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. 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
29 * @(#) Copyright (c) 1985, 1987, 1988, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)date.c 8.2 (Berkeley) 4/28/95
31 * $FreeBSD: src/bin/date/date.c,v 1.47 2005/01/10 08:39:21 imp Exp $
34 #include <sys/param.h>
51 #define TM_YEAR_BASE 1900
57 static void setthetime(const char *, const char *, int, int);
58 static void badformat(void);
59 static void usage(void);
62 main(int argc, char **argv)
73 const struct vary *badv;
78 setlocale(LC_TIME, "");
79 tz.tz_dsttime = tz.tz_minuteswest = 0;
83 while ((ch = getopt(argc, argv, "d:f:jnr:t:uv:")) != -1)
85 case 'd': /* daylight savings time */
86 tz.tz_dsttime = strtol(optarg, &endptr, 10) ? 1 : 0;
87 if (endptr == optarg || *endptr != '\0')
95 jflag = 1; /* don't set time */
97 case 'n': /* don't set network */
100 case 'r': /* user specified seconds */
102 tval = strtoll(optarg, &tmp, 0);
106 case 't': /* minutes west of UTC */
107 /* error check; don't allow "PST" */
108 tz.tz_minuteswest = strtol(optarg, &endptr, 10);
109 if (endptr == optarg || *endptr != '\0')
113 case 'u': /* do everything in UTC */
114 if (setenv("TZ", "UTC0", 1) != 0)
115 err(1, "setenv: cannot set TZ=UTC0");
118 v = vary_append(v, optarg);
127 * If -d or -t, set the timezone or daylight savings time; this
128 * doesn't belong here; the kernel should not know about either.
130 if (set_timezone && settimeofday(NULL, &tz))
131 err(1, "settimeofday (timezone)");
133 if (!rflag && time(&tval) == -1)
138 /* allow the operands in any order */
139 if (*argv && **argv == '+') {
145 setthetime(fmt, *argv, jflag, nflag);
147 } else if (fmt != NULL)
150 if (*argv && **argv == '+')
153 lt = *localtime(&tval);
154 badv = vary_apply(v, <);
156 fprintf(stderr, "%s: Cannot apply date adjustment\n",
162 strftime(buf, sizeof(buf), format, <);
164 if (fflush(stdout) != 0)
169 #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
172 setthetime(const char *fmt, const char *p, int jflag, int nflag)
180 lt = localtime(&tval);
181 t = strptime(p, fmt, lt);
183 fprintf(stderr, "Failed conversion of ``%s''"
184 " using format ``%s''\n", p, fmt);
186 } else if (*t != '\0')
187 fprintf(stderr, "Warning: Ignoring %ld extraneous"
188 " characters in date string (%s)\n",
189 (long) strlen(t), t);
191 for (t = p, dot = NULL; *t; ++t) {
194 if (*t == '.' && dot == NULL) {
201 lt = localtime(&tval);
203 if (dot != NULL) { /* .ss */
204 dot++; /* *dot++ = '\0'; */
205 if (strlen(dot) != 2)
207 lt->tm_sec = ATOI2(dot);
214 /* if p has a ".ss" field then let's pretend it's not there */
215 switch (strlen(p) - ((dot != NULL) ? 3 : 0)) {
217 lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE;
222 lt->tm_year += ATOI2(p);
223 else { /* hack for 2000 ;-} */
224 lt->tm_year = ATOI2(p);
225 if (lt->tm_year < 69)
226 lt->tm_year += 2000 - TM_YEAR_BASE;
228 lt->tm_year += 1900 - TM_YEAR_BASE;
232 lt->tm_mon = ATOI2(p);
235 --lt->tm_mon; /* time struct is 0 - 11 */
238 lt->tm_mday = ATOI2(p);
239 if (lt->tm_mday > 31)
243 lt->tm_hour = ATOI2(p);
244 if (lt->tm_hour > 23)
248 lt->tm_min = ATOI2(p);
257 /* Let mktime() decide whether summer time is in effect. */
260 /* convert broken-down time to GMT clock time */
261 if ((tval = mktime(lt)) == -1)
262 errx(1, "nonexistent time");
266 if (nflag || netsettime(tval)) {
267 logwtmp("|", "date", "");
270 if (settimeofday(&tv, NULL))
271 err(1, "settimeofday (timeval)");
272 logwtmp("{", "date", "");
275 if ((p = getlogin()) == NULL)
277 syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
284 warnx("illegal time format");
291 fprintf(stderr, "%s\n%s\n",
292 "usage: date [-jnu] [-d dst] [-r seconds] [-t west] "
293 "[-v[+|-]val[ymwdHMS]] ... ",
295 "[-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format]");