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. 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/rusers/rusers.c,v 1.17 2005/05/21 09:55:08 ru Exp $
  34  * $DragonFly: src/usr.bin/rusers/rusers.c,v 1.4 2008/10/16 01:52:33 swildner Exp $
  35  */
  36
  37 #include <sys/types.h>
  38 #include <sys/socket.h>
  39
  40 #include <rpc/rpc.h>
  41 #include <rpc/pmap_clnt.h>
  42 #include <rpcsvc/rnusers.h>
  43
  44 #include <arpa/inet.h>
  45
  46 #include <err.h>
  47 #include <netdb.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <unistd.h>
  52
  53 #define MAX_INT         0x7fffffff
  54 #define HOST_WIDTH      20
  55 #define LINE_WIDTH      15
  56
  57 int longopt;
  58 int allopt;
  59
  60 struct host_list {
  61         struct  host_list *next;
  62         struct  in_addr addr;
  63 } *hosts;
  64
  65 static int
  66 search_host(struct in_addr addr)
  67 {
  68         struct host_list *hp;
  69
  70         if (hosts == NULL)
  71                 return (0);
  72
  73         for (hp = hosts; hp != NULL; hp = hp->next) {
  74                 if (hp->addr.s_addr == addr.s_addr)
  75                         return (1);
  76         }
  77         return (0);
  78 }
  79
  80 static void
  81 remember_host(struct in_addr addr)
  82 {
  83         struct host_list *hp;
  84
  85         if ((hp = (struct host_list *)malloc(sizeof(struct host_list))) == NULL)
  86                 errx(1, "no memory");
  87         hp->addr.s_addr = addr.s_addr;
  88         hp->next = hosts;
  89         hosts = hp;
  90 }
  91
  92 static int
  93 rusers_reply(caddr_t replyp, struct sockaddr_in *raddrp)
  94 {
  95         u_int x;
  96         int idle;
  97         char date[32], idle_time[64], remote[64];
  98         struct hostent *hp;
  99         utmpidlearr *up, u;
 100         char *host;
 101         int days, hours, minutes, seconds;
 102
 103         up = &u;
 104         memcpy(up, replyp, sizeof(*up));
 105         if (search_host(raddrp->sin_addr))
 106                 return (0);
 107
 108         if (!allopt && up->utmpidlearr_len == 0)
 109                 return (0);
 110
 111         hp = gethostbyaddr(&raddrp->sin_addr.s_addr, sizeof(struct in_addr),
 112             AF_INET);
 113         if (hp != NULL)
 114                 host = hp->h_name;
 115         else
 116                 host = inet_ntoa(raddrp->sin_addr);
 117
 118         if (!longopt)
 119                 printf("%-*s ", HOST_WIDTH, host);
 120
 121         for (x = 0; x < up->utmpidlearr_len; x++) {
 122                 strncpy(date,
 123                 &(ctime((time_t *)&(up->utmpidlearr_val[x].ui_utmp.ut_time))[4]),
 124                     sizeof(date) - 1);
 125
 126                 idle = up->utmpidlearr_val[x].ui_idle;
 127                 sprintf(idle_time, "  :%02d", idle);
 128                 if (idle == MAX_INT)
 129                         strcpy(idle_time, "??");
 130                 else if (idle == 0)
 131                         strcpy(idle_time, "");
 132                 else {
 133                         seconds = idle;
 134                         days = seconds / (60 * 60 * 24);
 135                         seconds %= (60 * 60 * 24);
 136                         hours = seconds / (60 * 60);
 137                         seconds %= (60 * 60);
 138                         minutes = seconds / 60;
 139                         seconds %= 60;
 140                         if (idle > 60)
 141                                 sprintf(idle_time, "%d:%02d", minutes, seconds);
 142                         if (idle >= (60 * 60))
 143                                 sprintf(idle_time, "%d:%02d:%02d",
 144                                     hours, minutes, seconds);
 145                         if (idle >= (24 * 60 * 60))
 146                                 sprintf(idle_time, "%d days, %d:%02d:%02d",
 147                                     days, hours, minutes, seconds);
 148                 }
 149
 150                 strncpy(remote, up->utmpidlearr_val[x].ui_utmp.ut_host,
 151                     sizeof(remote) - 1);
 152                 if (strlen(remote) != 0)
 153                         sprintf(remote, "(%.16s)",
 154                             up->utmpidlearr_val[x].ui_utmp.ut_host);
 155
 156                 if (longopt)
 157                         printf("%-8.8s %*s:%-*.*s %-12.12s  %6s %.18s\n",
 158                             up->utmpidlearr_val[x].ui_utmp.ut_name,
 159                             HOST_WIDTH, host, LINE_WIDTH, LINE_WIDTH,
 160                             up->utmpidlearr_val[x].ui_utmp.ut_line, date,
 161                             idle_time, remote );
 162                 else
 163                         printf("%s ",
 164                             up->utmpidlearr_val[x].ui_utmp.ut_name);
 165         }
 166         if (!longopt)
 167                 putchar('\n');
 168
 169         remember_host(raddrp->sin_addr);
 170         return (0);
 171 }
 172
 173 static void
 174 onehost(char *host)
 175 {
 176         utmpidlearr up;
 177         CLIENT *rusers_clnt;
 178         struct sockaddr_in addr;
 179         struct hostent *hp;
 180         struct timeval tv;
 181
 182         hp = gethostbyname(host);
 183         if (hp == NULL)
 184                 errx(1, "unknown host \"%s\"", host);
 185
 186         rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
 187         if (rusers_clnt == NULL)
 188                 errx(1, "%s", clnt_spcreateerror(""));
 189
 190         bzero((char *)&up, sizeof(up));
 191         tv.tv_sec = 15; /* XXX ?? */
 192         tv.tv_usec = 0;
 193         if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL,
 194             (xdrproc_t)xdr_utmpidlearr, &up, tv) != RPC_SUCCESS)
 195                 errx(1, "%s", clnt_sperror(rusers_clnt, ""));
 196         memcpy(&addr.sin_addr.s_addr, hp->h_addr, sizeof(addr.sin_addr.s_addr));
 197         rusers_reply((caddr_t)&up, &addr);
 198         clnt_destroy(rusers_clnt);
 199 }
 200
 201 static void
 202 allhosts(void)
 203 {
 204         utmpidlearr up;
 205         enum clnt_stat clnt_stat;
 206
 207         bzero((char *)&up, sizeof(up));
 208         clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
 209             RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL,
 210             (xdrproc_t)xdr_utmpidlearr, (char *)&up,
 211             (resultproc_t)rusers_reply);
 212         if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
 213                 errx(1, "%s", clnt_sperrno(clnt_stat));
 214 }
 215
 216 static void
 217 usage(void)
 218 {
 219
 220         fprintf(stderr, "usage: rusers [-al] [host ...]\n");
 221         exit(1);
 222 }
 223
 224 int
 225 main(int argc, char *argv[])
 226 {
 227         int ch;
 228
 229         while ((ch = getopt(argc, argv, "al")) != -1)
 230                 switch (ch) {
 231                 case 'a':
 232                         allopt++;
 233                         break;
 234                 case 'l':
 235                         longopt++;
 236                         break;
 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                         onehost(argv[optind]);
 248         }
 249         exit(0);
 250 }