1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1993, John Brezak
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
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 <timeconv.h>
52 #include <unistd.h>
53
54 #define MAX_INT 0x7fffffff
55 #define HOST_WIDTH 20
56 #define LINE_WIDTH 15
57
58 static int longopt;
59 static int allopt;
60
61 static struct host_list {
62 struct host_list *next;
63 struct in_addr addr;
64 } *hosts;
65
66 static int
search_host(struct in_addr addr)67 search_host(struct in_addr addr)
68 {
69 struct host_list *hp;
70
71 if (hosts == NULL)
72 return (0);
73
74 for (hp = hosts; hp != NULL; hp = hp->next) {
75 if (hp->addr.s_addr == addr.s_addr)
76 return (1);
77 }
78 return (0);
79 }
80
81 static void
remember_host(struct in_addr addr)82 remember_host(struct in_addr addr)
83 {
84 struct host_list *hp;
85
86 if ((hp = (struct host_list *)malloc(sizeof(struct host_list))) == NULL)
87 errx(1, "no memory");
88 hp->addr.s_addr = addr.s_addr;
89 hp->next = hosts;
90 hosts = hp;
91 }
92
93 static int
rusers_reply(void * replyp,struct sockaddr_in * raddrp)94 rusers_reply(void *replyp, struct sockaddr_in *raddrp)
95 {
96 unsigned int x;
97 int idle;
98 char date[32], idle_time[64], remote[64];
99 struct hostent *hp;
100 utmpidlearr *up, u;
101 char *host;
102 int days, hours, minutes, seconds;
103
104 up = &u;
105 memcpy(up, replyp, sizeof(*up));
106 if (search_host(raddrp->sin_addr))
107 return (0);
108
109 if (!allopt && up->utmpidlearr_len == 0)
110 return (0);
111
112 hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
113 sizeof(struct in_addr), AF_INET);
114 if (hp != NULL)
115 host = hp->h_name;
116 else
117 host = inet_ntoa(raddrp->sin_addr);
118
119 if (!longopt)
120 printf("%-*s ", HOST_WIDTH, host);
121
122 for (x = 0; x < up->utmpidlearr_len; x++) {
123 time_t t = _int_to_time(up->utmpidlearr_val[x].ui_utmp.ut_time);
124 strncpy(date, &(ctime(&t)[4]), 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
onehost(char * host)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 memset(&up, 0, 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(&up, &addr);
198 clnt_destroy(rusers_clnt);
199 }
200
201 static void
allhosts(void)202 allhosts(void)
203 {
204 utmpidlearr up;
205 enum clnt_stat clnt_stat;
206
207 memset(&up, 0, 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
usage(void)217 usage(void)
218 {
219
220 fprintf(stderr, "usage: rusers [-al] [host ...]\n");
221 exit(1);
222 }
223
224 int
main(int argc,char * argv[])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 (void)onehost(argv[optind]);
248 }
249 exit(0);
250 }
251