bio man page on MirBSD

bio man page on MirBSD

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BIO(4)			   BSD Programmer's Manual			BIO(4)

NAME
     bio - ioctl tunnel pseudo-device

SYNOPSIS
     pseudo-device bio [count]
     [count]

DESCRIPTION
     The bio driver provides userland applications ioctl access to devices
     otherwise not found as /dev nodes. The /dev/bio device node operates by
     delegating ioctl(2) calls to a requested device driver. Only drivers
     which have registered with the bio device can be accessed via this inter-
     face.

     If count is given in the specification, and is greater than 0, a maximum
     of one bio device is created.

     The following ioctl(2) calls apply to the bio device:

     BIOCLOCATE	 Locate a named device and give back a cookie to the applica-
		 tion for subsequent ioctl calls. The cookie is used to tunnel
		 further ioctls to the right device.

FILES
     /dev/bio  ioctl tunnel device

SEE ALSO
     gdt(4)

HISTORY
     The bio driver appeared in OpenBSD 3.2.

MirOS BSD #10-current		 June 8, 2002				     1

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