Name
initgroups — initialize the supplementary group access list
Synopsis
#include <sys/types.h> #include <grp.h>
int
initgroups( |
const char *user, |
gid_t group); |
![[Note]](../stylesheet/note.png) |
Note | ||||
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DESCRIPTION
The initgroups() function
initializes the group access list by reading the group
database /etc/group and using
all groups of which user is a member. The
additional group group is also added to the
list.
The user argument
must be non-NULL.
RETURN VALUE
The initgroups() function
returns 0 on success. On error, −1 is returned, and
errno is set appropriately.
ERRORS
- ENOMEM
-
Insufficient memory to allocate group information structure.
- EPERM
-
The calling process has insufficient privilege. See the underlying system call setgroups(2).
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
initgroups() |
Thread safety | MT-Safe locale |
COLOPHON
This page is part of release 4.07 of the Linux man-pages project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man−pages/.
|
Copyright 1993 David Metcalfe (davidprism.demon.co.uk) %%%LICENSE_START(VERBATIM) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date. The author(s) assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. The author(s) may not have taken the same level of care in the production of this manual, which is licensed free of charge, as they might when working professionally. Formatted or processed versions of this manual, if unaccompanied by the source, must acknowledge the copyright and authors of this work. %%%LICENSE_END References consulted: Linux libc source code Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) 386BSD man pages Modified 1993-07-24 by Rik Faith <faithcs.unc.edu> Modified 2004-10-10 by aeb |