GROUP.CONF(5)                                           Linux-PAM Manual                                           GROUP.CONF(5)



NAME
       group.conf - configuration file for the pam_group module

DESCRIPTION
       The pam_group PAM module does not authenticate the user, but instead it grants group memberships (in the credential
       setting phase of the authentication module) to the user. Such memberships are based on the service they are applying for.

       For this module to function correctly there must be a correctly formatted /etc/security/group.conf file present. White
       spaces are ignored and lines maybe extended with '\' (escaped newlines). Text following a '#' is ignored to the end of
       the line.

       The syntax of the lines is as follows:

       services;ttys;users;times;groups

       The first field, the services field, is a logic list of PAM service names that the rule applies to.

       The second field, the tty field, is a logic list of terminal names that this rule applies to.

       The third field, the users field, is a logic list of users or a netgroup of users to whom this rule applies.

       For these items the simple wildcard '*' may be used only once. With netgroups no wildcards or logic operators are
       allowed.

       The times field is used to indicate "when" these groups are to be given to the user. The format here is a logic list of
       day/time-range entries. The days are specified by a sequence of two character entries, MoTuSa for example is Monday
       Tuesday and Saturday. Note that repeated days are unset MoMo = no day, and MoWk = all weekdays bar Monday. The two
       character combinations accepted are Mo Tu We Th Fr Sa Su Wk Wd Al, the last two being week-end days and all 7 days of the
       week respectively. As a final example, AlFr means all days except Friday.

       Each day/time-range can be prefixed with a '!' to indicate "anything but". The time-range part is two 24-hour times HHMM,
       separated by a hyphen, indicating the start and finish time (if the finish time is smaller than the start time it is
       deemed to apply on the following day).

       The groups field is a comma or space separated list of groups that the user inherits membership of. These groups are
       added if the previous fields are satisfied by the user's request.

       For a rule to be active, ALL of service+ttys+users must be satisfied by the applying process.

EXAMPLES
       These are some example lines which might be specified in /etc/security/group.conf.

       Running 'xsh' on tty* (any ttyXXX device), the user 'us' is given access to the floppy (through membership of the floppy
       group)

           xsh;tty*&!ttyp*;us;Al0000-2400;floppy

       Running 'xsh' on tty* (any ttyXXX device), the user 'sword' is given access to games (through membership of the floppy
       group) after work hours.

           xsh; tty* ;sword;!Wk0900-1800;games, sound
           xsh; tty* ;*;Al0900-1800;floppy


SEE ALSO
       pam_group(8), pam.d(5), pam(8)

AUTHOR
       pam_group was written by Andrew G. Morgan <morganATkernel.org>.



Linux-PAM Manual                                           03/02/2009                                              GROUP.CONF(5)