usr.bin/rup/rup.c

   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  * $FreeBSD: src/usr.bin/rup/rup.c,v 1.19 2005/12/04 18:25:26 philip Exp $
  34  * $DragonFly: src/usr.bin/rup/rup.c,v 1.5 2005/08/04 18:21:25 liamfoy Exp $
  35  */
  36 #include <sys/param.h>
  37 #include <sys/socket.h>
  38
  39 #include <arpa/inet.h>
  40 #include <rpc/rpc.h>
  41 #include <rpc/pmap_clnt.h>
  42 #undef FSHIFT                   /* Use protocol's shift and scale values */
  43 #undef FSCALE
  44 #include <rpcsvc/rstat.h>
  45
  46 #include <err.h>
  47 #include <netdb.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <time.h>
  52 #include <unistd.h>
  53
  54 #define HOST_WIDTH 15
  55
  56 struct host_list {
  57         struct host_list *next;
  58         struct in_addr addr;
  59 } *hosts;
  60
  61 static int
  62 search_host(struct in_addr addr)
  63 {
  64         struct host_list *hp;
  65
  66         if (hosts == NULL)
  67                 return(0);
  68
  69         for (hp = hosts; hp != NULL; hp = hp->next) {
  70                 if (hp->addr.s_addr == addr.s_addr)
  71                         return(1);
  72         }
  73         return(0);
  74 }
  75
  76 static void
  77 remember_host(struct in_addr addr)
  78 {
  79         struct host_list *hp;
  80
  81         if ((hp = malloc(sizeof(struct host_list))) == NULL)
  82                 err(1, "malloc failed");
  83         hp->addr.s_addr = addr.s_addr;
  84         hp->next = hosts;
  85         hosts = hp;
  86 }
  87
  88 static bool_t
  89 rstat_reply(caddr_t replyp, struct sockaddr_in *raddrp)
  90 {
  91         struct tm *tmp_time;
  92         struct tm host_time;
  93         struct tm host_uptime;
  94         char days_buf[16];
  95         char hours_buf[16];
  96         struct hostent *hp;
  97         char *host;
  98         statstime *host_stat = (statstime *)replyp;
  99         time_t tmp_time_t;
 100
 101         if (search_host(raddrp->sin_addr))
 102                 return(0);
 103
 104         hp = gethostbyaddr(&raddrp->sin_addr.s_addr, sizeof(struct in_addr),
 105                            AF_INET);
 106         if (hp)
 107                 host = hp->h_name;
 108         else
 109                 host = inet_ntoa(raddrp->sin_addr);
 110
 111         /* truncate hostname to fit nicely into field */
 112         if (strlen(host) > HOST_WIDTH)
 113                 host[HOST_WIDTH] = '\0';
 114
 115         printf("%-*s\t", HOST_WIDTH, host);
 116
 117         if (sizeof(time_t) == sizeof(host_stat->curtime.tv_sec)) {
 118                 tmp_time = localtime((time_t *)&host_stat->curtime.tv_sec);
 119                 host_time = *tmp_time;
 120
 121                 host_stat->curtime.tv_sec -= host_stat->boottime.tv_sec;
 122
 123                 tmp_time = gmtime((time_t *)&host_stat->curtime.tv_sec);
 124                 host_uptime = *tmp_time;
 125         }
 126         else {                  /* non-32-bit time_t */
 127                 tmp_time_t = host_stat->curtime.tv_sec;
 128                 tmp_time = localtime(&tmp_time_t);
 129                 host_time = *tmp_time;
 130
 131                 host_stat->curtime.tv_sec -= host_stat->boottime.tv_sec;
 132
 133                 tmp_time_t = host_stat->curtime.tv_sec;
 134                 tmp_time = gmtime(&tmp_time_t);
 135                 host_uptime = *tmp_time;
 136         }
 137
 138         #define updays (host_stat->curtime.tv_sec  / 86400)
 139         if (host_uptime.tm_yday != 0)
 140                 snprintf(days_buf, sizeof days_buf, "%3d day%s, ", updays,
 141                         (updays > 1) ? "s" : "");
 142         else
 143                 days_buf[0] = '\0';
 144
 145         if (host_uptime.tm_hour != 0)
 146                 snprintf(hours_buf, sizeof hours_buf, "%2d:%02d, ",
 147                         host_uptime.tm_hour, host_uptime.tm_min);
 148         else if (host_uptime.tm_min != 0)
 149                 snprintf(hours_buf, sizeof hours_buf, "%2d mins, ",
 150                          host_uptime.tm_min);
 151         else if (host_stat->curtime.tv_sec < 60)
 152                 snprintf(hours_buf, sizeof hours_buf, "%2d secs, ",
 153                          host_uptime.tm_sec);
 154         else
 155                 hours_buf[0] = '\0';
 156
 157         printf(" %2d:%02d%cm  up %9.9s%9.9s load average: %.2f %.2f %.2f\n",
 158                 (host_time.tm_hour % 12) ? host_time.tm_hour % 12 : 12,
 159                 host_time.tm_min,
 160                 (host_time.tm_hour >= 12) ? 'p' : 'a',
 161                 days_buf,
 162                 hours_buf,
 163                 (double)host_stat->avenrun[0]/FSCALE,
 164                 (double)host_stat->avenrun[1]/FSCALE,
 165                 (double)host_stat->avenrun[2]/FSCALE);
 166
 167         remember_host(raddrp->sin_addr);
 168         return(0);
 169 }
 170
 171 static int
 172 onehost(const char *host)
 173 {
 174         CLIENT *rstat_clnt;
 175         statstime host_stat;
 176         struct sockaddr_in addr;
 177         struct hostent *hp;
 178         struct timeval tv;
 179
 180         hp = gethostbyname(host);
 181         if (hp == NULL) {
 182                 herror("rup");
 183                 return(1);
 184         }
 185
 186         rstat_clnt = clnt_create(host, RSTATPROG, RSTATVERS_TIME, "udp");
 187         if (rstat_clnt == NULL) {
 188                 clnt_pcreateerror(host);
 189                 return(1);
 190         }
 191
 192         bzero(&host_stat, sizeof(host_stat));
 193         tv.tv_sec = 15; /* XXX ??? */
 194         tv.tv_usec = 0;
 195         if (clnt_call(rstat_clnt, RSTATPROC_STATS, (xdrproc_t)xdr_void, NULL,
 196             (xdrproc_t)xdr_statstime, &host_stat, tv) != RPC_SUCCESS) {
 197                 clnt_perror(rstat_clnt, host);
 198                 clnt_destroy(rstat_clnt);
 199                 return(1);
 200         }
 201
 202         addr.sin_addr.s_addr = *(int *)hp->h_addr;
 203         rstat_reply((caddr_t)&host_stat, &addr);
 204         clnt_destroy(rstat_clnt);
 205         return (0);
 206 }
 207
 208 static void
 209 allhosts(void)
 210 {
 211         statstime host_stat;
 212         enum clnt_stat clnt_stat;
 213
 214         clnt_stat = clnt_broadcast(RSTATPROG, RSTATVERS_TIME, RSTATPROC_STATS,
 215                                    (xdrproc_t)xdr_void, NULL,
 216                                    (xdrproc_t)xdr_statstime, &host_stat,
 217                                    (resultproc_t)rstat_reply);
 218         if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
 219                 errx(1, "%s", clnt_sperrno(clnt_stat));
 220 }
 221
 222 static void
 223 usage(void)
 224 {
 225         fprintf(stderr, "usage: rup [host ...]\n");
 226         exit(1);
 227 }
 228
 229 int
 230 main(int argc, char *argv[])
 231 {
 232         int ch, retval;
 233
 234         retval = 0;
 235         while ((ch = getopt(argc, argv, "")) != -1)
 236                 switch (ch) {
 237                 default:
 238                         usage();
 239                         /*NOTREACHED*/
 240                 }
 241
 242         setlinebuf(stdout);
 243         if (argc == optind)
 244                 allhosts();
 245         else {
 246                 for (; optind < argc; optind++)
 247                         retval += onehost(argv[optind]);
 248         }
 249         exit(retval ? 1 : 0);
 250 }