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      1 # $NetBSD: std,v 1.26 2026/07/18 01:06:15 thorpej Exp $
      2 #
      3 # standard MI 'options'
      4 #
      5 # this file is for options which can't be off-by-default for some reasons.
      6 # "it's commonly used" is NOT a good reason to enable options here.
      7 
      8 #
      9 # Always include "kern" attribute (module).  Other attributes don't need to
     10 # depend on "kern".
     11 #
     12 select	kern
     13 
     14 # Always include the "vfs" attribute (module).  Although all of the
     15 # ufs/xxx file systems depend on the vfs attribute, it is not required
     16 # that any file system actually be built-in to the kernel.  (At least
     17 # on some architectures, file system modules can be loaded at boot
     18 # time.)
     19 
     20 select vfs
     21 
     22 select	net		# XXX Clean up dependency
     23 
     24 # the following options are on-by-default to keep
     25 # kernel config file compatibility.
     26 options	VMSWAP		# Swap device/file support
     27 options	VMSWAP_ENCRYPTION # Swap encryption support
     28 options	BUFQ_FCFS	# First-come First-serve strategy
     29 options	BUFQ_DISKSORT	# Traditional min seek sort strategy
     30 options	RFC2292		# Previous version of Adv. Sockets API for IPv6 
     31 options	PTRACE		# Include ptrace(2) syscall
     32 options	PTRACE_HOOKS	# Include ptrace hooks
     33 options	COREDUMP	# allow processes to coredump.
     34 options	AIO		# POSIX asynchronous I/O
     35 options	MQUEUE		# POSIX message queues
     36 
     37 # Common compatibility functions. They happen to be needed even when
     38 # no compatibility option is explicitly enabled.
     39 #
     40 options        COMPAT_UTILS
     41 
     42 #
     43 # Security model.
     44 #
     45 options	secmodel_bsd44	# Traditional 4.4BSD security model
     46 options secmodel_extensions	# Long-documented, thus not really optional
     47 
     48 #
     49 # Scheduling algorithm
     50 #
     51 options	SCHED_4BSD
     52 
     53 pseudo-device	cpuctl
     54 
     55 #
     56 # /dev/random and /dev/urandom interfaces.
     57 #
     58 # This could be taken out of conf/std now that the entropy pool and
     59 # kernel random number generation API is part of kern proper --
     60 # provided that some care is taken in ensuring that we copy & paste
     61 # this line in essentially every kernel config, because many
     62 # applications, even embedded ones, will likely rely in some way or
     63 # other on reading from /dev/urandom.
     64 #
     65 pseudo-device	rnd
     66