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libuser.conf(5)						       libuser.conf(5)

NAME

libuser.conf - configuration for libuser and libuser utilities

FILE FORMAT

libuser.conf is a text file. Leading and trailing white space on each line is ignored. Lines starting with # are ignored. The file defines variables grouped into sections. Each section starts with a section header: [section name] A single section header can appear more than once in the file. The lines following a section header define variables from that sec- tion: variable = value The value can be empty. A variable can have more than one value, specified by using more than one line defining that variable. All currently defined variables accept only the first value and ignore the others, if any. [defaults] create_modules A list of module names to use when creating user or group entries, unless the application specifies a different list. The module names in the list can be separated using space, tab or comma. Default value is files shadow. crypt_style The algorithm to use for password encryption when creating new passwords. The current algorithm may be retained when changing a password of an existing user, depending on the application. Possible values are des, md5, blowfish, sha256 and sha512, all case-insensitive. Unrecognized values are treated as des. Default value is des. hash_rounds_min, hash_rounds_max These variables specify an inclusive range of hash rounds used when crypt_style is sha256 or sha512. A number of hash rounds is choosen from this interval randomly. A larger number of rounds makes password checking, and brute-force attempts to guess the password by reversing the hash, more CPU-intensive. The number of rounds is restricted to the interval [1000, 999999999]. If only one of the above variables is specified, the number of rounds used is specified by the other variable. If neither variable is specified, the number of rounds is chosen by libc. mailspooldir The directory containing user's mail spool files. Default value is /var/mail. moduledir The directory containing libuser modules. Default value uses the modules installed with libuser, corresponding to the architecture of the libuser library, e.g. /usr/lib/libuser or /usr/lib64/libuser (assuming libuser was configured with --pre- fix=/usr). modules A list of module names to use when not creating user or group entries, unless the application specifies a different list. The module names in the list can be separated using space, tab or comma. Default value is files shadow. skeleton The directory containing files to copy to newly created home directories. Default value is /etc/skel. [import] login_defs A path to the login.defs file from shadow. If this variable is defined, the variables from the named file are used in place of some libuser variables. Variables explicitly defined in libuser.conf are not affected by contents of login.defs. The following variables are imported: | Variable | Imported as ---------------------+------------------------------- ENCRYPT_METHOD | defaults/crypt_style GID_MIN | groupdefaults/LU_GIDNUMBER MAIL_DIR | defaults/mailspooldir MD5_CRYPT_ENAB | defaults/crypt_style PASS_MAX_DAYS | userdefaults/LU_SHADOWMAX PASS_MIN_DAYS | userdefaults/LU_SHADOWMIN PASS_WARN_AGE | userdefaults/LU_SHADOWWARNING SHA_CRYPT_MIN_ROUNDS | defaults/hash_rounds_min SHA_CRYPT_MAX_ROUNDS | defaults/hash_rounds_max UID_MIN | userdefaults/LU_UIDNUMBER The following variables are not imported: CREATE_HOME, GID_MAX, MAIL_FILE, SYSLOG_SG_ENAB, UID_MAX, UMASK, USERDEL_CMD, USER- GROUPS_ENAB default_useradd A path to the default/useradd file from useradd in shadow. If this variable is defined, the variables from the named file are used in place of some libuser variables. Variables explicitly defined in libuser.conf are not affected by contents of default/useradd. The following variables are imported: | Variable | Imported as ---------+-------------------------------- EXPIRE | userdefaults/LU_SHADOWEXPIRE GROUP | userdefaults/LU_GIDNUMBER INACTIVE | userdefaults/LU_SHADOWINACTIVE SHELL | userdefaults/LU_LOGINSHELL SKEL | defaults/skeleton The HOME variable is not imported. [userdefaults] This section defines attribute values of newly created user entities. There is one special variable: LU_UIDNUMBER A decimal number, the first allowed UID value for regular users (not system users). Default value is 500. All other variables have the same names as the attribute names from <libuser/entity.h> and define attribute values. Either the macro name (e.g. LU_GECOS) or the macro content (e.g. pw_gecos) can be used; if both are used, the one appearing later in the configuration file is used. The % character in the value of the variable introduces an escape sequence: %n is replaced by the user name, %d is replaced by current date in days since the epoch, %u is replaced by the user's UID. There is no way to escape the % character and avoid this substitution. After the userdefaults section is processed, modules may define addi- tional attributes or even override the attributes defined in this sec- tion. [groupdefaults] The groupdefaults section is similar to userdefaults. There is one special variable: LU_GIDNUMBER A decimal number, the first allowed GID value for regular groups (not system groups). Default value is 500. The other variables follow the same rules as in the userdefaults sec- tion, except that %n and %u are replaced by the group name and group's GID, respectively. After the groupdefaults section is processed, modules may define addi- tional attributes or even override the attributes defined in this sec- tion. [files] Configures the files module, which manages /etc/group and /etc/passwd. The configuration variables are probably useful only for libuser devel- opment. directory The directory containing the group and passwd files. Default value is /etc. nonroot Allow module initialization when not invoked as the root user if the value is yes. [shadow] Configures the files module, which manages /etc/gshadow and /etc/shadow. The configuration variables are probably useful only for libuser development. directory The directory containing the gshadow and shadow files. Default value is /etc. nonroot Allow module initialization when not invoked as the root user if the value is yes. [ldap] Configures the ldap module, which manages an user database accessible using LDAP. userBranch The LDAP suffix for user entities. Default value is ou=People. groupBranch The LDAP suffix for group entities. Default value is ou=Group. server A domain name or an URI of the LDAP server. The URI can use the ldap or the ldaps protocol. When a simple domain name is used, the connection fails if TLS can not be used; an URI using the ldap protocol allows connection without TLS. Default value is ldap. basedn The base DN of the server. Default value is dc=example,dc=com. binddn A DN for binding to the server. If the value is empty or bind- ing using this DN fails, a DN of uid=user,userBranch,basedn is used, where userBranch and basedn are variables from this sec- tion and user is the user name of the invoking user, unless overridden by the user variable from this section. Default value is cn=manager,dc=example,dc=com. user The SASLv2 identity for authenticating to the LDAP server, also overrides the user name for generating a bind DN. Default value is the name of the invoking user. authuser The SASLv2 authorization user, if non-empty. Default value is empty. bindtype The list of bind types to use, separated by commas. Allowed bind types are simple, sasl, and sasl/mechanism, where mechanism is a SASL mechanism. The bind types (but not necessarily mecha- nism) are case-insensitive. If more than one bind type is spec- ified, their relative order is ignored. Default value is sim- ple,sasl. [sasl] Configures the sasl module, which manages a SASLv2 user database. appname Name of the SASLv2 application. Default value is empty. domain Domain used by libuser for the SASLv2 authentication object. Default value is empty.

BUGS

Invalid lines in the configuration file (or the imported shadow config- uration files) are silently ignored.

FILES

/etc/libuser.conf The default location of the configuration file. Can be overrid- den by the LIBUSER_CONF environment variable, except in set-uid or set-gid programs. libuser Jan 7 2008 libuser.conf(5)

1994 Man-cgi 1.15, Panagiotis Christias <christia@theseas.ntua.gr>