rup.c revision 95616 
1/*-
2 * Copyright (c) 1993, John Brezak
3 * 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#include <sys/cdefs.h>
35
36__FBSDID("$FreeBSD: head/usr.bin/rup/rup.c 95616 2002-04-28 10:49:15Z markm $");
37
38#include <sys/param.h>
39#include <sys/socket.h>
40
41#include <rpc/rpc.h>
42#include <rpc/pmap_clnt.h>
43
44#undef FSHIFT			/* Use protocol's shift and scale values */
45#undef FSCALE
46
47#include <rpcsvc/rstat.h>
48
49#include <arpa/inet.h>
50
51#include <err.h>
52#include <netdb.h>
53#include <stdio.h>
54#include <string.h>
55#include <stdlib.h>
56#include <time.h>
57#include <unistd.h>
58
59#define HOST_WIDTH 15
60
61struct host_list {
62	struct host_list *next;
63	struct in_addr addr;
64} *hosts;
65
66static int
67search_host(struct in_addr addr)
68{
69	struct host_list *hp;
70
71	if (!hosts)
72		return(0);
73
74	for (hp = hosts; hp != NULL; hp = hp->next) {
75		if (hp->addr.s_addr == addr.s_addr)
76			return(1);
77	}
78	return(0);
79}
80
81static void
82remember_host(struct in_addr addr)
83{
84	struct host_list *hp;
85
86	if (!(hp = (struct host_list *)malloc(sizeof(struct host_list))))
87		errx(1, "no memory");
88	hp->addr.s_addr = addr.s_addr;
89	hp->next = hosts;
90	hosts = hp;
91}
92
93static int
94rstat_reply(caddr_t replyp, struct sockaddr_in *raddrp)
95{
96	struct tm *tmp_time;
97	struct tm host_time;
98	struct tm host_uptime;
99	char days_buf[16];
100	char hours_buf[16];
101	struct hostent *hp;
102	char *host;
103	statstime *host_stat = (statstime *)replyp;
104
105	if (search_host(raddrp->sin_addr))
106		return(0);
107
108	hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
109			   sizeof(struct in_addr), AF_INET);
110	if (hp)
111		host = hp->h_name;
112	else
113		host = inet_ntoa(raddrp->sin_addr);
114
115	/* truncate hostname to fit nicely into field */
116	if (strlen(host) > HOST_WIDTH)
117		host[HOST_WIDTH] = '\0';
118
119	printf("%-*s\t", HOST_WIDTH, host);
120
121	tmp_time = localtime((time_t *)&host_stat->curtime.tv_sec);
122	host_time = *tmp_time;
123
124	host_stat->curtime.tv_sec -= host_stat->boottime.tv_sec;
125
126	tmp_time = gmtime((time_t *)&host_stat->curtime.tv_sec);
127	host_uptime = *tmp_time;
128
129	#define updays (host_stat->curtime.tv_sec  / 86400)
130	if (host_uptime.tm_yday != 0)
131		sprintf(days_buf, "%3d day%s, ", updays,
132			(updays > 1) ? "s" : "");
133	else
134		days_buf[0] = '\0';
135
136	if (host_uptime.tm_hour != 0)
137		sprintf(hours_buf, "%2d:%02d, ",
138			host_uptime.tm_hour, host_uptime.tm_min);
139	else
140		if (host_uptime.tm_min != 0)
141			sprintf(hours_buf, "%2d mins, ", host_uptime.tm_min);
142		else if (host_stat->curtime.tv_sec < 60)
143			sprintf(hours_buf, "%2d secs, ", host_uptime.tm_sec);
144		else
145			hours_buf[0] = '\0';
146
147	printf(" %2d:%02d%cm  up %9.9s%9.9s load average: %.2f %.2f %.2f\n",
148		(host_time.tm_hour % 12) ? host_time.tm_hour % 12 : 12,
149		host_time.tm_min,
150		(host_time.tm_hour >= 12) ? 'p' : 'a',
151		days_buf,
152		hours_buf,
153		(double)host_stat->avenrun[0]/FSCALE,
154		(double)host_stat->avenrun[1]/FSCALE,
155		(double)host_stat->avenrun[2]/FSCALE);
156
157	remember_host(raddrp->sin_addr);
158	return(0);
159}
160
161static int
162onehost(char *host)
163{
164	CLIENT *rstat_clnt;
165	statstime host_stat;
166	struct sockaddr_in addr;
167	struct hostent *hp;
168	struct timeval tv;
169
170	hp = gethostbyname(host);
171	if (hp == NULL) {
172		warnx("unknown host \"%s\"", host);
173		return(-1);
174	}
175
176	rstat_clnt = clnt_create(host, RSTATPROG, RSTATVERS_TIME, "udp");
177	if (rstat_clnt == NULL) {
178		warnx("%s %s", host, clnt_spcreateerror(""));
179		return(-1);
180	}
181
182	bzero((char *)&host_stat, sizeof(host_stat));
183	tv.tv_sec = 15;	/* XXX ??? */
184	tv.tv_usec = 0;
185	if (clnt_call(rstat_clnt, RSTATPROC_STATS, xdr_void, NULL, xdr_statstime, &host_stat, tv) != RPC_SUCCESS) {
186		warnx("%s: %s", host, clnt_sperror(rstat_clnt, host));
187		clnt_destroy(rstat_clnt);
188		return(-1);
189	}
190
191	addr.sin_addr.s_addr = *(int *)hp->h_addr;
192	rstat_reply((caddr_t)&host_stat, &addr);
193	clnt_destroy(rstat_clnt);
194	return (0);
195}
196
197static void
198allhosts(void)
199{
200	statstime host_stat;
201	enum clnt_stat clnt_stat;
202
203	clnt_stat = clnt_broadcast(RSTATPROG, RSTATVERS_TIME, RSTATPROC_STATS,
204				   xdr_void, NULL,
205				   xdr_statstime, &host_stat, rstat_reply);
206	if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
207		errx(1, "%s", clnt_sperrno(clnt_stat));
208}
209
210static void
211usage(void)
212{
213	fprintf(stderr, "usage: rup [hosts ...]\n");
214	exit(1);
215}
216
217int
218main(int argc, char *argv[])
219{
220	int ch;
221
222	while ((ch = getopt(argc, argv, "?")) != -1)
223		switch (ch) {
224		default:
225			usage();
226			/*NOTREACHED*/
227		}
228
229	setlinebuf(stdout);
230	if (argc == optind)
231		allhosts();
232	else {
233		for (; optind < argc; optind++)
234			(void) onehost(argv[optind]);
235	}
236	exit(0);
237}
238