2 # For a description of the syntax of this configuration file,
3 # see scripts/kbuild/config-language.txt.
6 menu "Login/Password Management Utilities"
8 config FEATURE_SHADOWPASSWDS
9 bool "Support for shadow passwords"
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
17 bool "Use internal password and group functions rather than system functions"
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.
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.
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.
39 If you enable this option, it will add about 1.5k.
42 bool "Use internal shadow password functions"
44 depends on USE_BB_PWD_GRP && FEATURE_SHADOWPASSWDS
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.
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.
61 bool "Use internal DES and MD5 crypt functions"
64 Busybox has internal DES and MD5 crypt functions.
65 They produce results which are identical to corresponding
66 standard C library functions.
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.
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.
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.
86 Utility for creating a new group account.
88 config FEATURE_ADDUSER_TO_GROUP
89 bool "Support for adding users to groups"
93 If called with two non-option arguments,
94 addgroup will add an existing user to an
101 Utility for deleting a group account.
103 config FEATURE_DEL_USER_FROM_GROUP
104 bool "Support for removing users from groups."
108 If called with two non-option arguments, deluser
109 or delgroup will remove an user from a specified group.
111 config FEATURE_CHECK_NAMES
112 bool "Enable sanity check on user/group names in adduser and addgroup"
114 depends on ADDUSER || ADDGROUP
116 Enable sanity check on user and group names in adduser and addgroup.
117 To avoid problems, the user or group name should consist only of
118 letters, digits, underscores, periods, at signs and dashes,
119 and not start with a dash (as defined by IEEE Std 1003.1-2001).
120 For compatibility with Samba machine accounts "$" is also supported
121 at the end of the user or group name.
127 Utility for creating a new user account.
129 config FEATURE_ADDUSER_LONG_OPTIONS
130 bool "Enable long options"
132 depends on ADDUSER && GETOPT_LONG
134 Support long options for the adduser applet.
140 Utility for deleting a user account.
145 select FEATURE_SYSLOG
147 getty lets you log in on a tty, it is normally invoked by init.
150 bool "Support utmp file"
151 depends on GETTY || LOGIN || SU || WHO
154 The file /var/run/utmp is used to track who is currently logged in.
157 bool "Support wtmp file"
158 depends on GETTY || LOGIN || SU || LAST
162 The file /var/run/wtmp is used to track when user's have logged into
163 and logged out of the system.
169 select FEATURE_SYSLOG
171 login is used when signing onto a system.
173 Note that Busybox binary must be setuid root for this applet to
177 bool "Support for PAM (Pluggable Authentication Modules)"
181 Use PAM in login(1) instead of direct access to password database.
184 bool "Support for login scripts"
188 Enable this if you want login to execute $LOGIN_PRE_SUID_SCRIPT
189 just prior to switching from root to logged-in user.
191 config FEATURE_NOLOGIN
192 bool "Support for /etc/nologin"
196 The file /etc/nologin is used by (some versions of) login(1).
197 If it exists, non-root logins are prohibited.
199 config FEATURE_SECURETTY
200 bool "Support for /etc/securetty"
204 The file /etc/securetty is used by (some versions of) login(1).
205 The file contains the device names of tty lines (one per line,
206 without leading /dev/) on which root is allowed to login.
212 select FEATURE_SYSLOG
214 passwd changes passwords for user and group accounts. A normal user
215 may only change the password for his/her own account, the super user
216 may change the password for any account. The administrator of a group
217 may change the password for the group.
219 Note that Busybox binary must be setuid root for this applet to
222 config FEATURE_PASSWD_WEAK_CHECK
223 bool "Check new passwords for weakness"
227 With this option passwd will refuse new passwords which are "weak".
233 Applet for crypting a string.
239 chpasswd reads a file of user name and password pairs from
240 standard input and uses this information to update a group of
247 select FEATURE_SYSLOG
249 su is used to become another user during a login session.
250 Invoked without a username, su defaults to becoming the super user.
252 Note that Busybox binary must be setuid root for this applet to
255 config FEATURE_SU_SYSLOG
256 bool "Enable su to write to syslog"
260 config FEATURE_SU_CHECKS_SHELLS
261 bool "Enable su to check user's shell to be listed in /etc/shells"
268 select FEATURE_SYSLOG
270 sulogin is invoked when the system goes into single user
271 mode (this is done through an entry in inittab).
278 Build the "vlock" applet which allows you to lock (virtual) terminals.
280 Note that Busybox binary must be setuid root for this applet to