配置 scanbd 以轮询本地扫描程序

Created: November-22, 2018

识别本地扫描仪

通过使用 lsusb，识别 productId （1909）：

pi:# lsusb
pi:# Bus 001 Device 005: ID 04a9:1909 Canon, Inc. CanoScan LiDE 110

使用该 productId ，grep 正确的配置文件（它取决于你的扫描仪型号，对我来说是 geneys.conf ）：

pi:# grep 1909 /etc/sane.d/*conf
pi:# /etc/sane.d/genesys.conf:usb 0x04a9 0x1909

将文件复制到 scanbd 配置文件夹中：

cp /etc/sane.d/genesys.conf /usr/local/etc/scanbd/
cp /etc/sane.d/dll.conf /usr/local/etc/scanbd/

编辑 /usr/local/etc/scanbd/dll.conf 并用正确的扫描仪后端替换 net：

# /etc/sane.d/dll.conf - Configuration file for the SANE dynamic backend loader
#
# Backends can also be enabled by configuration snippets under
# /etc/sane.d/dll.d directory -- packages providing backends should drop
# a config file similar to dll.conf in this directory, named after the package.
#

# The next line enables the network backend; comment it out if you don't need
# to use a remote SANE scanner over the network - see sane-net(5) and saned(8)

genesys

确认 scanbd 找到了本地扫描程序

现在我们准备测试：

scanbd -d7 -f

尽可能避免操作 env var SANE_CONFIG_DIR。它可能会破坏，默认值已在/usr/local/etc/scanbd/scanbd.conf 和 init 脚本中配置。

输出应类似于：

scanbd: foreground
scanbd: reading config file /usr/local/etc/scanbd/scanbd.conf
scanbd: debug on: level: 7
scanbd: dropping privs to uid saned
scanbd: dropping privs to gid scanner
scanbd: group scanner has member: 
scanbd: saned
scanbd: pi
scanbd: drop privileges to gid: 110
scanbd: Running as effective gid 110
scanbd: drop privileges to uid: 110
scanbd: Running as effective uid 110
scanbd: dbus_init
scanbd: dbus match type='signal',interface='org.freedesktop.Hal.Manager'
scanbd: SANE_CONFIG_DIR=/usr/local/etc/scanbd/sane.d
scanbd: sane version 1.0
scanbd: Scanning for local-only devices
scanbd: found device: genesys:libusb:001:005 Canon LiDE 110 flatbed scanner

这里最重要的是 isfound device。

如果找不到设备没有出现怎么办？

你应该再次检查你的配置，特别是本文档的标识部分，并通过键入以下内容清除任何错误设置的最终 SANE_CONFIG_DIR env var：unset SANE_CONFIG_DIR

配置 xinetd 以在网络上侦听 scanbm

创建/etc/xinetd.d/sane-port，其中包含：

service sane-port
{
        port        = 6566
        socket_type = stream
        wait        = no
        user        = saned
        group       = scanner
        server      = /usr/local/sbin/scanbm
        server_args = scanbm -c /usr/local/etc/scanbd/scanbd.conf
        disable     = no
}

/！\ 用 which scanbm 仔细检查 scanbm 的路径

然后，重新启动 xinetd 并启动 scanbd ：

service xinetd restart
/etc/init.d/scanbd start

scanimage -L 现在应该显示扫描仪。

此阶段的大多数问题涉及权限。通过做 sudo -u saned -s，确保 scanimage -L 在你登录时有效。

如果没有，请检查 USB 权限：ls -al /dev/bus/usb/***

识别本地扫描仪

确认 scanbd 找到了本地扫描程序

如果找不到设备没有出现怎么办？

配置 xinetd 以在网络上侦听 scanbm