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 * 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. 16 * 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 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 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"; 34 #endif /* not lint */ 35 36 #if 0 37 #ifndef lint 38 static char sccsid[] = "@(#)date.c 8.2 (Berkeley) 4/28/95"; 39 #endif /* not lint */ 40 #endif 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/param.h> 46 #include <sys/time.h> 47 48 #include <ctype.h> 49 #include <err.h> 50 #include <locale.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <syslog.h> 55 #include <unistd.h> 56 #include <utmpx.h> 57 58 #include "extern.h" 59 #include "vary.h" 60 61 #ifndef TM_YEAR_BASE 62 #define TM_YEAR_BASE 1900 63 #endif 64 65 static time_t tval; 66 int retval; 67 68 static void setthetime(const char *, const char *, int, int); 69 static void badformat(void); 70 static void usage(void); 71 72 static const char *rfc2822_format = "%a, %d %b %Y %T %z"; 73 74 int 75 main(int argc, char *argv[]) 76 { 77 struct timezone tz; 78 int ch, rflag; 79 int jflag, nflag, Rflag; 80 const char *format; 81 char buf[1024]; 82 char *endptr, *fmt; 83 char *tmp; 84 int set_timezone; 85 struct vary *v; 86 const struct vary *badv; 87 struct tm lt; 88 89 v = NULL; 90 fmt = NULL; 91 (void) setlocale(LC_TIME, ""); 92 tz.tz_dsttime = tz.tz_minuteswest = 0; 93 rflag = 0; 94 jflag = nflag = Rflag = 0; 95 set_timezone = 0; 96 while ((ch = getopt(argc, argv, "d:f:jnRr:t:uv:")) != -1) 97 switch((char)ch) { 98 case 'd': /* daylight savings time */ 99 tz.tz_dsttime = strtol(optarg, &endptr, 10) ? 1 : 0; 100 if (endptr == optarg || *endptr != '\0') 101 usage(); 102 set_timezone = 1; 103 break; 104 case 'f': 105 fmt = optarg; 106 break; 107 case 'j': 108 jflag = 1; /* don't set time */ 109 break; 110 case 'n': /* don't set network */ 111 nflag = 1; 112 break; 113 case 'R': /* RFC 2822 datetime format */ 114 Rflag = 1; 115 break; 116 case 'r': /* user specified seconds */ 117 rflag = 1; 118 tval = strtoq(optarg, &tmp, 0); 119 if (*tmp != 0) 120 usage(); 121 break; 122 case 't': /* minutes west of UTC */ 123 /* error check; don't allow "PST" */ 124 tz.tz_minuteswest = strtol(optarg, &endptr, 10); 125 if (endptr == optarg || *endptr != '\0') 126 usage(); 127 set_timezone = 1; 128 break; 129 case 'u': /* do everything in UTC */ 130 (void)setenv("TZ", "UTC0", 1); 131 break; 132 case 'v': 133 v = vary_append(v, optarg); 134 break; 135 default: 136 usage(); 137 } 138 argc -= optind; 139 argv += optind; 140 141 /* 142 * If -d or -t, set the timezone or daylight savings time; this 143 * doesn't belong here; the kernel should not know about either. 144 */ 145 if (set_timezone && settimeofday(NULL, &tz) != 0) 146 err(1, "settimeofday (timezone)"); 147 148 if (!rflag && time(&tval) == -1) 149 err(1, "time"); 150 151 format = "%+"; 152 153 if (Rflag) 154 format = rfc2822_format; 155 156 /* allow the operands in any order */ 157 if (*argv && **argv == '+') { 158 format = *argv + 1; 159 ++argv; 160 } 161 162 if (*argv) { 163 setthetime(fmt, *argv, jflag, nflag); 164 ++argv; 165 } else if (fmt != NULL) 166 usage(); 167 168 if (*argv && **argv == '+') 169 format = *argv + 1; 170 171 lt = *localtime(&tval); 172 badv = vary_apply(v, <); 173 if (badv) { 174 fprintf(stderr, "%s: Cannot apply date adjustment\n", 175 badv->arg); 176 vary_destroy(v); 177 usage(); 178 } 179 vary_destroy(v); 180 181 if (format == rfc2822_format) 182 /* 183 * When using RFC 2822 datetime format, don't honor the 184 * locale. 185 */ 186 setlocale(LC_TIME, "C"); 187 188 (void)strftime(buf, sizeof(buf), format, <); 189 (void)printf("%s\n", buf); 190 if (fflush(stdout)) 191 err(1, "stdout"); 192 exit(retval); 193 } 194 195 #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0')) 196 197 static void 198 setthetime(const char *fmt, const char *p, int jflag, int nflag) 199 { 200 struct utmpx utx; 201 struct tm *lt; 202 struct timeval tv; 203 const char *dot, *t; 204 int century; 205 206 lt = localtime(&tval); 207 lt->tm_isdst = -1; /* divine correct DST */ 208 209 if (fmt != NULL) { 210 t = strptime(p, fmt, lt); 211 if (t == NULL) { 212 fprintf(stderr, "Failed conversion of ``%s''" 213 " using format ``%s''\n", p, fmt); 214 badformat(); 215 } else if (*t != '\0') 216 fprintf(stderr, "Warning: Ignoring %ld extraneous" 217 " characters in date string (%s)\n", 218 (long) strlen(t), t); 219 } else { 220 for (t = p, dot = NULL; *t; ++t) { 221 if (isdigit(*t)) 222 continue; 223 if (*t == '.' && dot == NULL) { 224 dot = t; 225 continue; 226 } 227 badformat(); 228 } 229 230 if (dot != NULL) { /* .ss */ 231 dot++; /* *dot++ = '\0'; */ 232 if (strlen(dot) != 2) 233 badformat(); 234 lt->tm_sec = ATOI2(dot); 235 if (lt->tm_sec > 61) 236 badformat(); 237 } else 238 lt->tm_sec = 0; 239 240 century = 0; 241 /* if p has a ".ss" field then let's pretend it's not there */ 242 switch (strlen(p) - ((dot != NULL) ? 3 : 0)) { 243 case 12: /* cc */ 244 lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE; 245 century = 1; 246 /* FALLTHROUGH */ 247 case 10: /* yy */ 248 if (century) 249 lt->tm_year += ATOI2(p); 250 else { 251 lt->tm_year = ATOI2(p); 252 if (lt->tm_year < 69) /* hack for 2000 ;-} */ 253 lt->tm_year += 2000 - TM_YEAR_BASE; 254 else 255 lt->tm_year += 1900 - TM_YEAR_BASE; 256 } 257 /* FALLTHROUGH */ 258 case 8: /* mm */ 259 lt->tm_mon = ATOI2(p); 260 if (lt->tm_mon > 12) 261 badformat(); 262 --lt->tm_mon; /* time struct is 0 - 11 */ 263 /* FALLTHROUGH */ 264 case 6: /* dd */ 265 lt->tm_mday = ATOI2(p); 266 if (lt->tm_mday > 31) 267 badformat(); 268 /* FALLTHROUGH */ 269 case 4: /* HH */ 270 lt->tm_hour = ATOI2(p); 271 if (lt->tm_hour > 23) 272 badformat(); 273 /* FALLTHROUGH */ 274 case 2: /* MM */ 275 lt->tm_min = ATOI2(p); 276 if (lt->tm_min > 59) 277 badformat(); 278 break; 279 default: 280 badformat(); 281 } 282 } 283 284 /* convert broken-down time to GMT clock time */ 285 if ((tval = mktime(lt)) == -1) 286 errx(1, "nonexistent time"); 287 288 if (!jflag) { 289 /* set the time */ 290 if (nflag || netsettime(tval)) { 291 utx.ut_type = OLD_TIME; 292 (void)gettimeofday(&utx.ut_tv, NULL); 293 pututxline(&utx); 294 tv.tv_sec = tval; 295 tv.tv_usec = 0; 296 if (settimeofday(&tv, NULL) != 0) 297 err(1, "settimeofday (timeval)"); 298 utx.ut_type = NEW_TIME; 299 (void)gettimeofday(&utx.ut_tv, NULL); 300 pututxline(&utx); 301 } 302 303 if ((p = getlogin()) == NULL) 304 p = "???"; 305 syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p); 306 } 307 } 308 309 static void 310 badformat(void) 311 { 312 warnx("illegal time format"); 313 usage(); 314 } 315 316 static void 317 usage(void) 318 { 319 (void)fprintf(stderr, "%s\n%s\n", 320 "usage: date [-jnRu] [-d dst] [-r seconds] [-t west] " 321 "[-v[+|-]val[ymwdHMS]] ... ", 322 " " 323 "[-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format]"); 324 exit(1); 325 } 326