[[tags: egg]]
== posix-groups
[[toc:]]
This egg provides an interface to POSIX group information, allowing one
to retrieve group file entries and get or set the supplementary group
IDs of a process.
The procedures in this extension correspond roughly to the {{getgrnam}},
{{getgroups}}, {{setgroups}} and {{initgroups}} C library functions.
=== Retrieving group information
==== group-information
(group-information GROUP)
If {{GROUP}} specifies a valid group name or group ID, then this
procedure returns a list of four values: the group-name, the encrypted
group password, the group ID and a list of the names of all group
members. If no group with the given name or ID exists, then {{#f}} is
returned.
==== get-groups
(get-groups)
Returns a list with the supplementary group IDs of the current user.
=== Changing group information
==== set-groups!
(set-groups! GIDLIST)
Sets the supplementrary group IDs of the current user to the IDs given
in the list {{GIDLIST}}.
Only the superuser may invoke this procedure.
==== initialize-groups
(initialize-groups USERNAME BASEGID)
Sets the supplementary group IDs of the current user to the IDs from the
user with name {{USERNAME}} (a string), including {{BASEGID}}.
Only the superuser may invoke this procedure.
=== Author
The CHICKEN Team
=== License
Copyright (c) 2016, The CHICKEN Team
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
Neither the name of the author nor the names of its contributors may
be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
=== Version History
; 1.0 : Taken from the posix unit and released as an egg for CHICKEN 5.