1268500Sed/*- 2268491Sgahr * Copyright (c) 2014 Pietro Cerutti <gahr@FreeBSD.org> 3268491Sgahr * All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 4. Neither the name of the University nor the names of its contributors 141590Srgrimes * may be used to endorse or promote products derived from this software 151590Srgrimes * without specific prior written permission. 161590Srgrimes * 171590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271590Srgrimes * SUCH DAMAGE. 281590Srgrimes */ 291590Srgrimes 30330464Seadler#include <sys/capsicum.h> 31268491Sgahr#include <sys/cdefs.h> 32268491Sgahr__FBSDID("$FreeBSD: stable/11/usr.bin/users/users.cc 330464 2018-03-05 08:27:29Z eadler $"); 331590Srgrimes 34330464Seadler#include <err.h> 35330464Seadler#include <errno.h> 36202200Sed#include <utmpx.h> 371590Srgrimes 38268491Sgahr#include <algorithm> 39268491Sgahr#include <iostream> 40268491Sgahr#include <iterator> 41268500Sed#include <set> 42268491Sgahr#include <string> 43268491Sgahrusing namespace std; 441590Srgrimes 4528789Scharnierint 46268491Sgahrmain(int argc, char **) 471590Srgrimes{ 48200154Sed struct utmpx *ut; 49268498Sed set<string> names; 501590Srgrimes 51268491Sgahr if (argc > 1) { 52268491Sgahr cerr << "usage: users" << endl; 53268491Sgahr return (1); 54268491Sgahr } 551590Srgrimes 56200154Sed setutxent(); 57330464Seadler 58330464Seadler if (cap_enter() < 0 && errno != ENOSYS) 59330464Seadler err(1, "Failed to enter capability mode."); 60330464Seadler 61268498Sed while ((ut = getutxent()) != NULL) 62268498Sed if (ut->ut_type == USER_PROCESS) 63268498Sed names.insert(ut->ut_user); 64200154Sed endutxent(); 65268491Sgahr 66268498Sed if (!names.empty()) { 67268500Sed set<string>::iterator last = names.end(); 68268498Sed --last; 69268498Sed copy(names.begin(), last, ostream_iterator<string>(cout, " ")); 70268498Sed cout << *last << endl; 711590Srgrimes } 7228563Scharnier} 73