buildroot/system/Config.in

menu "System configuration"

config BR2_TARGET_GENERIC_HOSTNAME
       string "System hostname"
       default "buildroot"
       help
         Select system hostname to be stored in /etc/hostname.

config BR2_TARGET_GENERIC_ISSUE
       string "System banner"
       default "Welcome to Buildroot"
       help
         Select system banner (/etc/issue) to be displayed at login.

choice
	bool "Passwords encoding"
	default BR2_TARGET_GENERIC_PASSWD_MD5
	help
	  Choose the password encoding scheme to use when Buildroot
	  needs to encode a password (eg. the root password, below).

	  Note: this is used at build-time, and *not* at runtime.

config BR2_TARGET_GENERIC_PASSWD_DES
	bool "des"
	help
	  Use standard 56-bit DES-based crypt(3) to encode passwords.

	  Old, wildly available, but also the weakest, very susceptible to
	  brute-force attacks.

config BR2_TARGET_GENERIC_PASSWD_MD5
	bool "md5"
	help
	  Use MD5 to encode passwords.

	  The default. Wildly available, and pretty good.
	  Although pretty strong, MD5 is now an old hash function, and
	  suffers from some weaknesses, which makes it susceptible to
	  brute-force attacks.

config BR2_TARGET_GENERIC_PASSWD_SHA256
	bool "sha-256"
	help
	  Use SHA256 to encode passwords.

	  Very strong, but not ubiquitous, although available in glibc
	  for some time now. Choose only if you are sure your C library
	  understands SHA256 passwords.

config BR2_TARGET_GENERIC_PASSWD_SHA512
	bool "sha-512"
	help
	  Use SHA512 to encode passwords.

	  Extremely strong, but not ubiquitous, although available in glibc
	  for some time now. Choose only if you are sure your C library
	  understands SHA512 passwords.

endchoice # Passwd encoding

config BR2_TARGET_GENERIC_PASSWD_METHOD
	string
	default "des"       if BR2_TARGET_GENERIC_PASSWD_DES
	default "md5"       if BR2_TARGET_GENERIC_PASSWD_MD5
	default "sha-256"   if BR2_TARGET_GENERIC_PASSWD_SHA256
	default "sha-512"   if BR2_TARGET_GENERIC_PASSWD_SHA512

choice
	prompt "/dev management"
	default BR2_ROOTFS_DEVICE_CREATION_STATIC

config BR2_ROOTFS_DEVICE_CREATION_STATIC
	bool "Static using device table"

config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_DEVTMPFS
	bool "Dynamic using devtmpfs only"

config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV
	bool "Dynamic using mdev"
	select BR2_PACKAGE_BUSYBOX

config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV
	bool "Dynamic using udev"
	depends on BR2_LARGEFILE # udev
	depends on BR2_USE_WCHAR # udev
	depends on !BR2_PREFER_STATIC_LIB # udev -> kmod
	select BR2_PACKAGE_UDEV

comment "udev requires a toolchain with LARGEFILE + WCHAR support"
	depends on !(BR2_LARGEFILE && BR2_USE_WCHAR)

comment "udev doesn't work with 'prefer static libraries'"
	depends on BR2_PREFER_STATIC_LIB

endchoice

choice
	prompt "Init system"
	default BR2_INIT_BUSYBOX

config BR2_INIT_BUSYBOX
	bool "Busybox"
	select BR2_PACKAGE_BUSYBOX

config BR2_INIT_SYSV
	bool "systemV"
	select BR2_PACKAGE_SYSVINIT

config BR2_INIT_SYSTEMD
	bool "systemd"
	depends on BR2_LARGEFILE
	depends on BR2_USE_WCHAR
	depends on BR2_INET_IPV6
	depends on BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV
	depends on BR2_TOOLCHAIN_HAS_THREADS
	depends on BR2_USE_MMU
	select BR2_PACKAGE_DBUS
	select BR2_PACKAGE_SYSTEMD

comment 'systemd requires largefile, wchar, IPv6, threads and udev support'
	depends on !(BR2_LARGEFILE && BR2_USE_WCHAR && \
		     BR2_INET_IPV6 && BR2_TOOLCHAIN_HAS_THREADS && \
		     BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV)

config BR2_INIT_NONE
	bool "None"

endchoice

config BR2_ROOTFS_DEVICE_TABLE
	string "Path to the permission tables"
	default "system/device_table.txt"
	help
	  Specify a space-separated list of permission table locations,
	  that will be passed to the makedevs utility to assign
	  correct owners and permissions on various files in the
	  target filesystem.

	  See package/makedevs/README for details on the usage and
	  syntax of these files.

config BR2_ROOTFS_STATIC_DEVICE_TABLE
	string "Path to the device tables"
	default "system/device_table_dev.txt"
	depends on BR2_ROOTFS_DEVICE_CREATION_STATIC
	help
	  Specify a space-separated list of device table locations,
	  that will be passed to the makedevs utility to create all
	  the special device files under /dev.

	  See package/makedevs/README for details on the usage and
	  syntax of these files.

choice
	prompt "Root FS skeleton"

config BR2_ROOTFS_SKELETON_DEFAULT
	bool "default target skeleton"
	help
	  Use default target skeleton

config BR2_ROOTFS_SKELETON_CUSTOM
	bool "custom target skeleton"
	help
	  Use custom target skeleton.

endchoice

if BR2_ROOTFS_SKELETON_CUSTOM
config BR2_ROOTFS_SKELETON_CUSTOM_PATH
	string "custom target skeleton path"
	default "system/skeleton"
	help
	  Path custom target skeleton.
endif

if BR2_ROOTFS_SKELETON_DEFAULT

config BR2_TARGET_GENERIC_ROOT_PASSWD
	string "Root password"
	default ""
	help
	  Set the initial root password (in clear). It will be md5-encrypted.

	  If set to empty (the default), then no root password will be set,
	  and root will need no password to log in.

	  WARNING! WARNING!
	  Although pretty strong, MD5 is now an old hash function, and
	  suffers from some weaknesses, which makes it susceptible to attacks.
	  It is showing its age, so this root password should not be trusted
	  to properly secure any product that can be shipped to the wide,
	  hostile world.

	  WARNING! WARNING!
	  The password appears in clear in the .config file, and may appear
	  in the build log! Avoid using a valuable password if either the
	  .config file or the build log may be distributed!

config BR2_TARGET_GENERIC_GETTY
       bool "Run a getty (login prompt) after boot"
       default y

if BR2_TARGET_GENERIC_GETTY
menu "getty options"
config BR2_TARGET_GENERIC_GETTY_PORT
	string "TTY port"
	default "ttyS0"
	help
	  Specify a port to run a getty on.

choice
	prompt "Baudrate"
	default BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200
	help
	  Select a baudrate to use.

config BR2_TARGET_GENERIC_GETTY_BAUDRATE_KEEP
       bool "keep kernel default"
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_9600
	bool "9600"
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_19200
	bool "19200"
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_38400
	bool "38400"
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_57600
	bool "57600"
config BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200
	bool "115200"
endchoice

config BR2_TARGET_GENERIC_GETTY_BAUDRATE
	string
	default "0"		if BR2_TARGET_GENERIC_GETTY_BAUDRATE_KEEP
	default "9600"		if BR2_TARGET_GENERIC_GETTY_BAUDRATE_9600
	default "19200"		if BR2_TARGET_GENERIC_GETTY_BAUDRATE_19200
	default "38400"		if BR2_TARGET_GENERIC_GETTY_BAUDRATE_38400
	default "57600"		if BR2_TARGET_GENERIC_GETTY_BAUDRATE_57600
	default "115200"	if BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200

config BR2_TARGET_GENERIC_GETTY_TERM
	string "TERM environment variable"
	default "vt100"
	help
	  Specify a TERM type.

config BR2_TARGET_GENERIC_GETTY_OPTIONS
	string "other options to pass to getty"
	default ""
	help
	  Any other flags you want to pass to getty,
	  Refer to getty --help for details.
endmenu
endif

config BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW
	bool "remount root filesystem read-write during boot"
	default y
	help
	  The root filesystem is typically mounted read-only at boot.
	  By default, buildroot remounts it in read-write mode early during the
	  boot process.
	  Say no here if you would rather like your root filesystem to remain
	  read-only.
	  If unsure, say Y.

endif # BR2_ROOTFS_SKELETON_DEFAULT

config BR2_ROOTFS_OVERLAY
	string "Root filesystem overlay directories"
	default ""
	help
	  Specify a list of directories that are copied over the target
	  root filesystem after the build has finished and before it is
	  packed into the selected filesystem images.

	  They are copied as-is into the rootfs, excluding files ending with
	  ~ and .git, .svn and .hg directories.

config BR2_ROOTFS_POST_BUILD_SCRIPT
	string "Custom scripts to run before creating filesystem images"
	default ""
	help
	  Specify a space-separated list of scripts to be run after the build
	  has finished and before Buildroot starts packing the files into
	  selected filesystem images.

	  This gives users the oportunity to do board-specific cleanups,
	  add-ons and the like, so the generated files can be used directly
	  without further processing.

	  These scripts are called with the target directory name as first
	  argument. Make sure the exit code of those scripts are 0, otherwise
	  make will stop after calling them.

config BR2_ROOTFS_POST_IMAGE_SCRIPT
	string "Custom scripts to run after creating filesystem images"
	default ""
	help
	  Specify a space-separated list of scripts to be run after
	  the build has finished and after Buildroot has packed the
	  files into selected filesystem images.

	  This can for example be used to call a tool building a
	  firmware image from different images generated by Buildroot,
	  or automatically extract the tarball root filesystem image
	  into some location exported by NFS, or any other custom
	  action.

	  These scripts are called with the images directory name as
	  first argument. The script is executed from the main Buildroot
	  source directory as the current directory.

config BR2_ROOTFS_POST_SCRIPT_ARGS
	string "Extra post-{build,image} arguments"
	depends on BR2_ROOTFS_POST_BUILD_SCRIPT != "" || BR2_ROOTFS_POST_IMAGE_SCRIPT != ""
	help
	  Pass these aditional arguments to each post-build or post-image
	  scripts.

	  Note that all the post-build and post-image scripts will be passed
	  the same set of arguments, you can not pass different arguments to
	  each script.

	  Note also, as stated in their respective help text, that the first
	  argument to each post-build or post-image script is the target
	  directory / images directory. The arguments in this option will be
	  passed *after* those.

endmenu