/*-
* Copyright (c) 2014 Pietro Cerutti <gahr@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/capsicum.h>
#include <capsicum_helpers.h>
#include <err.h>
#include <errno.h>
#include <utmpx.h>
#include <algorithm>
#include <iostream>
#include <iterator>
#include <set>
#include <string>
using namespace std;
int
main(int argc, char **)
{
struct utmpx *ut;
set<string> names;
if (argc > 1) {
cerr << "usage: users" << endl;
return (1);
}
setutxent();
if (caph_enter())
err(1, "Failed to enter capability mode.");
while ((ut = getutxent()) != NULL)
if (ut->ut_type == USER_PROCESS)
names.insert(ut->ut_user);
endutxent();
if (!names.empty()) {
set<string>::iterator last = names.end();
--last;
copy(names.begin(), last, ostream_iterator<string>(cout, " "));
cout << *last << endl;
}
}
