package/busybox/config/loginutils/Config.in

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see scripts/kbuild/config-language.txt.
   4 #
   5
   6 menu "Login/Password Management Utilities"
   7
   8 config BUSYBOX_CONFIG_FEATURE_SHADOWPASSWDS
   9         bool "Support for shadow passwords"
  10         default n
  11         help
  12           Build support for shadow password in /etc/shadow. This file is only
  13           readable by root and thus the encrypted passwords are no longer
  14           publicly readable.
  15
  16 config BUSYBOX_CONFIG_USE_BB_PWD_GRP
  17         bool "Use internal password and group functions rather than system functions"
  18         default n
  19         help
  20           If you leave this disabled, busybox will use the system's password
  21           and group functions. And if you are using the GNU C library
  22           (glibc), you will then need to install the /etc/nsswitch.conf
  23           configuration file and the required /lib/libnss_* libraries in
  24           order for the password and group functions to work. This generally
  25           makes your embedded system quite a bit larger.
  26
  27           Enabling this option will cause busybox to directly access the
  28           system's /etc/password, /etc/group files (and your system will be
  29           smaller, and I will get fewer emails asking about how glibc NSS
  30           works). When this option is enabled, you will not be able to use
  31           PAM to access remote LDAP password servers and whatnot. And if you
  32           want hostname resolution to work with glibc, you still need the
  33           /lib/libnss_* libraries.
  34
  35           If you need to use glibc's nsswitch.conf mechanism
  36           (e.g. if user/group database is NOT stored in /etc/passwd etc),
  37           you must NOT use this option.
  38
  39           If you enable this option, it will add about 1.5k.
  40
  41 config BUSYBOX_CONFIG_USE_BB_SHADOW
  42         bool "Use internal shadow password functions"
  43         default n
  44         depends on BUSYBOX_CONFIG_USE_BB_PWD_GRP && BUSYBOX_CONFIG_FEATURE_SHADOWPASSWDS
  45         help
  46           If you leave this disabled, busybox will use the system's shadow
  47           password handling functions. And if you are using the GNU C library
  48           (glibc), you will then need to install the /etc/nsswitch.conf
  49           configuration file and the required /lib/libnss_* libraries in
  50           order for the shadow password functions to work. This generally
  51           makes your embedded system quite a bit larger.
  52
  53           Enabling this option will cause busybox to directly access the
  54           system's /etc/shadow file when handling shadow passwords. This
  55           makes your system smaller (and I will get fewer emails asking about
  56           how glibc NSS works). When this option is enabled, you will not be
  57           able to use PAM to access shadow passwords from remote LDAP
  58           password servers and whatnot.
  59
  60 config BUSYBOX_CONFIG_USE_BB_CRYPT
  61         bool "Use internal crypt functions"
  62         default n
  63         help
  64           Busybox has internal DES and MD5 crypt functions.
  65           They produce results which are identical to corresponding
  66           standard C library functions.
  67
  68           If you leave this disabled, busybox will use the system's
  69           crypt functions. Most C libraries use large (~70k)
  70           static buffers there, and also combine them with more general
  71           DES encryption/decryption.
  72
  73           For busybox, having large static buffers is undesirable,
  74           especially on NOMMU machines. Busybox also doesn't need
  75           DES encryption/decryption and can do with smaller code.
  76
  77           If you enable this option, it will add about 4.8k of code
  78           if you are building dynamically linked executable.
  79           In static build, it makes code _smaller_ by about 1.2k,
  80           and likely many kilobytes less of bss.
  81
  82 config BUSYBOX_CONFIG_USE_BB_CRYPT_SHA
  83         bool "Enable SHA256/512 crypt functions"
  84         default n
  85         depends on BUSYBOX_CONFIG_USE_BB_CRYPT
  86         help
  87           Enable this if you have passwords starting with "$5$" or "$6$"
  88           in your /etc/passwd or /etc/shadow files. These passwords
  89           are hashed using SHA256 and SHA512 algorithms. Support for them
  90           was added to glibc in 2008.
  91           With this option off, login will fail password check for any
  92           user which has password encrypted with these algorithms.
  93
  94 config BUSYBOX_CONFIG_ADDGROUP
  95         bool "addgroup"
  96         default n
  97         help
  98           Utility for creating a new group account.
  99
 100 config BUSYBOX_CONFIG_FEATURE_ADDUSER_TO_GROUP
 101         bool "Support for adding users to groups"
 102         default n
 103         depends on BUSYBOX_CONFIG_ADDGROUP
 104         help
 105           If  called  with two non-option arguments,
 106           addgroup will add an existing user to an
 107           existing group.
 108
 109 config BUSYBOX_CONFIG_DELGROUP
 110         bool "delgroup"
 111         default n
 112         help
 113           Utility for deleting a group account.
 114
 115 config BUSYBOX_CONFIG_FEATURE_DEL_USER_FROM_GROUP
 116         bool "Support for removing users from groups"
 117         default n
 118         depends on BUSYBOX_CONFIG_DELGROUP
 119         help
 120           If called with two non-option arguments, deluser
 121           or delgroup will remove an user from a specified group.
 122
 123 config BUSYBOX_CONFIG_FEATURE_CHECK_NAMES
 124         bool "Enable sanity check on user/group names in adduser and addgroup"
 125         default n
 126         depends on BUSYBOX_CONFIG_ADDUSER || BUSYBOX_CONFIG_ADDGROUP
 127         help
 128           Enable sanity check on user and group names in adduser and addgroup.
 129           To avoid problems, the user or group name should consist only of
 130           letters, digits, underscores, periods, at signs and dashes,
 131           and not start with a dash (as defined by IEEE Std 1003.1-2001).
 132           For compatibility with Samba machine accounts "$" is also supported
 133           at the end of the user or group name.
 134
 135 config BUSYBOX_CONFIG_ADDUSER
 136         bool "adduser"
 137         default n
 138         help
 139           Utility for creating a new user account.
 140
 141 config BUSYBOX_CONFIG_FEATURE_ADDUSER_LONG_OPTIONS
 142         bool "Enable long options"
 143         default n
 144         depends on BUSYBOX_CONFIG_ADDUSER && BUSYBOX_CONFIG_GETOPT_LONG
 145         help
 146           Support long options for the adduser applet.
 147
 148 config BUSYBOX_CONFIG_DELUSER
 149         bool "deluser"
 150         default n
 151         help
 152           Utility for deleting a user account.
 153
 154 config BUSYBOX_CONFIG_GETTY
 155         bool "getty"
 156         default n
 157         select BUSYBOX_CONFIG_FEATURE_SYSLOG
 158         help
 159           getty lets you log in on a tty, it is normally invoked by init.
 160
 161 config BUSYBOX_CONFIG_FEATURE_UTMP
 162         bool "Support utmp file"
 163         depends on BUSYBOX_CONFIG_GETTY || BUSYBOX_CONFIG_LOGIN || BUSYBOX_CONFIG_SU || BUSYBOX_CONFIG_WHO
 164         default n
 165         help
 166           The file /var/run/utmp is used to track who is currently logged in.
 167
 168 config BUSYBOX_CONFIG_FEATURE_WTMP
 169         bool "Support wtmp file"
 170         depends on BUSYBOX_CONFIG_GETTY || BUSYBOX_CONFIG_LOGIN || BUSYBOX_CONFIG_SU || BUSYBOX_CONFIG_LAST
 171         default n
 172         select BUSYBOX_CONFIG_FEATURE_UTMP
 173         help
 174           The file /var/run/wtmp is used to track when user's have logged into
 175           and logged out of the system.
 176
 177 config BUSYBOX_CONFIG_LOGIN
 178         bool "login"
 179         default n
 180         select BUSYBOX_CONFIG_FEATURE_SUID
 181         select BUSYBOX_CONFIG_FEATURE_SYSLOG
 182         help
 183           login is used when signing onto a system.
 184
 185           Note that Busybox binary must be setuid root for this applet to
 186           work properly.
 187
 188 config BUSYBOX_CONFIG_PAM
 189         bool "Support for PAM (Pluggable Authentication Modules)"
 190         default n
 191         depends on BUSYBOX_CONFIG_LOGIN
 192         help
 193           Use PAM in login(1) instead of direct access to password database.
 194
 195 config BUSYBOX_CONFIG_LOGIN_SCRIPTS
 196         bool "Support for login scripts"
 197         depends on BUSYBOX_CONFIG_LOGIN
 198         default n
 199         help
 200           Enable this if you want login to execute $LOGIN_PRE_SUID_SCRIPT
 201           just prior to switching from root to logged-in user.
 202
 203 config BUSYBOX_CONFIG_FEATURE_NOLOGIN
 204         bool "Support for /etc/nologin"
 205         default n
 206         depends on BUSYBOX_CONFIG_LOGIN
 207         help
 208           The file /etc/nologin is used by (some versions of) login(1).
 209           If it exists, non-root logins are prohibited.
 210
 211 config BUSYBOX_CONFIG_FEATURE_SECURETTY
 212         bool "Support for /etc/securetty"
 213         default n
 214         depends on BUSYBOX_CONFIG_LOGIN
 215         help
 216           The file /etc/securetty is used by (some versions of) login(1).
 217           The file contains the device names of tty lines (one per line,
 218           without leading /dev/) on which root is allowed to login.
 219
 220 config BUSYBOX_CONFIG_PASSWD
 221         bool "passwd"
 222         default y
 223         select BUSYBOX_CONFIG_FEATURE_SUID
 224         select BUSYBOX_CONFIG_FEATURE_SYSLOG
 225         help
 226           passwd changes passwords for user and group accounts. A normal user
 227           may only change the password for his/her own account, the super user
 228           may change the password for any account. The administrator of a group
 229           may change the password for the group.
 230
 231           Note that Busybox binary must be setuid root for this applet to
 232           work properly.
 233
 234 config BUSYBOX_CONFIG_FEATURE_PASSWD_WEAK_CHECK
 235         bool "Check new passwords for weakness"
 236         default y
 237         depends on BUSYBOX_CONFIG_PASSWD
 238         help
 239           With this option passwd will refuse new passwords which are "weak".
 240
 241 config BUSYBOX_CONFIG_CRYPTPW
 242         bool "cryptpw"
 243         default n
 244         help
 245           Encrypts the given password with the crypt(3) libc function
 246           using the given salt. Debian has this utility under mkpasswd
 247           name. Busybox provides mkpasswd as an alias for cryptpw.
 248
 249 config BUSYBOX_CONFIG_CHPASSWD
 250         bool "chpasswd"
 251         default n
 252         help
 253           Reads a file of user name and password pairs from standard input
 254           and uses this information to update a group of existing users.
 255
 256 config BUSYBOX_CONFIG_SU
 257         bool "su"
 258         default n
 259         select BUSYBOX_CONFIG_FEATURE_SUID
 260         select BUSYBOX_CONFIG_FEATURE_SYSLOG
 261         help
 262           su is used to become another user during a login session.
 263           Invoked without a username, su defaults to becoming the super user.
 264
 265           Note that Busybox binary must be setuid root for this applet to
 266           work properly.
 267
 268 config BUSYBOX_CONFIG_FEATURE_SU_SYSLOG
 269         bool "Enable su to write to syslog"
 270         default n
 271         depends on BUSYBOX_CONFIG_SU
 272
 273 config BUSYBOX_CONFIG_FEATURE_SU_CHECKS_SHELLS
 274         bool "Enable su to check user's shell to be listed in /etc/shells"
 275         depends on BUSYBOX_CONFIG_SU
 276         default n
 277
 278 config BUSYBOX_CONFIG_SULOGIN
 279         bool "sulogin"
 280         default n
 281         select BUSYBOX_CONFIG_FEATURE_SYSLOG
 282         help
 283           sulogin is invoked when the system goes into single user
 284           mode (this is done through an entry in inittab).
 285
 286 config BUSYBOX_CONFIG_VLOCK
 287         bool "vlock"
 288         default n
 289         select BUSYBOX_CONFIG_FEATURE_SUID
 290         help
 291           Build the "vlock" applet which allows you to lock (virtual) terminals.
 292
 293           Note that Busybox binary must be setuid root for this applet to
 294           work properly.
 295
 296 endmenu