DEVCLASS_GET_MAXUNIT(9)                      FreeBSD Kernel Developer's Manual

NAME
     devclass_get_maxunit - find the maximum unit number in the class

SYNOPSIS
     #include <sys/param.h>
     #include <sys/bus.h>

     int
     devclass_get_maxunit(devclass_t dc);

DESCRIPTION
     Returns the next unit number to be allocated to device instances in the
     devclass.  This is one greater than the highest currently allocated unit.

RETURN VALUES
     The devclass_get_maxunit() function returns -1 if dc is NULL, otherwise
     it returns the next unit number in dc's devclass.

ERRORS
     None.

SEE ALSO
     devclass(9), device(9)

AUTHORS
     This manual page was written by Doug Rabson.

BUGS
     The name is confusing since it is one greater than the maximum unit.

FreeBSD 13.1-RELEASE-p6       September 10, 2010       FreeBSD 13.1-RELEASE-p6