Remove not needed void casts.
[dragonfly.git] / bin / date / date.c
CommitLineData
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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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32 *
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 $
57fed2af 36 * $DragonFly: src/bin/date/date.c,v 1.8 2004/11/07 20:54:51 eirikn Exp $
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37 */
38
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39#include <sys/param.h>
40#include <sys/time.h>
41
42#include <ctype.h>
43#include <err.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <string.h>
47#include <syslog.h>
48#include <unistd.h>
49#include <locale.h>
1c755102 50#include <libutil.h>
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51
52#include "extern.h"
53#include "vary.h"
54
55#ifndef TM_YEAR_BASE
56#define TM_YEAR_BASE 1900
57#endif
58
59time_t tval;
60int retval;
61
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62static void setthetime (const char *, const char *, int, int);
63static void badformat (void);
64static void usage (void);
984263bc 65
984263bc 66int
b5744197 67main(int argc, char **argv)
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68{
69 struct timezone tz;
70 int ch, rflag;
71 int jflag, nflag;
1c755102
CP
72 const char *format;
73 char buf[1024];
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74 char *endptr, *fmt;
75 char *tmp;
76 int set_timezone;
77 struct vary *v;
78 const struct vary *badv;
79 struct tm lt;
80
81 v = NULL;
82 fmt = NULL;
57fed2af 83 setlocale(LC_TIME, "");
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84 tz.tz_dsttime = tz.tz_minuteswest = 0;
85 rflag = 0;
86 jflag = nflag = 0;
87 set_timezone = 0;
88 while ((ch = getopt(argc, argv, "d:f:jnr:t:uv:")) != -1)
89 switch((char)ch) {
90 case 'd': /* daylight savings time */
91 tz.tz_dsttime = strtol(optarg, &endptr, 10) ? 1 : 0;
92 if (endptr == optarg || *endptr != '\0')
93 usage();
94 set_timezone = 1;
95 break;
96 case 'f':
97 fmt = optarg;
98 break;
99 case 'j':
100 jflag = 1; /* don't set time */
101 break;
102 case 'n': /* don't set network */
103 nflag = 1;
104 break;
105 case 'r': /* user specified seconds */
106 rflag = 1;
1c755102 107 tval = strtoll(optarg, &tmp, 0);
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108 if (*tmp != 0)
109 usage();
110 break;
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')
115 usage();
116 set_timezone = 1;
117 break;
118 case 'u': /* do everything in UTC */
57fed2af 119 setenv("TZ", "UTC0", 1);
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120 break;
121 case 'v':
122 v = vary_append(v, optarg);
123 break;
124 default:
125 usage();
126 }
127 argc -= optind;
128 argv += optind;
129
130 /*
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.
133 */
134 if (set_timezone && settimeofday((struct timeval *)NULL, &tz))
135 err(1, "settimeofday (timezone)");
136
137 if (!rflag && time(&tval) == -1)
138 err(1, "time");
139
140 format = "%+";
141
142 /* allow the operands in any order */
143 if (*argv && **argv == '+') {
144 format = *argv + 1;
145 ++argv;
146 }
147
148 if (*argv) {
149 setthetime(fmt, *argv, jflag, nflag);
150 ++argv;
151 } else if (fmt != NULL)
152 usage();
153
154 if (*argv && **argv == '+')
155 format = *argv + 1;
156
157 lt = *localtime(&tval);
158 badv = vary_apply(v, &lt);
159 if (badv) {
160 fprintf(stderr, "%s: Cannot apply date adjustment\n",
161 badv->arg);
162 vary_destroy(v);
163 usage();
164 }
165 vary_destroy(v);
57fed2af
EN
166 strftime(buf, sizeof(buf), format, &lt);
167 printf("%s\n", buf);
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168 exit(retval);
169}
170
171#define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
172
81438c6e 173static void
86a586bb 174setthetime(const char *fmt, const char *p, int jflag, int nflag)
984263bc 175{
86a586bb 176 struct tm *lt;
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177 struct timeval tv;
178 const char *dot, *t;
179 int century;
180
181 if (fmt != NULL) {
182 lt = localtime(&tval);
183 t = strptime(p, fmt, lt);
184 if (t == NULL) {
185 fprintf(stderr, "Failed conversion of ``%s''"
186 " using format ``%s''\n", p, fmt);
187 badformat();
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 century = 0;
216 /* if p has a ".ss" field then let's pretend it's not there */
217 switch (strlen(p) - ((dot != NULL) ? 3 : 0)) {
218 case 12: /* cc */
219 lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE;
220 century = 1;
221 /* FALLTHROUGH */
222 case 10: /* yy */
223 if (century)
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;
229 else
230 lt->tm_year += 1900 - TM_YEAR_BASE;
231 }
232 /* FALLTHROUGH */
233 case 8: /* mm */
234 lt->tm_mon = ATOI2(p);
235 if (lt->tm_mon > 12)
236 badformat();
237 --lt->tm_mon; /* time struct is 0 - 11 */
238 /* FALLTHROUGH */
239 case 6: /* dd */
240 lt->tm_mday = ATOI2(p);
241 if (lt->tm_mday > 31)
242 badformat();
243 /* FALLTHROUGH */
244 case 4: /* HH */
245 lt->tm_hour = ATOI2(p);
246 if (lt->tm_hour > 23)
247 badformat();
248 /* FALLTHROUGH */
249 case 2: /* MM */
250 lt->tm_min = ATOI2(p);
251 if (lt->tm_min > 59)
252 badformat();
253 break;
254 default:
255 badformat();
256 }
257 }
258
259 /* Let mktime() decide whether summer time is in effect. */
260 lt->tm_isdst = -1;
261
262 /* convert broken-down time to GMT clock time */
263 if ((tval = mktime(lt)) == -1)
264 errx(1, "nonexistent time");
265
266 if (!jflag) {
267 /* set the time */
268 if (nflag || netsettime(tval)) {
269 logwtmp("|", "date", "");
270 tv.tv_sec = tval;
271 tv.tv_usec = 0;
272 if (settimeofday(&tv, (struct timezone *)NULL))
273 err(1, "settimeofday (timeval)");
274 logwtmp("{", "date", "");
275 }
276
277 if ((p = getlogin()) == NULL)
278 p = "???";
279 syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p);
280 }
281}
282
283static void
b5744197 284badformat(void)
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285{
286 warnx("illegal time format");
287 usage();
288}
289
290static void
b5744197 291usage(void)
984263bc 292{
57fed2af 293 fprintf(stderr, "%s\n%s\n",
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294 "usage: date [-jnu] [-d dst] [-r seconds] [-t west] "
295 "[-v[+|-]val[ymwdHMS]] ... ",
296 " "
297 "[-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format]");
298 exit(1);
299}