GETGROUPLIST(3) | Library Functions Manual | GETGROUPLIST(3) |
getgrouplist
, getgroupmembership
—
#include <unistd.h>
int
getgrouplist
(const
char *name, gid_t
basegid, gid_t
*groups, int
*ngroups);
int
getgroupmembership
(const
char *name, gid_t
basegid, gid_t
*groups, int
maxgrp, int
*ngroups);
getgrouplist
() and
getgroupmembership
() functions read through the group
database and calculate the group access list for the user specified in
name. The basegid is automatically
included in the groups list. Typically this value is given as the group number
from the password database.
The resulting group list is returned in the integer array pointed to by groups.
For getgrouplist
(), the caller specifies
the size of the groups array in the integer pointed to
by ngroups.
For getgroupmembership
(), the caller
specifies the size of the groups array in
maxgrp.
The actual number of groups found is returned in ngroups.
Duplicate group ids will be suppressed from the result.
getgrouplist
() and
getgroupmembership
() functions return 0 if successful,
and return -1 if the size of the group list is too small to hold all the
user's groups. In the latter case, the groups array will
be filled with as many groups as will fit and ngroups
will contain the total number of groups found.
getgrouplist
() function first appeared in
4.4BSD. The
getgroupmembership
() function first appeared in
NetBSD 3.0 to address an API deficiency in
getgrouplist
().
getgrouplist
() function uses the routines based on
getgrent(3). If the invoking
program uses any of these routines, the group structure will be overwritten in
the call to getgrouplist
().
January 6, 2005 | NetBSD 9.2 |