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Man page of INITGROUPS
INITGROUPS
Section: Linux Programmer's Manual (3)
Updated: 2016-03-15
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NAME
initgroups - initialize the supplementary group access list
SYNOPSIS
#include <sys/types.h>
#include <grp.h>
int initgroups(const char *user, gid_t group);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
initgroups():
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE
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).
FILES
/etc/group group database file
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
initgroups()
| Thread safety | MT-Safe locale
|
CONFORMING TO
SVr4, 4.3BSD.
SEE ALSO
getgroups(2),
setgroups(2),
credentials(7)
COLOPHON
This page is part of release 4.09 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- FILES
-
- ATTRIBUTES
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
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