huschi.net

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 UNIX
       group, or a netgroup of users to whom this rule applies. Group names
       are preceded by a '%' symbol, while netgroup names are preceded by a
       '@' symbol.
       For these items the simple wildcard '*' may be used only once. With
       UNIX groups or 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

       Any member of the group 'admin' running 'xsh' on tty*, is granted
       access (at any time) to the group 'plugdev'
           xsh; tty* ;%admin;Al0000-2400;plugdev

SEE ALSO
       pam_group(8), pam.d(5), pam(8)
AUTHOR
       pam_group was written by Andrew G. Morgan <morgan AT kernel.org>.

Linux-PAM Manual                  09/19/2013                     GROUP.CONF(5)