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
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@.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Enterprise Linux's deliberate out of date nature as needed patches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@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@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
