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 time_t tval; 64 int retval; 65 66 static void setthetime __P((const char *, const char *, int, int)); 67 static void badformat __P((void)); 68 static void usage __P((void)); 69 70 int logwtmp __P((char *, char *, char *)); 71 72 int 73 main(argc, argv) 74 int argc; 75 char **argv; 76 { 77 extern int optind; 78 extern char *optarg; 79 struct timezone tz; 80 int ch, rflag; 81 int jflag, nflag; 82 char *format, buf[1024]; 83 char *endptr, *fmt; 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 = 0; 95 set_timezone = 0; 96 while ((ch = getopt(argc, argv, "d:f:jnr: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': /* user specified seconds */ 114 rflag = 1; 115 tval = atol(optarg); 116 break; 117 case 't': /* minutes west of GMT */ 118 /* error check; don't allow "PST" */ 119 tz.tz_minuteswest = strtol(optarg, &endptr, 10); 120 if (endptr == optarg || *endptr != '\0') 121 usage(); 122 set_timezone = 1; 123 break; 124 case 'u': /* do everything in GMT */ 125 (void)setenv("TZ", "GMT0", 1); 126 break; 127 case 'v': 128 v = vary_append(v, optarg); 129 break; 130 default: 131 usage(); 132 } 133 argc -= optind; 134 argv += optind; 135 136 /* 137 * If -d or -t, set the timezone or daylight savings time; this 138 * doesn't belong here; the kernel should not know about either. 139 */ 140 if (set_timezone && settimeofday((struct timeval *)NULL, &tz)) 141 err(1, "settimeofday (timezone)"); 142 143 if (!rflag && time(&tval) == -1) 144 err(1, "time"); 145 146 format = "%+"; 147 148 /* allow the operands in any order */ 149 if (*argv && **argv == '+') { 150 format = *argv + 1; 151 ++argv; 152 } 153 154 if (*argv) { 155 setthetime(fmt, *argv, jflag, nflag); 156 ++argv; 157 } else if (fmt != NULL) 158 usage(); 159 160 if (*argv && **argv == '+') 161 format = *argv + 1; 162 163 lt = *localtime(&tval); 164 badv = vary_apply(v, <); 165 if (badv) { 166 fprintf(stderr, "%s: Cannot apply date adjustment\n", 167 badv->arg); 168 vary_destroy(v); 169 usage(); 170 } 171 vary_destroy(v); 172 (void)strftime(buf, sizeof(buf), format, <); 173 (void)printf("%s\n", buf); 174 exit(retval); 175 } 176 177 #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; 178 #define ATOI4(ar) ((ar)[0] - '0') * 1000 + ((ar)[1] - '0') * 100 + \ 179 ((ar)[2] - '0') * 10 + ((ar)[3] - '0'); (ar) += 4; 180 void 181 setthetime(fmt, p, jflag, nflag) 182 const char *fmt; 183 register const char *p; 184 int jflag, nflag; 185 { 186 register struct tm *lt; 187 struct timeval tv; 188 const char *dot, *t; 189 190 if (fmt != NULL) { 191 lt = localtime(&tval); 192 t = strptime(p, fmt, lt); 193 if (t == NULL) { 194 fprintf(stderr, "Failed conversion of ``%s''" 195 " using format ``%s''\n", p, fmt); 196 badformat(); 197 } else if (*t != '\0') 198 fprintf(stderr, "Warning: Ignoring %ld extraneous" 199 " characters in date string (%s)\n", 200 (long) strlen(t), t); 201 } else { 202 for (t = p, dot = NULL; *t; ++t) { 203 if (isdigit(*t)) 204 continue; 205 if (*t == '.' && dot == NULL) { 206 dot = t; 207 continue; 208 } 209 badformat(); 210 } 211 212 lt = localtime(&tval); 213 214 if (dot != NULL) { /* .ss */ 215 dot++; /* *dot++ = '\0'; */ 216 if (strlen(dot) != 2) 217 badformat(); 218 lt->tm_sec = ATOI2(dot); 219 if (lt->tm_sec > 61) 220 badformat(); 221 } else 222 lt->tm_sec = 0; 223 224 /* if p has a ".ss" field then let's pretend it's not there */ 225 switch (strlen(p) - ((dot != NULL) ? 3 : 0)) { 226 case 12: /* cc */ 227 lt->tm_year = -1900 + ATOI4(p); 228 if (lt->tm_year < 0) 229 badformat(); 230 goto year_done; 231 case 10: /* yy */ 232 lt->tm_year = ATOI2(p); 233 if (lt->tm_year < 69) /* hack for 2000 ;-} */ 234 lt->tm_year += 100; 235 year_done: /* FALLTHROUGH */ 236 case 8: /* mm */ 237 lt->tm_mon = ATOI2(p); 238 if (lt->tm_mon > 12) 239 badformat(); 240 --lt->tm_mon; /* time struct is 0 - 11 */ 241 /* FALLTHROUGH */ 242 case 6: /* dd */ 243 lt->tm_mday = ATOI2(p); 244 if (lt->tm_mday > 31) 245 badformat(); 246 /* FALLTHROUGH */ 247 case 4: /* HH */ 248 lt->tm_hour = ATOI2(p); 249 if (lt->tm_hour > 23) 250 badformat(); 251 /* FALLTHROUGH */ 252 case 2: /* MM */ 253 lt->tm_min = ATOI2(p); 254 if (lt->tm_min > 59) 255 badformat(); 256 break; 257 default: 258 badformat(); 259 } 260 } 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 } 282 283 static void 284 badformat() 285 { 286 warnx("illegal time format"); 287 usage(); 288 } 289 290 static void 291 usage() 292 { 293 (void)fprintf(stderr, "%s\n%s\n", 294 "usage: date [-nu] [-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 } 300