e8df2232e0
- Use set instead of std::set, to be consistent with the rest of the file. - Remove return (0); it's not required. - Add a dash at the beginning of the copyright, per style(9).
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
/*-
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* Copyright (c) 2014 Pietro Cerutti <gahr@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <utmpx.h>
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#include <algorithm>
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#include <iostream>
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#include <iterator>
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#include <set>
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#include <string>
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using namespace std;
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int
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main(int argc, char **)
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{
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struct utmpx *ut;
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set<string> names;
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if (argc > 1) {
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cerr << "usage: users" << endl;
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return (1);
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}
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setutxent();
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while ((ut = getutxent()) != NULL)
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if (ut->ut_type == USER_PROCESS)
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names.insert(ut->ut_user);
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endutxent();
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if (!names.empty()) {
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set<string>::iterator last = names.end();
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--last;
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copy(names.begin(), last, ostream_iterator<string>(cout, " "));
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cout << *last << endl;
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}
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}
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