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Man page of initgroups
initgroups
Section: C Library Functions (3)
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NAME
initgroups - Initializes concurrent group set
LIBRARY
Standard C Library (libc.a)
SYNOPSIS
int initgroups (
char *user,
gid_t base_gid );
PARAMETERS
Specifies the user whose groups are to be used
to initialize the group set.
Specifies an additional group to include
in the group set.
DESCRIPTION
The initgroups() function reads the defined group membership
of the specified user and sets the concurrent group set of
the current process to that value. The base_gid parameter
is always included in the concurrent group set, and is normally
the principal user's group. If the user is in more than NGROUPS_MAX
groups, only NGROUPS_MAX groups are set, including the base_gid
group.
CAUTION
The initgroups() function
uses the sia_get_groups() function to set up the group array.
If the program that invokes initgroups()
uses any of these functions, then calling initgroups()
overwrites the static group structure.
RETURN VALUES
Upon successful completion, the initgroups() function
returns 0 (zero). If the initgroups() function fails,
1 is returned and errno is
set to indicate the error.
ERRORS
If the initgroups()
function fails,
errno
may be set to the following value:
The calling process does not have the appropriate
privilege in its current effective privilege set.
RELATED INFORMATION
Functions:
getgroups(2),
setgroups(2),
getgid(2)
sia_get_groups(3)
Commands:
groups(1)
delim off
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- PARAMETERS
-
- DESCRIPTION
-
- CAUTION
-
- RETURN VALUES
-
- ERRORS
-
- RELATED INFORMATION
-
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Time: 02:40:54 GMT, October 02, 2010