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
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 1.5 2004/03/19 17:30:59 cpressey 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 (void) 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 (void)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 (void)strftime(buf
, sizeof(buf
), format
, <
);
167 (void)printf("%s\n", buf
);
171 #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
174 setthetime(const char *fmt
, register const char *p
, int jflag
, int nflag
)
176 register struct tm
*lt
;
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 (void)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]");