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plugins/sudoers/getdate.y
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Rose
Prefer fputs over fprintf where possible
15 окт 2023, 19:28
15 окт 2023, 19:28
e095069
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%{ /* ** Originally written by Steven M. Bellovin <smb@research.att.com> while ** at the University of North Carolina at Chapel Hill. Later tweaked by ** a couple of people on Usenet. Completely overhauled by Rich $alz ** <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990; ** ** This grammar has 10 shift/reduce conflicts. ** ** This code is in the public domain and has no copyright. */ /* SUPPRESS 287 on yaccpar_sccsid *//* Unused static variable */ /* SUPPRESS 288 on yyerrlab *//* Label unused */ // PVS Studio suppression // -V::560, 592, 1037, 1042 #include <config.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #if defined(HAVE_STDINT_H) # include <stdint.h> #elif defined(HAVE_INTTYPES_H) # include <inttypes.h> #endif #include <time.h> #include <limits.h> #include <ctype.h> #include <sudo_compat.h> #define EPOCH 1970 #define HOUR(x) ((time_t)(x) * 60) #define SECSPERDAY (24L * 60L * 60L) /* ** An entry in the lexical lookup table. */ typedef struct _TABLE { const char *name; int type; time_t value; } TABLE; /* ** Daylight-savings mode: on, off, or not yet known. */ typedef enum _DSTMODE { DSTon, DSToff, DSTmaybe } DSTMODE; /* ** Meridian: am, pm, or 24-hour style. */ typedef enum _MERIDIAN { MERam, MERpm, MER24 } MERIDIAN; /* ** Global variables. We could get rid of most of these by using a good ** union as the yacc stack. (This routine was originally written before ** yacc had the %union construct.) Maybe someday; right now we only use ** the %union very rarely. */ static char *yyInput; static DSTMODE yyDSTmode; static time_t yyDayOrdinal; static time_t yyDayNumber; static int yyHaveDate; static int yyHaveDay; static int yyHaveRel; static int yyHaveTime; static int yyHaveZone; static time_t yyTimezone; static time_t yyDay; static time_t yyHour; static time_t yyMinutes; static time_t yyMonth; static time_t yySeconds; static time_t yyYear; static MERIDIAN yyMeridian; static time_t yyRelMonth; static time_t yyRelSeconds; static int yylex(void); int yyparse(void); void yyerror(const char *s); %} %union { time_t Number; enum _MERIDIAN Meridian; } %token tAGO tID tDST %token <Number> tDAY tDAYZONE tMINUTE_UNIT tMONTH tMONTH_UNIT %token <Number> tSEC_UNIT tSNUMBER tUNUMBER tZONE %token <Meridian> tMERIDIAN %type <Meridian> o_merid %% spec : /* NULL */ | spec item ; item : time { yyHaveTime++; } | zone { yyHaveZone++; } | date { yyHaveDate++; } | day { yyHaveDay++; } | rel { yyHaveRel++; } | number ; time : tUNUMBER tMERIDIAN { yyHour = $1; yyMinutes = 0; yySeconds = 0; yyMeridian = $2; } | tUNUMBER ':' tUNUMBER o_merid { yyHour = $1; yyMinutes = $3; yySeconds = 0; yyMeridian = $4; } | tUNUMBER ':' tUNUMBER tSNUMBER { yyHour = $1; yyMinutes = $3; yyMeridian = MER24; yyDSTmode = DSToff; yyTimezone = - ($4 % 100 + ($4 / 100) * 60); } | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid { yyHour = $1; yyMinutes = $3; yySeconds = $5; yyMeridian = $6; } | tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER { yyHour = $1; yyMinutes = $3; yySeconds = $5; yyMeridian = MER24; yyDSTmode = DSToff; yyTimezone = - ($6 % 100 + ($6 / 100) * 60); } ; zone : tZONE { yyTimezone = $1; yyDSTmode = DSToff; } | tDAYZONE { yyTimezone = $1; yyDSTmode = DSTon; } | tZONE tDST { yyTimezone = $1; yyDSTmode = DSTon; } ; day : tDAY { yyDayOrdinal = 1; yyDayNumber = $1; } | tDAY ',' { yyDayOrdinal = 1; yyDayNumber = $1; } | tUNUMBER tDAY { yyDayOrdinal = $1; yyDayNumber = $2; } ; date : tUNUMBER '/' tUNUMBER { yyMonth = $1; yyDay = $3; } | tUNUMBER '/' tUNUMBER '/' tUNUMBER { if ($1 >= 100) { yyYear = $1; yyMonth = $3; yyDay = $5; } else { yyMonth = $1; yyDay = $3; yyYear = $5; } } | tUNUMBER tSNUMBER tSNUMBER { /* ISO 8601 format. yyyy-mm-dd. */ yyYear = $1; yyMonth = -$2; yyDay = -$3; } | tUNUMBER tMONTH tSNUMBER { /* e.g. 17-JUN-1992. */ yyDay = $1; yyMonth = $2; yyYear = -$3; } | tMONTH tUNUMBER { yyMonth = $1; yyDay = $2; } | tMONTH tUNUMBER ',' tUNUMBER { yyMonth = $1; yyDay = $2; yyYear = $4; } | tUNUMBER tMONTH { yyMonth = $2; yyDay = $1; } | tUNUMBER tMONTH tUNUMBER { yyMonth = $2; yyDay = $1; yyYear = $3; } ; rel : relunit tAGO { yyRelSeconds = -yyRelSeconds; yyRelMonth = -yyRelMonth; } | relunit ; relunit : tUNUMBER tMINUTE_UNIT { yyRelSeconds += $1 * $2 * 60L; } | tSNUMBER tMINUTE_UNIT { yyRelSeconds += $1 * $2 * 60L; } | tMINUTE_UNIT { yyRelSeconds += $1 * 60L; } | tSNUMBER tSEC_UNIT { yyRelSeconds += $1; } | tUNUMBER tSEC_UNIT { yyRelSeconds += $1; } | tSEC_UNIT { yyRelSeconds++; } | tSNUMBER tMONTH_UNIT { yyRelMonth += $1 * $2; } | tUNUMBER tMONTH_UNIT { yyRelMonth += $1 * $2; } | tMONTH_UNIT { yyRelMonth += $1; } ; number : tUNUMBER { if (yyHaveTime && yyHaveDate && !yyHaveRel) yyYear = $1; else { if($1>10000) { yyHaveDate++; yyDay= ($1)%100; yyMonth= ($1/100)%100; yyYear = $1/10000; } else { yyHaveTime++; if ($1 < 100) { yyHour = $1; yyMinutes = 0; } else { yyHour = $1 / 100; yyMinutes = $1 % 100; } yySeconds = 0; yyMeridian = MER24; } } } ; o_merid : /* NULL */ { $$ = MER24; } | tMERIDIAN { $$ = $1; } ; %% /* Month and day table. */ static TABLE const MonthDayTable[] = { { "january", tMONTH, 1 }, { "february", tMONTH, 2 }, { "march", tMONTH, 3 }, { "april", tMONTH, 4 }, { "may", tMONTH, 5 }, { "june", tMONTH, 6 }, { "july", tMONTH, 7 }, { "august", tMONTH, 8 }, { "september", tMONTH, 9 }, { "sept", tMONTH, 9 }, { "october", tMONTH, 10 }, { "november", tMONTH, 11 }, { "december", tMONTH, 12 }, { "sunday", tDAY, 0 }, { "monday", tDAY, 1 }, { "tuesday", tDAY, 2 }, { "tues", tDAY, 2 }, { "wednesday", tDAY, 3 }, { "wednes", tDAY, 3 }, { "thursday", tDAY, 4 }, { "thur", tDAY, 4 }, { "thurs", tDAY, 4 }, { "friday", tDAY, 5 }, { "saturday", tDAY, 6 }, { NULL } }; /* Time units table. */ static TABLE const UnitsTable[] = { { "year", tMONTH_UNIT, 12 }, { "month", tMONTH_UNIT, 1 }, { "fortnight", tMINUTE_UNIT, 14 * 24 * 60 }, { "week", tMINUTE_UNIT, 7 * 24 * 60 }, { "day", tMINUTE_UNIT, 1 * 24 * 60 }, { "hour", tMINUTE_UNIT, 60 }, { "minute", tMINUTE_UNIT, 1 }, { "min", tMINUTE_UNIT, 1 }, { "second", tSEC_UNIT, 1 }, { "sec", tSEC_UNIT, 1 }, { NULL } }; /* Assorted relative-time words. */ static TABLE const OtherTable[] = { { "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 }, { "yesterday", tMINUTE_UNIT, -1 * 24 * 60 }, { "today", tMINUTE_UNIT, 0 }, { "now", tMINUTE_UNIT, 0 }, { "last", tUNUMBER, -1 }, { "this", tUNUMBER, 0 }, { "next", tUNUMBER, 2 }, { "first", tUNUMBER, 1 }, /* { "second", tUNUMBER, 2 }, */ { "third", tUNUMBER, 3 }, { "fourth", tUNUMBER, 4 }, { "fifth", tUNUMBER, 5 }, { "sixth", tUNUMBER, 6 }, { "seventh", tUNUMBER, 7 }, { "eighth", tUNUMBER, 8 }, { "ninth", tUNUMBER, 9 }, { "tenth", tUNUMBER, 10 }, { "eleventh", tUNUMBER, 11 }, { "twelfth", tUNUMBER, 12 }, { "ago", tAGO, 1 }, { NULL } }; /* The timezone table. */ /* Some of these are commented out because a time_t can't store a float. */ static TABLE const TimezoneTable[] = { { "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */ { "ut", tZONE, HOUR( 0) }, /* Universal (Coordinated) */ { "utc", tZONE, HOUR( 0) }, { "wet", tZONE, HOUR( 0) }, /* Western European */ { "bst", tDAYZONE, HOUR( 0) }, /* British Summer */ { "wat", tZONE, HOUR( 1) }, /* West Africa */ { "at", tZONE, HOUR( 2) }, /* Azores */ #if 0 /* For completeness. BST is also British Summer, and GST is * also Guam Standard. */ { "bst", tZONE, HOUR( 3) }, /* Brazil Standard */ { "gst", tZONE, HOUR( 3) }, /* Greenland Standard */ #endif #if 0 { "nft", tZONE, HOUR(3.5) }, /* Newfoundland */ { "nst", tZONE, HOUR(3.5) }, /* Newfoundland Standard */ { "ndt", tDAYZONE, HOUR(3.5) }, /* Newfoundland Daylight */ #endif { "ast", tZONE, HOUR( 4) }, /* Atlantic Standard */ { "adt", tDAYZONE, HOUR( 4) }, /* Atlantic Daylight */ { "est", tZONE, HOUR( 5) }, /* Eastern Standard */ { "edt", tDAYZONE, HOUR( 5) }, /* Eastern Daylight */ { "cst", tZONE, HOUR( 6) }, /* Central Standard */ { "cdt", tDAYZONE, HOUR( 6) }, /* Central Daylight */ { "mst", tZONE, HOUR( 7) }, /* Mountain Standard */ { "mdt", tDAYZONE, HOUR( 7) }, /* Mountain Daylight */ { "pst", tZONE, HOUR( 8) }, /* Pacific Standard */ { "pdt", tDAYZONE, HOUR( 8) }, /* Pacific Daylight */ { "yst", tZONE, HOUR( 9) }, /* Yukon Standard */ { "ydt", tDAYZONE, HOUR( 9) }, /* Yukon Daylight */ { "hst", tZONE, HOUR(10) }, /* Hawaii Standard */ { "hdt", tDAYZONE, HOUR(10) }, /* Hawaii Daylight */ { "cat", tZONE, HOUR(10) }, /* Central Alaska */ { "ahst", tZONE, HOUR(10) }, /* Alaska-Hawaii Standard */ { "nt", tZONE, HOUR(11) }, /* Nome */ { "idlw", tZONE, HOUR(12) }, /* International Date Line West */ { "cet", tZONE, -HOUR(1) }, /* Central European */ { "met", tZONE, -HOUR(1) }, /* Middle European */ { "mewt", tZONE, -HOUR(1) }, /* Middle European Winter */ { "mest", tDAYZONE, -HOUR(1) }, /* Middle European Summer */ { "swt", tZONE, -HOUR(1) }, /* Swedish Winter */ { "sst", tDAYZONE, -HOUR(1) }, /* Swedish Summer */ { "fwt", tZONE, -HOUR(1) }, /* French Winter */ { "fst", tDAYZONE, -HOUR(1) }, /* French Summer */ { "eet", tZONE, -HOUR(2) }, /* Eastern Europe, USSR Zone 1 */ { "bt", tZONE, -HOUR(3) }, /* Baghdad, USSR Zone 2 */ #if 0 { "it", tZONE, -HOUR(3.5) },/* Iran */ #endif { "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */ { "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */ #if 0 { "ist", tZONE, -HOUR(5.5) },/* Indian Standard */ #endif { "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */ #if 0 /* For completeness. NST is also Newfoundland Standard, and SST is * also Swedish Summer. */ { "nst", tZONE, -HOUR(6.5) },/* North Sumatra */ { "sst", tZONE, -HOUR(7) }, /* South Sumatra, USSR Zone 6 */ #endif /* 0 */ { "wast", tZONE, -HOUR(7) }, /* West Australian Standard */ { "wadt", tDAYZONE, -HOUR(7) }, /* West Australian Daylight */ #if 0 { "jt", tZONE, -HOUR(7.5) },/* Java (3pm in Cronusland!) */ #endif { "cct", tZONE, -HOUR(8) }, /* China Coast, USSR Zone 7 */ { "jst", tZONE, -HOUR(9) }, /* Japan Standard, USSR Zone 8 */ #if 0 { "cast", tZONE, -HOUR(9.5) },/* Central Australian Standard */ { "cadt", tDAYZONE, -HOUR(9.5) },/* Central Australian Daylight */ #endif { "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */ { "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */ { "gst", tZONE, -HOUR(10) }, /* Guam Standard, USSR Zone 9 */ { "nzt", tZONE, -HOUR(12) }, /* New Zealand */ { "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */ { "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */ { "idle", tZONE, -HOUR(12) }, /* International Date Line East */ { NULL } }; /* Military timezone table. */ static TABLE const MilitaryTable[] = { { "a", tZONE, HOUR( 1) }, { "b", tZONE, HOUR( 2) }, { "c", tZONE, HOUR( 3) }, { "d", tZONE, HOUR( 4) }, { "e", tZONE, HOUR( 5) }, { "f", tZONE, HOUR( 6) }, { "g", tZONE, HOUR( 7) }, { "h", tZONE, HOUR( 8) }, { "i", tZONE, HOUR( 9) }, { "k", tZONE, HOUR( 10) }, { "l", tZONE, HOUR( 11) }, { "m", tZONE, HOUR( 12) }, { "n", tZONE, HOUR(- 1) }, { "o", tZONE, HOUR(- 2) }, { "p", tZONE, HOUR(- 3) }, { "q", tZONE, HOUR(- 4) }, { "r", tZONE, HOUR(- 5) }, { "s", tZONE, HOUR(- 6) }, { "t", tZONE, HOUR(- 7) }, { "u", tZONE, HOUR(- 8) }, { "v", tZONE, HOUR(- 9) }, { "w", tZONE, HOUR(-10) }, { "x", tZONE, HOUR(-11) }, { "y", tZONE, HOUR(-12) }, { "z", tZONE, HOUR( 0) }, { NULL } }; /* ARGSUSED */ void yyerror(const char *s) { return; } static time_t ToSeconds(time_t Hours, time_t Minutes, time_t Seconds, MERIDIAN Meridian) { if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59) return -1; switch (Meridian) { case MER24: if (Hours < 0 || Hours > 23) return -1; return (Hours * 60L + Minutes) * 60L + Seconds; case MERam: if (Hours < 1 || Hours > 12) return -1; if (Hours == 12) Hours = 0; return (Hours * 60L + Minutes) * 60L + Seconds; case MERpm: if (Hours < 1 || Hours > 12) return -1; if (Hours == 12) Hours = 0; return ((Hours + 12) * 60L + Minutes) * 60L + Seconds; default: abort (); } /* NOTREACHED */ } /* Year is either * A negative number, which means to use its absolute value (why?) * A number from 0 to 99, which means a year from 1900 to 1999, or * The actual year (>=100). */ static time_t Convert(time_t Month, time_t Day, time_t Year, time_t Hours, time_t Minutes, time_t Seconds, MERIDIAN Meridian, DSTMODE DSTmode) { static int DaysInMonth[12] = { 31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; struct tm tm; time_t tod; time_t Julian; int i; if (Year < 0) Year = -Year; if (Year < 69) Year += 2000; else if (Year < 100) { Year += 1900; if (Year < EPOCH) Year += 100; } DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) ? 29 : 28; /* 32-bit time_t cannot represent years past 2038 */ if (Year < EPOCH || (sizeof(time_t) == sizeof(int) && Year > 2038) || Month < 1 || Month > 12 /* Lint fluff: "conversion from long may lose accuracy" */ || Day < 1 || Day > DaysInMonth[--Month]) return -1; for (Julian = Day - 1, i = 0; i < Month; i++) Julian += DaysInMonth[i]; for (i = EPOCH; i < Year; i++) Julian += 365 + (i % 4 == 0); Julian *= SECSPERDAY; Julian += yyTimezone * 60L; if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0) return -1; Julian += tod; if (DSTmode == DSTon || (DSTmode == DSTmaybe && localtime_r(&Julian, &tm) && tm.tm_isdst)) Julian -= 60 * 60; return Julian; } static time_t DSTcorrect(time_t Start, time_t Future) { struct tm start_tm; struct tm future_tm; time_t StartDay; time_t FutureDay; if (!localtime_r(&Start, &start_tm) || !localtime_r(&Future, &future_tm)) return -1; StartDay = (start_tm.tm_hour + 1) % 24; FutureDay = (future_tm.tm_hour + 1) % 24; return (Future - Start) + (StartDay - FutureDay) * 60L * 60L; } static time_t RelativeDate(time_t Start, time_t DayOrdinal, time_t DayNumber) { struct tm tm; time_t now; now = Start; if (!localtime_r(&now, &tm)) return -1; now += SECSPERDAY * ((DayNumber - tm.tm_wday + 7) % 7); now += 7 * SECSPERDAY * (DayOrdinal <= 0 ? DayOrdinal : DayOrdinal - 1); return DSTcorrect(Start, now); } static time_t RelativeMonth(time_t Start, time_t RelMonth) { struct tm tm; time_t Month; time_t Year; if (RelMonth == 0) return 0; if (!localtime_r(&Start, &tm)) return -1; Month = 12 * (tm.tm_year + 1900) + tm.tm_mon + RelMonth; Year = Month / 12; Month = Month % 12 + 1; return DSTcorrect(Start, Convert(Month, (time_t)tm.tm_mday, Year, (time_t)tm.tm_hour, (time_t)tm.tm_min, (time_t)tm.tm_sec, MER24, DSTmaybe)); } static int LookupWord(char *buff) { char *p; char *q; const TABLE *tp; int i; int abbrev; int bufflen; /* Make it lowercase. */ for (p = buff; *p; p++) { if (isupper((unsigned char)*p)) *p = (char)tolower((unsigned char)*p); } if ((bufflen = (int)(p - buff)) == 0) return '\0'; if (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0) { yylval.Meridian = MERam; return tMERIDIAN; } if (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0) { yylval.Meridian = MERpm; return tMERIDIAN; } /* See if we have an abbreviation for a month. */ if (bufflen == 3) abbrev = 1; else if (bufflen == 4 && buff[3] == '.') { abbrev = 1; buff[bufflen = 3] = '\0'; } else abbrev = 0; for (tp = MonthDayTable; tp->name; tp++) { if (abbrev) { if (strncmp(buff, tp->name, 3) == 0) { yylval.Number = tp->value; return tp->type; } } else if (strcmp(buff, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } } for (tp = TimezoneTable; tp->name; tp++) if (strcmp(buff, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } if (strcmp(buff, "dst") == 0) return tDST; for (tp = UnitsTable; tp->name; tp++) if (strcmp(buff, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } /* Strip off any plural and try the units table again. */ i = bufflen - 1; if (buff[i] == 's') { buff[i] = '\0'; for (tp = UnitsTable; tp->name; tp++) if (strcmp(buff, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } buff[i] = 's'; /* Put back for "this" in OtherTable. */ } for (tp = OtherTable; tp->name; tp++) if (strcmp(buff, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } /* Military timezones. */ if (buff[1] == '\0' && isalpha((unsigned char)*buff)) { for (tp = MilitaryTable; tp->name; tp++) if (strcmp(buff, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } } /* Drop out any periods and try the timezone table again. */ for (i = 0, p = q = buff; *q; q++) if (*q != '.') *p++ = *q; else i++; *p = '\0'; if (i) for (tp = TimezoneTable; tp->name; tp++) if (strcmp(buff, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } return tID; } static int yylex(void) { char c; char *p; char buff[20]; int Count; int sign; for ( ; ; ) { while (isspace((unsigned char)*yyInput)) yyInput++; if (isdigit((unsigned char)(c = *yyInput)) || c == '-' || c == '+') { if (c == '-' || c == '+') { sign = c == '-' ? -1 : 1; if (!isdigit((unsigned char)*++yyInput)) /* skip the '-' sign */ continue; } else sign = 0; for (yylval.Number = 0; isdigit((unsigned char)(c = *yyInput++)); ) yylval.Number = 10 * yylval.Number + c - '0'; yyInput--; if (sign < 0) yylval.Number = -yylval.Number; return sign ? tSNUMBER : tUNUMBER; } if (isalpha((unsigned char)c)) { for (p = buff; isalpha((unsigned char)(c = *yyInput++)) || c == '.'; ) if (p < &buff[sizeof buff - 1]) *p++ = c; *p = '\0'; yyInput--; return LookupWord(buff); } if (c != '(') return *yyInput++; Count = 0; do { c = *yyInput++; if (c == '\0') return c; if (c == '(') Count++; else if (c == ')') Count--; } while (Count > 0); } } #define TM_YEAR_ORIGIN 1900 /* Yield A - B, measured in seconds. */ static long difftm(struct tm *a, struct tm *b) { int ay = a->tm_year + (TM_YEAR_ORIGIN - 1); int by = b->tm_year + (TM_YEAR_ORIGIN - 1); long days = ( /* difference in day of year */ a->tm_yday - b->tm_yday /* + intervening leap days */ + ((ay >> 2) - (by >> 2)) - (ay/100 - by/100) + ((ay/100 >> 2) - (by/100 >> 2)) /* + difference in years * 365 */ + (long)(ay-by) * 365 ); return (60*(60*(24*days + (a->tm_hour - b->tm_hour)) + (a->tm_min - b->tm_min)) + (a->tm_sec - b->tm_sec)); } time_t get_date(char *p); time_t get_date(char *p) { struct tm tm, gmt; time_t Start; time_t tod; time_t now; time_t tz; yyInput = p; (void)time (&now); if (gmtime_r (&now, &gmt) == NULL) return -1; if (localtime_r (&now, &tm) == NULL) return -1; tz = difftm (&gmt, &tm) / 60; if (tm.tm_isdst) tz += 60; yyYear = tm.tm_year + 1900; yyMonth = tm.tm_mon + 1; yyDay = tm.tm_mday; yyTimezone = tz; yyDSTmode = DSTmaybe; yyHour = 0; yyMinutes = 0; yySeconds = 0; yyMeridian = MER24; yyRelSeconds = 0; yyRelMonth = 0; yyHaveDate = 0; yyHaveDay = 0; yyHaveRel = 0; yyHaveTime = 0; yyHaveZone = 0; if (yyparse() || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1) return -1; if (yyHaveDate || yyHaveTime || yyHaveDay) { Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds, yyMeridian, yyDSTmode); if (Start < 0) return -1; } else { Start = now; if (!yyHaveRel) Start -= ((tm.tm_hour * 60L + tm.tm_min) * 60L) + tm.tm_sec; } Start += yyRelSeconds; Start += RelativeMonth(Start, yyRelMonth); if (yyHaveDay && !yyHaveDate) { tod = RelativeDate(Start, yyDayOrdinal, yyDayNumber); Start += tod; } /* Have to do *something* with a legitimate -1 so it's distinguishable * from the error return value. (Alternately could set errno on error.) */ return Start == -1 ? 0 : Start; } #ifdef TEST /* ARGSUSED */ int main(int argc, char *argv[]) { char buff[128]; time_t d; (void)fputs("Enter date, or blank line to exit.\n\t> ", stdout); (void)fflush(stdout); while (fgets(buff, sizeof(buff), stdin) && buff[0]) { d = get_date(buff); if (d == -1) (void)fputs("Bad format - couldn't convert.\n\t> ", stdout); else (void)printf("%s\t> ", ctime(&d)); (void)fflush(stdout); } return 0; } #endif /* TEST */