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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 static char const copyright[] =
32 "@(#) Copyright (c) 1985, 1987, 1988, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)date.c 8.2 (Berkeley) 4/28/95";
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
45 #include <sys/param.h>
63 #define TM_YEAR_BASE 1900
69 static void setthetime(const char *, const char *, int, int);
70 static void badformat(void);
71 static void usage(void);
73 static const char *rfc2822_format = "%a, %d %b %Y %T %z";
76 main(int argc, char *argv[])
80 int jflag, nflag, Rflag;
87 const struct vary *badv;
93 (void) setlocale(LC_TIME, "");
94 tz.tz_dsttime = tz.tz_minuteswest = 0;
96 jflag = nflag = Rflag = 0;
98 while ((ch = getopt(argc, argv, "d:f:jnRr:t:uv:")) != -1)
100 case 'd': /* daylight savings time */
101 tz.tz_dsttime = strtol(optarg, &endptr, 10) ? 1 : 0;
102 if (endptr == optarg || *endptr != '\0')
110 jflag = 1; /* don't set time */
112 case 'n': /* don't set network */
115 case 'R': /* RFC 2822 datetime format */
118 case 'r': /* user specified seconds */
120 tval = strtoq(optarg, &tmp, 0);
122 if (stat(optarg, &sb) == 0)
123 tval = sb.st_mtim.tv_sec;
128 case 't': /* minutes west of UTC */
129 /* error check; don't allow "PST" */
130 tz.tz_minuteswest = strtol(optarg, &endptr, 10);
131 if (endptr == optarg || *endptr != '\0')
135 case 'u': /* do everything in UTC */
136 (void)setenv("TZ", "UTC0", 1);
139 v = vary_append(v, optarg);
148 * If -d or -t, set the timezone or daylight savings time; this
149 * doesn't belong here; the kernel should not know about either.
151 if (set_timezone && settimeofday(NULL, &tz) != 0)
152 err(1, "settimeofday (timezone)");
154 if (!rflag && time(&tval) == -1)
160 format = rfc2822_format;
162 /* allow the operands in any order */
163 if (*argv && **argv == '+') {
169 setthetime(fmt, *argv, jflag, nflag);
171 } else if (fmt != NULL)
174 if (*argv && **argv == '+')
177 lt = *localtime(&tval);
178 badv = vary_apply(v, <);
180 fprintf(stderr, "%s: Cannot apply date adjustment\n",
187 if (format == rfc2822_format)
189 * When using RFC 2822 datetime format, don't honor the
192 setlocale(LC_TIME, "C");
194 (void)strftime(buf, sizeof(buf), format, <);
195 (void)printf("%s\n", buf);
201 #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
204 setthetime(const char *fmt, const char *p, int jflag, int nflag)
212 lt = localtime(&tval);
213 lt->tm_isdst = -1; /* divine correct DST */
216 t = strptime(p, fmt, lt);
218 fprintf(stderr, "Failed conversion of ``%s''"
219 " using format ``%s''\n", p, fmt);
221 } else if (*t != '\0')
222 fprintf(stderr, "Warning: Ignoring %ld extraneous"
223 " characters in date string (%s)\n",
224 (long) strlen(t), t);
226 for (t = p, dot = NULL; *t; ++t) {
229 if (*t == '.' && dot == NULL) {
236 if (dot != NULL) { /* .ss */
237 dot++; /* *dot++ = '\0'; */
238 if (strlen(dot) != 2)
240 lt->tm_sec = ATOI2(dot);
247 /* if p has a ".ss" field then let's pretend it's not there */
248 switch (strlen(p) - ((dot != NULL) ? 3 : 0)) {
250 lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE;
255 lt->tm_year += ATOI2(p);
257 lt->tm_year = ATOI2(p);
258 if (lt->tm_year < 69) /* hack for 2000 ;-} */
259 lt->tm_year += 2000 - TM_YEAR_BASE;
261 lt->tm_year += 1900 - TM_YEAR_BASE;
265 lt->tm_mon = ATOI2(p);
268 --lt->tm_mon; /* time struct is 0 - 11 */
271 lt->tm_mday = ATOI2(p);
272 if (lt->tm_mday > 31)
276 lt->tm_hour = ATOI2(p);
277 if (lt->tm_hour > 23)
281 lt->tm_min = ATOI2(p);
290 /* convert broken-down time to GMT clock time */
291 if ((tval = mktime(lt)) == -1)
292 errx(1, "nonexistent time");
296 if (nflag || netsettime(tval)) {
297 utx.ut_type = OLD_TIME;
298 (void)gettimeofday(&utx.ut_tv, NULL);
302 if (settimeofday(&tv, NULL) != 0)
303 err(1, "settimeofday (timeval)");
304 utx.ut_type = NEW_TIME;
305 (void)gettimeofday(&utx.ut_tv, NULL);
309 if ((p = getlogin()) == NULL)
311 syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
318 warnx("illegal time format");
325 (void)fprintf(stderr, "%s\n%s\n",
326 "usage: date [-jnRu] [-d dst] [-r seconds] [-t west] "
327 "[-v[+|-]val[ymwdHMS]] ... ",
329 "[-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format]");