Method: Process.groups

Defined in:
process.c

.groups ⇒ Array

Returns an array of the group IDs in the supplemental group access list for the current process:

Process.groups # => [4, 24, 27, 30, 46, 122, 135, 136, 1000]

These properties of the returned array are system-dependent:

  • Whether (and how) the array is sorted.

  • Whether the array includes effective group IDs.

  • Whether the array includes duplicate group IDs.

  • Whether the array size exceeds the value of Process.maxgroups.

Use this call to get a sorted and unique array:

Process.groups.uniq.sort

Returns:



6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
 
# File 'process.c', line 6863

static VALUE
proc_getgroups(VALUE obj)
{
    VALUE ary, tmp;
    int i, ngroups;
    rb_gid_t *groups;

    ngroups = getgroups(0, NULL);
    if (ngroups == -1)
        rb_sys_fail(0);

    groups = ALLOCV_N(rb_gid_t, tmp, ngroups);

    ngroups = getgroups(ngroups, groups);
    if (ngroups == -1)
        rb_sys_fail(0);

    ary = rb_ary_new();
    for (i = 0; i < ngroups; i++)
        rb_ary_push(ary, GIDT2NUM(groups[i]));

    ALLOCV_END(tmp);

    return ary;
}