method

groups=

v1_9_3_125 - Show latest stable - 0 notes - Class: Process

groups=(p1) public

Set the supplemental group access list to the given Array of group IDs.

Process.groups   #=> [0, 1, 2, 3, 4, 6, 10, 11, 20, 26, 27]
Process.groups = [27, 6, 10, 11]   #=> [27, 6, 10, 11]
Process.groups   #=> [27, 6, 10, 11]

Show source

static VALUE
proc_setgroups(VALUE obj, VALUE ary)
{
    int ngroups, i;
    rb_gid_t *groups;
#ifdef HAVE_GETGRNAM_R
    long getgr_buf_len = sysconf(_SC_GETGR_R_SIZE_MAX);
    char* getgr_buf;

    if (getgr_buf_len < 0)
        getgr_buf_len = 4096;
    getgr_buf = ALLOCA_N(char, getgr_buf_len);
#endif

    Check_Type(ary, T_ARRAY);

    ngroups = RARRAY_LENINT(ary);
    if (ngroups > maxgroups())
        rb_raise(rb_eArgError, "too many groups, %d max", maxgroups());

    groups = ALLOCA_N(rb_gid_t, ngroups);

    for (i = 0; i < ngroups; i++) {
        VALUE g = RARRAY_PTR(ary)[i];

        if (FIXNUM_P(g)) {
            groups[i] = NUM2GIDT(g);
        }
        else {
            VALUE tmp = rb_check_string_type(g);
            struct group grp;
            struct group *p;
            int ret;

            if (NIL_P(tmp)) {
                groups[i] = NUM2GIDT(g);
            }
            else {
                const char *grpname = StringValueCStr(tmp);

#ifdef HAVE_GETGRNAM_R
                ret = getgrnam_r(grpname, &grp, getgr_buf, getgr_buf_len, &p);
                if (ret)
                    rb_sys_fail("getgrnam_r");
#else
                p = getgrnam(grpname);
#endif
                if (p == NULL) {
                    rb_raise(rb_eArgError,
                             "can't find group for %s", RSTRING_PTR(tmp));
                }
                groups[i] = p->gr_gid;
            }
        }
    }

    if (setgroups(ngroups, groups) == -1) /* ngroups <= maxgroups */
        rb_sys_fail(0);

    return proc_getgroups(obj);
}

groups=

Related methods