Module Name: othersrc
Committed By: simonb
Date: Thu Feb 25 07:03:57 UTC 2021
Added Files:
othersrc/usr.bin/sleepto: Makefile parsetime.c parsetime.h sleepto.c
tzfile.h
Log Message:
Jared's sleepto command from Dec 2007 - sleep to an at(1) style time
specification.
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 othersrc/usr.bin/sleepto/Makefile \
othersrc/usr.bin/sleepto/parsetime.c othersrc/usr.bin/sleepto/parsetime.h \
othersrc/usr.bin/sleepto/sleepto.c othersrc/usr.bin/sleepto/tzfile.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: othersrc/usr.bin/sleepto/Makefile
diff -u /dev/null othersrc/usr.bin/sleepto/Makefile:1.1
--- /dev/null Thu Feb 25 07:03:57 2021
+++ othersrc/usr.bin/sleepto/Makefile Thu Feb 25 07:03:57 2021
@@ -0,0 +1,8 @@
+# $NetBSD: Makefile,v 1.1 2021/02/25 07:03:57 simonb Exp $
+
+PROG= sleepto
+SRCS= sleepto.c parsetime.c
+NOMAN= # defined
+WARNS?= 4
+
+.include <bsd.prog.mk>
Index: othersrc/usr.bin/sleepto/parsetime.c
diff -u /dev/null othersrc/usr.bin/sleepto/parsetime.c:1.1
--- /dev/null Thu Feb 25 07:03:57 2021
+++ othersrc/usr.bin/sleepto/parsetime.c Thu Feb 25 07:03:57 2021
@@ -0,0 +1,673 @@
+/* $NetBSD: parsetime.c,v 1.1 2021/02/25 07:03:57 simonb Exp $ */
+
+/*
+ * parsetime.c - parse time for at(1)
+ * Copyright (C) 1993, 1994 Thomas Koenig
+ *
+ * modifications for english-language times
+ * Copyright (C) 1993 David Parsons
+ *
+ * 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. The name of the author(s) may not be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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, WETHER 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.
+ *
+ * at [NOW] PLUS NUMBER MINUTES|HOURS|DAYS|WEEKS
+ * /NUMBER [DOT NUMBER] [AM|PM]\ /[MONTH NUMBER [NUMBER]] \
+ * |NOON | |[TOMORROW] |
+ * |MIDNIGHT | |[DAY OF WEEK] |
+ * \TEATIME / |NUMBER [SLASH NUMBER [SLASH NUMBER]]|
+ * \PLUS NUMBER MINUTES|HOURS|DAYS|WEEKS/
+ */
+
+/* System Headers */
+
+#include <sys/types.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <tzfile.h>
+#include <unistd.h>
+
+#include "parsetime.h"
+
+/* Structures and unions */
+
+enum { /* symbols */
+ MIDNIGHT, NOON, TEATIME,
+ PM, AM, TOMORROW, TODAY, NOW,
+ MINUTES, HOURS, DAYS, WEEKS,
+ NUMBER, PLUS, DOT, SLASH, ID, JUNK,
+ JAN, FEB, MAR, APR, MAY, JUN,
+ JUL, AUG, SEP, OCT, NOV, DEC,
+ SUN, MON, TUE, WED, THU, FRI, SAT
+};
+
+/*
+ * parse translation table - table driven parsers can be your FRIEND!
+ */
+struct {
+ const char *name; /* token name */
+ int value; /* token id */
+ int plural; /* is this plural? */
+} Specials[] = {
+ { "midnight", MIDNIGHT, 0 }, /* 00:00:00 of today or tomorrow */
+ { "noon", NOON, 0 }, /* 12:00:00 of today or tomorrow */
+ { "teatime", TEATIME, 0 }, /* 16:00:00 of today or tomorrow */
+ { "am", AM, 0 }, /* morning times for 0-12 clock */
+ { "pm", PM, 0 }, /* evening times for 0-12 clock */
+ { "tomorrow", TOMORROW, 0 }, /* execute 24 hours from time */
+ { "today", TODAY, 0 }, /* execute today - don't advance time */
+ { "now", NOW, 0 }, /* opt prefix for PLUS */
+
+ { "minute", MINUTES, 0 }, /* minutes multiplier */
+ { "min", MINUTES, 0 },
+ { "m", MINUTES, 0 },
+ { "minutes", MINUTES, 1 }, /* (pluralized) */
+ { "hour", HOURS, 0 }, /* hours ... */
+ { "hr", HOURS, 0 }, /* abbreviated */
+ { "h", HOURS, 0 },
+ { "hours", HOURS, 1 }, /* (pluralized) */
+ { "day", DAYS, 0 }, /* days ... */
+ { "d", DAYS, 0 },
+ { "days", DAYS, 1 }, /* (pluralized) */
+ { "week", WEEKS, 0 }, /* week ... */
+ { "w", WEEKS, 0 },
+ { "weeks", WEEKS, 1 }, /* (pluralized) */
+ { "jan", JAN, 0 },
+ { "feb", FEB, 0 },
+ { "mar", MAR, 0 },
+ { "apr", APR, 0 },
+ { "may", MAY, 0 },
+ { "jun", JUN, 0 },
+ { "jul", JUL, 0 },
+ { "aug", AUG, 0 },
+ { "sep", SEP, 0 },
+ { "oct", OCT, 0 },
+ { "nov", NOV, 0 },
+ { "dec", DEC, 0 },
+ { "sunday", SUN, 0 },
+ { "sun", SUN, 0 },
+ { "monday", MON, 0 },
+ { "mon", MON, 0 },
+ { "tuesday", TUE, 0 },
+ { "tue", TUE, 0 },
+ { "wednesday", WED, 0 },
+ { "wed", WED, 0 },
+ { "thursday", THU, 0 },
+ { "thu", THU, 0 },
+ { "friday", FRI, 0 },
+ { "fri", FRI, 0 },
+ { "saturday", SAT, 0 },
+ { "sat", SAT, 0 },
+};
+
+/* File scope variables */
+
+static char **scp; /* scanner - pointer at arglist */
+static char scc; /* scanner - count of remaining arguments */
+static char *sct; /* scanner - next char pointer in current argument */
+static int need; /* scanner - need to advance to next argument */
+
+static char *sc_token; /* scanner - token buffer */
+static size_t sc_len; /* scanner - length of token buffer */
+static int sc_tokid; /* scanner - token id */
+static int sc_tokplur; /* scanner - is token plural? */
+
+#ifndef lint
+#if 0
+static char rcsid[] = "$OpenBSD: parsetime.c,v 1.4 1997/03/01 23:40:10 millert Exp $";
+#else
+__RCSID("$NetBSD: parsetime.c,v 1.1 2021/02/25 07:03:57 simonb Exp $");
+#endif
+#endif
+
+/* Local functions */
+static void assign_date (struct tm *, long, long, long);
+static void dateadd (int, struct tm *);
+static void expect (int);
+static void init_scanner (int, char **);
+static void month (struct tm *);
+static int parse_token (char *);
+static void plonk (int);
+static void plus (struct tm *);
+static void tod (struct tm *);
+static int token (void);
+static void panic (const char *);
+
+static void
+panic(const char *s)
+{
+ (void)fprintf(stderr, "FATAL: %s\n", s);
+ exit (EXIT_FAILURE);
+}
+
+/*
+ * parse a token, checking if it's something special to us
+ */
+static int
+parse_token(char *arg)
+{
+ int i;
+
+ for (i=0; i < sizeof(Specials) / sizeof(Specials[0]); i++) {
+ if (strcasecmp(Specials[i].name, arg) == 0) {
+ sc_tokplur = Specials[i].plural;
+ return (sc_tokid = Specials[i].value);
+ }
+ }
+
+ /* not special - must be some random id */
+ return (ID);
+} /* parse_token */
+
+
+/*
+ * init_scanner() sets up the scanner to eat arguments
+ */
+static void
+init_scanner(int argc, char **argv)
+{
+ scp = argv;
+ scc = argc;
+ need = 1;
+ sc_len = 1;
+ while (argc-- > 0)
+ sc_len += strlen(*argv++);
+
+ if ((sc_token = (char *) malloc(sc_len)) == NULL)
+ panic("Insufficient virtual memory");
+} /* init_scanner */
+
+/*
+ * token() fetches a token from the input stream
+ */
+static int
+token(void)
+{
+ int idx;
+
+ while (1) {
+ (void)memset(sc_token, 0, sc_len);
+ sc_tokid = EOF;
+ sc_tokplur = 0;
+ idx = 0;
+
+ /*
+ * if we need to read another argument, walk along the
+ * argument list; when we fall off the arglist, we'll
+ * just return EOF forever
+ */
+ if (need) {
+ if (scc < 1)
+ return (sc_tokid);
+ sct = *scp;
+ scp++;
+ scc--;
+ need = 0;
+ }
+ /*
+ * eat whitespace now - if we walk off the end of the argument,
+ * we'll continue, which puts us up at the top of the while loop
+ * to fetch the next argument in
+ */
+ while (isspace((unsigned char)*sct))
+ ++sct;
+ if (!*sct) {
+ need = 1;
+ continue;
+ }
+
+ /*
+ * preserve the first character of the new token
+ */
+ sc_token[0] = *sct++;
+
+ /*
+ * then see what it is
+ */
+ if (isdigit((unsigned char)sc_token[0])) {
+ while (isdigit((unsigned char)*sct))
+ sc_token[++idx] = *sct++;
+ sc_token[++idx] = 0;
+ return ((sc_tokid = NUMBER));
+ } else if (isalpha((unsigned char)sc_token[0])) {
+ while (isalpha((unsigned char)*sct))
+ sc_token[++idx] = *sct++;
+ sc_token[++idx] = 0;
+ return (parse_token(sc_token));
+ }
+ else if (sc_token[0] == ':' || sc_token[0] == '.')
+ return ((sc_tokid = DOT));
+ else if (sc_token[0] == '+')
+ return ((sc_tokid = PLUS));
+ else if (sc_token[0] == '/')
+ return ((sc_tokid = SLASH));
+ else
+ return ((sc_tokid = JUNK));
+ } /* while (1) */
+} /* token */
+
+
+/*
+ * plonk() gives an appropriate error message if a token is incorrect
+ */
+static void
+plonk(int tok)
+{
+ panic((tok == EOF) ? "incomplete time" : "garbled time");
+} /* plonk */
+
+
+/*
+ * expect() gets a token and dies most horribly if it's not the token we want
+ */
+static void
+expect(int desired)
+{
+ if (token() != desired)
+ plonk(sc_tokid); /* and we die here... */
+} /* expect */
+
+
+/*
+ * dateadd() adds a number of minutes to a date. It is extraordinarily
+ * stupid regarding day-of-month overflow, and will most likely not
+ * work properly
+ */
+static void
+dateadd(int minutes, struct tm *tm)
+{
+ /* increment days */
+
+ while (minutes > 24*60) {
+ minutes -= 24*60;
+ tm->tm_mday++;
+ }
+
+ /* increment hours */
+ while (minutes > 60) {
+ minutes -= 60;
+ tm->tm_hour++;
+ if (tm->tm_hour > 23) {
+ tm->tm_mday++;
+ tm->tm_hour = 0;
+ }
+ }
+
+ /* increment minutes */
+ tm->tm_min += minutes;
+
+ if (tm->tm_min > 59) {
+ tm->tm_hour++;
+ tm->tm_min -= 60;
+
+ if (tm->tm_hour > 23) {
+ tm->tm_mday++;
+ tm->tm_hour = 0;
+ }
+ }
+} /* dateadd */
+
+
+/*
+ * plus() parses a now + time
+ *
+ * at [NOW] PLUS NUMBER [MINUTES|HOURS|DAYS|WEEKS]
+ *
+ */
+static void
+plus(struct tm *tm)
+{
+ int delay;
+ int expectplur;
+
+ expect(NUMBER);
+
+ delay = atoi(sc_token);
+ expectplur = (delay != 1) ? 1 : 0;
+
+ switch (token()) {
+ case WEEKS:
+ delay *= 7;
+ case DAYS:
+ delay *= 24;
+ case HOURS:
+ delay *= 60;
+ case MINUTES:
+ if (expectplur != sc_tokplur)
+ (void)fprintf(stderr, "at: pluralization is wrong\n");
+ dateadd(delay, tm);
+ return;
+ }
+
+ plonk(sc_tokid);
+} /* plus */
+
+
+/*
+ * tod() computes the time of day
+ * [NUMBER [DOT NUMBER] [AM|PM]]
+ */
+static void
+tod(struct tm *tm)
+{
+ int hour, minute = 0;
+ size_t tlen;
+
+ hour = atoi(sc_token);
+ tlen = strlen(sc_token);
+
+ /*
+ * first pick out the time of day - if it's 4 digits, we assume
+ * a HHMM time, otherwise it's HH DOT MM time
+ */
+ if (token() == DOT) {
+ expect(NUMBER);
+ minute = atoi(sc_token);
+ token();
+ } else if (tlen == 4) {
+ minute = hour % 100;
+ hour = hour / 100;
+ }
+
+ if (minute > 59)
+ panic("garbled time");
+
+ /*
+ * check if an AM or PM specifier was given
+ */
+ if (sc_tokid == AM || sc_tokid == PM) {
+ if (hour > 12)
+ panic("garbled time");
+
+ if (sc_tokid == PM) {
+ if (hour != 12) /* 12:xx PM is 12:xx, not 24:xx */
+ hour += 12;
+ } else {
+ if (hour == 12) /* 12:xx AM is 00:xx, not 12:xx */
+ hour = 0;
+ }
+ token();
+ } else if (hour > 23)
+ panic("garbled time");
+
+ /*
+ * if we specify an absolute time, we don't want to bump the day even
+ * if we've gone past that time - but if we're specifying a time plus
+ * a relative offset, it's okay to bump things
+ */
+ if ((sc_tokid == EOF || sc_tokid == PLUS) && tm->tm_hour > hour) {
+ tm->tm_mday++;
+ tm->tm_wday++;
+ }
+
+ tm->tm_hour = hour;
+ tm->tm_min = minute;
+} /* tod */
+
+
+/*
+ * assign_date() assigns a date, wrapping to next year if needed
+ */
+static void
+assign_date(struct tm *tm, long mday, long mon, long year)
+{
+ if (year > 99) {
+ if (year >= TM_YEAR_BASE)
+ year -= TM_YEAR_BASE;
+ else
+ panic("garbled time");
+ }
+
+ if (year >= 0) {
+ if (year < 70)
+ tm->tm_year = year + 2000 - TM_YEAR_BASE;
+ else
+ tm->tm_year = year + 1900 - TM_YEAR_BASE;
+ }
+ else { /* year < 0 */
+ if (tm->tm_mon > mon ||
+ (tm->tm_mon == mon && tm->tm_mday > mday))
+ tm->tm_year++;
+ }
+
+ tm->tm_mday = mday;
+ tm->tm_mon = mon;
+} /* assign_date */
+
+
+/*
+ * month() picks apart a month specification
+ *
+ * /[<month> NUMBER [NUMBER]] \
+ * |[TOMORROW] |
+ * |[DAY OF WEEK] |
+ * |NUMBER [SLASH NUMBER [SLASH NUMBER]]|
+ * \PLUS NUMBER MINUTES|HOURS|DAYS|WEEKS/
+ */
+static void
+month(struct tm *tm)
+{
+ int year = (-1);
+ int mday, wday, mon;
+ size_t tlen;
+
+ mday = 0;
+ switch (sc_tokid) {
+ case PLUS:
+ plus(tm);
+ break;
+
+ case TOMORROW:
+ /* do something tomorrow */
+ tm->tm_mday++;
+ tm->tm_wday++;
+ case TODAY:
+ /* force ourselves to stay in today - no further processing */
+ token();
+ break;
+
+ case JAN: case FEB: case MAR: case APR: case MAY: case JUN:
+ case JUL: case AUG: case SEP: case OCT: case NOV: case DEC:
+ /*
+ * do month mday [year]
+ */
+ mon = sc_tokid - JAN;
+ expect(NUMBER);
+ mday = atoi(sc_token);
+ if (token() == NUMBER) {
+ year = atoi(sc_token);
+ token();
+ }
+ assign_date(tm, mday, mon, year);
+ break;
+
+ case SUN: case MON: case TUE:
+ case WED: case THU: case FRI:
+ case SAT:
+ /* do a particular day of the week */
+ wday = sc_tokid - SUN;
+
+ mday = tm->tm_mday;
+
+ /* if this day is < today, then roll to next week */
+ if (wday < tm->tm_wday)
+ mday += 7 - (tm->tm_wday - wday);
+ else
+ mday += (wday - tm->tm_wday);
+
+ tm->tm_wday = wday;
+
+ assign_date(tm, mday, tm->tm_mon, tm->tm_year + TM_YEAR_BASE);
+ break;
+
+ case NUMBER:
+ /*
+ * get numeric MMDDYY, mm/dd/yy, or dd.mm.yy
+ */
+ tlen = strlen(sc_token);
+ mon = atoi(sc_token);
+ token();
+
+ if (sc_tokid == SLASH || sc_tokid == DOT) {
+ int sep;
+
+ sep = sc_tokid;
+ expect(NUMBER);
+ mday = atoi(sc_token);
+ if (token() == sep) {
+ expect(NUMBER);
+ year = atoi(sc_token);
+ token();
+ }
+
+ /*
+ * flip months and days for european timing
+ */
+ if (sep == DOT) {
+ int x = mday;
+ mday = mon;
+ mon = x;
+ }
+ } else if (tlen == 6 || tlen == 8) {
+ if (tlen == 8) {
+ year = (mon % 10000) - 1900;
+ mon /= 10000;
+ } else {
+ year = mon % 100;
+ mon /= 100;
+ }
+ mday = mon % 100;
+ mon /= 100;
+ } else
+ panic("garbled time");
+
+ mon--;
+ if (mon < 0 || mon > 11 || mday < 1 || mday > 31)
+ panic("garbled time");
+
+ assign_date(tm, mday, mon, year);
+ break;
+ } /* case */
+} /* month */
+
+
+/* Global functions */
+
+time_t
+parsetime(int argc, char **argv)
+{
+ /*
+ * Do the argument parsing, die if necessary, and return the
+ * time the job should be run.
+ */
+ time_t nowtimer, runtimer;
+ struct tm nowtime, runtime;
+ int hr = 0; /* this MUST be initialized to zero for
+ midnight/noon/teatime */
+ int fulltime = 0;
+
+ nowtimer = time(NULL);
+ nowtime = *localtime(&nowtimer);
+
+ runtime = nowtime;
+
+ if (argc <= optind)
+ panic("bad arguments");
+
+ init_scanner(argc - optind, argv + optind);
+
+ switch (token()) {
+ case NOW:
+ /* now is optional prefix for PLUS tree
+ in this case the PLUS tree is optional. */
+ switch (token()) {
+ case PLUS:
+ plus(&runtime);
+ break;
+ case EOF:
+ break;
+ default:
+ plonk(sc_tokid);
+ break;
+ }
+ fulltime = 1;
+ break;
+ case PLUS:
+ plus(&runtime);
+ break;
+
+ case NUMBER:
+ tod(&runtime);
+ month(&runtime);
+ break;
+
+ /*
+ * evil coding for TEATIME|NOON|MIDNIGHT - we've initialised
+ * hr to zero up above, then fall into this case in such a
+ * way so we add +12 +4 hours to it for teatime, +12 hours
+ * to it for noon, and nothing at all for midnight, then
+ * set our runtime to that hour before leaping into the
+ * month scanner
+ */
+ case TEATIME:
+ hr += 4;
+ case NOON:
+ hr += 12;
+ case MIDNIGHT:
+ if (runtime.tm_hour >= hr) {
+ runtime.tm_mday++;
+ runtime.tm_wday++;
+ }
+ runtime.tm_hour = hr;
+ runtime.tm_min = 0;
+ token();
+ /* fall through to month setting */
+ default:
+ month(&runtime);
+ break;
+ } /* ugly case statement */
+ expect(EOF);
+
+ if (!fulltime) {
+ runtime.tm_sec = 0;
+ runtime.tm_isdst = 0;
+ }
+
+ /*
+ * adjust for daylight savings time
+ */
+ runtime.tm_isdst = -1;
+ runtimer = mktime(&runtime);
+ if (runtime.tm_isdst > 0) {
+ runtimer -= 3600;
+ runtimer = mktime(&runtime);
+ }
+
+ if (runtimer < 0)
+ panic("Time not valid (possibly due to daylight saving time)");
+
+ if (nowtimer > runtimer)
+ panic("Trying to travel back in time");
+
+ return (runtimer);
+} /* parsetime */
Index: othersrc/usr.bin/sleepto/parsetime.h
diff -u /dev/null othersrc/usr.bin/sleepto/parsetime.h:1.1
--- /dev/null Thu Feb 25 07:03:57 2021
+++ othersrc/usr.bin/sleepto/parsetime.h Thu Feb 25 07:03:57 2021
@@ -0,0 +1 @@
+time_t parsetime(int, char **);
Index: othersrc/usr.bin/sleepto/sleepto.c
diff -u /dev/null othersrc/usr.bin/sleepto/sleepto.c:1.1
--- /dev/null Thu Feb 25 07:03:57 2021
+++ othersrc/usr.bin/sleepto/sleepto.c Thu Feb 25 07:03:57 2021
@@ -0,0 +1,44 @@
+/* $NetBSD: sleepto.c,v 1.1 2021/02/25 07:03:57 simonb Exp $ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+
+#define TIMEFMT "%R"
+
+static void usage(void);
+
+extern time_t parsetime(int, char **);
+
+int
+main(int argc, char *argv[])
+{
+ struct timeval tv;
+ time_t when, now;
+
+ if (argc < 2)
+ usage();
+ /* NOTREACHED */
+
+ if (gettimeofday(&tv, NULL) == -1) {
+ perror("gettimeofday");
+ return EXIT_FAILURE;
+ }
+
+ when = parsetime(argc, argv);
+ now = tv.tv_sec;
+
+ printf("sleeping for %ld seconds...\n", when - now);
+ sleep(when - now);
+
+ return EXIT_SUCCESS;
+}
+
+static void
+usage(void)
+{
+ (void)fprintf(stderr, "%s: usage: %s date\n",
+ getprogname(), getprogname());
+ exit(EXIT_FAILURE);
+}
Index: othersrc/usr.bin/sleepto/tzfile.h
diff -u /dev/null othersrc/usr.bin/sleepto/tzfile.h:1.1
--- /dev/null Thu Feb 25 07:03:57 2021
+++ othersrc/usr.bin/sleepto/tzfile.h Thu Feb 25 07:03:57 2021
@@ -0,0 +1,158 @@
+/* $NetBSD: tzfile.h,v 1.1 2021/02/25 07:03:57 simonb Exp $ */
+
+/*
+ * Copyright (c) 1988, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Arthur David Olson of the National Cancer Institute.
+ *
+ * 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.
+ *
+ * @(#)tzfile.h 8.1 (Berkeley) 6/2/93
+ */
+
+#ifndef _TZFILE_H_
+#define _TZFILE_H_
+
+/*
+ * Information about time zone files.
+ */
+ /* Time zone object file directory */
+#define TZDIR "/usr/share/zoneinfo"
+#define TZDEFAULT "/etc/localtime"
+#define TZDEFRULES "posixrules"
+
+/*
+** Each file begins with. . .
+*/
+
+#define TZ_MAGIC "TZif"
+
+struct tzhead {
+ char tzh_magic[4]; /* TZ_MAGIC */
+ char tzh_reserved[16]; /* reserved for future use */
+ char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */
+ char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
+ char tzh_leapcnt[4]; /* coded number of leap seconds */
+ char tzh_timecnt[4]; /* coded number of transition times */
+ char tzh_typecnt[4]; /* coded number of local time types */
+ char tzh_charcnt[4]; /* coded number of abbr. chars */
+};
+
+/*
+** . . .followed by. . .
+**
+** tzh_timecnt (char [4])s coded transition times a la time(2)
+** tzh_timecnt (unsigned char)s types of local time starting at above
+** tzh_typecnt repetitions of
+** one (char [4]) coded UTC offset in seconds
+** one (unsigned char) used to set tm_isdst
+** one (unsigned char) that's an abbreviation list index
+** tzh_charcnt (char)s '\0'-terminated zone abbreviations
+** tzh_leapcnt repetitions of
+** one (char [4]) coded leap second transition times
+** one (char [4]) total correction after above
+** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
+** time is standard time, if FALSE,
+** transition time is wall clock time
+** if absent, transition times are
+** assumed to be wall clock time
+** tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition
+** time is UTC, if FALSE,
+** transition time is wall clock time
+** if absent, transition times are
+** assumed to be local time
+*/
+
+/*
+** In the current implementation, "tzset()" refuses to deal with files that
+** exceed any of the limits below.
+*/
+
+/*
+** The TZ_MAX_TIMES value below is enough to handle a bit more than a
+** year's worth of solar time (corrected daily to the nearest second) or
+** 138 years of Pacific Presidential Election time
+** (where there are three time zone transitions every fourth year).
+*/
+#define TZ_MAX_TIMES 370
+
+#define NOSOLAR /* 4BSD doesn't currently handle solar time */
+
+#ifndef NOSOLAR
+#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
+#else
+#define TZ_MAX_TYPES 10 /* Maximum number of local time types */
+#endif
+
+#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
+
+#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
+
+#define SECSPERMIN 60
+#define MINSPERHOUR 60
+#define HOURSPERDAY 24
+#define DAYSPERWEEK 7
+#define DAYSPERNYEAR 365
+#define DAYSPERLYEAR 366
+#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
+#define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
+#define MONSPERYEAR 12
+
+#define TM_SUNDAY 0
+#define TM_MONDAY 1
+#define TM_TUESDAY 2
+#define TM_WEDNESDAY 3
+#define TM_THURSDAY 4
+#define TM_FRIDAY 5
+#define TM_SATURDAY 6
+
+#define TM_JANUARY 0
+#define TM_FEBRUARY 1
+#define TM_MARCH 2
+#define TM_APRIL 3
+#define TM_MAY 4
+#define TM_JUNE 5
+#define TM_JULY 6
+#define TM_AUGUST 7
+#define TM_SEPTEMBER 8
+#define TM_OCTOBER 9
+#define TM_NOVEMBER 10
+#define TM_DECEMBER 11
+
+#define TM_YEAR_BASE 1900
+
+#define EPOCH_YEAR 1970
+#define EPOCH_WDAY TM_THURSDAY
+
+/*
+** Accurate only for the past couple of centuries;
+** that will probably do.
+*/
+
+#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
+
+#endif /* !_TZFILE_H_ */
