ruptime.c revision 9643 
1/*
2 * Copyright (c) 1983, 1993, 1994
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/* $Id$ */
35
36#ifndef lint
37static char copyright[] =
38"@(#) Copyright (c) 1983, 1993, 1994\n\
39	The Regents of the University of California.  All rights reserved.\n";
40#endif /* not lint */
41
42#ifndef lint
43static char sccsid[] = "@(#)ruptime.c	8.2 (Berkeley) 4/5/94";
44#endif /* not lint */
45
46#include <sys/param.h>
47
48#include <protocols/rwhod.h>
49
50#include <dirent.h>
51#include <err.h>
52#include <errno.h>
53#include <fcntl.h>
54#include <stdio.h>
55#include <stdlib.h>
56#include <string.h>
57#include <time.h>
58#include <tzfile.h>
59#include <unistd.h>
60
61struct hs {
62	struct	whod *hs_wd;
63	int	hs_nusers;
64} *hs;
65struct	whod awhod;
66
67#define	ISDOWN(h)		(now - (h)->hs_wd->wd_recvtime > 11 * 60)
68#define	WHDRSIZE	(sizeof (awhod) - sizeof (awhod.wd_we))
69
70size_t nhosts;
71time_t now;
72int rflg = 1;
73
74int	 hscmp __P((const void *, const void *));
75char	*interval __P((time_t, char *));
76int	 lcmp __P((const void *, const void *));
77void	 morehosts __P((void));
78int	 tcmp __P((const void *, const void *));
79int	 ucmp __P((const void *, const void *));
80void	 usage __P((void));
81
82int
83main(argc, argv)
84	int argc;
85	char **argv;
86{
87	extern int optind;
88	struct dirent *dp;
89	struct hs *hsp;
90	struct whod *wd;
91	struct whoent *we;
92	DIR *dirp;
93	size_t hspace;
94	int aflg, cc, ch, fd, i, maxloadav;
95	char buf[sizeof(struct whod)];
96	int (*cmp) __P((const void *, const void *));
97
98	aflg = 0;
99	cmp = hscmp;
100	while ((ch = getopt(argc, argv, "alrut")) != EOF)
101		switch (ch) {
102		case 'a':
103			aflg = 1;
104			break;
105		case 'l':
106			cmp = lcmp;
107			break;
108		case 'r':
109			rflg = -1;
110			break;
111		case 't':
112			cmp = tcmp;
113			break;
114		case 'u':
115			cmp = ucmp;
116			break;
117		default:
118			usage();
119		}
120	argc -= optind;
121	argv += optind;
122
123	if (argc != 0)
124		usage();
125
126	if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
127		err(1, "%s", _PATH_RWHODIR);
128
129	maxloadav = -1;
130	for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) {
131		if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
132			continue;
133		if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) {
134			warn("%s", dp->d_name);
135			continue;
136		}
137		cc = read(fd, buf, sizeof(struct whod));
138		(void)close(fd);
139
140		if (cc < WHDRSIZE)
141			continue;
142		if (nhosts == hspace) {
143			if ((hs =
144			    realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL)
145				err(1, NULL);
146			hsp = hs + nhosts;
147		}
148
149		if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL)
150			err(1, NULL);
151		memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE);
152
153		for (wd = (struct whod *)buf, i = 0; i < 2; ++i)
154			if (wd->wd_loadav[i] > maxloadav)
155				maxloadav = wd->wd_loadav[i];
156
157		for (hsp->hs_nusers = 0,
158		    we = (struct whoent *)(buf + cc); --we >= wd->wd_we;)
159			if (aflg || we->we_idle < 3600)
160				++hsp->hs_nusers;
161		++hsp;
162		++nhosts;
163	}
164	if (nhosts == 0)
165		errx(0, "no hosts in %s.", _PATH_RWHODIR);
166
167	(void)time(&now);
168	qsort(hs, nhosts, sizeof(hs[0]), cmp);
169	for (i = 0; i < nhosts; i++) {
170		hsp = &hs[i];
171		if (ISDOWN(hsp)) {
172			(void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname,
173			    interval(now - hsp->hs_wd->wd_recvtime, "down"));
174			continue;
175		}
176		(void)printf(
177		    "%-12.12s%s,  %4d user%s  load %*.2f, %*.2f, %*.2f\n",
178		    hsp->hs_wd->wd_hostname,
179		    interval((time_t)hsp->hs_wd->wd_sendtime -
180			(time_t)hsp->hs_wd->wd_boottime, "  up"),
181		    hsp->hs_nusers,
182		    hsp->hs_nusers == 1 ? ", " : "s,",
183		    maxloadav >= 1000 ? 5 : 4,
184			hsp->hs_wd->wd_loadav[0] / 100.0,
185		    maxloadav >= 1000 ? 5 : 4,
186		        hsp->hs_wd->wd_loadav[1] / 100.0,
187		    maxloadav >= 1000 ? 5 : 4,
188		        hsp->hs_wd->wd_loadav[2] / 100.0);
189	}
190	exit(0);
191}
192
193char *
194interval(tval, updown)
195	time_t tval;
196	char *updown;
197{
198	static char resbuf[32];
199	int days, hours, minutes;
200
201	if (tval < 0) {
202		(void)snprintf(resbuf, sizeof(resbuf), "   %s ??:??", updown);
203		return (resbuf);
204	}
205						/* round to minutes. */
206	minutes = (tval + (SECSPERMIN - 1)) / SECSPERMIN;
207	hours = minutes / MINSPERHOUR;
208	minutes %= MINSPERHOUR;
209	days = hours / HOURSPERDAY;
210	hours %= HOURSPERDAY;
211	if (days)
212		(void)snprintf(resbuf, sizeof(resbuf),
213		    "%s %2d+%02d:%02d", updown, days, hours, minutes);
214	else
215		(void)snprintf(resbuf, sizeof(resbuf),
216		    "%s    %2d:%02d", updown, hours, minutes);
217	return (resbuf);
218}
219
220#define	HS(a)	((struct hs *)(a))
221
222/* Alphabetical comparison. */
223int
224hscmp(a1, a2)
225	const void *a1, *a2;
226{
227	return (rflg *
228	    strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname));
229}
230
231/* Load average comparison. */
232int
233lcmp(a1, a2)
234	const void *a1, *a2;
235{
236	if (ISDOWN(HS(a1)))
237		if (ISDOWN(HS(a2)))
238			return (tcmp(a1, a2));
239		else
240			return (rflg);
241	else if (ISDOWN(HS(a2)))
242		return (-rflg);
243	else
244		return (rflg *
245		   (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0]));
246}
247
248/* Number of users comparison. */
249int
250ucmp(a1, a2)
251	const void *a1, *a2;
252{
253	if (ISDOWN(HS(a1)))
254		if (ISDOWN(HS(a2)))
255			return (tcmp(a1, a2));
256		else
257			return (rflg);
258	else if (ISDOWN(HS(a2)))
259		return (-rflg);
260	else
261		return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers));
262}
263
264/* Uptime comparison. */
265int
266tcmp(a1, a2)
267	const void *a1, *a2;
268{
269	return (rflg * (
270		(ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now
271		    : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime)
272		-
273		(ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now
274		    : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime)
275	));
276}
277
278void
279usage()
280{
281	(void)fprintf(stderr, "usage: ruptime [-alrut]\n");
282	exit(1);
283}
284