1/*
2 * Copyright (c) 1983, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35__attribute__((__used__))
36static const char copyright[] =
37"@(#) Copyright (c) 1983, 1993\n\
38	The Regents of the University of California.  All rights reserved.\n";
39#endif /* not lint */
40
41#ifndef lint
42#if 0
43static char sccsid[] = "@(#)rwho.c	8.1 (Berkeley) 6/6/93";
44#endif
45#endif /* not lint */
46
47#include <sys/cdefs.h>
48__FBSDID("$FreeBSD: src/usr.bin/rwho/rwho.c,v 1.18 2002/07/01 16:40:33 markm Exp $");
49
50#include <sys/param.h>
51#include <sys/file.h>
52
53#include <protocols/rwhod.h>
54
55#include <dirent.h>
56#include <err.h>
57#include <langinfo.h>
58#include <locale.h>
59#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62#include <time.h>
63#include <timeconv.h>
64#include <unistd.h>
65#ifdef __APPLE__
66#define UT_NAMESIZE 8
67#else
68#include <utmp.h>
69#endif
70
71DIR	*dirp;
72
73struct	whod wd;
74#define	NUSERS	1000
75struct	myutmp {
76	char    myhost[sizeof(wd.wd_hostname)];
77	int	myidle;
78	struct	outmp myutmp;
79} myutmp[NUSERS];
80int	nusers;
81
82#define	WHDRSIZE	(ssize_t)(sizeof (wd) - sizeof (wd.wd_we))
83/*
84 * this macro should be shared with ruptime.
85 */
86#define	down(w,now)	((now) - (w)->wd_recvtime > 11 * 60)
87
88time_t	now;
89int	aflg;
90
91static void usage(void);
92int utmpcmp(const void *, const void *);
93
94int
95main(int argc, char *argv[])
96{
97	int ch;
98	struct dirent *dp;
99	int width;
100	ssize_t cc;
101	register struct whod *w = &wd;
102	register struct whoent *we;
103	register struct myutmp *mp;
104	int f, n, i;
105	int d_first;
106
107	(void) setlocale(LC_TIME, "");
108	d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
109
110	while ((ch = getopt(argc, argv, "a")) != -1)
111		switch((char)ch) {
112		case 'a':
113			aflg = 1;
114			break;
115		case '?':
116		default:
117			usage();
118		}
119	argc -= optind;
120	argv += optind;
121
122	if (argc != 0)
123		usage();
124
125	if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
126		err(1, "%s", _PATH_RWHODIR);
127	mp = myutmp;
128	(void)time(&now);
129	while ((dp = readdir(dirp))) {
130		if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
131			continue;
132		f = open(dp->d_name, O_RDONLY);
133		if (f < 0)
134			continue;
135		cc = read(f, (char *)&wd, sizeof (struct whod));
136		if (cc < WHDRSIZE) {
137			(void) close(f);
138			continue;
139		}
140		if (down(w,now)) {
141			(void) close(f);
142			continue;
143		}
144		cc -= WHDRSIZE;
145		we = w->wd_we;
146		for (n = cc / sizeof (struct whoent); n > 0; n--) {
147			if (aflg == 0 && we->we_idle >= 60*60) {
148				we++;
149				continue;
150			}
151			if (nusers >= NUSERS)
152				errx(1, "too many users");
153			mp->myutmp = we->we_utmp; mp->myidle = we->we_idle;
154			(void) strcpy(mp->myhost, w->wd_hostname);
155			nusers++; we++; mp++;
156		}
157		(void) close(f);
158	}
159	qsort((char *)myutmp, nusers, sizeof (struct myutmp), utmpcmp);
160	mp = myutmp;
161	width = 0;
162	for (i = 0; i < nusers; i++) {
163		/* append one for the blank and use 8 for the out_line */
164		int j = strlen(mp->myhost) + 1 + sizeof(mp->myutmp.out_line);
165		if (j > width)
166			width = j;
167		mp++;
168	}
169	mp = myutmp;
170	for (i = 0; i < nusers; i++) {
171		char buf[BUFSIZ], cbuf[80];
172		time_t t = _int_to_time(mp->myutmp.out_time);
173
174		strftime(cbuf, sizeof(cbuf),
175			 d_first ? "%e %b %R" : "%b %e %R",
176			 localtime(&t));
177		(void)sprintf(buf, "%s:%-.*s", mp->myhost,
178		   (int)sizeof(mp->myutmp.out_line), mp->myutmp.out_line);
179		printf("%-*.*s %-*s %s",
180		   UT_NAMESIZE, (int)sizeof(mp->myutmp.out_name),
181		   mp->myutmp.out_name,
182		   width,
183		   buf,
184		   cbuf);
185		mp->myidle /= 60;
186		if (mp->myidle) {
187			if (aflg) {
188				if (mp->myidle >= 100*60)
189					mp->myidle = 100*60 - 1;
190				if (mp->myidle >= 60)
191					printf(" %2d", mp->myidle / 60);
192				else
193					printf("   ");
194			} else
195				printf(" ");
196			printf(":%02d", mp->myidle % 60);
197		}
198		printf("\n");
199		mp++;
200	}
201	exit(0);
202}
203
204
205static void
206usage(void)
207{
208	fprintf(stderr, "usage: rwho [-a]\n");
209	exit(1);
210}
211
212#define MYUTMP(a) ((const struct myutmp *)(a))
213
214int
215utmpcmp(const void *u1, const void *u2)
216{
217	int rc;
218
219	rc = strncmp(MYUTMP(u1)->myutmp.out_name, MYUTMP(u2)->myutmp.out_name,
220		sizeof(MYUTMP(u2)->myutmp.out_name));
221	if (rc)
222		return (rc);
223	rc = strcmp(MYUTMP(u1)->myhost, MYUTMP(u2)->myhost);
224	if (rc)
225		return (rc);
226	return (strncmp(MYUTMP(u1)->myutmp.out_line, MYUTMP(u2)->myutmp.out_line,
227		sizeof(MYUTMP(u2)->myutmp.out_line)));
228}
229