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. 32 */ 33 34 #ifndef lint 35 static char const copyright[] = 36 "@(#) Copyright (c) 1985, 1987, 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)date.c 8.2 (Berkeley) 4/28/95"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/time.h> 50 51 #include <ctype.h> 52 #include <err.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <syslog.h> 57 #include <unistd.h> 58 #include <locale.h> 59 60 #include "extern.h" 61 #include "vary.h" 62 63 #ifndef TM_YEAR_BASE 64 #define TM_YEAR_BASE 1900 65 #endif 66 67 time_t tval; 68 int retval; 69 70 static void setthetime __P((const char *, const char *, int, int)); 71 static void badformat __P((void)); 72 static void usage __P((void)); 73 74 int logwtmp __P((char *, char *, char *)); 75 76 int 77 main(argc, argv) 78 int argc; 79 char **argv; 80 { 81 struct timezone tz; 82 int ch, rflag; 83 int jflag, nflag; 84 char *format, buf[1024]; 85 char *endptr, *fmt; 86 int set_timezone; 87 struct vary *v; 88 const struct vary *badv; 89 struct tm lt; 90 91 v = NULL; 92 fmt = NULL; 93 (void) setlocale(LC_TIME, ""); 94 tz.tz_dsttime = tz.tz_minuteswest = 0; 95 rflag = 0; 96 jflag = nflag = 0; 97 set_timezone = 0; 98 while ((ch = getopt(argc, argv, "d:f:jnr:t:uv:")) != -1) 99 switch((char)ch) { 100 case 'd': /* daylight savings time */ 101 tz.tz_dsttime = strtol(optarg, &endptr, 10) ? 1 : 0; 102 if (endptr == optarg || *endptr != '\0') 103 usage(); 104 set_timezone = 1; 105 break; 106 case 'f': 107 fmt = optarg; 108 break; 109 case 'j': 110 jflag = 1; /* don't set time */ 111 break; 112 case 'n': /* don't set network */ 113 nflag = 1; 114 break; 115 case 'r': /* user specified seconds */ 116 rflag = 1; 117 if (sscanf(optarg,"%li",&tval) != 1) 118 usage(); 119 break; 120 case 't': /* minutes west of UTC */ 121 /* error check; don't allow "PST" */ 122 tz.tz_minuteswest = strtol(optarg, &endptr, 10); 123 if (endptr == optarg || *endptr != '\0') 124 usage(); 125 set_timezone = 1; 126 break; 127 case 'u': /* do everything in UTC */ 128 (void)setenv("TZ", "UTC0", 1); 129 break; 130 case 'v': 131 v = vary_append(v, optarg); 132 break; 133 default: 134 usage(); 135 } 136 argc -= optind; 137 argv += optind; 138 139 /* 140 * If -d or -t, set the timezone or daylight savings time; this 141 * doesn't belong here; the kernel should not know about either. 142 */ 143 if (set_timezone && settimeofday((struct timeval *)NULL, &tz)) 144 err(1, "settimeofday (timezone)"); 145 146 if (!rflag && time(&tval) == -1) 147 err(1, "time"); 148 149 format = "%+"; 150 151 /* allow the operands in any order */ 152 if (*argv && **argv == '+') { 153 format = *argv + 1; 154 ++argv; 155 } 156 157 if (*argv) { 158 setthetime(fmt, *argv, jflag, nflag); 159 ++argv; 160 } else if (fmt != NULL) 161 usage(); 162 163 if (*argv && **argv == '+') 164 format = *argv + 1; 165 166 lt = *localtime(&tval); 167 badv = vary_apply(v, <); 168 if (badv) { 169 fprintf(stderr, "%s: Cannot apply date adjustment\n", 170 badv->arg); 171 vary_destroy(v); 172 usage(); 173 } 174 vary_destroy(v); 175 (void)strftime(buf, sizeof(buf), format, <); 176 (void)printf("%s\n", buf); 177 exit(retval); 178 } 179 180 #define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0')) 181 182 void 183 setthetime(fmt, p, jflag, nflag) 184 const char *fmt; 185 register const char *p; 186 int jflag, nflag; 187 { 188 register struct tm *lt; 189 struct timeval tv; 190 const char *dot, *t; 191 int century; 192 193 if (fmt != NULL) { 194 lt = localtime(&tval); 195 t = strptime(p, fmt, lt); 196 if (t == NULL) { 197 fprintf(stderr, "Failed conversion of ``%s''" 198 " using format ``%s''\n", p, fmt); 199 badformat(); 200 } else if (*t != '\0') 201 fprintf(stderr, "Warning: Ignoring %ld extraneous" 202 " characters in date string (%s)\n", 203 (long) strlen(t), t); 204 } else { 205 for (t = p, dot = NULL; *t; ++t) { 206 if (isdigit(*t)) 207 continue; 208 if (*t == '.' && dot == NULL) { 209 dot = t; 210 continue; 211 } 212 badformat(); 213 } 214 215 lt = localtime(&tval); 216 217 if (dot != NULL) { /* .ss */ 218 dot++; /* *dot++ = '\0'; */ 219 if (strlen(dot) != 2) 220 badformat(); 221 lt->tm_sec = ATOI2(dot); 222 if (lt->tm_sec > 61) 223 badformat(); 224 } else 225 lt->tm_sec = 0; 226 227 century = 0; 228 /* if p has a ".ss" field then let's pretend it's not there */ 229 switch (strlen(p) - ((dot != NULL) ? 3 : 0)) { 230 case 12: /* cc */ 231 lt->tm_year = ATOI2(p) * 100 - TM_YEAR_BASE; 232 century = 1; 233 /* FALLTHROUGH */ 234 case 10: /* yy */ 235 if (century) 236 lt->tm_year += ATOI2(p); 237 else { /* hack for 2000 ;-} */ 238 lt->tm_year = ATOI2(p); 239 if (lt->tm_year < 69) 240 lt->tm_year += 2000 - TM_YEAR_BASE; 241 else 242 lt->tm_year += 1900 - TM_YEAR_BASE; 243 } 244 /* FALLTHROUGH */ 245 case 8: /* mm */ 246 lt->tm_mon = ATOI2(p); 247 if (lt->tm_mon > 12) 248 badformat(); 249 --lt->tm_mon; /* time struct is 0 - 11 */ 250 /* FALLTHROUGH */ 251 case 6: /* dd */ 252 lt->tm_mday = ATOI2(p); 253 if (lt->tm_mday > 31) 254 badformat(); 255 /* FALLTHROUGH */ 256 case 4: /* HH */ 257 lt->tm_hour = ATOI2(p); 258 if (lt->tm_hour > 23) 259 badformat(); 260 /* FALLTHROUGH */ 261 case 2: /* MM */ 262 lt->tm_min = ATOI2(p); 263 if (lt->tm_min > 59) 264 badformat(); 265 break; 266 default: 267 badformat(); 268 } 269 } 270 271 /* Let mktime() decide whether summer time is in effect. */ 272 lt->tm_isdst = -1; 273 274 /* convert broken-down time to GMT clock time */ 275 if ((tval = mktime(lt)) == -1) 276 errx(1, "nonexistent time"); 277 278 if (!jflag) { 279 /* set the time */ 280 if (nflag || netsettime(tval)) { 281 logwtmp("|", "date", ""); 282 tv.tv_sec = tval; 283 tv.tv_usec = 0; 284 if (settimeofday(&tv, (struct timezone *)NULL)) 285 err(1, "settimeofday (timeval)"); 286 logwtmp("{", "date", ""); 287 } 288 289 if ((p = getlogin()) == NULL) 290 p = "???"; 291 syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", p); 292 } 293 } 294 295 static void 296 badformat() 297 { 298 warnx("illegal time format"); 299 usage(); 300 } 301 302 static void 303 usage() 304 { 305 (void)fprintf(stderr, "%s\n%s\n", 306 "usage: date [-jnu] [-d dst] [-r seconds] [-t west] " 307 "[-v[+|-]val[ymwdHMS]] ... ", 308 " " 309 "[-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format]"); 310 exit(1); 311 } 312