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#
# For a description of the syntax of this configuration file,
# see scripts/kbuild/config-language.txt.
#
menu "Login/Password Management Utilities"
config FEATURE_SHADOWPASSWDS
bool "Support for shadow passwords"
default n
help
Build support for shadow password in /etc/shadow. This file is only
readable by root and thus the encrypted passwords are no longer
publicly readable.
config USE_BB_PWD_GRP
bool "Use internal password and group functions rather than system functions"
default n
help
If you leave this disabled, busybox will use the system's password
and group functions. And if you are using the GNU C library
(glibc), you will then need to install the /etc/nsswitch.conf
configuration file and the required /lib/libnss_* libraries in
order for the password and group functions to work. This generally
makes your embedded system quite a bit larger.
Enabling this option will cause busybox to directly access the
system's /etc/password, /etc/group files (and your system will be
smaller, and I will get fewer emails asking about how glibc NSS
works). When this option is enabled, you will not be able to use
PAM to access remote LDAP password servers and whatnot. And if you
want hostname resolution to work with glibc, you still need the
/lib/libnss_* libraries.
If you need to use glibc's nsswitch.conf mechanism
(e.g. if user/group database is NOT stored in /etc/passwd etc),
you must NOT use this option.
If you enable this option, it will add about 1.5k.
config USE_BB_SHADOW
bool "Use internal shadow password functions"
default y
depends on USE_BB_PWD_GRP && FEATURE_SHADOWPASSWDS
help
If you leave this disabled, busybox will use the system's shadow
password handling functions. And if you are using the GNU C library
(glibc), you will then need to install the /etc/nsswitch.conf
configuration file and the required /lib/libnss_* libraries in
order for the shadow password functions to work. This generally
makes your embedded system quite a bit larger.
Enabling this option will cause busybox to directly access the
system's /etc/shadow file when handling shadow passwords. This
makes your system smaller (and I will get fewer emails asking about
how glibc NSS works). When this option is enabled, you will not be
able to use PAM to access shadow passwords from remote LDAP
password servers and whatnot.
config USE_BB_CRYPT
bool "Use internal crypt functions"
default y
help
Busybox has internal DES and MD5 crypt functions.
They produce results which are identical to corresponding
standard C library functions.
If you leave this disabled, busybox will use the system's
crypt functions. Most C libraries use large (~70k)
static buffers there, and also combine them with more general
DES encryption/decryption.
For busybox, having large static buffers is undesirable,
especially on NOMMU machines. Busybox also doesn't need
DES encryption/decryption and can do with smaller code.
If you enable this option, it will add about 4.8k of code
if you are building dynamically linked executable.
In static build, it makes code _smaller_ by about 1.2k,
and likely many kilobytes less of bss.
config USE_BB_CRYPT_SHA
bool "Enable SHA256/512 crypt functions"
default n
depends on USE_BB_CRYPT
help
Enable this if you have passwords starting with "$5$" or "$6$"
in your /etc/passwd or /etc/shadow files. These passwords
are hashed using SHA256 and SHA512 algorithms. Support for them
was added to glibc in 2008.
With this option off, login will fail password check for any
user which has password encrypted with these algorithms.
config ADDGROUP
bool "addgroup"
default n
help
Utility for creating a new group account.
config FEATURE_ADDGROUP_LONG_OPTIONS
bool "Enable long options"
default n
depends on ADDGROUP && GETOPT_LONG
help
Support long options for the addgroup applet.
config FEATURE_ADDUSER_TO_GROUP
bool "Support for adding users to groups"
default n
depends on ADDGROUP
help
If called with two non-option arguments,
addgroup will add an existing user to an
existing group.
config DELGROUP
bool "delgroup"
default n
help
Utility for deleting a group account.
config FEATURE_DEL_USER_FROM_GROUP
bool "Support for removing users from groups"
default n
depends on DELGROUP
help
If called with two non-option arguments, deluser
or delgroup will remove an user from a specified group.
config FEATURE_CHECK_NAMES
bool "Enable sanity check on user/group names in adduser and addgroup"
default n
depends on ADDUSER || ADDGROUP
help
Enable sanity check on user and group names in adduser and addgroup.
To avoid problems, the user or group name should consist only of
letters, digits, underscores, periods, at signs and dashes,
and not start with a dash (as defined by IEEE Std 1003.1-2001).
For compatibility with Samba machine accounts "$" is also supported
at the end of the user or group name.
config ADDUSER
bool "adduser"
default n
help
Utility for creating a new user account.
config FEATURE_ADDUSER_LONG_OPTIONS
bool "Enable long options"
default n
depends on ADDUSER && GETOPT_LONG
help
Support long options for the adduser applet.
config DELUSER
bool "deluser"
default n
help
Utility for deleting a user account.
config GETTY
bool "getty"
default n
select FEATURE_SYSLOG
help
getty lets you log in on a tty, it is normally invoked by init.
config FEATURE_UTMP
bool "Support utmp file"
depends on GETTY || LOGIN || SU || WHO
default n
help
The file /var/run/utmp is used to track who is currently logged in.
config FEATURE_WTMP
bool "Support wtmp file"
depends on GETTY || LOGIN || SU || LAST
default n
select FEATURE_UTMP
help
The file /var/run/wtmp is used to track when user's have logged into
and logged out of the system.
config LOGIN
bool "login"
default n
select FEATURE_SUID
select FEATURE_SYSLOG
help
login is used when signing onto a system.
Note that Busybox binary must be setuid root for this applet to
work properly.
config PAM
bool "Support for PAM (Pluggable Authentication Modules)"
default n
depends on LOGIN
help
Use PAM in login(1) instead of direct access to password database.
config LOGIN_SCRIPTS
bool "Support for login scripts"
depends on LOGIN
default n
help
Enable this if you want login to execute $LOGIN_PRE_SUID_SCRIPT
just prior to switching from root to logged-in user.
config FEATURE_NOLOGIN
bool "Support for /etc/nologin"
default y
depends on LOGIN
help
The file /etc/nologin is used by (some versions of) login(1).
If it exists, non-root logins are prohibited.
config FEATURE_SECURETTY
bool "Support for /etc/securetty"
default y
depends on LOGIN
help
The file /etc/securetty is used by (some versions of) login(1).
The file contains the device names of tty lines (one per line,
without leading /dev/) on which root is allowed to login.
config PASSWD
bool "passwd"
default n
select FEATURE_SUID
select FEATURE_SYSLOG
help
passwd changes passwords for user and group accounts. A normal user
may only change the password for his/her own account, the super user
may change the password for any account. The administrator of a group
may change the password for the group.
Note that Busybox binary must be setuid root for this applet to
work properly.
config FEATURE_PASSWD_WEAK_CHECK
bool "Check new passwords for weakness"
default y
depends on PASSWD
help
With this option passwd will refuse new passwords which are "weak".
config CRYPTPW
bool "cryptpw"
default n
help
Encrypts the given password with the crypt(3) libc function
using the given salt. Debian has this utility under mkpasswd
name. Busybox provides mkpasswd as an alias for cryptpw.
config CHPASSWD
bool "chpasswd"
default n
help
Reads a file of user name and password pairs from standard input
and uses this information to update a group of existing users.
config SU
bool "su"
default n
select FEATURE_SUID
select FEATURE_SYSLOG
help
su is used to become another user during a login session.
Invoked without a username, su defaults to becoming the super user.
Note that Busybox binary must be setuid root for this applet to
work properly.
config FEATURE_SU_SYSLOG
bool "Enable su to write to syslog"
default y
depends on SU
config FEATURE_SU_CHECKS_SHELLS
bool "Enable su to check user's shell to be listed in /etc/shells"
depends on SU
default y
config SULOGIN
bool "sulogin"
default n
select FEATURE_SYSLOG
help
sulogin is invoked when the system goes into single user
mode (this is done through an entry in inittab).
config VLOCK
bool "vlock"
default n
select FEATURE_SUID
help
Build the "vlock" applet which allows you to lock (virtual) terminals.
Note that Busybox binary must be setuid root for this applet to
work properly.
endmenu
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