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
34 #include <sys/cdefs.h>
35
36 __FBSDID("$FreeBSD$");
37
38 #include <sys/types.h>
39 #include <sys/socket.h>
40
41 #include <rpc/rpc.h>
42 #include <rpc/pmap_clnt.h>
43 #include <rpcsvc/rnusers.h>
44
45 #include <arpa/inet.h>
46
47 #include <err.h>
48 #include <netdb.h>
49 #include <stdio.h>
50 #include <stdlib.h>
51 #include <string.h>
52 #include <timeconv.h>
53 #include <unistd.h>
54
55 #define MAX_INT 0x7fffffff
56 #define HOST_WIDTH 20
57 #define LINE_WIDTH 15
58
59 static int longopt;
60 static int allopt;
61
62 static struct host_list {
63 struct host_list *next;
64 struct in_addr addr;
65 } *hosts;
66
67 static int
search_host(struct in_addr addr)68 search_host(struct in_addr addr)
69 {
70 struct host_list *hp;
71
72 if (hosts == NULL)
73 return (0);
74
75 for (hp = hosts; hp != NULL; hp = hp->next) {
76 if (hp->addr.s_addr == addr.s_addr)
77 return (1);
78 }
79 return (0);
80 }
81
82 static void
remember_host(struct in_addr addr)83 remember_host(struct in_addr addr)
84 {
85 struct host_list *hp;
86
87 if ((hp = (struct host_list *)malloc(sizeof(struct host_list))) == NULL)
88 errx(1, "no memory");
89 hp->addr.s_addr = addr.s_addr;
90 hp->next = hosts;
91 hosts = hp;
92 }
93
94 static int
rusers_reply(caddr_t replyp,struct sockaddr_in * raddrp)95 rusers_reply(caddr_t replyp, struct sockaddr_in *raddrp)
96 {
97 u_int x;
98 int idle;
99 char date[32], idle_time[64], remote[64];
100 struct hostent *hp;
101 utmpidlearr *up, u;
102 char *host;
103 int days, hours, minutes, seconds;
104
105 up = &u;
106 memcpy(up, replyp, sizeof(*up));
107 if (search_host(raddrp->sin_addr))
108 return (0);
109
110 if (!allopt && up->utmpidlearr_len == 0)
111 return (0);
112
113 hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
114 sizeof(struct in_addr), AF_INET);
115 if (hp != NULL)
116 host = hp->h_name;
117 else
118 host = inet_ntoa(raddrp->sin_addr);
119
120 if (!longopt)
121 printf("%-*s ", HOST_WIDTH, host);
122
123 for (x = 0; x < up->utmpidlearr_len; x++) {
124 time_t t = _int_to_time(up->utmpidlearr_val[x].ui_utmp.ut_time);
125 strncpy(date, &(ctime(&t)[4]), sizeof(date) - 1);
126
127 idle = up->utmpidlearr_val[x].ui_idle;
128 sprintf(idle_time, " :%02d", idle);
129 if (idle == MAX_INT)
130 strcpy(idle_time, "??");
131 else if (idle == 0)
132 strcpy(idle_time, "");
133 else {
134 seconds = idle;
135 days = seconds / (60 * 60 * 24);
136 seconds %= (60 * 60 * 24);
137 hours = seconds / (60 * 60);
138 seconds %= (60 * 60);
139 minutes = seconds / 60;
140 seconds %= 60;
141 if (idle > 60)
142 sprintf(idle_time, "%d:%02d", minutes, seconds);
143 if (idle >= (60 * 60))
144 sprintf(idle_time, "%d:%02d:%02d",
145 hours, minutes, seconds);
146 if (idle >= (24 * 60 * 60))
147 sprintf(idle_time, "%d days, %d:%02d:%02d",
148 days, hours, minutes, seconds);
149 }
150
151 strncpy(remote, up->utmpidlearr_val[x].ui_utmp.ut_host,
152 sizeof(remote) - 1);
153 if (strlen(remote) != 0)
154 sprintf(remote, "(%.16s)",
155 up->utmpidlearr_val[x].ui_utmp.ut_host);
156
157 if (longopt)
158 printf("%-8.8s %*s:%-*.*s %-12.12s %6s %.18s\n",
159 up->utmpidlearr_val[x].ui_utmp.ut_name,
160 HOST_WIDTH, host, LINE_WIDTH, LINE_WIDTH,
161 up->utmpidlearr_val[x].ui_utmp.ut_line, date,
162 idle_time, remote );
163 else
164 printf("%s ",
165 up->utmpidlearr_val[x].ui_utmp.ut_name);
166 }
167 if (!longopt)
168 putchar('\n');
169
170 remember_host(raddrp->sin_addr);
171 return (0);
172 }
173
174 static void
onehost(char * host)175 onehost(char *host)
176 {
177 utmpidlearr up;
178 CLIENT *rusers_clnt;
179 struct sockaddr_in addr;
180 struct hostent *hp;
181 struct timeval tv;
182
183 hp = gethostbyname(host);
184 if (hp == NULL)
185 errx(1, "unknown host \"%s\"", host);
186
187 rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
188 if (rusers_clnt == NULL)
189 errx(1, "%s", clnt_spcreateerror(""));
190
191 bzero((char *)&up, sizeof(up));
192 tv.tv_sec = 15; /* XXX ?? */
193 tv.tv_usec = 0;
194 if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL,
195 (xdrproc_t)xdr_utmpidlearr, &up, tv) != RPC_SUCCESS)
196 errx(1, "%s", clnt_sperror(rusers_clnt, ""));
197 memcpy(&addr.sin_addr.s_addr, hp->h_addr, sizeof(addr.sin_addr.s_addr));
198 rusers_reply((caddr_t)&up, &addr);
199 clnt_destroy(rusers_clnt);
200 }
201
202 static void
allhosts(void)203 allhosts(void)
204 {
205 utmpidlearr up;
206 enum clnt_stat clnt_stat;
207
208 bzero((char *)&up, sizeof(up));
209 clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
210 RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL,
211 (xdrproc_t)xdr_utmpidlearr, (char *)&up,
212 (resultproc_t)rusers_reply);
213 if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
214 errx(1, "%s", clnt_sperrno(clnt_stat));
215 }
216
217 static void
usage(void)218 usage(void)
219 {
220
221 fprintf(stderr, "usage: rusers [-al] [host ...]\n");
222 exit(1);
223 }
224
225 int
main(int argc,char * argv[])226 main(int argc, char *argv[])
227 {
228 int ch;
229
230 while ((ch = getopt(argc, argv, "al")) != -1)
231 switch (ch) {
232 case 'a':
233 allopt++;
234 break;
235 case 'l':
236 longopt++;
237 break;
238 default:
239 usage();
240 /* NOTREACHED */
241 }
242
243 setlinebuf(stdout);
244 if (argc == optind)
245 allhosts();
246 else {
247 for (; optind < argc; optind++)
248 (void)onehost(argv[optind]);
249 }
250 exit(0);
251 }
252