usr.bin/rusers/rusers.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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/usr.bin/rusers/rusers.c,v 1.17 2005/05/21 09:55:08 ru Exp $
  30  * $DragonFly: src/usr.bin/rusers/rusers.c,v 1.4 2008/10/16 01:52:33 swildner Exp $
  31  */
  32
  33 #include <sys/types.h>
  34 #include <sys/socket.h>
  35
  36 #include <rpc/rpc.h>
  37 #include <rpc/pmap_clnt.h>
  38 #include <rpcsvc/rnusers.h>
  39
  40 #include <arpa/inet.h>
  41
  42 #include <err.h>
  43 #include <netdb.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <unistd.h>
  48
  49 #define MAX_INT         0x7fffffff
  50 #define HOST_WIDTH      20
  51 #define LINE_WIDTH      15
  52
  53 int longopt;
  54 int allopt;
  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 = (struct host_list *)malloc(sizeof(struct host_list))) == NULL)
  82                 errx(1, "no memory");
  83         hp->addr.s_addr = addr.s_addr;
  84         hp->next = hosts;
  85         hosts = hp;
  86 }
  87
  88 static int
  89 rusers_reply(caddr_t replyp, struct sockaddr_in *raddrp)
  90 {
  91         u_int x;
  92         int idle;
  93         char date[32], idle_time[64], remote[64];
  94         struct hostent *hp;
  95         utmpidlearr *up, u;
  96         char *host;
  97         int days, hours, minutes, seconds;
  98
  99         up = &u;
 100         memcpy(up, replyp, sizeof(*up));
 101         if (search_host(raddrp->sin_addr))
 102                 return (0);
 103
 104         if (!allopt && up->utmpidlearr_len == 0)
 105                 return (0);
 106
 107         hp = gethostbyaddr(&raddrp->sin_addr.s_addr, sizeof(struct in_addr),
 108             AF_INET);
 109         if (hp != NULL)
 110                 host = hp->h_name;
 111         else
 112                 host = inet_ntoa(raddrp->sin_addr);
 113
 114         if (!longopt)
 115                 printf("%-*s ", HOST_WIDTH, host);
 116
 117         for (x = 0; x < up->utmpidlearr_len; x++) {
 118                 strncpy(date,
 119                 &(ctime((time_t *)&(up->utmpidlearr_val[x].ui_utmp.ut_time))[4]),
 120                     sizeof(date) - 1);
 121
 122                 idle = up->utmpidlearr_val[x].ui_idle;
 123                 sprintf(idle_time, "  :%02d", idle);
 124                 if (idle == MAX_INT)
 125                         strcpy(idle_time, "??");
 126                 else if (idle == 0)
 127                         strcpy(idle_time, "");
 128                 else {
 129                         seconds = idle;
 130                         days = seconds / (60 * 60 * 24);
 131                         seconds %= (60 * 60 * 24);
 132                         hours = seconds / (60 * 60);
 133                         seconds %= (60 * 60);
 134                         minutes = seconds / 60;
 135                         seconds %= 60;
 136                         if (idle > 60)
 137                                 sprintf(idle_time, "%d:%02d", minutes, seconds);
 138                         if (idle >= (60 * 60))
 139                                 sprintf(idle_time, "%d:%02d:%02d",
 140                                     hours, minutes, seconds);
 141                         if (idle >= (24 * 60 * 60))
 142                                 sprintf(idle_time, "%d days, %d:%02d:%02d",
 143                                     days, hours, minutes, seconds);
 144                 }
 145
 146                 strncpy(remote, up->utmpidlearr_val[x].ui_utmp.ut_host,
 147                     sizeof(remote) - 1);
 148                 if (strlen(remote) != 0)
 149                         sprintf(remote, "(%.16s)",
 150                             up->utmpidlearr_val[x].ui_utmp.ut_host);
 151
 152                 if (longopt)
 153                         printf("%-8.8s %*s:%-*.*s %-12.12s  %6s %.18s\n",
 154                             up->utmpidlearr_val[x].ui_utmp.ut_name,
 155                             HOST_WIDTH, host, LINE_WIDTH, LINE_WIDTH,
 156                             up->utmpidlearr_val[x].ui_utmp.ut_line, date,
 157                             idle_time, remote );
 158                 else
 159                         printf("%s ",
 160                             up->utmpidlearr_val[x].ui_utmp.ut_name);
 161         }
 162         if (!longopt)
 163                 putchar('\n');
 164
 165         remember_host(raddrp->sin_addr);
 166         return (0);
 167 }
 168
 169 static void
 170 onehost(char *host)
 171 {
 172         utmpidlearr up;
 173         CLIENT *rusers_clnt;
 174         struct sockaddr_in addr;
 175         struct hostent *hp;
 176         struct timeval tv;
 177
 178         hp = gethostbyname(host);
 179         if (hp == NULL)
 180                 errx(1, "unknown host \"%s\"", host);
 181
 182         rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
 183         if (rusers_clnt == NULL)
 184                 errx(1, "%s", clnt_spcreateerror(""));
 185
 186         bzero((char *)&up, sizeof(up));
 187         tv.tv_sec = 15; /* XXX ?? */
 188         tv.tv_usec = 0;
 189         if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL,
 190             (xdrproc_t)xdr_utmpidlearr, &up, tv) != RPC_SUCCESS)
 191                 errx(1, "%s", clnt_sperror(rusers_clnt, ""));
 192         memcpy(&addr.sin_addr.s_addr, hp->h_addr, sizeof(addr.sin_addr.s_addr));
 193         rusers_reply((caddr_t)&up, &addr);
 194         clnt_destroy(rusers_clnt);
 195 }
 196
 197 static void
 198 allhosts(void)
 199 {
 200         utmpidlearr up;
 201         enum clnt_stat clnt_stat;
 202
 203         bzero((char *)&up, sizeof(up));
 204         clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
 205             RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL,
 206             (xdrproc_t)xdr_utmpidlearr, (char *)&up,
 207             (resultproc_t)rusers_reply);
 208         if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
 209                 errx(1, "%s", clnt_sperrno(clnt_stat));
 210 }
 211
 212 static void
 213 usage(void)
 214 {
 215
 216         fprintf(stderr, "usage: rusers [-al] [host ...]\n");
 217         exit(1);
 218 }
 219
 220 int
 221 main(int argc, char *argv[])
 222 {
 223         int ch;
 224
 225         while ((ch = getopt(argc, argv, "al")) != -1)
 226                 switch (ch) {
 227                 case 'a':
 228                         allopt++;
 229                         break;
 230                 case 'l':
 231                         longopt++;
 232                         break;
 233                 default:
 234                         usage();
 235                         /* NOTREACHED */
 236                 }
 237
 238         setlinebuf(stdout);
 239         if (argc == optind)
 240                 allhosts();
 241         else {
 242                 for (; optind < argc; optind++)
 243                         onehost(argv[optind]);
 244         }
 245         exit(0);
 246 }