Annotation of src/usr.bin/rusers/rusers.c, Revision 1.13
1.13 ! millert 1: /* $OpenBSD: rusers.c,v 1.12 2001/06/18 22:19:04 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
1.13 ! millert 32: static const char rcsid[] = "$OpenBSD: rusers.c,v 1.12 2001/06/18 22:19:04 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>
1.11 pjanzen 39: #include <err.h>
1.1 deraadt 40: #include <stdio.h>
1.8 millert 41: #include <string.h>
1.1 deraadt 42: #include <rpc/rpc.h>
1.6 deraadt 43: #include <rpc/pmap_clnt.h>
1.1 deraadt 44: #include <arpa/inet.h>
45: #include <stdlib.h>
46:
47: /*
48: * For now we only try version 2 of the protocol. The current
49: * version is 3 (rusers.h), but only Solaris and NetBSD seem
50: * to support it currently.
51: */
52: #include <rpcsvc/rnusers.h> /* Old version */
53:
54: #define MAX_INT 0x7fffffff
1.11 pjanzen 55: /* Preferred formatting */
1.1 deraadt 56: #define HOST_WIDTH 20
57: #define LINE_WIDTH 8
1.11 pjanzen 58: #define NAME_WIDTH 8
1.1 deraadt 59:
60: struct timeval timeout = { 25, 0 };
61: int longopt;
62: int allopt;
63:
64: struct host_list {
65: struct host_list *next;
66: struct in_addr addr;
67: } *hosts;
68:
1.11 pjanzen 69: extern char *__progname;
70:
1.1 deraadt 71: int
72: search_host(struct in_addr addr)
73: {
74: struct host_list *hp;
75:
76: if (!hosts)
77: return(0);
78:
79: for (hp = hosts; hp != NULL; hp = hp->next) {
80: if (hp->addr.s_addr == addr.s_addr)
81: return(1);
82: }
83: return(0);
84: }
85:
86: void
87: remember_host(struct in_addr addr)
88: {
89: struct host_list *hp;
90:
1.11 pjanzen 91: if (!(hp = (struct host_list *)malloc(sizeof(struct host_list))))
92: err(1, NULL);
1.1 deraadt 93: hp->addr.s_addr = addr.s_addr;
94: hp->next = hosts;
95: hosts = hp;
96: }
97:
98: int
99: rusers_reply(char *replyp, struct sockaddr_in *raddrp)
100: {
1.11 pjanzen 101: int x, idle, i;
1.13 ! millert 102: char date[32], idle_time[64], remote[RNUSERS_MAXHOSTLEN + 1];
1.11 pjanzen 103: char local[HOST_WIDTH + LINE_WIDTH + 2];
1.13 ! millert 104: char utline[RNUSERS_MAXLINELEN + 1];
1.1 deraadt 105: struct hostent *hp;
1.4 deraadt 106: utmpidlearr *up = (utmpidlearr *)replyp;
1.11 pjanzen 107: char *host, *tmp;
1.1 deraadt 108: int days, hours, minutes, seconds;
109:
110: if (search_host(raddrp->sin_addr))
111: return(0);
112:
113: if (!allopt && !up->uia_cnt)
114: return(0);
115:
116: hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
117: sizeof(struct in_addr), AF_INET);
118: if (hp)
119: host = hp->h_name;
120: else
121: host = inet_ntoa(raddrp->sin_addr);
122:
123: if (!longopt)
124: printf("%-*.*s ", HOST_WIDTH, HOST_WIDTH, host);
125:
126: for (x = 0; x < up->uia_cnt; x++) {
1.11 pjanzen 127: strlcpy(date,
1.4 deraadt 128: &(ctime((time_t *)&(up->uia_arr[x]->ui_utmp.ut_time))[4]),
1.11 pjanzen 129: sizeof(date));
130: /* ctime() adds a trailing \n. Trimming it is only
131: * mandatory if the output formatting changes.
132: */
133: if ((tmp = strchr(date, '\n')) != NULL)
134: *tmp = '\0';
1.1 deraadt 135:
136: idle = up->uia_arr[x]->ui_idle;
137: sprintf(idle_time, " :%02d", idle);
138: if (idle == MAX_INT)
139: strcpy(idle_time, "??");
140: else if (idle == 0)
141: strcpy(idle_time, "");
142: else {
143: seconds = idle;
144: days = seconds/(60*60*24);
145: seconds %= (60*60*24);
146: hours = seconds/(60*60);
147: seconds %= (60*60);
148: minutes = seconds/60;
149: seconds %= 60;
150: if (idle > 60)
151: sprintf(idle_time, "%2d:%02d",
1.4 deraadt 152: minutes, seconds);
1.1 deraadt 153: if (idle >= (60*60))
154: sprintf(idle_time, "%2d:%02d:%02d",
1.4 deraadt 155: hours, minutes, seconds);
1.1 deraadt 156: if (idle >= (24*60*60))
157: sprintf(idle_time, "%d days, %d:%02d:%02d",
1.4 deraadt 158: days, hours, minutes, seconds);
1.1 deraadt 159: }
160:
161: strncpy(remote, up->uia_arr[x]->ui_utmp.ut_host,
162: sizeof(remote)-1);
1.11 pjanzen 163: remote[sizeof(remote) - 1] = '\0';
1.1 deraadt 164: if (strlen(remote) != 0)
1.13 ! millert 165: snprintf(remote, sizeof(remote), "(%.16s)",
1.1 deraadt 166: up->uia_arr[x]->ui_utmp.ut_host);
167:
168: if (longopt) {
169: strncpy(local, host, sizeof(local));
1.11 pjanzen 170: strncpy(utline, up->uia_arr[x]->ui_utmp.ut_line,
1.13 ! millert 171: sizeof(utline) - 1);
1.11 pjanzen 172: utline[sizeof(utline) - 1] = '\0';
173: i = sizeof(local) - strlen(utline) - 2;
174: if (i < 0)
175: i = 0;
176: local[i] = '\0';
1.1 deraadt 177: strcat(local, ":");
1.11 pjanzen 178: strlcat(local, utline, sizeof(local));
1.1 deraadt 179:
1.9 deraadt 180: printf("%-*.*s %-*.*s %-12.12s %8s %.18s\n",
1.13 ! millert 181: NAME_WIDTH, RNUSERS_MAXUSERLEN,
1.1 deraadt 182: up->uia_arr[x]->ui_utmp.ut_name,
1.4 deraadt 183: HOST_WIDTH+LINE_WIDTH+1, HOST_WIDTH+LINE_WIDTH+1,
184: local, date, idle_time, remote);
1.1 deraadt 185: } else
1.13 ! millert 186: printf("%.*s ", RNUSERS_MAXUSERLEN,
1.1 deraadt 187: up->uia_arr[x]->ui_utmp.ut_name);
188: }
189: if (!longopt)
190: putchar('\n');
191:
192: remember_host(raddrp->sin_addr);
193: return(0);
194: }
195:
196: void
197: onehost(char *host)
198: {
1.4 deraadt 199: utmpidlearr up;
1.1 deraadt 200: CLIENT *rusers_clnt;
201: struct sockaddr_in addr;
202: struct hostent *hp;
203:
204: hp = gethostbyname(host);
1.11 pjanzen 205: if (hp == NULL)
206: errx(1, "unknown host \"%s\"", host);
1.1 deraadt 207:
208: rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
209: if (rusers_clnt == NULL) {
1.11 pjanzen 210: clnt_pcreateerror(__progname);
1.1 deraadt 211: exit(1);
212: }
213:
214: bzero((char *)&up, sizeof(up));
215: if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL,
216: xdr_utmpidlearr, &up, timeout) != RPC_SUCCESS) {
1.11 pjanzen 217: clnt_perror(rusers_clnt, __progname);
1.12 deraadt 218: clnt_destroy(rusers_clnt);
1.1 deraadt 219: exit(1);
220: }
221: addr.sin_addr.s_addr = *(int *)hp->h_addr;
222: rusers_reply((char *)&up, &addr);
1.12 deraadt 223: clnt_destroy(rusers_clnt);
1.1 deraadt 224: }
225:
226: void
227: allhosts(void)
228: {
1.4 deraadt 229: utmpidlearr up;
1.1 deraadt 230: enum clnt_stat clnt_stat;
231:
232: bzero((char *)&up, sizeof(up));
233: clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
234: RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr,
1.6 deraadt 235: (char *)&up, rusers_reply);
1.11 pjanzen 236: if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
237: errx(1, "%s", clnt_sperrno(clnt_stat));
1.1 deraadt 238: }
239:
1.2 deraadt 240: void
241: usage(void)
1.1 deraadt 242: {
1.11 pjanzen 243: fprintf(stderr, "Usage: %s [-la] [hosts ...]\n", __progname);
1.1 deraadt 244: exit(1);
245: }
246:
1.2 deraadt 247: int
248: main(int argc, char *argv[])
1.1 deraadt 249: {
250: int ch;
251: extern int optind;
252:
253: while ((ch = getopt(argc, argv, "al")) != -1)
254: switch (ch) {
255: case 'a':
256: allopt++;
257: break;
258: case 'l':
259: longopt++;
260: break;
261: default:
262: usage();
263: /*NOTREACHED*/
264: }
265:
266: setlinebuf(stdout);
267: if (argc == optind)
268: allhosts();
269: else {
270: for (; optind < argc; optind++)
271: (void) onehost(argv[optind]);
272: }
273: exit(0);
274: }
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