Annotation of src/usr.bin/rusers/rusers.c, Revision 1.24
1.24 ! deraadt 1: /* $OpenBSD: rusers.c,v 1.23 2003/06/04 17:37:16 deraadt Exp $ */
1.3 deraadt 2:
1.14 millert 3: /*
1.21 millert 4: * Copyright (c) 2001, 2003 Todd C. Miller <Todd.Miller@courtesan.com>
1.14 millert 5: *
1.22 millert 6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.14 millert 9: *
1.22 millert 10: * THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
11: * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
12: * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
13: * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
15: * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
16: * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.14 millert 17: */
1.1 deraadt 18: /*-
19: * Copyright (c) 1993 John Brezak
20: * All rights reserved.
1.14 millert 21: *
1.1 deraadt 22: * Redistribution and use in source and binary forms, with or without
23: * modification, are permitted provided that the following conditions
24: * are met:
25: * 1. Redistributions of source code must retain the above copyright
26: * notice, this list of conditions and the following disclaimer.
27: * 2. Redistributions in binary form must reproduce the above copyright
28: * notice, this list of conditions and the following disclaimer in the
29: * documentation and/or other materials provided with the distribution.
30: * 3. The name of the author may not be used to endorse or promote products
31: * derived from this software without specific prior written permission.
1.14 millert 32: *
1.1 deraadt 33: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
34: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
35: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
36: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
37: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
42: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
43: * POSSIBILITY OF SUCH DAMAGE.
44: */
45:
46: #ifndef lint
1.24 ! deraadt 47: static const char rcsid[] = "$OpenBSD: rusers.c,v 1.23 2003/06/04 17:37:16 deraadt Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: #include <sys/param.h>
1.14 millert 51: #include <sys/ioctl.h>
1.1 deraadt 52: #include <sys/socket.h>
1.14 millert 53: #include <rpc/rpc.h>
1.16 millert 54: #include <rpc/pmap_prot.h>
55: #include <rpc/pmap_rmt.h>
1.14 millert 56: #include <rpcsvc/rusers.h>
57: #include <rpcsvc/rnusers.h> /* Old protocol version */
1.16 millert 58: #include <arpa/inet.h>
59: #include <net/if.h>
1.14 millert 60: #include <err.h>
1.16 millert 61: #include <errno.h>
62: #include <ifaddrs.h>
1.1 deraadt 63: #include <netdb.h>
64: #include <stdio.h>
1.14 millert 65: #include <stdlib.h>
1.8 millert 66: #include <string.h>
1.14 millert 67: #include <termios.h>
68: #include <unistd.h>
1.1 deraadt 69:
1.11 pjanzen 70: /* Preferred formatting */
1.14 millert 71: #define HOST_WIDTH 17
1.1 deraadt 72: #define LINE_WIDTH 8
1.11 pjanzen 73: #define NAME_WIDTH 8
1.1 deraadt 74:
1.18 millert 75: #define MAX_BROADCAST_SIZE 1400
76:
77: struct host_info {
78: u_int count;
79: u_int idle;
80: char *host;
81: rusers_utmp *users;
82: } *hostinfo;
83:
1.21 millert 84: void print_entry(struct host_info *, int);
1.14 millert 85: void fmt_idle(int, char *, size_t);
86: void onehost(char *);
87: void allhosts(void);
1.18 millert 88: void sorthosts(void);
1.19 millert 89: void expandhosts(void);
1.16 millert 90: void alarmclock(int);
1.18 millert 91: char *estrndup(const char *, size_t);
92: struct host_info *add_host(char *);
93: int hcompare(const void *, const void *);
94: int icompare(const void *, const void *);
95: int ucompare(const void *, const void *);
1.14 millert 96: bool_t rusers_reply(char *, struct sockaddr_in *);
97: bool_t rusers_reply_3(char *, struct sockaddr_in *);
1.16 millert 98: enum clnt_stat get_reply(int, in_port_t, u_long, struct rpc_msg *,
99: struct rmtcallres *, bool_t (*)());
1.14 millert 100: __dead void usage(void);
101:
1.18 millert 102: int aflag, hflag, iflag, lflag, uflag;
103: u_int nentries, maxentries;
1.14 millert 104: long termwidth;
105: extern char *__progname;
1.1 deraadt 106:
1.14 millert 107: int
108: main(int argc, char **argv)
109: {
110: struct winsize win;
111: char *cp, *ep;
112: int ch;
113:
1.18 millert 114: while ((ch = getopt(argc, argv, "ahilu")) != -1)
1.14 millert 115: switch (ch) {
116: case 'a':
1.18 millert 117: aflag = 1;
118: break;
119: case 'h':
120: hflag = 1;
121: break;
122: case 'i':
123: iflag = 1;
1.14 millert 124: break;
125: case 'l':
1.18 millert 126: lflag = 1;
127: break;
128: case 'u':
129: uflag = 1;
1.14 millert 130: break;
131: default:
132: usage();
133: /*NOTREACHED*/
134: }
135:
1.18 millert 136: if (hflag + iflag + uflag > 1)
137: usage();
138:
1.14 millert 139: if (isatty(STDOUT_FILENO)) {
140: if ((cp = getenv("COLUMNS")) != NULL && *cp != '\0') {
141: termwidth = strtol(cp, &ep, 10);
142: if (*ep != '\0' || termwidth >= INT_MAX ||
143: termwidth < 0)
144: termwidth = 0;
145: }
146: if (termwidth == 0 &&
147: ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 &&
148: win.ws_col > 0)
149: termwidth = win.ws_col;
150: else
151: termwidth = 80;
1.23 deraadt 152: } else
153: termwidth = 80;
1.14 millert 154: setlinebuf(stdout);
1.18 millert 155:
156: if (argc == optind) {
157: if (hflag || iflag || uflag) {
158: puts("Collecting responses...");
159: allhosts();
160: sorthosts();
161: } else
162: allhosts();
163: } else {
1.21 millert 164: aflag = 1;
1.14 millert 165: for (; optind < argc; optind++)
166: (void) onehost(argv[optind]);
1.21 millert 167: if (hflag || iflag || uflag)
168: sorthosts();
1.14 millert 169: }
1.18 millert 170:
1.14 millert 171: exit(0);
172: }
1.11 pjanzen 173:
1.18 millert 174: struct host_info *
175: add_host(char *host)
1.1 deraadt 176: {
1.18 millert 177: int i;
1.1 deraadt 178:
1.18 millert 179: for (i = 0; i < nentries; i++) {
180: /* Existing entry. */
181: if (strcmp(host, hostinfo[i].host) == 0)
182: return(NULL);
1.1 deraadt 183: }
184:
1.18 millert 185: /* New entry, allocate space if needed and store. */
186: if (nentries == maxentries) {
187: maxentries += 128;
188: hostinfo = realloc(hostinfo,
189: sizeof(*hostinfo) * maxentries);
190: if (hostinfo == NULL)
1.14 millert 191: err(1, NULL);
192: }
1.18 millert 193: if ((hostinfo[nentries].host = strdup(host)) == NULL)
194: err(1, NULL);
195: return(&hostinfo[nentries++]);
1.14 millert 196: }
197:
198: void
199: fmt_idle(int idle, char *idle_time, size_t idle_time_len)
200: {
201: int days, hours, minutes, seconds;
202:
203: switch (idle) {
204: case 0:
205: *idle_time = '\0';
206: break;
207: case INT_MAX:
208: strlcpy(idle_time, "??", idle_time_len);
209: break;
210: default:
211: seconds = idle;
212: days = seconds / (60*60*24);
213: seconds %= (60*60*24);
214: hours = seconds / (60*60);
215: seconds %= (60*60);
216: minutes = seconds / 60;
217: seconds %= 60;
218: if (idle >= (24*60*60))
219: snprintf(idle_time, idle_time_len,
1.21 millert 220: "%d day%s, %d:%02d:%02d", days,
221: days > 1 ? "s" : "", hours, minutes, seconds);
1.14 millert 222: else if (idle >= (60*60))
223: snprintf(idle_time, idle_time_len, "%2d:%02d:%02d",
224: hours, minutes, seconds);
225: else if (idle > 60)
226: snprintf(idle_time, idle_time_len, "%2d:%02d",
227: minutes, seconds);
228: else
229: snprintf(idle_time, idle_time_len, " :%02d", idle);
230: break;
231: }
232: }
233:
1.15 millert 234: bool_t
1.1 deraadt 235: rusers_reply(char *replyp, struct sockaddr_in *raddrp)
236: {
1.14 millert 237: utmpidlearr *up = (utmpidlearr *)replyp;
1.18 millert 238: struct host_info *entry;
1.1 deraadt 239: struct hostent *hp;
1.18 millert 240: rusers_utmp *ut;
241: char *host;
1.14 millert 242: int i;
1.1 deraadt 243:
1.18 millert 244: if (!aflag && up->uia_cnt == 0)
1.1 deraadt 245: return(0);
246:
1.15 millert 247: hp = gethostbyaddr((char *)&raddrp->sin_addr,
1.14 millert 248: sizeof(struct in_addr), AF_INET);
1.18 millert 249: if (hp)
1.1 deraadt 250: host = hp->h_name;
1.18 millert 251: else
1.1 deraadt 252: host = inet_ntoa(raddrp->sin_addr);
1.18 millert 253: if ((entry = add_host(host)) == NULL)
254: return(0);
255:
1.21 millert 256: if (up->uia_cnt == 0)
257: ut = NULL;
258: else if ((ut = malloc(up->uia_cnt * sizeof(*ut))) == NULL)
1.18 millert 259: err(1, NULL);
260: entry->users = ut;
261: entry->count = up->uia_cnt;
262: entry->idle = UINT_MAX;
263: for (i = 0; i < up->uia_cnt; i++, ut++) {
264: ut->ut_user = estrndup(up->uia_arr[i]->ui_utmp.ut_name,
265: RNUSERS_MAXUSERLEN);
266: ut->ut_line = estrndup(up->uia_arr[i]->ui_utmp.ut_line,
267: RNUSERS_MAXLINELEN);
268: ut->ut_host = estrndup(up->uia_arr[i]->ui_utmp.ut_host,
269: RNUSERS_MAXHOSTLEN);
270: ut->ut_time = up->uia_arr[i]->ui_utmp.ut_time;
271: ut->ut_idle = up->uia_arr[i]->ui_idle;
272: if (ut->ut_idle < entry->idle)
273: entry->idle = ut->ut_idle;
274: }
275:
276: if (!hflag && !iflag && !uflag) {
1.21 millert 277: print_entry(entry, lflag && entry->count);
1.18 millert 278: for (i = 0, ut = entry->users; i < entry->count; i++, ut++) {
279: free(ut->ut_user);
280: free(ut->ut_line);
281: free(ut->ut_host);
1.14 millert 282: }
1.18 millert 283: free(entry->users);
1.14 millert 284: }
285:
286: return(0);
287: }
1.1 deraadt 288:
1.15 millert 289: bool_t
1.14 millert 290: rusers_reply_3(char *replyp, struct sockaddr_in *raddrp)
291: {
292: utmp_array *up3 = (utmp_array *)replyp;
1.18 millert 293: struct host_info *entry;
1.14 millert 294: struct hostent *hp;
1.18 millert 295: rusers_utmp *ut;
296: char *host;
1.14 millert 297: int i;
298:
1.21 millert 299: if (!aflag && up3->utmp_array_len == 0)
1.14 millert 300: return(0);
1.16 millert 301:
1.15 millert 302: hp = gethostbyaddr((char *)&raddrp->sin_addr,
1.14 millert 303: sizeof(struct in_addr), AF_INET);
1.18 millert 304: if (hp)
1.14 millert 305: host = hp->h_name;
1.18 millert 306: else
1.14 millert 307: host = inet_ntoa(raddrp->sin_addr);
1.18 millert 308: if ((entry = add_host(host)) == NULL)
309: return(0);
310:
1.21 millert 311: if (up3->utmp_array_len == 0)
312: ut = NULL;
313: else if ((ut = malloc(up3->utmp_array_len * sizeof(*ut))) == NULL)
1.18 millert 314: err(1, NULL);
315: entry->users = ut;
316: entry->count = up3->utmp_array_len;
317: entry->idle = UINT_MAX;
318: for (i = 0; i < up3->utmp_array_len; i++, ut++) {
319: ut->ut_user = estrndup(up3->utmp_array_val[i].ut_user,
320: RUSERS_MAXUSERLEN);
321: ut->ut_line = estrndup(up3->utmp_array_val[i].ut_line,
322: RUSERS_MAXLINELEN);
323: ut->ut_host = estrndup(up3->utmp_array_val[i].ut_host,
324: RUSERS_MAXHOSTLEN);
325: ut->ut_time = up3->utmp_array_val[i].ut_time;
326: ut->ut_idle = up3->utmp_array_val[i].ut_idle;
327: if (ut->ut_idle < entry->idle)
328: entry->idle = ut->ut_idle;
329: }
330:
331: if (!hflag && !iflag && !uflag) {
1.21 millert 332: print_entry(entry, lflag && entry->count);
1.18 millert 333: for (i = 0, ut = entry->users; i < entry->count; i++, ut++) {
334: free(ut->ut_user);
335: free(ut->ut_line);
336: free(ut->ut_host);
1.14 millert 337: }
1.18 millert 338: free(entry->users);
1.1 deraadt 339: }
340:
341: return(0);
342: }
343:
344: void
345: onehost(char *host)
346: {
1.4 deraadt 347: utmpidlearr up;
1.14 millert 348: utmp_array up3;
1.1 deraadt 349: CLIENT *rusers_clnt;
1.16 millert 350: struct sockaddr_in sin;
1.1 deraadt 351: struct hostent *hp;
1.14 millert 352: struct timeval tv = { 25, 0 };
353: int error;
1.1 deraadt 354:
1.20 deraadt 355: memset(&sin, 0, sizeof sin);
356:
1.1 deraadt 357: hp = gethostbyname(host);
1.11 pjanzen 358: if (hp == NULL)
359: errx(1, "unknown host \"%s\"", host);
1.1 deraadt 360:
1.18 millert 361: /* Try version 3 first. */
1.14 millert 362: rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_3, "udp");
363: if (rusers_clnt == NULL) {
364: clnt_pcreateerror(__progname);
365: exit(1);
366: }
367:
368: memset(&up3, 0, sizeof(up3));
369: error = clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL,
370: xdr_utmp_array, &up3, tv);
371: switch (error) {
372: case RPC_SUCCESS:
1.16 millert 373: sin.sin_addr.s_addr = *(int *)hp->h_addr;
374: rusers_reply_3((char *)&up3, &sin);
1.14 millert 375: clnt_destroy(rusers_clnt);
376: return;
377: case RPC_PROGVERSMISMATCH:
378: clnt_destroy(rusers_clnt);
379: break;
380: default:
381: clnt_perror(rusers_clnt, __progname);
382: clnt_destroy(rusers_clnt);
383: exit(1);
384: }
385:
1.18 millert 386: /* Fall back to version 2. */
1.1 deraadt 387: rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
388: if (rusers_clnt == NULL) {
1.11 pjanzen 389: clnt_pcreateerror(__progname);
1.1 deraadt 390: exit(1);
391: }
392:
1.14 millert 393: memset(&up, 0, sizeof(up));
394: error = clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL,
395: xdr_utmpidlearr, &up, tv);
396: if (error != RPC_SUCCESS) {
1.11 pjanzen 397: clnt_perror(rusers_clnt, __progname);
1.12 deraadt 398: clnt_destroy(rusers_clnt);
1.1 deraadt 399: exit(1);
400: }
1.16 millert 401: sin.sin_addr.s_addr = *(int *)hp->h_addr;
402: rusers_reply((char *)&up, &sin);
1.12 deraadt 403: clnt_destroy(rusers_clnt);
1.1 deraadt 404: }
405:
1.16 millert 406: enum clnt_stat
407: get_reply(int sock, in_port_t port, u_long xid, struct rpc_msg *msgp,
408: struct rmtcallres *resp, bool_t (*callback)())
409: {
410: ssize_t inlen;
411: socklen_t fromlen;
412: struct sockaddr_in raddr;
413: char inbuf[UDPMSGSIZE];
414: XDR xdr;
415:
416: retry:
417: msgp->acpted_rply.ar_verf = _null_auth;
418: msgp->acpted_rply.ar_results.where = (caddr_t)resp;
419: msgp->acpted_rply.ar_results.proc = xdr_rmtcallres;
420:
421: fromlen = sizeof(struct sockaddr);
422: inlen = recvfrom(sock, inbuf, sizeof(inbuf), 0,
423: (struct sockaddr *)&raddr, &fromlen);
424: if (inlen < 0) {
425: if (errno == EINTR)
426: goto retry;
427: return (RPC_CANTRECV);
428: }
429: if (inlen < sizeof(u_int32_t))
430: goto retry;
431:
432: /*
433: * If the reply we got matches our request, decode the
434: * replay and pass it to the callback function.
435: */
436: xdrmem_create(&xdr, inbuf, (u_int)inlen, XDR_DECODE);
437: if (xdr_replymsg(&xdr, msgp)) {
438: if ((msgp->rm_xid == xid) &&
439: (msgp->rm_reply.rp_stat == MSG_ACCEPTED) &&
440: (msgp->acpted_rply.ar_stat == SUCCESS)) {
441: raddr.sin_port = htons(port);
442: (void)(*callback)(resp->results_ptr, &raddr);
443: }
444: }
445: xdr.x_op = XDR_FREE;
446: msgp->acpted_rply.ar_results.proc = xdr_void;
447: (void)xdr_replymsg(&xdr, msgp);
448: (void)(*resp->xdr_results)(&xdr, resp->results_ptr);
449: xdr_destroy(&xdr);
450:
451: return(RPC_SUCCESS);
452: }
453:
454: enum clnt_stat
455: rpc_setup(int *fdp, XDR *xdr, struct rpc_msg *msg, struct rmtcallargs *args,
456: AUTH *unix_auth, char *buf)
457: {
458: int on = 1;
459:
460: if ((*fdp = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
461: return(RPC_CANTSEND);
462:
463: if (setsockopt(*fdp, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0)
464: return(RPC_CANTSEND);
465:
466: msg->rm_xid = arc4random();
467: msg->rm_direction = CALL;
468: msg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
469: msg->rm_call.cb_prog = PMAPPROG;
470: msg->rm_call.cb_vers = PMAPVERS;
471: msg->rm_call.cb_proc = PMAPPROC_CALLIT;
472: msg->rm_call.cb_cred = unix_auth->ah_cred;
473: msg->rm_call.cb_verf = unix_auth->ah_verf;
474:
475: xdrmem_create(xdr, buf, MAX_BROADCAST_SIZE, XDR_ENCODE);
476: if (!xdr_callmsg(xdr, msg) || !xdr_rmtcall_args(xdr, args))
477: return(RPC_CANTENCODEARGS);
478:
479: return(RPC_SUCCESS);
480: }
481:
1.1 deraadt 482: void
483: allhosts(void)
484: {
1.16 millert 485: enum clnt_stat stat;
486: struct itimerval timeout;
487: AUTH *unix_auth = authunix_create_default();
488: size_t outlen[2];
489: int sock[2] = { -1, -1 };
490: int i, maxfd, rval;
491: u_long xid[2], port[2];
492: fd_set *fds = NULL;
493: struct sockaddr_in *sin, baddr;
494: struct rmtcallargs args;
495: struct rmtcallres res[2];
496: struct rpc_msg msg[2];
497: struct ifaddrs *ifa, *ifap = NULL;
498: char buf[2][MAX_BROADCAST_SIZE];
1.4 deraadt 499: utmpidlearr up;
1.14 millert 500: utmp_array up3;
1.16 millert 501: XDR xdr;
1.14 millert 502:
1.16 millert 503: if (getifaddrs(&ifap) != 0)
504: err(1, "can't get list of interface addresses");
505:
506: memset(&up, 0, sizeof(up));
1.15 millert 507: memset(&up3, 0, sizeof(up3));
1.16 millert 508: memset(&baddr, 0, sizeof(baddr));
509: memset(&res, 0, sizeof(res));
510: memset(&msg, 0, sizeof(msg));
1.17 millert 511: memset(&timeout, 0, sizeof(timeout));
1.16 millert 512:
513: args.prog = RUSERSPROG;
514: args.vers = RUSERSVERS_IDLE;
515: args.proc = RUSERSPROC_NAMES;
516: args.xdr_args = xdr_void;
517: args.args_ptr = NULL;
518:
519: stat = rpc_setup(&sock[0], &xdr, &msg[0], &args, unix_auth, buf[0]);
520: if (stat != RPC_SUCCESS)
521: goto cleanup;
522: xid[0] = msg[0].rm_xid;
523: outlen[0] = xdr_getpos(&xdr);
524: xdr_destroy(&xdr);
525:
526: args.vers = RUSERSVERS_3;
527: stat = rpc_setup(&sock[1], &xdr, &msg[1], &args, unix_auth, buf[1]);
528: if (stat != RPC_SUCCESS)
529: goto cleanup;
530: xid[1] = msg[1].rm_xid;
531: outlen[1] = xdr_getpos(&xdr);
532: xdr_destroy(&xdr);
533:
534: maxfd = MAX(sock[0], sock[1]) + 1;
535: fds = (fd_set *)calloc(howmany(maxfd, NFDBITS), sizeof(fd_mask));
536: if (fds == NULL)
537: err(1, NULL);
538:
539: baddr.sin_len = sizeof(struct sockaddr_in);
540: baddr.sin_family = AF_INET;
541: baddr.sin_port = htons(PMAPPORT);
542: baddr.sin_addr.s_addr = htonl(INADDR_ANY);
543:
544: res[0].port_ptr = &port[0];
545: res[0].xdr_results = xdr_utmpidlearr;
546: res[0].results_ptr = (caddr_t)&up;
547:
548: res[1].port_ptr = &port[1];
549: res[1].xdr_results = xdr_utmp_array;
550: res[1].results_ptr = (caddr_t)&up3;
551:
552: (void)signal(SIGALRM, alarmclock);
553:
554: /*
555: * We do 6 runs through the loop. On even runs we send
556: * a version 3 broadcast. On odd ones we send a version 2
557: * broadcast. This should give version 3 replies enough
558: * of an 'edge' over the old version 2 ones in most cases.
559: * We select() waiting for replies for 5 seconds in between
560: * each broadcast.
561: */
562: for (i = 0; i < 6; i++) {
563: for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
564: if (ifa->ifa_addr->sa_family != AF_INET ||
565: !(ifa->ifa_flags & IFF_BROADCAST) ||
566: !(ifa->ifa_flags & IFF_UP) ||
567: ifa->ifa_broadaddr == NULL ||
568: ifa->ifa_broadaddr->sa_family != AF_INET)
569: continue;
570: sin = (struct sockaddr_in *)ifa->ifa_broadaddr;
571: baddr.sin_addr = sin->sin_addr;
572:
573: /* use protocol 2 or 3 depending on i (odd or even) */
574: if (i & 1) {
575: if (sendto(sock[0], buf[0], outlen[0], 0,
576: (struct sockaddr *)&baddr,
577: sizeof(struct sockaddr)) != outlen[0])
578: err(1, "can't send broadcast packet");
579: } else {
580: if (sendto(sock[1], buf[1], outlen[1], 0,
581: (struct sockaddr *)&baddr,
582: sizeof(struct sockaddr)) != outlen[1])
583: err(1, "can't send broadcast packet");
584: }
585: }
1.14 millert 586:
1.16 millert 587: /*
588: * We stay in the select loop for ~5 seconds
589: */
590: timeout.it_value.tv_sec = 5;
591: timeout.it_value.tv_usec = 0;
1.18 millert 592: while (timerisset(&timeout.it_value)) {
1.16 millert 593: FD_SET(sock[0], fds);
594: FD_SET(sock[1], fds);
595: setitimer(ITIMER_REAL, &timeout, NULL);
596: rval = select(maxfd, fds, NULL, NULL, NULL);
597: setitimer(ITIMER_REAL, NULL, &timeout);
598: if (rval == -1) {
599: if (errno == EINTR)
600: break;
601: err(1, "select"); /* shouldn't happen */
602: }
603: if (FD_ISSET(sock[1], fds)) {
604: stat = get_reply(sock[1], (in_port_t)port[1],
605: xid[1], &msg[1], &res[1], rusers_reply_3);
606: if (stat != RPC_SUCCESS)
607: goto cleanup;
608: }
609: if (FD_ISSET(sock[0], fds)) {
610: stat = get_reply(sock[0], (in_port_t)port[0],
611: xid[0], &msg[0], &res[0], rusers_reply);
612: if (stat != RPC_SUCCESS)
613: goto cleanup;
614: }
615: }
616: }
617: cleanup:
618: if (ifap != NULL)
619: freeifaddrs(ifap);
620: if (fds != NULL)
621: free(fds);
622: if (sock[0] >= 0)
623: (void)close(sock[0]);
624: if (sock[1] >= 0)
625: (void)close(sock[1]);
626: AUTH_DESTROY(unix_auth);
627: if (stat != RPC_SUCCESS) {
628: clnt_perrno(stat);
629: exit(1);
630: }
631: }
632:
633: void
1.21 millert 634: print_entry(struct host_info *entry, int longfmt)
1.18 millert 635: {
636: char date[32], idle_time[64];
637: char remote[RUSERS_MAXHOSTLEN + 3];
638: struct rusers_utmp *ut;
639: int i, len;
640:
1.21 millert 641: if (!longfmt)
1.18 millert 642: printf("%-*.*s ", HOST_WIDTH, HOST_WIDTH, entry->host);
643:
644: for (i = 0, ut = entry->users; i < entry->count; i++, ut++) {
1.21 millert 645: if (longfmt) {
1.18 millert 646: strftime(date, sizeof(date), "%h %d %R",
647: localtime((time_t *)&ut->ut_time));
648: date[sizeof(date) - 1] = '\0';
649: fmt_idle(ut->ut_idle, idle_time, sizeof(idle_time));
650: len = termwidth -
651: (MAX(strlen(ut->ut_user), NAME_WIDTH) + 1 +
652: HOST_WIDTH + 1 + LINE_WIDTH + 1 + strlen(date) +
653: 1 + MAX(8, strlen(idle_time)) + 1 + 2);
654: if (len > 0 && ut->ut_host[0] != '\0')
655: snprintf(remote, sizeof(remote), "(%.*s)",
656: MIN(len, RUSERS_MAXHOSTLEN), ut->ut_host);
657: else
658: remote[0] = '\0';
659: len = HOST_WIDTH - MIN(HOST_WIDTH, strlen(entry->host)) +
660: LINE_WIDTH - MIN(LINE_WIDTH, strlen(ut->ut_line));
661: printf("%-*s %.*s:%.*s%-*s %-12s %8s %s\n",
662: NAME_WIDTH, ut->ut_user, HOST_WIDTH, entry->host,
663: LINE_WIDTH, ut->ut_line, len, "", date,
664: idle_time, remote);
665: } else {
666: fputs(ut->ut_user, stdout);
667: putchar(' ');
668: }
669: }
1.21 millert 670: if (!longfmt)
1.18 millert 671: putchar('\n');
672: }
673:
674: void
1.24 ! deraadt 675: expandhosts(void)
1.19 millert 676: {
677: struct host_info *new_hostinfo, *entry;
678: u_int count;
679: int i, j;
680:
681: for (i = 0, count = 0; i < nentries; i++)
682: count += hostinfo[i].count;
683:
684: new_hostinfo = (struct host_info *)malloc(sizeof(*entry) * count);
685: if (new_hostinfo == NULL)
686: err(1, NULL);
687: for (i = 0, entry = new_hostinfo; i < nentries; i++) {
688: for (j = 0; j < hostinfo[i].count; j++) {
689: memcpy(entry, &hostinfo[i], sizeof(*entry));
690: entry->users = &hostinfo[i].users[j];
691: entry->idle = entry->users->ut_idle;
692: entry->count = 1;
693: entry++;
694: }
695: }
696: free(hostinfo);
697: hostinfo = new_hostinfo;
698: nentries = maxentries = count;
699: }
700:
701: void
1.24 ! deraadt 702: sorthosts(void)
1.18 millert 703: {
704: int i;
705: int (*compar)(const void *, const void *);
1.19 millert 706:
707: if (iflag && lflag)
708: expandhosts();
1.18 millert 709:
710: if (hflag)
711: compar = hcompare;
712: else if (iflag)
713: compar = icompare;
714: else
715: compar = ucompare;
716: qsort(hostinfo, nentries, sizeof(*hostinfo), compar);
717:
718: for (i = 0; i < nentries; i++)
1.21 millert 719: print_entry(&hostinfo[i], lflag && hostinfo[i].count);
1.18 millert 720: }
721:
722: int
723: hcompare(const void *aa, const void *bb)
724: {
725: const struct host_info *a = (struct host_info *)aa;
726: const struct host_info *b = (struct host_info *)bb;
727: int rval;
728:
729: if ((rval = strcasecmp(a->host, b->host)) != 0)
730: return(rval);
731:
732: if (a->idle < b->idle)
733: return(-1);
734: else if (a->idle > b->idle)
735: return(1);
736:
737: if (a->count > b->count)
738: return(-1);
739: else if (a->count < b->count)
740: return(1);
741:
742: return(0);
743: }
744:
745: int
746: icompare(const void *aa, const void *bb)
747: {
748: const struct host_info *a = (struct host_info *)aa;
749: const struct host_info *b = (struct host_info *)bb;
750:
751: if (a->idle < b->idle)
752: return(-1);
753: else if (a->idle > b->idle)
754: return(1);
755:
756: if (a->count > b->count)
757: return(-1);
758: else if (a->count < b->count)
759: return(1);
760:
761: return(strcasecmp(a->host, b->host));
762: }
763:
764: int
765: ucompare(const void *aa, const void *bb)
766: {
767: const struct host_info *a = (struct host_info *)aa;
768: const struct host_info *b = (struct host_info *)bb;
769:
770: if (a->count > b->count)
771: return(-1);
772: else if (a->count < b->count)
773: return(1);
774:
775: if (a->idle < b->idle)
776: return(-1);
777: else if (a->idle > b->idle)
778: return(1);
779:
780: return(strcasecmp(a->host, b->host));
781: }
782:
783: void
1.16 millert 784: alarmclock(int signo)
785: {
786:
787: ; /* just interupt */
1.1 deraadt 788: }
789:
1.18 millert 790: char *
791: estrndup(const char *src, size_t len)
792: {
793: char *dst, *end;
794:
795: if ((end = memchr(src, '\0', len)) != NULL)
796: len = end - src;
797:
798: if ((dst = malloc(len + 1)) == NULL)
799: err(1, NULL);
800: memcpy(dst, src, len);
801: dst[len] = '\0';
802:
803: return(dst);
804: }
805:
1.14 millert 806: void
807: usage(void)
1.1 deraadt 808: {
809:
1.18 millert 810: fprintf(stderr, "usage: %s [-al] [-h | -i | -u] [hosts ...]\n",
811: __progname);
1.14 millert 812: exit(1);
1.1 deraadt 813: }
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