配置 scanbd 以輪詢本地掃描程式

Created: November-22, 2018

識別本地掃描器

通過使用 lsusb，識別 productId （1909）：

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

使用該 productId ，grep 正確的配置檔案（它取決於你的掃描器型號，對我來說是 geneys.conf ）：

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

將檔案複製到 scanbd 配置資料夾中：

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

編輯 /usr/local/etc/scanbd/dll.conf 並用正確的掃描器後端替換 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

確認 scanbd 找到了本地掃描程式

現在我們準備測試：

scanbd -d7 -f

儘可能避免操作 env var SANE_CONFIG_DIR。它可能會破壞，預設值已在/usr/local/etc/scanbd/scanbd.conf 和 init 指令碼中配置。

輸出應類似於：

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

這裡最重要的是 isfound device。

如果找不到裝置沒有出現怎麼辦？

你應該再次檢查你的配置，特別是本文件的標識部分，並通過鍵入以下內容清除任何錯誤設定的最終 SANE_CONFIG_DIR env var：unset SANE_CONFIG_DIR

配置 xinetd 以在網路上偵聽 scanbm

建立/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 仔細檢查 scanbm 的路徑

然後，重新啟動 xinetd 並啟動 scanbd ：

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

scanimage -L 現在應該顯示掃描器。

此階段的大多數問題涉及許可權。通過做 sudo -u saned -s，確保 scanimage -L 在你登入時有效。

如果沒有，請檢查 USB 許可權：ls -al /dev/bus/usb/***

識別本地掃描器

確認 scanbd 找到了本地掃描程式

如果找不到裝置沒有出現怎麼辦？

配置 xinetd 以在網路上偵聽 scanbm