[Coding] 如何讓CGI有權限可以access /dev/input/ node

預設在Lighttpd當中的CGI，其groupname可能並沒有權限可以access /dev/input/當中的file node，而透過上篇說到的supplementary group，就可以讓CGI有額外的權限。

例子很簡單，只需要修改lighttpd.conf，加上下面這段即可

# It is used to support supplementary groups to let
# lighttpd have enough permissions to access resources.
# if necessary.
# NOTE:  s-groupnames is a array config type.
server.s-groupnames = ( "input" )