NAME
setgroups —
set group access
list
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/param.h>
#include <unistd.h>
int
setgroups(
int
ngroups,
const gid_t
*gidset);
DESCRIPTION
setgroups() sets the group access list of the current user
process according to the array
gidset. The parameter
ngroups indicates the number of entries in the array and
must be no more than {
NGROUPS_MAX
}.
Only the super-user may set new groups.
This system call affects only secondary groups.
RETURN VALUES
A 0 value is returned on success, -1 on error, with an error code stored in
errno.
ERRORS
The
setgroups() call will fail if:
-
-
- [
EINVAL
]
- The value of ngroups is greater than
{
NGROUPS_MAX
}.
-
-
- [
EPERM
]
- The caller is not the super-user.
-
-
- [
EFAULT
]
- The address specified for gidset is
outside the process address space.
SEE ALSO
getgroups(2),
setegid(2),
setgid(2),
setregid(2),
initgroups(3)
HISTORY
The
setgroups() function call appeared in
4.2BSD.