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1.1 root 1: /*
2: * Copyright (c) 1985, 1987, 1988 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms are permitted
6: * provided that: (1) source distributions retain this entire copyright
7: * notice and comment, and (2) distributions including binaries display
8: * the following acknowledgement: ``This product includes software
9: * developed by the University of California, Berkeley and its contributors''
10: * in the documentation or other materials provided with the distribution
11: * and in all advertising materials mentioning features or use of this
12: * software. Neither the name of the University nor the names of its
13: * contributors may be used to endorse or promote products derived
14: * from this software without specific prior written permission.
15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16: * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
18: */
19:
20: #ifndef lint
21: char copyright[] =
22: "@(#) Copyright (c) 1985, 1987, 1988 The Regents of the University of California.\n\
23: All rights reserved.\n";
24: #endif /* not lint */
25:
26: #ifndef lint
27: static char sccsid[] = "@(#)date.c 4.27 (Berkeley) 5/31/90";
28: #endif /* not lint */
29:
30: /*
31: * Date - print and set date
32: */
33:
34: #include <sys/param.h>
35: #include <sys/time.h>
36: #include <sys/file.h>
37: #include <errno.h>
38: #include <syslog.h>
39: #include <utmp.h>
40: #include <tzfile.h>
41: #include <stdio.h>
42: #include <ctype.h>
43: #include <string.h>
44:
45: #define ATOI2(ar) (ar[0] - '0') * 10 + (ar[1] - '0'); ar += 2;
46:
47: static struct timeval tv;
48: static int retval;
49:
50: static int dmsize[] =
51: { -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
52:
53: main(argc, argv)
54: int argc;
55: char **argv;
56: {
57: extern int optind;
58: extern char *optarg;
59: struct timezone tz;
60: char *ap, *tzn;
61: int ch, uflag, nflag;
62: char *username, *getlogin();
63: time_t time();
64:
65: nflag = uflag = 0;
66: tz.tz_dsttime = tz.tz_minuteswest = 0;
67: while ((ch = getopt(argc, argv, "d:nut:")) != EOF)
68: switch((char)ch) {
69: case 'd': /* daylight savings time */
70: tz.tz_dsttime = atoi(optarg) ? 1 : 0;
71: break;
72: case 'n': /* don't set network */
73: nflag = 1;
74: break;
75: case 'u': /* do it in GMT */
76: uflag = 1;
77: break;
78: case 't': /* minutes west of GMT */
79: /* error check; we can't allow "PST" */
80: if (isdigit(*optarg)) {
81: tz.tz_minuteswest = atoi(optarg);
82: break;
83: }
84: /*FALLTHROUGH*/
85: default:
86: usage();
87: exit(1);
88: }
89: argc -= optind;
90: argv += optind;
91:
92: if (argc > 1) {
93: usage();
94: exit(1);
95: }
96:
97: if ((tz.tz_minuteswest || tz.tz_dsttime) &&
98: settimeofday((struct timeval *)NULL, &tz)) {
99: perror("date: settimeofday");
100: exit(1);
101: }
102:
103: if (gettimeofday(&tv, &tz)) {
104: perror("date: gettimeofday");
105: exit(1);
106: }
107:
108: if (!argc)
109: goto display;
110:
111: if (gtime(*argv)) {
112: usage();
113: exit(1);
114: }
115:
116: if (!uflag) { /* convert to GMT assuming local time */
117: tv.tv_sec += (long)tz.tz_minuteswest * SECSPERMIN;
118: /* now fix up local daylight time */
119: if (localtime((time_t *)&tv.tv_sec)->tm_isdst)
120: tv.tv_sec -= SECSPERHOUR;
121: }
122: if (nflag || !netsettime(tv)) {
123: logwtmp("|", "date", "");
124: if (settimeofday(&tv, (struct timezone *)NULL)) {
125: perror("date: settimeofday");
126: exit(1);
127: }
128: logwtmp("{", "date", "");
129: }
130:
131: username = getlogin();
132: if (!username || *username == '\0') /* single-user or no tty */
133: username = "root";
134: syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", username);
135:
136: display:
137: if (gettimeofday(&tv, (struct timezone *)NULL)) {
138: perror("date: gettimeofday");
139: exit(1);
140: }
141: if (uflag) {
142: ap = asctime(gmtime((time_t *)&tv.tv_sec));
143: tzn = "GMT";
144: }
145: else {
146: struct tm *tp;
147:
148: tp = localtime((time_t *)&tv.tv_sec);
149: ap = asctime(tp);
150: tzn = tp->tm_zone;
151: }
152: printf("%.20s%s%s", ap, tzn, ap + 19);
153: exit(retval);
154: }
155:
156: /*
157: * gtime --
158: * convert user's time into number of seconds
159: */
160: static
161: gtime(ap)
162: register char *ap;
163: {
164: register int year, month;
165: register char *C;
166: struct tm *L;
167: int day, hour, mins, secs;
168:
169: for (secs = 0, C = ap; *C; ++C) {
170: if (*C == '.') { /* seconds provided */
171: if (strlen(C) != 3)
172: return(1);
173: *C = NULL;
174: secs = (C[1] - '0') * 10 + (C[2] - '0');
175: break;
176: }
177: if (!isdigit(*C))
178: return(-1);
179: }
180:
181: L = localtime((time_t *)&tv.tv_sec);
182: year = L->tm_year; /* defaults */
183: month = L->tm_mon + 1;
184: day = L->tm_mday;
185:
186: switch ((int)(C - ap)) { /* length */
187: case 10: /* yymmddhhmm */
188: year = ATOI2(ap);
189: case 8: /* mmddhhmm */
190: month = ATOI2(ap);
191: case 6: /* ddhhmm */
192: day = ATOI2(ap);
193: case 4: /* hhmm */
194: hour = ATOI2(ap);
195: mins = ATOI2(ap);
196: break;
197: default:
198: return(1);
199: }
200:
201: if (*ap || month < 1 || month > 12 || day < 1 || day > 31 ||
202: hour < 0 || hour > 23 || mins < 0 || mins > 59 ||
203: secs < 0 || secs > 59)
204: return(1);
205:
206: tv.tv_sec = 0;
207: year += TM_YEAR_BASE;
208: if (isleap(year) && month > 2)
209: ++tv.tv_sec;
210: for (--year;year >= EPOCH_YEAR;--year)
211: tv.tv_sec += isleap(year) ? DAYSPERLYEAR : DAYSPERNYEAR;
212: while (--month)
213: tv.tv_sec += dmsize[month];
214: tv.tv_sec += day - 1;
215: tv.tv_sec = HOURSPERDAY * tv.tv_sec + hour;
216: tv.tv_sec = MINSPERHOUR * tv.tv_sec + mins;
217: tv.tv_sec = SECSPERMIN * tv.tv_sec + secs;
218: return(0);
219: }
220:
221: #include <sys/socket.h>
222: #include <netinet/in.h>
223: #include <netdb.h>
224: #define TSPTYPES
225: #include <protocols/timed.h>
226:
227: #define WAITACK 2 /* seconds */
228: #define WAITDATEACK 5 /* seconds */
229:
230: extern int errno;
231: /*
232: * Set the date in the machines controlled by timedaemons
233: * by communicating the new date to the local timedaemon.
234: * If the timedaemon is in the master state, it performs the
235: * correction on all slaves. If it is in the slave state, it
236: * notifies the master that a correction is needed.
237: * Returns 1 on success, 0 on failure.
238: */
239: netsettime(ntv)
240: struct timeval ntv;
241: {
242: int s, length, port, timed_ack, found, err;
243: long waittime;
244: fd_set ready;
245: char hostname[MAXHOSTNAMELEN];
246: struct timeval tout;
247: struct servent *sp;
248: struct tsp msg;
249: struct sockaddr_in sin, dest, from;
250:
251: sp = getservbyname("timed", "udp");
252: if (sp == 0) {
253: fputs("udp/timed: unknown service\n", stderr);
254: retval = 2;
255: return (0);
256: }
257: dest.sin_port = sp->s_port;
258: dest.sin_family = AF_INET;
259: dest.sin_addr.s_addr = htonl((u_long)INADDR_ANY);
260: s = socket(AF_INET, SOCK_DGRAM, 0);
261: if (s < 0) {
262: if (errno != EPROTONOSUPPORT)
263: perror("date: socket");
264: goto bad;
265: }
266: bzero((char *)&sin, sizeof (sin));
267: sin.sin_family = AF_INET;
268: for (port = IPPORT_RESERVED - 1; port > IPPORT_RESERVED / 2; port--) {
269: sin.sin_port = htons((u_short)port);
270: if (bind(s, (struct sockaddr *)&sin, sizeof (sin)) >= 0)
271: break;
272: if (errno != EADDRINUSE) {
273: if (errno != EADDRNOTAVAIL)
274: perror("date: bind");
275: goto bad;
276: }
277: }
278: if (port == IPPORT_RESERVED / 2) {
279: fputs("date: All ports in use\n", stderr);
280: goto bad;
281: }
282: msg.tsp_type = TSP_SETDATE;
283: msg.tsp_vers = TSPVERSION;
284: if (gethostname(hostname, sizeof (hostname))) {
285: perror("date: gethostname");
286: goto bad;
287: }
288: (void) strncpy(msg.tsp_name, hostname, sizeof (hostname));
289: msg.tsp_seq = htons((u_short)0);
290: msg.tsp_time.tv_sec = htonl((u_long)ntv.tv_sec);
291: msg.tsp_time.tv_usec = htonl((u_long)ntv.tv_usec);
292: length = sizeof (struct sockaddr_in);
293: if (connect(s, &dest, length) < 0) {
294: perror("date: connect");
295: goto bad;
296: }
297: if (send(s, (char *)&msg, sizeof (struct tsp), 0) < 0) {
298: if (errno != ECONNREFUSED)
299: perror("date: send");
300: goto bad;
301: }
302: timed_ack = -1;
303: waittime = WAITACK;
304: loop:
305: tout.tv_sec = waittime;
306: tout.tv_usec = 0;
307: FD_ZERO(&ready);
308: FD_SET(s, &ready);
309: found = select(FD_SETSIZE, &ready, (fd_set *)0, (fd_set *)0, &tout);
310: length = sizeof(err);
311: if (getsockopt(s, SOL_SOCKET, SO_ERROR, (char *)&err, &length) == 0
312: && err) {
313: errno = err;
314: if (errno != ECONNREFUSED)
315: perror("date: send (delayed error)");
316: goto bad;
317: }
318: if (found > 0 && FD_ISSET(s, &ready)) {
319: length = sizeof (struct sockaddr_in);
320: if (recvfrom(s, (char *)&msg, sizeof (struct tsp), 0, &from,
321: &length) < 0) {
322: if (errno != ECONNREFUSED)
323: perror("date: recvfrom");
324: goto bad;
325: }
326: msg.tsp_seq = ntohs(msg.tsp_seq);
327: msg.tsp_time.tv_sec = ntohl(msg.tsp_time.tv_sec);
328: msg.tsp_time.tv_usec = ntohl(msg.tsp_time.tv_usec);
329: switch (msg.tsp_type) {
330:
331: case TSP_ACK:
332: timed_ack = TSP_ACK;
333: waittime = WAITDATEACK;
334: goto loop;
335:
336: case TSP_DATEACK:
337: (void)close(s);
338: return (1);
339:
340: default:
341: fprintf(stderr,
342: "date: Wrong ack received from timed: %s\n",
343: tsptype[msg.tsp_type]);
344: timed_ack = -1;
345: break;
346: }
347: }
348: if (timed_ack == -1)
349: fputs("date: Can't reach time daemon, time set locally.\n",
350: stderr);
351: bad:
352: (void)close(s);
353: retval = 2;
354: return (0);
355: }
356:
357: usage()
358: {
359: fputs("usage: date [-nu] [-d dst] [-t minutes_west] [yymmddhhmm[.ss]]\n", stderr);
360: }
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