Writing custom installation scripts

A driver installation shell script should do the following:

• Check to see if the Link Kit is present. This is done by running the fixperm(ADM) command. If the Link Kit is not installed, prompt the customer to determine if it should be installed and if the reply is positive, install it. If the Link Kit is loaded after fixperm reports that the Link Kit is partially installed, there is a possibility that important files will be overwritten. To discover which files are missing, run fixperm, and then use custom to install individual files.

• Add the new driver entry points to the kernel using idinstall(ADM).

• Change directory to /etc/conf/cf.d, and then run link_unix to link the kernel. link_unix runs idbuild which, in turn, runs a number of other commands such as idmknod that actually build the kernel.