304 lines
8.8 KiB
Plaintext
304 lines
8.8 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see scripts/kbuild/config-language.txt.
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#
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menu "Login/Password Management Utilities"
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config FEATURE_SHADOWPASSWDS
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bool "Support for shadow passwords"
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default y
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help
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Build support for shadow password in /etc/shadow. This file is only
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readable by root and thus the encrypted passwords are no longer
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publicly readable.
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config USE_BB_PWD_GRP
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bool "Use internal password and group functions rather than system functions"
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default y
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help
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If you leave this disabled, busybox will use the system's password
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and group functions. And if you are using the GNU C library
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(glibc), you will then need to install the /etc/nsswitch.conf
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configuration file and the required /lib/libnss_* libraries in
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order for the password and group functions to work. This generally
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makes your embedded system quite a bit larger.
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Enabling this option will cause busybox to directly access the
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system's /etc/password, /etc/group files (and your system will be
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smaller, and I will get fewer emails asking about how glibc NSS
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works). When this option is enabled, you will not be able to use
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PAM to access remote LDAP password servers and whatnot. And if you
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want hostname resolution to work with glibc, you still need the
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/lib/libnss_* libraries.
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If you need to use glibc's nsswitch.conf mechanism
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(e.g. if user/group database is NOT stored in /etc/passwd etc),
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you must NOT use this option.
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If you enable this option, it will add about 1.5k.
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config USE_BB_SHADOW
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bool "Use internal shadow password functions"
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default y
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depends on USE_BB_PWD_GRP && FEATURE_SHADOWPASSWDS
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help
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If you leave this disabled, busybox will use the system's shadow
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password handling functions. And if you are using the GNU C library
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(glibc), you will then need to install the /etc/nsswitch.conf
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configuration file and the required /lib/libnss_* libraries in
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order for the shadow password functions to work. This generally
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makes your embedded system quite a bit larger.
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Enabling this option will cause busybox to directly access the
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system's /etc/shadow file when handling shadow passwords. This
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makes your system smaller (and I will get fewer emails asking about
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how glibc NSS works). When this option is enabled, you will not be
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able to use PAM to access shadow passwords from remote LDAP
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password servers and whatnot.
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config USE_BB_CRYPT
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bool "Use internal crypt functions"
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default y
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help
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Busybox has internal DES and MD5 crypt functions.
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They produce results which are identical to corresponding
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standard C library functions.
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If you leave this disabled, busybox will use the system's
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crypt functions. Most C libraries use large (~70k)
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static buffers there, and also combine them with more general
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DES encryption/decryption.
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For busybox, having large static buffers is undesirable,
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especially on NOMMU machines. Busybox also doesn't need
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DES encryption/decryption and can do with smaller code.
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If you enable this option, it will add about 4.8k of code
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if you are building dynamically linked executable.
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In static build, it makes code _smaller_ by about 1.2k,
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and likely many kilobytes less of bss.
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config USE_BB_CRYPT_SHA
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bool "Enable SHA256/512 crypt functions"
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default y
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depends on USE_BB_CRYPT
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help
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Enable this if you have passwords starting with "$5$" or "$6$"
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in your /etc/passwd or /etc/shadow files. These passwords
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are hashed using SHA256 and SHA512 algorithms. Support for them
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was added to glibc in 2008.
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With this option off, login will fail password check for any
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user which has password encrypted with these algorithms.
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config ADDGROUP
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bool "addgroup"
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default y
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help
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Utility for creating a new group account.
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config FEATURE_ADDGROUP_LONG_OPTIONS
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bool "Enable long options"
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default y
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depends on ADDGROUP && LONG_OPTS
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help
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Support long options for the addgroup applet.
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config FEATURE_ADDUSER_TO_GROUP
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bool "Support for adding users to groups"
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default y
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depends on ADDGROUP
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help
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If called with two non-option arguments,
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addgroup will add an existing user to an
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existing group.
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config DELGROUP
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bool "delgroup"
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default y
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help
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Utility for deleting a group account.
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config FEATURE_DEL_USER_FROM_GROUP
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bool "Support for removing users from groups"
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default y
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depends on DELGROUP
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help
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If called with two non-option arguments, deluser
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or delgroup will remove an user from a specified group.
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config FEATURE_CHECK_NAMES
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bool "Enable sanity check on user/group names in adduser and addgroup"
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default n
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depends on ADDUSER || ADDGROUP
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help
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Enable sanity check on user and group names in adduser and addgroup.
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To avoid problems, the user or group name should consist only of
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letters, digits, underscores, periods, at signs and dashes,
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and not start with a dash (as defined by IEEE Std 1003.1-2001).
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For compatibility with Samba machine accounts "$" is also supported
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at the end of the user or group name.
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config ADDUSER
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bool "adduser"
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default y
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help
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Utility for creating a new user account.
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config FEATURE_ADDUSER_LONG_OPTIONS
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bool "Enable long options"
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default y
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depends on ADDUSER && LONG_OPTS
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help
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Support long options for the adduser applet.
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config FIRST_SYSTEM_ID
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int "First valid system uid or gid for adduser and addgroup"
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depends on ADDUSER || ADDGROUP
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range 0 64900
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default 100
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help
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First valid system uid or gid for adduser and addgroup
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config LAST_SYSTEM_ID
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int "Last valid system uid or gid for adduser and addgroup"
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depends on ADDUSER || ADDGROUP
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range 0 64900
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default 999
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help
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Last valid system uid or gid for adduser and addgroup
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config DELUSER
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bool "deluser"
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default y
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help
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Utility for deleting a user account.
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config GETTY
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bool "getty"
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default y
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select FEATURE_SYSLOG
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help
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getty lets you log in on a tty, it is normally invoked by init.
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config LOGIN
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bool "login"
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default y
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select FEATURE_SUID
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select FEATURE_SYSLOG
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help
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login is used when signing onto a system.
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Note that Busybox binary must be setuid root for this applet to
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work properly.
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config PAM
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bool "Support for PAM (Pluggable Authentication Modules)"
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default n
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depends on LOGIN
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help
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Use PAM in login(1) instead of direct access to password database.
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config LOGIN_SCRIPTS
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bool "Support for login scripts"
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depends on LOGIN
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default y
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help
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Enable this if you want login to execute $LOGIN_PRE_SUID_SCRIPT
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just prior to switching from root to logged-in user.
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config FEATURE_NOLOGIN
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bool "Support for /etc/nologin"
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default y
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depends on LOGIN
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help
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The file /etc/nologin is used by (some versions of) login(1).
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If it exists, non-root logins are prohibited.
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config FEATURE_SECURETTY
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bool "Support for /etc/securetty"
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default y
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depends on LOGIN
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help
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The file /etc/securetty is used by (some versions of) login(1).
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The file contains the device names of tty lines (one per line,
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without leading /dev/) on which root is allowed to login.
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config PASSWD
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bool "passwd"
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default y
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select FEATURE_SUID
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select FEATURE_SYSLOG
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help
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passwd changes passwords for user and group accounts. A normal user
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may only change the password for his/her own account, the super user
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may change the password for any account. The administrator of a group
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may change the password for the group.
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Note that Busybox binary must be setuid root for this applet to
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work properly.
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config FEATURE_PASSWD_WEAK_CHECK
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bool "Check new passwords for weakness"
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default y
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depends on PASSWD
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help
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With this option passwd will refuse new passwords which are "weak".
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config CRYPTPW
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bool "cryptpw"
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default y
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help
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Encrypts the given password with the crypt(3) libc function
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using the given salt. Debian has this utility under mkpasswd
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name. Busybox provides mkpasswd as an alias for cryptpw.
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config CHPASSWD
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bool "chpasswd"
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default y
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help
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Reads a file of user name and password pairs from standard input
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and uses this information to update a group of existing users.
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config SU
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bool "su"
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default y
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select FEATURE_SUID
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select FEATURE_SYSLOG
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help
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su is used to become another user during a login session.
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Invoked without a username, su defaults to becoming the super user.
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Note that Busybox binary must be setuid root for this applet to
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work properly.
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config FEATURE_SU_SYSLOG
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bool "Enable su to write to syslog"
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default y
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depends on SU
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config FEATURE_SU_CHECKS_SHELLS
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bool "Enable su to check user's shell to be listed in /etc/shells"
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depends on SU
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default y
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config SULOGIN
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bool "sulogin"
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default y
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select FEATURE_SYSLOG
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help
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sulogin is invoked when the system goes into single user
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mode (this is done through an entry in inittab).
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config VLOCK
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bool "vlock"
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default y
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select FEATURE_SUID
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help
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Build the "vlock" applet which allows you to lock (virtual) terminals.
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Note that Busybox binary must be setuid root for this applet to
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work properly.
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endmenu
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