2181]: saned (AF-indep+IPv6+systemd) from
sane-backends 1.0.25git starting up
Mai 25 18:47:01 computername saned[2181]: check_host: access by remote host:
::ffff:192.168.xxx.xx
Mai 25 18:47:01 computername saned[2181]: init: access granted to
saned-user@::ffff:192.168.xxx.xx
sane is loaded by /lib/systemd/system/saned@.service, which starts
/usr/bin/saned as requested by xsane.
The service cannot be started manually by something like `sudo systemctl
start saned`, because it is only started by incoming requests.
`scanimage -L` will also start saned, but it will stop as soon as the
process is completed.
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https://bugs.launchpad.net/bugs/1577137
Title:
sane service masked and cannot be unmasked
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