[[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.