NAME

octboot — kernel boot interface

SYNOPSIS

pseudo-device octboot

DESCRIPTION

The octboot driver provides an ioctl(2) interface for booting into another kernel from the currently running kernel.

IOCTL INTERFACE

octboot provides the following ioctl(2) commands, available through <machine/octboot.h>:

OBIOC_GETROOTDEV char rootdev[PATH_MAX]

Get the name of the current root device.

OBIOC_KEXEC struct octboot_kexec_args *args

Boot into the given kernel image.

struct octboot_kexec_args {
	char		*kimg;
	size_t		 klen;
	char		*argv[OCTBOOT_MAX_ARGS];
};

FILES

/dev/octboot

boot interface device.

SEE ALSO

ioctl(2), intro(4)

HISTORY

The octboot driver first appeared in OpenBSD 6.6.