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Allow LinuxKPI character devices to receive mmap() calls from the Linux
[FreeBSD/FreeBSD.git] / usr.bin / rup / rup.c
1 /*-
2  * SPDX-License-Identifier: BSD-4-Clause
3  *
4  * Copyright (c) 1993, John Brezak
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  *      This product includes software developed by the University of
18  *      California, Berkeley and its contributors.
19  * 4. Neither the name of the University nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35
36 #include <sys/cdefs.h>
37
38 __FBSDID("$FreeBSD$");
39
40 #include <sys/param.h>
41 #include <sys/socket.h>
42
43 #include <rpc/rpc.h>
44 #include <rpc/pmap_clnt.h>
45
46 #undef FSHIFT                   /* Use protocol's shift and scale values */
47 #undef FSCALE
48
49 #include <rpcsvc/rstat.h>
50
51 #include <arpa/inet.h>
52
53 #include <err.h>
54 #include <netdb.h>
55 #include <stdio.h>
56 #include <string.h>
57 #include <stdlib.h>
58 #include <time.h>
59 #include <unistd.h>
60
61 #define HOST_WIDTH 15
62
63 struct host_list {
64         struct host_list *next;
65         struct in_addr addr;
66 } *hosts;
67
68 static int
69 search_host(struct in_addr addr)
70 {
71         struct host_list *hp;
72
73         if (!hosts)
74                 return(0);
75
76         for (hp = hosts; hp != NULL; hp = hp->next) {
77                 if (hp->addr.s_addr == addr.s_addr)
78                         return(1);
79         }
80         return(0);
81 }
82
83 static void
84 remember_host(struct in_addr addr)
85 {
86         struct host_list *hp;
87
88         if (!(hp = (struct host_list *)malloc(sizeof(struct host_list))))
89                 errx(1, "no memory");
90         hp->addr.s_addr = addr.s_addr;
91         hp->next = hosts;
92         hosts = hp;
93 }
94
95 static bool_t
96 rstat_reply(caddr_t replyp, struct sockaddr_in *raddrp)
97 {
98         struct tm *tmp_time;
99         struct tm host_time;
100         struct tm host_uptime;
101         char days_buf[16];
102         char hours_buf[16];
103         struct hostent *hp;
104         char *host;
105         statstime *host_stat = (statstime *)replyp;
106         time_t tmp_time_t;
107
108         if (search_host(raddrp->sin_addr))
109                 return(0);
110
111         hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
112                            sizeof(struct in_addr), AF_INET);
113         if (hp)
114                 host = hp->h_name;
115         else
116                 host = inet_ntoa(raddrp->sin_addr);
117
118         /* truncate hostname to fit nicely into field */
119         if (strlen(host) > HOST_WIDTH)
120                 host[HOST_WIDTH] = '\0';
121
122         printf("%-*s\t", HOST_WIDTH, host);
123
124         if (sizeof(time_t) == sizeof(host_stat->curtime.tv_sec)) {
125                 tmp_time = localtime((time_t *)&host_stat->curtime.tv_sec);
126                 host_time = *tmp_time;
127
128                 host_stat->curtime.tv_sec -= host_stat->boottime.tv_sec;
129
130                 tmp_time = gmtime((time_t *)&host_stat->curtime.tv_sec);
131                 host_uptime = *tmp_time;
132         }
133         else {                  /* non-32-bit time_t */
134                 tmp_time_t = host_stat->curtime.tv_sec;
135                 tmp_time = localtime(&tmp_time_t);
136                 host_time = *tmp_time;
137
138                 host_stat->curtime.tv_sec -= host_stat->boottime.tv_sec;
139
140                 tmp_time_t = host_stat->curtime.tv_sec;
141                 tmp_time = gmtime(&tmp_time_t);
142                 host_uptime = *tmp_time;
143         }
144
145         #define updays (host_stat->curtime.tv_sec  / 86400)
146         if (host_uptime.tm_yday != 0)
147                 sprintf(days_buf, "%3d day%s, ", updays,
148                         (updays > 1) ? "s" : "");
149         else
150                 days_buf[0] = '\0';
151
152         if (host_uptime.tm_hour != 0)
153                 sprintf(hours_buf, "%2d:%02d, ",
154                         host_uptime.tm_hour, host_uptime.tm_min);
155         else
156                 if (host_uptime.tm_min != 0)
157                         sprintf(hours_buf, "%2d mins, ", host_uptime.tm_min);
158                 else if (host_stat->curtime.tv_sec < 60)
159                         sprintf(hours_buf, "%2d secs, ", host_uptime.tm_sec);
160                 else
161                         hours_buf[0] = '\0';
162
163         printf(" %2d:%02d%cm  up %9.9s%9.9s load average: %.2f %.2f %.2f\n",
164                 (host_time.tm_hour % 12) ? host_time.tm_hour % 12 : 12,
165                 host_time.tm_min,
166                 (host_time.tm_hour >= 12) ? 'p' : 'a',
167                 days_buf,
168                 hours_buf,
169                 (double)host_stat->avenrun[0]/FSCALE,
170                 (double)host_stat->avenrun[1]/FSCALE,
171                 (double)host_stat->avenrun[2]/FSCALE);
172
173         remember_host(raddrp->sin_addr);
174         return(0);
175 }
176
177 static int
178 onehost(char *host)
179 {
180         CLIENT *rstat_clnt;
181         statstime host_stat;
182         struct sockaddr_in addr;
183         struct hostent *hp;
184         struct timeval tv;
185
186         hp = gethostbyname(host);
187         if (hp == NULL) {
188                 warnx("unknown host \"%s\"", host);
189                 return(-1);
190         }
191
192         rstat_clnt = clnt_create(host, RSTATPROG, RSTATVERS_TIME, "udp");
193         if (rstat_clnt == NULL) {
194                 warnx("%s %s", host, clnt_spcreateerror(""));
195                 return(-1);
196         }
197
198         bzero((char *)&host_stat, sizeof(host_stat));
199         tv.tv_sec = 15; /* XXX ??? */
200         tv.tv_usec = 0;
201         if (clnt_call(rstat_clnt, RSTATPROC_STATS,
202             (xdrproc_t)xdr_void, NULL,
203             (xdrproc_t)xdr_statstime, &host_stat, tv) != RPC_SUCCESS) {
204                 warnx("%s: %s", host, clnt_sperror(rstat_clnt, host));
205                 clnt_destroy(rstat_clnt);
206                 return(-1);
207         }
208
209         addr.sin_addr.s_addr = *(int *)hp->h_addr;
210         rstat_reply((caddr_t)&host_stat, &addr);
211         clnt_destroy(rstat_clnt);
212         return (0);
213 }
214
215 static void
216 allhosts(void)
217 {
218         statstime host_stat;
219         enum clnt_stat clnt_stat;
220
221         clnt_stat = clnt_broadcast(RSTATPROG, RSTATVERS_TIME, RSTATPROC_STATS,
222                                    (xdrproc_t)xdr_void, NULL,
223                                    (xdrproc_t)xdr_statstime, &host_stat,
224                                    (resultproc_t)rstat_reply);
225         if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
226                 errx(1, "%s", clnt_sperrno(clnt_stat));
227 }
228
229 static void
230 usage(void)
231 {
232         fprintf(stderr, "usage: rup [host ...]\n");
233         exit(1);
234 }
235
236 int
237 main(int argc, char *argv[])
238 {
239         int ch;
240
241         while ((ch = getopt(argc, argv, "?")) != -1)
242                 switch (ch) {
243                 default:
244                         usage();
245                         /*NOTREACHED*/
246                 }
247
248         setlinebuf(stdout);
249         if (argc == optind)
250                 allhosts();
251         else {
252                 for (; optind < argc; optind++)
253                         (void) onehost(argv[optind]);
254         }
255         exit(0);
256 }