Annotation of src/usr.bin/rusers/rusers.c, Revision 1.5
1.5 ! millert 1: /* $OpenBSD: rusers.c,v 1.4 1996/08/16 22:24:18 deraadt Exp $ */
1.3 deraadt 2:
1.1 deraadt 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. The name of the author may not be used to endorse or promote products
16: * derived from this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
19: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
22: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
27: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28: * POSSIBILITY OF SUCH DAMAGE.
29: */
30:
31: #ifndef lint
1.5 ! millert 32: static char rcsid[] = "$OpenBSD: rusers.c,v 1.4 1996/08/16 22:24:18 deraadt Exp $";
1.1 deraadt 33: #endif /* not lint */
34:
35: #include <sys/types.h>
36: #include <sys/param.h>
37: #include <sys/socket.h>
38: #include <netdb.h>
39: #include <stdio.h>
40: #include <strings.h>
41: #include <rpc/rpc.h>
42: #include <arpa/inet.h>
43: #include <utmp.h>
44: #include <stdlib.h>
45:
46: /*
47: * For now we only try version 2 of the protocol. The current
48: * version is 3 (rusers.h), but only Solaris and NetBSD seem
49: * to support it currently.
50: */
51: #include <rpcsvc/rnusers.h> /* Old version */
52:
53: #define MAX_INT 0x7fffffff
54: #define HOST_WIDTH 20
55: #define LINE_WIDTH 8
56: char *argv0;
57:
58: struct timeval timeout = { 25, 0 };
59: int longopt;
60: int allopt;
61:
62: struct host_list {
63: struct host_list *next;
64: struct in_addr addr;
65: } *hosts;
66:
67: int
68: search_host(struct in_addr addr)
69: {
70: struct host_list *hp;
71:
72: if (!hosts)
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: void
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)))) {
88: fprintf(stderr, "%s: no memory.\n", argv0);
89: exit(1);
90: }
91: hp->addr.s_addr = addr.s_addr;
92: hp->next = hosts;
93: hosts = hp;
94: }
95:
96: int
97: rusers_reply(char *replyp, struct sockaddr_in *raddrp)
98: {
99: int x, idle;
100: char date[32], idle_time[64], remote[64], local[64];
101: struct hostent *hp;
1.4 deraadt 102: utmpidlearr *up = (utmpidlearr *)replyp;
1.1 deraadt 103: char *host;
104: int days, hours, minutes, seconds;
105:
106: if (search_host(raddrp->sin_addr))
107: return(0);
108:
109: if (!allopt && !up->uia_cnt)
110: return(0);
111:
112: hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
113: sizeof(struct in_addr), AF_INET);
114: if (hp)
115: host = hp->h_name;
116: else
117: host = inet_ntoa(raddrp->sin_addr);
118:
119: if (!longopt)
120: printf("%-*.*s ", HOST_WIDTH, HOST_WIDTH, host);
121:
122: for (x = 0; x < up->uia_cnt; x++) {
123: strncpy(date,
1.4 deraadt 124: &(ctime((time_t *)&(up->uia_arr[x]->ui_utmp.ut_time))[4]),
125: sizeof(date)-1);
1.1 deraadt 126:
127: idle = up->uia_arr[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, "%2d:%02d",
1.4 deraadt 143: minutes, seconds);
1.1 deraadt 144: if (idle >= (60*60))
145: sprintf(idle_time, "%2d:%02d:%02d",
1.4 deraadt 146: hours, minutes, seconds);
1.1 deraadt 147: if (idle >= (24*60*60))
148: sprintf(idle_time, "%d days, %d:%02d:%02d",
1.4 deraadt 149: days, hours, minutes, seconds);
1.1 deraadt 150: }
151:
152: strncpy(remote, up->uia_arr[x]->ui_utmp.ut_host,
153: sizeof(remote)-1);
154: if (strlen(remote) != 0)
155: sprintf(remote, "(%.16s)",
156: up->uia_arr[x]->ui_utmp.ut_host);
157:
158: if (longopt) {
159: strncpy(local, host, sizeof(local));
160: local[HOST_WIDTH + LINE_WIDTH + 1 -
161: strlen(up->uia_arr[x]->ui_utmp.ut_line) - 1] = 0;
162: strcat(local, ":");
163: strcat(local, up->uia_arr[x]->ui_utmp.ut_line);
164:
165: printf("%-8.8s %-*.*s %-12.12s %8s %.18s\n",
166: up->uia_arr[x]->ui_utmp.ut_name,
1.4 deraadt 167: HOST_WIDTH+LINE_WIDTH+1, HOST_WIDTH+LINE_WIDTH+1,
168: local, date, idle_time, remote);
1.1 deraadt 169: } else
170: printf("%0.8s ",
171: up->uia_arr[x]->ui_utmp.ut_name);
172: }
173: if (!longopt)
174: putchar('\n');
175:
176: remember_host(raddrp->sin_addr);
177: return(0);
178: }
179:
180: void
181: onehost(char *host)
182: {
1.4 deraadt 183: utmpidlearr up;
1.1 deraadt 184: CLIENT *rusers_clnt;
185: struct sockaddr_in addr;
186: struct hostent *hp;
187:
188: hp = gethostbyname(host);
189: if (hp == NULL) {
190: fprintf(stderr, "%s: unknown host \"%s\"\n",
191: argv0, host);
192: exit(1);
193: }
194:
195: rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
196: if (rusers_clnt == NULL) {
197: clnt_pcreateerror(argv0);
198: exit(1);
199: }
200:
201: bzero((char *)&up, sizeof(up));
202: if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL,
203: xdr_utmpidlearr, &up, timeout) != RPC_SUCCESS) {
204: clnt_perror(rusers_clnt, argv0);
205: exit(1);
206: }
207: addr.sin_addr.s_addr = *(int *)hp->h_addr;
208: rusers_reply((char *)&up, &addr);
209: }
210:
211: void
212: allhosts(void)
213: {
1.4 deraadt 214: utmpidlearr up;
1.1 deraadt 215: enum clnt_stat clnt_stat;
216:
217: bzero((char *)&up, sizeof(up));
218: clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
219: RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr,
220: &up, rusers_reply);
221: if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT) {
222: fprintf(stderr, "%s: %s\n", argv0, clnt_sperrno(clnt_stat));
223: exit(1);
224: }
225: }
226:
1.2 deraadt 227: void
228: usage(void)
1.1 deraadt 229: {
230: fprintf(stderr, "Usage: %s [-la] [hosts ...]\n", argv0);
231: exit(1);
232: }
233:
1.2 deraadt 234: int
235: main(int argc, char *argv[])
1.1 deraadt 236: {
237: int ch;
238: extern int optind;
239:
1.5 ! millert 240: if (!(argv0 = strrchr(argv[0], '/')))
1.1 deraadt 241: argv0 = argv[0];
242: else
243: argv0++;
244:
245: while ((ch = getopt(argc, argv, "al")) != -1)
246: switch (ch) {
247: case 'a':
248: allopt++;
249: break;
250: case 'l':
251: longopt++;
252: break;
253: default:
254: usage();
255: /*NOTREACHED*/
256: }
257:
258: setlinebuf(stdout);
259: if (argc == optind)
260: allhosts();
261: else {
262: for (; optind < argc; optind++)
263: (void) onehost(argv[optind]);
264: }
265: exit(0);
266: }
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