75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
/*-
|
|
* 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;
|
|
}
|
|
}
|