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SunOS 5.5 Device and Network Interfaces Intro(7)

NAME Intro, intro − introduction to special ﬁles

DESCRIPTION This section describes various device and network interfaces available on the system.

The types of interfaces described include character and block devices, STREAMS

modules, network protocols, ﬁle systems, and ioctl requests for driver subsystems and

classes.

This section contains the following major collections:

(7D) The system provides drivers for a variety of hardware devices, such as disk,

magnetic tapes, serial communication lines, mice, and frame buffers, as well as

virtual devices such as pseudo-terminals and windows.

This section describes special ﬁles that refer to speciﬁc hardware peripherals

and device drivers. STREAMS device drivers are also described. Characteristics

of both the hardware device and the corresponding device driver are discussed

where applicable.

An application accesses a device through that device’s special ﬁle. This section

speciﬁes the device special ﬁle to be used to access the device as well as applica-

tion programming interface (API) information relevant to the use of the device

driver.

All device special ﬁles are located under the /devices directory. The /devices

directory hierarchy attempts to mirror the hierarchy of system busses, controll-

ers, and devices conﬁgured on the system. Logical device names for special ﬁles

in /devices are located under the /dev directory. Althoughnot every special ﬁle

under /devices will have a corresponding logical entry under /dev, whenever

possible, an application should reference a device using the logical name for the

device. Logical device names are listed in the FILES section of the page for the

device in question.

This section also describes driver conﬁguration where applicable. Many device

drivers have a driver conﬁguration ﬁle of the form driver_name.conf associated

with them (see driver.conf(4)). The conﬁguration information stored in the

driver conﬁguration ﬁle is used to conﬁgure the driver and the device. Driver

conﬁguration ﬁles are located in /kernel/drv and /usr/kernel/drv. Driver

conﬁguration ﬁles for platform dependent drivers are located in

/platform/‘uname -i‘/kernel/drv where ‘uname -i‘ is the output of the uname(1)

command with the -i option.

Some driver conﬁguration ﬁles may contain user conﬁgurable properties.

Changes in a driver’s conﬁguration ﬁle will not take effect until the system is

rebooted or the driver has been removed and re-added (see rem_drv(1M) and

add_drv(1M)).

(7FS) This section describes the programmatic interface for several ﬁle systems sup-

ported by SunOS.

(7I) This section describes ioctl requests which apply to a class of drivers or subsys-

tems. For example, ioctl requests which apply to most tape devices are

modiﬁed 29 Sep 1994 7-5

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