[sane-devel] My Fedora 27 Saned Systemd Tutorial

[ToddAndMargo]

Use at your own risk

Feel free to reproduce it.


On 02/03/2018 01:48 AM, ToddAndMargo wrote:
> Hi All,
> 
> Thank you for all the help you gave me to get this working!
> 
> Here is my tutorial:
> 
> -T
> 
> 
>   How to set up your scanner to work with
>   Sane and PDF Studio under Fedora 27 Linux's systemd
> 
> References:
> SaneDaemonTutorial <https://help.ubuntu.com/community/SaneDaemonTutorial>
> sand systemd manual page 
> <https://www.mankier.com/8/saned#Systemd_configuration_for_saned_with_systemd_support_compiled_in>
> RHEL: saned systemd support 
> <https://bugzilla.redhat.com/show_bug.cgi?id=1091566#c8>
> SaneOverNetwork 
> <https://wiki.debian.org/SaneOverNetwork#Client_Configuration>
> 
> 
> /*Background:*
> 
> *systemd*/ uses "sockets" to replace the defunct /xinetd/.
> *systemd* will listen on port 6566 tcp and use /saned.socket/ to start 
> an instance of /saned at .service/ for each request to port 6566 tcp
> 
> *Prerequisites:*
> 
> /saned's/ daemons are required to be installed.
> *Fedora 27:*
> 
> |su root -c "dnf install sane-backends sane-backends-daemon" |
> 
> *Redhat Enterprise Linux and Clones (CentOS, Scientific Linux):*
> Note: sane-backends is not support under Enterprise Linux due to 
> Enterprise Linux's deliberate out of date nature as needed patches can 
> not be installed
> 
> *Systemd Scripts:*
> For the systemd configuration we need to add 2 configuration files 
> called /*saned.socket*/ and /*saned at saned.service*/ in 
> /*/etc/systemd/system*/ with:
> 
> ownership of /*root.root*/, and
> permissions of /*755*/
> 
> /*saned.socket*/
> 
> |[Unit] Description=saned incoming socket [Socket] ListenStream=6566 
> Accept=yes MaxConnections=1 connect_timeout=60 [Install] 
> WantedBy=sockets.target |
> 
> 
> /*saned at saned.service*/
> 
> |[Unit] Description=Scanner Service Requires=saned.socket [Service] 
> ExecStart=/usr/sbin/saned User=saned Group=saned StandardInput=null 
> StandardOutput=syslog StandardError=syslog # 
> Environment=SANE_CONFIG_DIR=/etc/sane.d SANE_DEBUG_DLL=255 |
> 
> 
> To create the daemon's user and group accounts:
> 
> |/su root -c "useradd saned" su root -c "useradd -g saned saned"/ |
> 
> 
> To set ownership and permissions of these two file:
> 
> |/su root -c "chown root.root /etc/systemd/system/saned.service 
> /etc/systemd/system/saned.socket" su root -c "chmod 644 
> /etc/systemd/system/saned.service /etc/systemd/system/saned.socket"/ |
> 
> 
> Add you local host name to /etc/sane.d/saned.conf.
> For Example (substitute your actual network for the one shown):
> 
> |# The hostname matching is not case-sensitive. 192.168.255.0/24 localhost |
> 
> 
> Add your local hostname resolved in /etc/hosts (get your host name from 
> the "hostname" command).
> For Example:
> 
> |127.0.0.1 foo.bar.local foo localhost localhost.localdomain localhost4 
> localhost4.localdomain4 |
> 
> 
> Add the following entry to /etc/services.
> 
> |sane-port 6566/tcp # SANE network scanner daemon |
> 
> 
> To active these services at boot:
> 
> |/su root -c "systemctl enable saned.socket" su root -c "useradd -g saned 
> saned"/ |
> 
> 
> To manually start the sand service:
> 
> |/su root -c "systemctl start saned.socket"/|
> 
> 
> SELinux on Fedora 27:
> 
> |/SELinux Policy must 3.13.1-283.21 or later To check your version 
> SELinux Policy: rpm -qa selinux-policy To update SELinux Policy: su root 
> -c "dnf upgrade selinux-policy" su root -c "ausearch -c 'systemd' --raw 
> | audit2allow -M my-systemd" su root -c "semodule -X 300 -i 
> my-systemd.pp" /|
> 
> To test the sand service ("$" means to test as a standard user):
> 
> |/*$ nmap -p 6566 192.168.255.10* /Starting Nmap 7.60 ( https://nmap.org 
> ) at 2018-02-03 01:26 PST Nmap scan report for rn1.rent-a-nerd.local 
> (192.168.255.10) Host is up (0.00025s latency). PORT STATE SERVICE 
> 6566/tcp open sane-port Nmap done: 1 IP address (1 host up) scanned in 
> 0.06 seconds/ *$ xsane net:192.168.255.10*/|
> 
> 
> 
> 
> 
> 
> 


-- 
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They malfunction when you open windows
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