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 1.8.2.1 2001/07/02 23:43:05 mikeh Exp $
  34  * $DragonFly: src/usr.bin/rusers/rusers.c,v 1.3 2004/07/17 21:10:42 hmp Exp $
  35  */
  36
  37 #include <sys/types.h>
  38 #include <sys/socket.h>
  39 #include <rpc/rpc.h>
  40 #include <rpc/pmap_clnt.h>
  41 #include <rpcsvc/rnusers.h>
  42 #include <arpa/inet.h>
  43 #include <err.h>
  44 #include <netdb.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <strings.h>
  48 #include <unistd.h>
  49
  50 #define MAX_INT         0x7fffffff
  51 #define HOST_WIDTH      20
  52 #define LINE_WIDTH      15
  53
  54 int longopt;
  55 int allopt;
  56
  57 struct host_list {
  58         struct  host_list *next;
  59         struct  in_addr addr;
  60 } *hosts;
  61
  62 int
  63 search_host(struct in_addr addr)
  64 {
  65         struct host_list *hp;
  66
  67         if (hosts == NULL)
  68                 return (0);
  69
  70         for (hp = hosts; hp != NULL; hp = hp->next) {
  71                 if (hp->addr.s_addr == addr.s_addr)
  72                         return (1);
  73         }
  74         return (0);
  75 }
  76
  77 void
  78 remember_host(struct in_addr addr)
  79 {
  80         struct host_list *hp;
  81
  82         if ((hp = (struct host_list *)malloc(sizeof(struct host_list))) == NULL)
  83                 errx(1, "no memory");
  84         hp->addr.s_addr = addr.s_addr;
  85         hp->next = hosts;
  86         hosts = hp;
  87 }
  88
  89 int
  90 rusers_reply(char *replyp, struct sockaddr_in *raddrp)
  91 {
  92         int x, 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         if (search_host(raddrp->sin_addr))
 100                 return (0);
 101
 102         if (!allopt && up->utmpidlearr_len == 0)
 103                 return (0);
 104
 105         hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
 106             sizeof(struct in_addr), AF_INET);
 107         if (hp != NULL)
 108                 host = hp->h_name;
 109         else
 110                 host = inet_ntoa(raddrp->sin_addr);
 111
 112         if (!longopt)
 113                 printf("%-*s ", HOST_WIDTH, host);
 114
 115         for (x = 0; x < up->utmpidlearr_len; x++) {
 116                 strncpy(date,
 117                 &(ctime((time_t *)&(up->utmpidlearr_val[x].ui_utmp.ut_time))[4]),
 118                     sizeof(date) - 1);
 119
 120                 idle = up->utmpidlearr_val[x].ui_idle;
 121                 sprintf(idle_time, "  :%02d", idle);
 122                 if (idle == MAX_INT)
 123                         strcpy(idle_time, "??");
 124                 else if (idle == 0)
 125                         strcpy(idle_time, "");
 126                 else {
 127                         seconds = idle;
 128                         days = seconds / (60 * 60 * 24);
 129                         seconds %= (60 * 60 * 24);
 130                         hours = seconds / (60 * 60);
 131                         seconds %= (60 * 60);
 132                         minutes = seconds / 60;
 133                         seconds %= 60;
 134                         if (idle > 60)
 135                                 sprintf(idle_time, "%d:%02d", minutes, seconds);
 136                         if (idle >= (60 * 60))
 137                                 sprintf(idle_time, "%d:%02d:%02d",
 138                                     hours, minutes, seconds);
 139                         if (idle >= (24 * 60 * 60))
 140                                 sprintf(idle_time, "%d days, %d:%02d:%02d",
 141                                     days, hours, minutes, seconds);
 142                 }
 143
 144                 strncpy(remote, up->utmpidlearr_val[x].ui_utmp.ut_host,
 145                     sizeof(remote) - 1);
 146                 if (strlen(remote) != 0)
 147                         sprintf(remote, "(%.16s)",
 148                             up->utmpidlearr_val[x].ui_utmp.ut_host);
 149
 150                 if (longopt)
 151                         printf("%-8.8s %*s:%-*.*s %-12.12s  %6s %.18s\n",
 152                             up->utmpidlearr_val[x].ui_utmp.ut_name,
 153                             HOST_WIDTH, host, LINE_WIDTH, LINE_WIDTH,
 154                             up->utmpidlearr_val[x].ui_utmp.ut_line, date,
 155                             idle_time, remote );
 156                 else
 157                         printf("%s ",
 158                             up->utmpidlearr_val[x].ui_utmp.ut_name);
 159         }
 160         if (!longopt)
 161                 putchar('\n');
 162
 163         remember_host(raddrp->sin_addr);
 164         return (0);
 165 }
 166
 167 void
 168 onehost(char *host)
 169 {
 170         utmpidlearr up;
 171         CLIENT *rusers_clnt;
 172         struct sockaddr_in addr;
 173         struct hostent *hp;
 174         struct timeval tv;
 175
 176         hp = gethostbyname(host);
 177         if (hp == NULL)
 178                 errx(1, "unknown host \"%s\"", host);
 179
 180         rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
 181         if (rusers_clnt == NULL)
 182                 errx(1, "%s", clnt_spcreateerror(""));
 183
 184         bzero((char *)&up, sizeof(up));
 185         tv.tv_sec = 15; /* XXX ?? */
 186         tv.tv_usec = 0;
 187         if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL,
 188             xdr_utmpidlearr, &up, tv) != RPC_SUCCESS)
 189                 errx(1, "%s", clnt_sperror(rusers_clnt, ""));
 190         memcpy(&addr.sin_addr.s_addr, hp->h_addr, sizeof(addr.sin_addr.s_addr));
 191         rusers_reply((char *)&up, &addr);
 192         clnt_destroy(rusers_clnt);
 193 }
 194
 195 void
 196 allhosts()
 197 {
 198         utmpidlearr up;
 199         enum clnt_stat clnt_stat;
 200
 201         bzero((char *)&up, sizeof(up));
 202         clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
 203             RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr, (char *)&up,
 204             rusers_reply);
 205         if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
 206                 errx(1, "%s", clnt_sperrno(clnt_stat));
 207 }
 208
 209 static void
 210 usage()
 211 {
 212
 213         fprintf(stderr, "usage: rusers [-la] [hosts ...]\n");
 214         exit(1);
 215 }
 216
 217 int
 218 main(int argc, char *argv[])
 219 {
 220         int ch;
 221
 222         while ((ch = getopt(argc, argv, "al")) != -1)
 223                 switch (ch) {
 224                 case 'a':
 225                         allopt++;
 226                         break;
 227                 case 'l':
 228                         longopt++;
 229                         break;
 230                 default:
 231                         usage();
 232                         /* NOTREACHED */
 233                 }
 234
 235         setlinebuf(stdout);
 236         if (argc == optind)
 237                 allhosts();
 238         else {
 239                 for (; optind < argc; optind++)
 240                         (void)onehost(argv[optind]);
 241         }
 242         exit(0);
 243 }