Annotation of src/usr.bin/rusers/rusers.c, Revision 1.2
1.1 deraadt 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. The name of the author may not be used to endorse or promote products
14: * derived from this software without specific prior written permission.
15: *
16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26: * POSSIBILITY OF SUCH DAMAGE.
27: */
28:
29: #ifndef lint
1.2 ! deraadt 30: static char rcsid[] = "$Id: rusers.c,v 1.1.1.1 1995/10/18 08:46:04 deraadt Exp $";
1.1 deraadt 31: #endif /* not lint */
32:
33: #include <sys/types.h>
34: #include <sys/param.h>
35: #include <sys/socket.h>
36: #include <netdb.h>
37: #include <stdio.h>
38: #include <strings.h>
39: #include <rpc/rpc.h>
40: #include <arpa/inet.h>
41: #include <utmp.h>
42: #include <stdlib.h>
43:
44: /*
45: * For now we only try version 2 of the protocol. The current
46: * version is 3 (rusers.h), but only Solaris and NetBSD seem
47: * to support it currently.
48: */
49: #include <rpcsvc/rnusers.h> /* Old version */
50:
51: #define MAX_INT 0x7fffffff
52: #define HOST_WIDTH 20
53: #define LINE_WIDTH 8
54: char *argv0;
55:
56: struct timeval timeout = { 25, 0 };
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: int
66: search_host(struct in_addr addr)
67: {
68: struct host_list *hp;
69:
70: if (!hosts)
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: 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)))) {
86: fprintf(stderr, "%s: no memory.\n", argv0);
87: exit(1);
88: }
89: hp->addr.s_addr = addr.s_addr;
90: hp->next = hosts;
91: hosts = hp;
92: }
93:
94: int
95: rusers_reply(char *replyp, struct sockaddr_in *raddrp)
96: {
97: int x, idle;
98: char date[32], idle_time[64], remote[64], local[64];
99: struct hostent *hp;
100: struct utmpidlearr *up = (struct utmpidlearr *)replyp;
101: char *host;
102: int days, hours, minutes, seconds;
103:
104: if (search_host(raddrp->sin_addr))
105: return(0);
106:
107: if (!allopt && !up->uia_cnt)
108: return(0);
109:
110: hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
111: sizeof(struct in_addr), AF_INET);
112: if (hp)
113: host = hp->h_name;
114: else
115: host = inet_ntoa(raddrp->sin_addr);
116:
117: if (!longopt)
118: printf("%-*.*s ", HOST_WIDTH, HOST_WIDTH, host);
119:
120: for (x = 0; x < up->uia_cnt; x++) {
121: strncpy(date,
122: &(ctime((time_t *)&(up->uia_arr[x]->ui_utmp.ut_time))[4]),
123: sizeof(date)-1);
124:
125: idle = up->uia_arr[x]->ui_idle;
126: sprintf(idle_time, " :%02d", idle);
127: if (idle == MAX_INT)
128: strcpy(idle_time, "??");
129: else if (idle == 0)
130: strcpy(idle_time, "");
131: else {
132: seconds = idle;
133: days = seconds/(60*60*24);
134: seconds %= (60*60*24);
135: hours = seconds/(60*60);
136: seconds %= (60*60);
137: minutes = seconds/60;
138: seconds %= 60;
139: if (idle > 60)
140: sprintf(idle_time, "%2d:%02d",
141: minutes, seconds);
142: if (idle >= (60*60))
143: sprintf(idle_time, "%2d:%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->uia_arr[x]->ui_utmp.ut_host,
151: sizeof(remote)-1);
152: if (strlen(remote) != 0)
153: sprintf(remote, "(%.16s)",
154: up->uia_arr[x]->ui_utmp.ut_host);
155:
156: if (longopt) {
157: strncpy(local, host, sizeof(local));
158: local[HOST_WIDTH + LINE_WIDTH + 1 -
159: strlen(up->uia_arr[x]->ui_utmp.ut_line) - 1] = 0;
160: strcat(local, ":");
161: strcat(local, up->uia_arr[x]->ui_utmp.ut_line);
162:
163: printf("%-8.8s %-*.*s %-12.12s %8s %.18s\n",
164: up->uia_arr[x]->ui_utmp.ut_name,
165: HOST_WIDTH+LINE_WIDTH+1, HOST_WIDTH+LINE_WIDTH+1, local,
166: date,
167: idle_time,
168: remote);
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: {
183: struct utmpidlearr up;
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: {
214: struct utmpidlearr up;
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:
240: if (!(argv0 = rindex(argv[0], '/')))
241: argv0 = argv[0];
242: else
243: argv0++;
244:
245:
246: while ((ch = getopt(argc, argv, "al")) != -1)
247: switch (ch) {
248: case 'a':
249: allopt++;
250: break;
251: case 'l':
252: longopt++;
253: break;
254: default:
255: usage();
256: /*NOTREACHED*/
257: }
258:
259: setlinebuf(stdout);
260: if (argc == optind)
261: allhosts();
262: else {
263: for (; optind < argc; optind++)
264: (void) onehost(argv[optind]);
265: }
266: exit(0);
267: }