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(7)
AUTHOR¶
pam_group was written by Andrew G. Morgan <morgan@kernel.org>.