/* $OpenBSD: date.c,v 1.26 2003/10/15 15:58:22 mpech Exp $ */ /* $NetBSD: date.c,v 1.11 1995/09/07 06:21:05 jtc Exp $ */ /* * Copyright (c) 1985, 1987, 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include __COPYRIGHT("@(#) Copyright (c) 1985, 1987, 1988, 1993\n\ The Regents of the University of California. All rights reserved.\n"); __SCCSID("@(#)date.c 8.2 (Berkeley) 4/28/95"); __RCSID("$MirOS: src/bin/date/date.c,v 1.9 2016/01/02 21:32:56 tg Exp $"); extern const char *__progname; time_t tval; int retval; int slidetime; #ifndef TM_YEAR_BASE #define TM_YEAR_BASE 1900 #endif static void setthetime(char *); static __dead void badformat(void); static __dead void usage(void); int main(int argc, char *argv[]) { struct timezone tz; int ch, rflag; const char *format = NULL; char buf[1024]; int whatformat = 0; tz.tz_dsttime = tz.tz_minuteswest = 0; rflag = 0; while ((ch = getopt(argc, argv, "ad:nRr:ut:")) != -1) switch((char)ch) { case 'a': slidetime++; break; case 'd': /* daylight saving time */ tz.tz_dsttime = atoi(optarg) ? 1 : 0; break; case 'n': /* don't set network */ break; case 'R': /* RFC 2822 format */ whatformat |= 1; break; case 'r': /* user specified seconds */ rflag = 1; tval = atoll(optarg); break; case 'u': /* do everything in UTC */ if (setenv("TZ", "GMT0", 1) == -1) err(1, "cannot unsetenv TZ"); break; case 't': /* minutes west of GMT */ /* error check; don't allow "PST" */ if (isdigit(*optarg)) { tz.tz_minuteswest = atoi(optarg); break; } /* FALLTHROUGH */ default: usage(); } argc -= optind; argv += optind; /* * If -d or -t, set the timezone or daylight saving time; this * doesn't belong here, the kernel should not know about either. */ if ((tz.tz_minuteswest || tz.tz_dsttime) && settimeofday(NULL, &tz)) err(1, "settimeofday"); if (!rflag && time(&tval) == -1) err(1, "time"); /* allow the operands in any order */ if (*argv && **argv == '+') { if (*(*argv + 1)) { whatformat |= 2; format = *argv + 1; } ++argv; } if (*argv) { setthetime(*argv); ++argv; } if (*argv && **argv == '+') { whatformat |= 4; format = *argv + 1; } if (whatformat == 0) format = "%a %b %e %H:%M:%S %Z %Y"; else if (whatformat == 1) { format = "%a, %d %b %Y %H:%M:%S %z"; } else if (whatformat != 2 && whatformat != 4) errx(1, "more than one format specified"); strftime(buf, sizeof (buf), format, localtime(&tval)); printf("%s\n", buf); exit(retval); } #define ATOI2(ar) ((ar)[0] - '0') * 10 + ((ar)[1] - '0'); (ar) += 2; void setthetime(char *p) { struct tm *lt; struct timeval tv; char *dot, *t; const char *pc; int bigyear; int yearset = 0; for (t = p, dot = NULL; *t; ++t) { if (isdigit(*t)) continue; if (*t == '.' && dot == NULL) { dot = t; continue; } badformat(); } lt = localtime(&tval); lt->tm_isdst = -1; /* correct for DST */ if (dot != NULL) { /* .SS */ *dot++ = '\0'; if (strlen(dot) != 2) badformat(); lt->tm_sec = ATOI2(dot); if (lt->tm_sec > 61) badformat(); } else lt->tm_sec = 0; switch (strlen(p)) { case 12: /* cc */ bigyear = ATOI2(p); lt->tm_year = bigyear * 100 - TM_YEAR_BASE; yearset = 1; /* FALLTHROUGH */ case 10: /* yy */ if (yearset) { lt->tm_year += ATOI2(p); } else { lt->tm_year = ATOI2(p); if (lt->tm_year < 69) /* hack for 2000 ;-} */ lt->tm_year += (2000 - TM_YEAR_BASE); else lt->tm_year += (1900 - TM_YEAR_BASE); } /* FALLTHROUGH */ case 8: /* mm */ lt->tm_mon = ATOI2(p); if ((lt->tm_mon > 12) || !lt->tm_mon) badformat(); --lt->tm_mon; /* time struct is 0 - 11 */ /* FALLTHROUGH */ case 6: /* dd */ lt->tm_mday = ATOI2(p); if ((lt->tm_mday > 31) || !lt->tm_mday) badformat(); /* FALLTHROUGH */ case 4: /* HH */ lt->tm_hour = ATOI2(p); if (lt->tm_hour > 23) badformat(); /* FALLTHROUGH */ case 2: /* MM */ lt->tm_min = ATOI2(p); if (lt->tm_min > 59) badformat(); break; default: badformat(); } /* convert broken-down time to UTC clock time */ if ((tval = mktime(lt)) < 0) errx(1, "specified date is outside allowed range"); /* set the time */ if (slidetime) { struct timeval tv_current; if (gettimeofday(&tv_current, NULL) == -1) err(1, "Could not get local time of day"); tv.tv_sec = tval - tv_current.tv_sec; tv.tv_usec = 0; if (adjtime(&tv, NULL) == -1) errx(1, "adjtime"); } else { tv.tv_sec = tval; tv.tv_usec = 0; if (settimeofday(&tv, NULL)) err(1, "settimeofday"); } if ((pc = getlogin()) == NULL) pc = "???"; syslog(LOG_AUTH | LOG_NOTICE, "date set by %s", pc); } static void badformat(void) { warnx("illegal time format"); usage(); } static void usage(void) { fprintf(stderr, "usage:\t%s [-anRu] [-d dst] [-r seconds] [-t west] [+format]\n", __progname); fprintf(stderr, "\t [[[[[[cc]yy]mm]dd]HH]MM[.SS]]\n"); exit(1); }