2 * Copyright (c) 1985, 1987, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1985, 1987, 1988, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)date.c 8.2 (Berkeley) 4/28/95
35 * $FreeBSD: src/bin/date/date.c,v 1.32.2.6 2001/10/31 17:31:51 dillon Exp $
36 * $DragonFly: src/bin/date/date.c,v 1.10 2005/03/28 02:40:47 dillon Exp $
39 #include <sys/param.h>
56 #define TM_YEAR_BASE 1900
62 static void setthetime (const char *, const char *, int, int);
63 static void badformat (void);
64 static void usage (void);
67 main(int argc, char **argv)
78 const struct vary *badv;
83 setlocale(LC_TIME, "");
84 tz.tz_dsttime = tz.tz_minuteswest = 0;
88 while ((ch = getopt(argc, argv, "d:f:jnr:t:uv:")) != -1)
90 case 'd': /* daylight savings time */
91 tz.tz_dsttime = strtol(optarg, &endptr, 10) ? 1 : 0;
92 if (endptr == optarg || *endptr != '\0')
100 jflag = 1; /* don't set time */
102 case 'n': /* don't set network */
105 case 'r': /* user specified seconds */
107 tval = strtoll(optarg, &tmp, 0);
111 case 't': /* minutes west of UTC */
112 /* error check; don't allow "PST" */
113 tz.tz_minuteswest = strtol(optarg, &endptr, 10);
114 if (endptr == optarg || *endptr != '\0')
118 case 'u': /* do everything in UTC */
119 setenv("TZ", "UTC0", 1);
122 v = vary_append(v, optarg);
131 * If -d or -t, set the timezone or daylight savings time; this
132 * doesn't belong here; the kernel should not know about either.
134 if (set_timezone && settimeofday((struct timeval *)NULL, &tz))
135 err(1, "settimeofday (timezone)");
137 if (!rflag && time(&tval) == -1)
142 /* allow the operands in any order */
143 if (*argv && **argv == '+') {
149 setthetime(fmt, *argv, jflag, nflag);
151 } else if (fmt != NULL)
154 if (*argv && **argv == '+')
157 lt = *localtime(&tval);
158 badv = vary_apply(v, <);
160 fprintf(stderr, "%s: Cannot apply date adjustment\n",
166 strftime(buf, sizeof(buf), format, <);
171 #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
174 setthetime(const char *fmt, const char *p, int jflag, int nflag)
182 lt = localtime(&tval);
183 t = strptime(p, fmt, lt);
185 fprintf(stderr, "Failed conversion of ``%s''"
186 " using format ``%s''\n", p, fmt);
188 } else if (*t != '\0')
189 fprintf(stderr, "Warning: Ignoring %ld extraneous"
190 " characters in date string (%s)\n",
191 (long) strlen(t), t);
193 for (t = p, dot = NULL; *t; ++t) {
196 if (*t == '.' && dot == NULL) {
203 lt = localtime(&tval);
205 if (dot != NULL) { /* .ss */
206 dot++; /* *dot++ = '\0'; */
207 if (strlen(dot) != 2)
209 lt->tm_sec = ATOI2(dot);
216 /* if p has a ".ss" field then let's pretend it's not there */
217 switch (strlen(p) - ((dot != NULL) ? 3 : 0)) {
219 lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE;
224 lt->tm_year += ATOI2(p);
225 else { /* hack for 2000 ;-} */
226 lt->tm_year = ATOI2(p);
227 if (lt->tm_year < 69)
228 lt->tm_year += 2000 - TM_YEAR_BASE;
230 lt->tm_year += 1900 - TM_YEAR_BASE;
234 lt->tm_mon = ATOI2(p);
237 --lt->tm_mon; /* time struct is 0 - 11 */
240 lt->tm_mday = ATOI2(p);
241 if (lt->tm_mday > 31)
245 lt->tm_hour = ATOI2(p);
246 if (lt->tm_hour > 23)
250 lt->tm_min = ATOI2(p);
259 /* Let mktime() decide whether summer time is in effect. */
262 /* convert broken-down time to GMT clock time */
263 if ((tval = mktime(lt)) == -1)
264 errx(1, "nonexistent time");
268 if (nflag || netsettime(tval)) {
269 logwtmp("|", "date", "");
272 if (settimeofday(&tv, (struct timezone *)NULL))
273 err(1, "settimeofday (timeval)");
274 logwtmp("{", "date", "");
277 if ((p = getlogin()) == NULL)
279 syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
286 warnx("illegal time format");
293 fprintf(stderr, "%s\n%s\n",
294 "usage: date [-jnu] [-d dst] [-r seconds] [-t west] "
295 "[-v[+|-]val[ymwdHMS]] ... ",
297 "[-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format]");