Method: Process.groups

Defined in:
process.c

.groups ⇒ Array

Get an Array of the group IDs in the supplemental group access list for this process.

Process.groups   #=> [27, 6, 10, 11]

Note that this method is just a wrapper of getgroups(2). This means that the following characteristics of the result completely depend on your system:

  • the result is sorted

  • the result includes effective GIDs

  • the result does not include duplicated GIDs

You can make sure to get a sorted unique GID list of the current process by this expression:

Process.groups.uniq.sort

Returns:



6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
 
# File 'process.c', line 6810

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;
}