1/*
2 * Copyright (c) 1985, 1987, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
31 * SUCH DAMAGE.
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54#include <syslog.h>
55#include <unistd.h>
56#include <locale.h>
57
58#include "extern.h"
59#include "vary.h"
60
61time_t tval;
62int retval, nflag;
63
64static void setthetime __P((const char *, const char *));
65static void badformat __P((void));
66static void usage __P((void));
67
68int logwtmp __P((char *, char *, char *));
69
70int
71main(argc, argv)
72 int argc;
73 char **argv;
74{
75 extern int optind;
76 extern char *optarg;
77 struct timezone tz;
78 int ch, rflag;
79 char *format, buf[1024];
80 char *endptr, *fmt;
81 int set_timezone;
82 struct vary *v;
83 const struct vary *badv;
84 struct tm lt;
85
86 v = NULL;
87 fmt = NULL;
88 (void) setlocale(LC_TIME, "");
89 tz.tz_dsttime = tz.tz_minuteswest = 0;
90 rflag = 0;
91 set_timezone = 0;
92 while ((ch = getopt(argc, argv, "d:f:nr:t:uv:")) != -1)
93 switch((char)ch) {
94 case 'd': /* daylight savings time */
95 tz.tz_dsttime = strtol(optarg, &endptr, 10) ? 1 : 0;
96 if (endptr == optarg || *endptr != '\0')
97 usage();
98 set_timezone = 1;
99 break;
100 case 'f':
101 fmt = optarg;
102 break;
103 case 'n': /* don't set network */
104 nflag = 1;
105 break;
106 case 'r': /* user specified seconds */
107 rflag = 1;
108 tval = atol(optarg);
109 break;
110 case 't': /* minutes west of GMT */
111 /* error check; don't allow "PST" */
112 tz.tz_minuteswest = strtol(optarg, &endptr, 10);
113 if (endptr == optarg || *endptr != '\0')
114 usage();
115 set_timezone = 1;
116 break;
117 case 'u': /* do everything in GMT */
118 (void)setenv("TZ", "GMT0", 1);
119 break;
120 case 'v':
121 v = vary_append(v, optarg);
122 break;
123 default:
124 usage();
125 }
126 argc -= optind;
127 argv += optind;
128
129 /*
130 * If -d or -t, set the timezone or daylight savings time; this
131 * doesn't belong here; the kernel should not know about either.
132 */
133 if (set_timezone && settimeofday((struct timeval *)NULL, &tz))
134 err(1, "settimeofday (timezone)");
135
136 if (!rflag && time(&tval) == -1)
137 err(1, "time");
138
139 format = "%+";
140
141 /* allow the operands in any order */
142 if (*argv && **argv == '+') {
143 format = *argv + 1;
144 ++argv;
145 }
146
147 if (*argv) {
148 setthetime(fmt, *argv);
149 ++argv;
150 } else if (fmt != NULL)
151 usage();
152
153 if (*argv && **argv == '+')
154 format = *argv + 1;
155
156 lt = *localtime(&tval);
157 badv = vary_apply(v, <);
158 if (badv) {
159 fprintf(stderr, "%s: Cannot apply date adjustment\n",
160 badv->arg);
161 vary_destroy(v);
162 usage();
163 }
164 vary_destroy(v);
165 (void)strftime(buf, sizeof(buf), format, <);
166 (void)printf("%s\n", buf);
167 exit(retval);
168}
169
170#define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2;
171void
172setthetime(fmt, p)
173 const char *fmt;
174 register const char *p;
175{
176 register struct tm *lt;
177 struct timeval tv;
178 const char *dot, *t;
179
180 if (fmt != NULL) {
181 lt = localtime(&tval);
182 t = strptime(p, fmt, lt);
183 if (t == NULL) {
184 fprintf(stderr, "Failed conversion of ``%s''"
185 " using format ``%s''\n", p, fmt);
186 lt = localtime(&tval);
187 return;
188 } else if (*t != '\0')
189 fprintf(stderr, "Warning: Ignoring %ld extraneous"
190 " characters in date string (%s)\n",
191 (long) strlen(t), t);
192 } else {
193 for (t = p, dot = NULL; *t; ++t) {
194 if (isdigit(*t))
195 continue;
196 if (*t == '.' && dot == NULL) {
197 dot = t;
198 continue;
199 }
200 badformat();
201 }
202
203 lt = localtime(&tval);
204
205 if (dot != NULL) { /* .ss */
206 dot++; /* *dot++ = '\0'; */
207 if (strlen(dot) != 2)
208 badformat();
209 lt->tm_sec = ATOI2(dot);
210 if (lt->tm_sec > 61)
211 badformat();
212 } else
213 lt->tm_sec = 0;
214
215 /* if p has a ".ss" field then let's pretend it's not there */
216 switch (strlen(p) - ((dot != NULL) ? 3 : 0)) {
217 case 10: /* yy */
218 lt->tm_year = ATOI2(p);
219 if (lt->tm_year < 69) /* hack for 2000 ;-} */
220 lt->tm_year += 100;
221 /* FALLTHROUGH */
222 case 8: /* mm */
223 lt->tm_mon = ATOI2(p);
224 if (lt->tm_mon > 12)
225 badformat();
226 --lt->tm_mon; /* time struct is 0 - 11 */
227 /* FALLTHROUGH */
228 case 6: /* dd */
229 lt->tm_mday = ATOI2(p);
230 if (lt->tm_mday > 31)
231 badformat();
232 /* FALLTHROUGH */
233 case 4: /* HH */
234 lt->tm_hour = ATOI2(p);
235 if (lt->tm_hour > 23)
236 badformat();
237 /* FALLTHROUGH */
238 case 2: /* MM */
239 lt->tm_min = ATOI2(p);
240 if (lt->tm_min > 59)
241 badformat();
242 break;
243 default:
244 badformat();
245 }
246 }
247
248 /* convert broken-down time to GMT clock time */
249 if ((tval = mktime(lt)) == -1)
250 errx(1, "nonexistent time");
251
252 /* set the time */
253 if (nflag || netsettime(tval)) {
254 logwtmp("|", "date", "");
255 tv.tv_sec = tval;
256 tv.tv_usec = 0;
257 if (settimeofday(&tv, (struct timezone *)NULL))
258 err(1, "settimeofday (timeval)");
259 logwtmp("{", "date", "");
260 }
261
262 if ((p = getlogin()) == NULL)
263 p = "???";
264 syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
265}
266
267static void
268badformat()
269{
270 warnx("illegal time format");
271 usage();
272}
273
274static void
275usage()
276{
277 (void)fprintf(stderr, "%s\n%s\n",
278 "usage: date [-nu] [-d dst] [-r seconds] [-t west] "
279 "[-v[+|-]val[ymwdHM]] ... ",
280 " [-f fmt date | [[[[yy]mm]dd]HH]MM[.ss]] [+format]");
281 exit(1);
282}
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