Installing Drivers with add_drv() (Writing Device Drivers)

Writing Device Drivers

Installing Drivers with `add_drv()`

Run add_drv(1M) to install the driver in the system. If the driver installs successfully, add_drv(1M) will run devfsadm(1M) to create the logical names in /dev.

# add_drv xx

This is a simple case in which the device identifies itself as xx and the device special files will have default ownership and permissions (0600 root sys). add_drv(1M) also allows additional names for the device (aliases) to be specified. See add_drv(1M) to determine how to add aliases and set file permissions explicitly.

Note –

add_drv(1M) should not be run when installing a STREAMS module. See the STREAMS Programming Guide for details.

If the driver creates minor nodes that do not represent disks, tapes, or ports (terminal devices), /etc/devlink.tab can be modified to cause devfsadm(1M) to create logical device names in /dev.

Alternatively, logical names can be created by a program run at driver installation time.