-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
- * Reserved. This file contains Original Code and/or Modifications of
- * Original Code as defined in and that are subject to the Apple Public
- * Source License Version 1.0 (the 'License'). You may not use this file
- * except in compliance with the License. Please obtain a copy of the
- * License at http://www.apple.com/publicsource and read it before using
- * this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License."
- *
- * @APPLE_LICENSE_HEADER_END@
- */
/*
- * parsetime.c - parse time for at(1)
- * Copyright (C) 1993 Thomas Koenig
+ * parsetime.c - parse time for at(1)
+ * Copyright (C) 1993, 1994 Thomas Koenig
*
- * modifications for english-language times
- * Copyright (C) 1993 David Parsons
- * All rights reserved.
+ * 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
* 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 BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * 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
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* at [NOW] PLUS NUMBER MINUTES|HOURS|DAYS|WEEKS
+ * DOT ::= ':'|'.'
* /NUMBER [DOT NUMBER] [AM|PM]\ /[MONTH NUMBER [NUMBER]] \
* |NOON | |[TOMORROW] |
- * |MIDNIGHT | |NUMBER [SLASH NUMBER [SLASH NUMBER]]|
- * \TEATIME / \PLUS NUMBER MINUTES|HOURS|DAYS|WEEKS/
+ * |MIDNIGHT | |[DAY OF WEEK] |
+ * \TEATIME / |NUMBER [SLASH NUMBER [SLASH NUMBER]]|
+ * \PLUS NUMBER MINUTES|HOURS|DAYS|WEEKS/
*/
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/usr.bin/at/parsetime.c,v 1.25 2001/12/10 21:13:01 dwmalone Exp $");
+
/* System Headers */
#include <sys/types.h>
+#include <ctype.h>
+#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
+#include <tzfile.h>
#include <unistd.h>
-#include <ctype.h>
+#ifndef __FreeBSD__
+#include <getopt.h>
+#endif
/* Local headers */
#include "at.h"
#include "panic.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,
+ MINUTES, HOURS, DAYS, WEEKS, MONTHS, YEARS,
+ NUMBER, PLUS, DOT, COMMA, SLASH, ID, JUNK,
JAN, FEB, MAR, APR, MAY, JUN,
- JUL, AUG, SEP, OCT, NOV, DEC
-};
+ JUL, AUG, SEP, OCT, NOV, DEC,
+ SUN, MON, TUE, WED, THU, FRI, SAT,
+ UTC
+ };
-/*
- * parse translation table - table driven parsers can be your FRIEND!
+/* parse translation table - table driven parsers can be your FRIEND!
*/
struct {
- char *name; /* token name */
+ const char *name; /* token name */
int value; /* token id */
+ int plural; /* is this plural? */
} Specials[] = {
- { "midnight", MIDNIGHT }, /* 00:00:00 of today or tomorrow */
- { "noon", NOON }, /* 12:00:00 of today or tomorrow */
- { "teatime", TEATIME }, /* 16:00:00 of today or tomorrow */
- { "am", AM }, /* morning times for 0-12 clock */
- { "pm", PM }, /* evening times for 0-12 clock */
- { "tomorrow", TOMORROW }, /* execute 24 hours from time */
- { "today", TODAY }, /* execute today - don't advance time */
- { "now", NOW }, /* opt prefix for PLUS */
-
- { "minute", MINUTES }, /* minutes multiplier */
- { "min", MINUTES },
- { "m", MINUTES },
- { "minutes", MINUTES }, /* (pluralized) */
- { "hour", HOURS }, /* hours ... */
- { "hr", HOURS }, /* abbreviated */
- { "h", HOURS },
- { "hours", HOURS }, /* (pluralized) */
- { "day", DAYS }, /* days ... */
- { "d", DAYS },
- { "days", DAYS }, /* (pluralized) */
- { "week", WEEKS }, /* week ... */
- { "w", WEEKS },
- { "weeks", WEEKS }, /* (pluralized) */
- { "jan", JAN },
- { "feb", FEB },
- { "mar", MAR },
- { "apr", APR },
- { "may", MAY },
- { "jun", JUN },
- { "jul", JUL },
- { "aug", AUG },
- { "sep", SEP },
- { "oct", OCT },
- { "nov", NOV },
- { "dec", DEC }
+ { "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 */
+ { "minutes", MINUTES,1 }, /* (pluralized) */
+ { "hour", HOURS,0 }, /* hours ... */
+ { "hours", HOURS,1 }, /* (pluralized) */
+ { "day", DAYS,0 }, /* days ... */
+ { "days", DAYS,1 }, /* (pluralized) */
+ { "week", WEEKS,0 }, /* week ... */
+ { "weeks", WEEKS,1 }, /* (pluralized) */
+ { "month", MONTHS,0 }, /* month ... */
+ { "months", MONTHS,1 }, /* (pluralized) */
+ { "year", YEARS,0 }, /* year ... */
+ { "years", YEARS,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 },
+ { "january", JAN,0 },
+ { "february", FEB,0 },
+ { "march", MAR,0 },
+ { "april", APR,0 },
+ { "may", MAY,0 },
+ { "june", JUN,0 },
+ { "july", JUL,0 },
+ { "august", AUG,0 },
+ { "september", SEP,0 },
+ { "october", OCT,0 },
+ { "november", NOV,0 },
+ { "december", 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 },
+ { "utc", UTC, 0 },
} ;
/* File scope variables */
static int need; /* scanner - need to advance to next argument */
static char *sc_token; /* scanner - token buffer */
-static size_t sc_len; /* scanner - lenght of token buffer */
+static size_t sc_len; /* scanner - length of token buffer */
static int sc_tokid; /* scanner - token id */
-
-static char rcsid[] = "$Id: parsetime.c,v 1.1.1.2 2000/01/11 02:10:05 wsanchez Exp $";
+static int sc_tokplur; /* scanner - is token plural? */
/* Local functions */
* parse a token, checking if it's something special to us
*/
static int
-parse_token(arg)
- char *arg;
+parse_token(char *arg)
{
- int i;
+ size_t 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;
}
* init_scanner() sets up the scanner to eat arguments
*/
static void
-init_scanner(argc, argv)
- int argc;
- char **argv;
+init_scanner(int argc, char **argv)
{
scp = argv;
scc = argc;
need = 1;
sc_len = 1;
- while (--argc > 0)
- sc_len += strlen(*++argv);
+ while (argc-- > 0)
+ sc_len += strlen(*argv++);
- sc_token = (char *) malloc(sc_len);
- if (sc_token == NULL)
- panic("Insufficient virtual memory");
+ if ((sc_token = malloc(sc_len)) == NULL)
+ errx(EXIT_FAILURE, "virtual memory exhausted");
} /* init_scanner */
/*
* token() fetches a token from the input stream
*/
static int
-token()
+token(void)
{
int idx;
while (1) {
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;
+ /* 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) {
scc--;
need = 0;
}
- /*
- * eat whitespace now - if we walk off the end of the argument,
+ /* 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
*/
continue;
}
- /*
- * preserve the first character of the new token
+ /* preserve the first character of the new token
*/
sc_token[0] = *sct++;
- /*
- * then see what it is
+ /* then see what it is
*/
if (isdigit(sc_token[0])) {
while (isdigit(*sct))
sc_token[++idx] = *sct++;
sc_token[++idx] = 0;
return sc_tokid = NUMBER;
- } else if (isalpha(sc_token[0])) {
+ }
+ else if (isalpha(sc_token[0])) {
while (isalpha(*sct))
sc_token[++idx] = *sct++;
sc_token[++idx] = 0;
return sc_tokid = PLUS;
else if (sc_token[0] == '/')
return sc_tokid = SLASH;
+ else if (sc_token[0] == ',')
+ return sc_tokid = COMMA;
else
return sc_tokid = JUNK;
} /* while (1) */
* plonk() gives an appropriate error message if a token is incorrect
*/
static void
-plonk(tok)
- int tok;
+plonk(int tok)
{
panic((tok == EOF) ? "incomplete time"
: "garbled time");
* expect() gets a token and dies most horribly if it's not the token we want
*/
static void
-expect(desired)
- int desired;
+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(minutes, tm)
- 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]
+ * at [NOW] PLUS NUMBER [MINUTES|HOURS|DAYS|WEEKS|MONTHS|YEARS]
*
*/
+
static void
-plus(tm)
- struct tm *tm;
+plus(struct tm *tm)
{
int delay;
+ int expectplur;
expect(NUMBER);
delay = atoi(sc_token);
+ expectplur = (delay != 1) ? 1 : 0;
switch (token()) {
+ case YEARS:
+ tm->tm_year += delay;
+ break;
+ case MONTHS:
+ tm->tm_mon += delay;
+ break;
case WEEKS:
delay *= 7;
case DAYS:
- delay *= 24;
+ tm->tm_mday += delay;
+ break;
case HOURS:
- delay *= 60;
+ tm->tm_hour += delay;
+ break;
case MINUTES:
- dateadd(delay, tm);
- return;
+ tm->tm_min += delay;
+ break;
+ default:
+ plonk(sc_tokid);
+ break;
}
- plonk(sc_tokid);
+
+ if (expectplur != sc_tokplur)
+ warnx("pluralization is wrong");
+
+ tm->tm_isdst = -1;
+ if (mktime(tm) < 0)
+ plonk(sc_tokid);
+
} /* plus */
/*
* tod() computes the time of day
- * [NUMBER [DOT NUMBER] [AM|PM]]
+ * [NUMBER [DOT NUMBER] [AM|PM]] [UTC]
*/
static void
-tod(tm)
- struct tm *tm;
+tod(struct tm *tm)
{
int hour, minute = 0;
- int tlen;
+ 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
+ /* 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) {
if (minute > 59)
panic("garbled time");
token();
- } else if (tlen == 4) {
+ }
+ else if (tlen == 4) {
minute = hour%100;
if (minute > 59)
- panic("garbeld time");
+ panic("garbled time");
hour = hour/100;
}
- /*
- * check if an AM or PM specifier was given
+ /* check if an AM or PM specifier was given
*/
- if (sc_tokid == AM || sc_tokid == PM) {
+ switch (sc_tokid) {
+ case AM:
+ case PM:
if (hour > 12)
panic("garbled time");
- if (sc_tokid == PM)
- hour += 12;
- token();
- } else if (hour > 23)
- 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;
+ }
+ if (UTC != token())
+ break; /* else fallthrough */
+
+ case UTC:
+ hour += tm->tm_gmtoff/(60*60);
+ while (hour < 0)
+ hour += 24;
+ minute += (tm->tm_gmtoff/60);
+ while (minute < 0)
+ minute += 60;
+ tm->tm_gmtoff = 0;
+ token();
+ break;
+ default:
+ if (hour > 23)
+ panic("garbled time");
+ break;
+ }
- /*
- * if we specify an absolute time, we don't want to bump the day even
+ /* 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 minutes are the same assume tomorrow was meant
*/
- if ((sc_tokid == EOF || sc_tokid == PLUS) && tm->tm_hour > hour)
+ if ((sc_tokid == EOF || sc_tokid == PLUS) &&
+ ((tm->tm_hour > hour) || ((tm->tm_hour == hour) && (tm->tm_min >= minute)))) {
tm->tm_mday++;
+ tm->tm_wday++;
+ }
tm->tm_hour = hour;
tm->tm_min = minute;
* assign_date() assigns a date, wrapping to next year if needed
*/
static void
-assign_date(tm, mday, mon, year)
- struct tm *tm;
- long mday, mon, year;
+assign_date(struct tm *tm, long mday, long mon, long year)
{
- if (year > 99) {
- if (year > 1899)
- year -= 1900;
- else
- panic("garbled time");
+ /*
+ * Convert year into tm_year format (year - 1900).
+ * We may be given the year in 2 digit, 4 digit, or tm_year format.
+ */
+ if (year != -1) {
+ if (year >= TM_YEAR_BASE)
+ year -= TM_YEAR_BASE; /* convert from 4 digit year */
+ else if (year < 100) {
+ /* convert from 2 digit year */
+ struct tm *lt;
+ time_t now;
+
+ time(&now);
+ lt = localtime(&now);
+
+ /* Convert to tm_year assuming current century */
+ year += (lt->tm_year / 100) * 100;
+
+ if (year == lt->tm_year - 1) year++;
+ else if (year < lt->tm_year)
+ year += 100; /* must be in next century */
+ }
}
if (year < 0 &&
*
* /[<month> NUMBER [NUMBER]] \
* |[TOMORROW] |
+ * |[DAY OF WEEK] |
* |NUMBER [SLASH NUMBER [SLASH NUMBER]]|
* \PLUS NUMBER MINUTES|HOURS|DAYS|WEEKS/
*/
static void
-month(tm)
- struct tm *tm;
+month(struct tm *tm)
{
long year= (-1);
- long mday, mon;
+ long mday = 0, wday, mon;
int tlen;
switch (sc_tokid) {
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]
+ /* do month mday [,year]
*/
mon = (sc_tokid-JAN);
expect(NUMBER);
mday = atol(sc_token);
- if (token() == NUMBER) {
- year = atol(sc_token);
- token();
+ if (token() == COMMA) {
+ if (token() == NUMBER) {
+ year = atol(sc_token);
+ token();
+ }
}
assign_date(tm, mday, mon, year);
+ if (sc_tokid == PLUS)
+ plus(tm);
+ 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);
break;
case NUMBER:
- /*
- * get numeric MMDDYY, mm/dd/yy, or dd.mm.yy
+ /* get numeric MMDDYY, mm/dd/yy, or dd.mm.yy
*/
tlen = strlen(sc_token);
mon = atol(sc_token);
token();
}
- /*
- * flip months and days for european timing
+ /* flip months and days for European timing
*/
if (sep == DOT) {
int x = mday;
mday = mon;
mon = x;
}
- } else if (tlen == 6 || tlen == 8) {
+ }
+ else if (tlen == 6 || tlen == 8) {
if (tlen == 8) {
- year = (mon % 10000) - 1900;
+ year = (mon % 10000) - TM_YEAR_BASE;
mon /= 10000;
- } else {
+ }
+ else {
year = mon % 100;
mon /= 100;
}
mday = mon % 100;
mon /= 100;
- } else
+ }
+ else
panic("garbled time");
mon--;
/* Global functions */
time_t
-parsetime(argc, argv)
- int argc;
- char **argv;
+parsetime(int argc, char **argv)
{
-/*
- * Do the argument parsing, die if necessary, and return the time the job
+/* Do the argument parsing, die if necessary, and return the time the job
* should be run.
*/
time_t nowtimer, runtimer;
init_scanner(argc-optind, argv+optind);
switch (token()) {
- case NOW: /* now is optional prefix for PLUS tree */
+ case NOW:
+ if (scc < 1) {
+ return nowtimer;
+ }
+ /* now is optional prefix for PLUS tree */
expect(PLUS);
case PLUS:
plus(&runtime);
month(&runtime);
break;
- /*
- * evil coding for TEATIME|NOON|MIDNIGHT - we've initialised
+ /* 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
case NOON:
hr += 12;
case MIDNIGHT:
- if (runtime.tm_hour >= hr)
+ 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 */
+ /* FALLTHROUGH to month setting */
default:
month(&runtime);
break;
} /* ugly case statement */
expect(EOF);
- /*
- * adjust for daylight savings time
+ /* adjust for daylight savings time
*/
runtime.tm_isdst = -1;
runtimer = mktime(&runtime);
panic("garbled time");
if (nowtimer > runtimer)
- panic("Trying to travel back in time");
+ panic("trying to travel back in time");
return runtimer;
} /* parsetime */
projects / apple / system_cmds.git / blobdiff