GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/users/users.c Lines: 0 28 0.0 %
Date: 2017-11-13 Branches: 0 20 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: users.c,v 1.13 2015/10/09 01:37:09 deraadt Exp $	*/
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/*	$NetBSD: users.c,v 1.5 1994/12/20 15:58:19 jtc Exp $	*/
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/*
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 * Copyright (c) 1980, 1987, 1993
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 *	The Regents of the University of California.  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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 * 3. 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/types.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <utmp.h>
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typedef char	namebuf[UT_NAMESIZE];
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int scmp(const void *, const void *);
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int
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main(int argc, char *argv[])
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{
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	namebuf *names = NULL;
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	int ncnt = 0;
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	int nmax = 0;
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	int cnt;
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	struct utmp utmp;
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	int ch;
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	if (pledge("stdio rpath flock cpath wpath", NULL) == -1)
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		err(1, "pledge");
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	while ((ch = getopt(argc, argv, "")) != -1)
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		switch(ch) {
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		case '?':
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		default:
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			(void)fprintf(stderr, "usage: users\n");
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			exit(1);
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		}
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	argc -= optind;
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	argv += optind;
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	if (!freopen(_PATH_UTMP, "r", stdin)) {
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		err(1, "can't open %s", _PATH_UTMP);
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		/* NOTREACHED */
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	}
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	while (fread((char *)&utmp, sizeof(utmp), 1, stdin) == 1) {
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		if (*utmp.ut_name) {
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			if (ncnt >= nmax) {
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				size_t newmax = nmax + 32;
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				namebuf *newnames;
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				newnames = reallocarray(names, newmax,
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				    sizeof(*names));
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				if (newnames == NULL) {
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					err(1, NULL);
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					/* NOTREACHED */
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				}
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				names = newnames;
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				nmax = newmax;
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			}
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			(void)strncpy(names[ncnt], utmp.ut_name, UT_NAMESIZE);
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			++ncnt;
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		}
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	}
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	if (ncnt) {
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		qsort(names, ncnt, UT_NAMESIZE, scmp);
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		(void)printf("%.*s", UT_NAMESIZE, names[0]);
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		for (cnt = 1; cnt < ncnt; ++cnt)
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			if (strncmp(names[cnt], names[cnt - 1], UT_NAMESIZE))
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				(void)printf(" %.*s", UT_NAMESIZE, names[cnt]);
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		(void)printf("\n");
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	}
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	exit(0);
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}
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int
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scmp(const void *p, const void *q)
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{
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	return(strncmp((char *) p, (char *) q, UT_NAMESIZE));
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}