/* $OpenBSD: zic.c,v 1.23 2019/01/12 15:33:17 schwarze Exp $ */ /* ** This file is in the public domain, so clarified as of ** 2006-07-17 by Arthur David Olson. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "tzfile.h" #define TRUE 1 #define FALSE 0 #define TYPE_SIGNED(type) (((type) -1) < 0) #define YEARSPERREPEAT 400 /* years before a Gregorian repeat */ #define GRANDPARENTED "Local time zone must be set--see zic manual page" #define ZIC_VERSION '2' typedef int_fast64_t zic_t; #ifndef ZIC_MAX_ABBR_LEN_WO_WARN #define ZIC_MAX_ABBR_LEN_WO_WARN 6 #endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */ #define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) #define OFFSET_STRLEN_MAXIMUM (7 + INT_STRLEN_MAXIMUM(long)) #define RULE_STRLEN_MAXIMUM 8 /* "Mdd.dd.d" */ #define end(cp, n) (memchr((cp), '\0', (n))) struct rule { const char *r_filename; int r_linenum; const char *r_name; int r_loyear; /* for example, 1986 */ int r_hiyear; /* for example, 1986 */ const char *r_yrtype; int r_lowasnum; int r_hiwasnum; int r_month; /* 0..11 */ int r_dycode; /* see below */ int r_dayofmonth; int r_wday; long r_tod; /* time from midnight */ int r_todisstd; /* above is standard time if TRUE */ /* or wall clock time if FALSE */ int r_todisgmt; /* above is GMT if TRUE */ /* or local time if FALSE */ long r_stdoff; /* offset from standard time */ const char *r_abbrvar; /* variable part of abbreviation */ int r_todo; /* a rule to do (used in outzone) */ zic_t r_temp; /* used in outzone */ }; /* ** r_dycode r_dayofmonth r_wday */ #define DC_DOM 0 /* 1..31 */ /* unused */ #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */ #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */ struct zone { const char *z_filename; int z_linenum; const char *z_name; long z_gmtoff; const char *z_rule; const char *z_format; long z_stdoff; struct rule *z_rules; int z_nrules; struct rule z_untilrule; zic_t z_untiltime; }; static void addtt(zic_t starttime, int type); static int addtype(long gmtoff, const char *abbr, int isdst, int ttisstd, int ttisgmt); static void leapadd(zic_t t, int positive, int rolling, int count); static void adjleap(void); static void associate(void); static void convert(long val, char *buf); static void convert64(zic_t val, char *buf); static void dolink(const char *fromfield, const char *tofield); static void doabbr(char *abbr, size_t size, const char *format, const char *letters, int isdst, int doquotes); static void eat(const char *name, int num); static void eats(const char *name, int num, const char *rname, int rnum); static long eitol(int i); static void error(const char *message); static char **getfields(char *buf); static long gethms(const char *string, const char *errstrng, int signable); static void infile(const char *filename); static void inleap(char **fields, int nfields); static void inlink(char **fields, int nfields); static void inrule(char **fields, int nfields); static int inzcont(char **fields, int nfields); static int inzone(char **fields, int nfields); static int inzsub(char **fields, int nfields, int iscont); static int is32(zic_t x); static int itsabbr(const char *abbr, const char *word); static int itsdir(const char *name); static int mkdirs(char *filename); static void newabbr(const char *abbr); static long oadd(long t1, long t2); static void outzone(const struct zone *zp, int ntzones); static void puttzcode(long code, FILE *fp); static void puttzcode64(zic_t code, FILE *fp); static int rcomp(const void *leftp, const void *rightp); static zic_t rpytime(const struct rule *rp, int wantedy); static void rulesub(struct rule *rp, const char *loyearp, const char *hiyearp, const char *typep, const char *monthp, const char *dayp, const char *timep); static int stringoffset(char *result, size_t size, long offset); static int stringrule(char *result, size_t size, const struct rule *rp, long dstoff, long gmtoff); static void stringzone(char *result, size_t size, const struct zone *zp, int ntzones); static void setboundaries(void); static zic_t tadd(zic_t t1, long t2); static void usage(void); static void writezone(const char *name, const char *string); static int yearistype(int year, const char *type); extern char *__progname; static int charcnt; static int errors; static const char *filename; static int leapcnt; static int leapseen; static int leapminyear; static int leapmaxyear; static int linenum; static int max_abbrvar_len; static int max_format_len; static zic_t max_time; static int max_year; static zic_t min_time; static int min_year; static int noise; static const char *rfilename; static int rlinenum; static int timecnt; static int typecnt; /* ** Line codes. */ #define LC_RULE 0 #define LC_ZONE 1 #define LC_LINK 2 #define LC_LEAP 3 /* ** Which fields are which on a Zone line. */ #define ZF_NAME 1 #define ZF_GMTOFF 2 #define ZF_RULE 3 #define ZF_FORMAT 4 #define ZF_TILYEAR 5 #define ZF_TILMONTH 6 #define ZF_TILDAY 7 #define ZF_TILTIME 8 #define ZONE_MINFIELDS 5 #define ZONE_MAXFIELDS 9 /* ** Which fields are which on a Zone continuation line. */ #define ZFC_GMTOFF 0 #define ZFC_RULE 1 #define ZFC_FORMAT 2 #define ZFC_TILYEAR 3 #define ZFC_TILMONTH 4 #define ZFC_TILDAY 5 #define ZFC_TILTIME 6 #define ZONEC_MINFIELDS 3 #define ZONEC_MAXFIELDS 7 /* ** Which files are which on a Rule line. */ #define RF_NAME 1 #define RF_LOYEAR 2 #define RF_HIYEAR 3 #define RF_COMMAND 4 #define RF_MONTH 5 #define RF_DAY 6 #define RF_TOD 7 #define RF_STDOFF 8 #define RF_ABBRVAR 9 #define RULE_FIELDS 10 /* ** Which fields are which on a Link line. */ #define LF_FROM 1 #define LF_TO 2 #define LINK_FIELDS 3 /* ** Which fields are which on a Leap line. */ #define LP_YEAR 1 #define LP_MONTH 2 #define LP_DAY 3 #define LP_TIME 4 #define LP_CORR 5 #define LP_ROLL 6 #define LEAP_FIELDS 7 /* ** Year synonyms. */ #define YR_MINIMUM 0 #define YR_MAXIMUM 1 #define YR_ONLY 2 static struct rule *rules; static int nrules; /* number of rules */ static struct zone *zones; static int nzones; /* number of zones */ struct link { const char *l_filename; int l_linenum; const char *l_from; const char *l_to; }; static struct link *links; static int nlinks; struct lookup { const char *l_word; const int l_value; }; static struct lookup const *byword(const char *string, const struct lookup *lp); static struct lookup const line_codes[] = { { "Rule", LC_RULE }, { "Zone", LC_ZONE }, { "Link", LC_LINK }, { "Leap", LC_LEAP }, { NULL, 0} }; static struct lookup const mon_names[] = { { "January", TM_JANUARY }, { "February", TM_FEBRUARY }, { "March", TM_MARCH }, { "April", TM_APRIL }, { "May", TM_MAY }, { "June", TM_JUNE }, { "July", TM_JULY }, { "August", TM_AUGUST }, { "September", TM_SEPTEMBER }, { "October", TM_OCTOBER }, { "November", TM_NOVEMBER }, { "December", TM_DECEMBER }, { NULL, 0 } }; static struct lookup const wday_names[] = { { "Sunday", TM_SUNDAY }, { "Monday", TM_MONDAY }, { "Tuesday", TM_TUESDAY }, { "Wednesday", TM_WEDNESDAY }, { "Thursday", TM_THURSDAY }, { "Friday", TM_FRIDAY }, { "Saturday", TM_SATURDAY }, { NULL, 0 } }; static struct lookup const lasts[] = { { "last-Sunday", TM_SUNDAY }, { "last-Monday", TM_MONDAY }, { "last-Tuesday", TM_TUESDAY }, { "last-Wednesday", TM_WEDNESDAY }, { "last-Thursday", TM_THURSDAY }, { "last-Friday", TM_FRIDAY }, { "last-Saturday", TM_SATURDAY }, { NULL, 0 } }; static struct lookup const begin_years[] = { { "minimum", YR_MINIMUM }, { "maximum", YR_MAXIMUM }, { NULL, 0 } }; static struct lookup const end_years[] = { { "minimum", YR_MINIMUM }, { "maximum", YR_MAXIMUM }, { "only", YR_ONLY }, { NULL, 0 } }; static struct lookup const leap_types[] = { { "Rolling", TRUE }, { "Stationary", FALSE }, { NULL, 0 } }; static const int len_months[2][MONSPERYEAR] = { { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } }; static const int len_years[2] = { DAYSPERNYEAR, DAYSPERLYEAR }; static struct attype { zic_t at; unsigned char type; } attypes[TZ_MAX_TIMES]; static long gmtoffs[TZ_MAX_TYPES]; static char isdsts[TZ_MAX_TYPES]; static unsigned char abbrinds[TZ_MAX_TYPES]; static char ttisstds[TZ_MAX_TYPES]; static char ttisgmts[TZ_MAX_TYPES]; static char chars[TZ_MAX_CHARS]; static zic_t trans[TZ_MAX_LEAPS]; static long corr[TZ_MAX_LEAPS]; static char roll[TZ_MAX_LEAPS]; /* ** Memory allocation. */ static void * memcheck(void *ptr) { if (ptr == NULL) err(1, "Memory exhausted"); return ptr; } static char * ecatalloc(char *start, const char *tail) { size_t len; char *str; len = strlen(start) + strlen(tail) + 1; str = memcheck(realloc(start, len)); strlcat(str, tail, len); return str; } #define emalloc(size) memcheck(malloc(size)) #define ereallocarray(ptr, nmemb, size) memcheck(reallocarray(ptr, nmemb, size)) #define erealloc(ptr, size) memcheck(realloc((ptr), (size))) #define ecpyalloc(ptr) memcheck(strdup(ptr)) /* ** Error handling. */ static void eats(const char *name, int num, const char *rname, int rnum) { filename = name; linenum = num; rfilename = rname; rlinenum = rnum; } static void eat(const char *name, int num) { eats(name, num, NULL, -1); } static void error(const char *string) { /* ** Match the format of "cc" to allow sh users to ** zic ... 2>&1 | error -t "*" -v ** on BSD systems. */ fprintf(stderr, "\"%s\", line %d: %s", filename, linenum, string); if (rfilename != NULL) fprintf(stderr, " (rule from \"%s\", line %d)", rfilename, rlinenum); fprintf(stderr, "\n"); ++errors; } static void warning(const char *string) { char *cp; cp = ecpyalloc("warning: "); cp = ecatalloc(cp, string); error(cp); free(cp); --errors; } static const char * scheck(const char *string, const char *format) { const char *fp, *result; char *fbuf, *tp, dummy; int c; result = ""; if (string == NULL || format == NULL) return result; fbuf = reallocarray(NULL, strlen(format) + 2, 2); if (fbuf == NULL) return result; fp = format; tp = fbuf; while ((*tp++ = c = *fp++) != '\0') { if (c != '%') continue; if (*fp == '%') { *tp++ = *fp++; continue; } *tp++ = '*'; if (*fp == '*') ++fp; while (isdigit((unsigned char)*fp)) *tp++ = *fp++; if (*fp == 'l' || *fp == 'h') *tp++ = *fp++; else if (*fp == '[') do { *tp++ = *fp++; } while (*fp != '\0' && *fp != ']'); if ((*tp++ = *fp++) == '\0') break; } *(tp - 1) = '%'; *tp++ = 'c'; *tp = '\0'; if (sscanf(string, fbuf, &dummy) != 1) result = format; free(fbuf); return result; } static void usage(void) { fprintf(stderr, "usage: %s [-v] [-d directory] [-L leapsecondfilename] [-l timezone]\n" "\t\t[-p timezone] [-y command] [filename ...]\n", __progname); exit(EXIT_FAILURE); } static const char *psxrules; static const char *lcltime; static const char *directory; static const char *leapsec; static const char *yitcommand; int main(int argc, char **argv) { int i, j, c; if (pledge("stdio rpath wpath cpath proc exec", NULL) == -1) err(1, "pledge"); umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH)); while ((c = getopt(argc, argv, "d:l:p:L:vy:")) != -1) switch (c) { default: usage(); case 'd': if (directory == NULL) directory = optarg; else errx(1, "More than one -d option specified"); break; case 'l': if (lcltime == NULL) lcltime = optarg; else errx(1, "More than one -l option specified"); break; case 'p': if (psxrules == NULL) psxrules = optarg; else errx(1, "More than one -p option specified"); break; case 'y': if (yitcommand == NULL) yitcommand = optarg; else errx(1, "More than one -y option specified"); break; case 'L': if (leapsec == NULL) leapsec = optarg; else errx(1, "More than one -L option specified"); break; case 'v': noise = TRUE; break; } if (optind == argc - 1 && strcmp(argv[optind], "=") == 0) usage(); /* usage message by request */ if (directory == NULL) directory = TZDIR; if (yitcommand == NULL) yitcommand = "yearistype"; setboundaries(); if (optind < argc && leapsec != NULL) { infile(leapsec); adjleap(); } for (i = optind; i < argc; ++i) infile(argv[i]); if (errors) exit(EXIT_FAILURE); associate(); for (i = 0; i < nzones; i = j) { /* ** Find the next non-continuation zone entry. */ for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j) continue; outzone(&zones[i], j - i); } /* ** Make links. */ for (i = 0; i < nlinks; ++i) { eat(links[i].l_filename, links[i].l_linenum); dolink(links[i].l_from, links[i].l_to); if (noise) for (j = 0; j < nlinks; ++j) if (strcmp(links[i].l_to, links[j].l_from) == 0) warning("link to link"); } if (lcltime != NULL) { eat("command line", 1); dolink(lcltime, TZDEFAULT); } if (psxrules != NULL) { eat("command line", 1); dolink(psxrules, TZDEFRULES); } return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE; } static void dolink(const char *fromfield, const char *tofield) { char *fromname, *toname; if (fromfield[0] == '/') fromname = ecpyalloc(fromfield); else { fromname = ecpyalloc(directory); fromname = ecatalloc(fromname, "/"); fromname = ecatalloc(fromname, fromfield); } if (tofield[0] == '/') toname = ecpyalloc(tofield); else { toname = ecpyalloc(directory); toname = ecatalloc(toname, "/"); toname = ecatalloc(toname, tofield); } /* ** We get to be careful here since ** there's a fair chance of root running us. */ if (!itsdir(toname)) remove(toname); if (link(fromname, toname) != 0) { int result; if (mkdirs(toname) != 0) exit(EXIT_FAILURE); result = link(fromname, toname); if (result != 0 && errno == EXDEV) result = symlink(fromname, toname); if (result != 0) err(1, "Can't link from %s to %s", fromname, toname); } free(fromname); free(toname); } #define TIME_T_BITS_IN_FILE 64 static void setboundaries(void) { int i; min_time = -1; for (i = 0; i < TIME_T_BITS_IN_FILE - 1; ++i) min_time *= 2; max_time = -(min_time + 1); } static int itsdir(const char *name) { char *myname; int accres; myname = ecpyalloc(name); myname = ecatalloc(myname, "/."); accres = access(myname, F_OK); free(myname); return accres == 0; } /* ** Associate sets of rules with zones. */ /* ** Sort by rule name. */ static int rcomp(const void *cp1, const void *cp2) { return strcmp(((const struct rule *) cp1)->r_name, ((const struct rule *) cp2)->r_name); } static void associate(void) { struct zone *zp; struct rule *rp; int base, out, i, j; if (nrules != 0) { qsort(rules, nrules, sizeof *rules, rcomp); for (i = 0; i < nrules - 1; ++i) { if (strcmp(rules[i].r_name, rules[i + 1].r_name) != 0) continue; if (strcmp(rules[i].r_filename, rules[i + 1].r_filename) == 0) continue; eat(rules[i].r_filename, rules[i].r_linenum); warning("same rule name in multiple files"); eat(rules[i + 1].r_filename, rules[i + 1].r_linenum); warning("same rule name in multiple files"); for (j = i + 2; j < nrules; ++j) { if (strcmp(rules[i].r_name, rules[j].r_name) != 0) break; if (strcmp(rules[i].r_filename, rules[j].r_filename) == 0) continue; if (strcmp(rules[i + 1].r_filename, rules[j].r_filename) == 0) continue; break; } i = j - 1; } } for (i = 0; i < nzones; ++i) { zp = &zones[i]; zp->z_rules = NULL; zp->z_nrules = 0; } for (base = 0; base < nrules; base = out) { rp = &rules[base]; for (out = base + 1; out < nrules; ++out) if (strcmp(rp->r_name, rules[out].r_name) != 0) break; for (i = 0; i < nzones; ++i) { zp = &zones[i]; if (strcmp(zp->z_rule, rp->r_name) != 0) continue; zp->z_rules = rp; zp->z_nrules = out - base; } } for (i = 0; i < nzones; ++i) { zp = &zones[i]; if (zp->z_nrules == 0) { /* ** Maybe we have a local standard time offset. */ eat(zp->z_filename, zp->z_linenum); zp->z_stdoff = gethms(zp->z_rule, "unruly zone", TRUE); /* ** Note, though, that if there's no rule, ** a '%s' in the format is a bad thing. */ if (strchr(zp->z_format, '%') != 0) error("%s in ruleless zone"); } } if (errors) exit(EXIT_FAILURE); } static void infile(const char *name) { FILE *fp; char **fields, *cp; const struct lookup *lp; int nfields, wantcont, num; char buf[BUFSIZ]; if (strcmp(name, "-") == 0) { name = "standard input"; fp = stdin; } else if ((fp = fopen(name, "r")) == NULL) err(1, "Can't open %s", name); wantcont = FALSE; for (num = 1; ; ++num) { eat(name, num); if (fgets(buf, sizeof buf, fp) != buf) break; cp = strchr(buf, '\n'); if (cp == NULL) { error("line too long"); exit(EXIT_FAILURE); } *cp = '\0'; fields = getfields(buf); nfields = 0; while (fields[nfields] != NULL) { static char nada; if (strcmp(fields[nfields], "-") == 0) fields[nfields] = &nada; ++nfields; } if (nfields == 0) { /* nothing to do */ } else if (wantcont) { wantcont = inzcont(fields, nfields); } else { lp = byword(fields[0], line_codes); if (lp == NULL) error("input line of unknown type"); else switch ((int) (lp->l_value)) { case LC_RULE: inrule(fields, nfields); wantcont = FALSE; break; case LC_ZONE: wantcont = inzone(fields, nfields); break; case LC_LINK: inlink(fields, nfields); wantcont = FALSE; break; case LC_LEAP: if (name != leapsec) fprintf(stderr, "%s: Leap line in non leap seconds file %s\n", __progname, name); /* no exit? */ else inleap(fields, nfields); wantcont = FALSE; break; default: /* "cannot happen" */ errx(1, "panic: Invalid l_value %d", lp->l_value); } } free(fields); } if (ferror(fp)) errx(1, "Error reading %s", filename); if (fp != stdin && fclose(fp)) err(1, "Error closing %s", filename); if (wantcont) error("expected continuation line not found"); } /* ** Convert a string of one of the forms ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss ** into a number of seconds. ** A null string maps to zero. ** Call error with errstring and return zero on errors. */ static long gethms(const char *string, const char *errstring, int signable) { long hh; int mm, ss, sign; if (string == NULL || *string == '\0') return 0; if (!signable) sign = 1; else if (*string == '-') { sign = -1; ++string; } else sign = 1; if (sscanf(string, scheck(string, "%ld"), &hh) == 1) mm = ss = 0; else if (sscanf(string, scheck(string, "%ld:%d"), &hh, &mm) == 2) ss = 0; else if (sscanf(string, scheck(string, "%ld:%d:%d"), &hh, &mm, &ss) != 3) { error(errstring); return 0; } if (hh < 0 || mm < 0 || mm >= MINSPERHOUR || ss < 0 || ss > SECSPERMIN) { error(errstring); return 0; } if (LONG_MAX / SECSPERHOUR < hh) { error("time overflow"); return 0; } return oadd(eitol(sign) * hh * eitol(SECSPERHOUR), eitol(sign) * (eitol(mm) * eitol(SECSPERMIN) + eitol(ss))); } static void inrule(char **fields, int nfields) { static struct rule r; if (nfields != RULE_FIELDS) { error("wrong number of fields on Rule line"); return; } if (*fields[RF_NAME] == '\0') { error("nameless rule"); return; } r.r_filename = filename; r.r_linenum = linenum; r.r_stdoff = gethms(fields[RF_STDOFF], "invalid saved time", TRUE); rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND], fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]); r.r_name = ecpyalloc(fields[RF_NAME]); r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]); if (max_abbrvar_len < strlen(r.r_abbrvar)) max_abbrvar_len = strlen(r.r_abbrvar); rules = ereallocarray(rules, nrules + 1, sizeof *rules); rules[nrules++] = r; } static int inzone(char **fields, int nfields) { int i; static char *buf; size_t len; if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) { error("wrong number of fields on Zone line"); return FALSE; } if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) { len = 132 + strlen(TZDEFAULT); buf = erealloc(buf, len); snprintf(buf, len, "\"Zone %s\" line and -l option are mutually exclusive", TZDEFAULT); error(buf); return FALSE; } if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) { len = 132 + strlen(TZDEFRULES); buf = erealloc(buf, len); snprintf(buf, len, "\"Zone %s\" line and -p option are mutually exclusive", TZDEFRULES); error(buf); return FALSE; } for (i = 0; i < nzones; ++i) if (zones[i].z_name != NULL && strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) { len = 132 + strlen(fields[ZF_NAME]) + strlen(zones[i].z_filename); buf = erealloc(buf, len); snprintf(buf, len, "duplicate zone name %s (file \"%s\", line %d)", fields[ZF_NAME], zones[i].z_filename, zones[i].z_linenum); error(buf); return FALSE; } return inzsub(fields, nfields, FALSE); } static int inzcont(char **fields, int nfields) { if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) { error("wrong number of fields on Zone continuation line"); return FALSE; } return inzsub(fields, nfields, TRUE); } static int inzsub(char **fields, int nfields, int iscont) { char *cp; static struct zone z; int i_gmtoff, i_rule, i_format; int i_untilyear, i_untilmonth; int i_untilday, i_untiltime; int hasuntil; if (iscont) { i_gmtoff = ZFC_GMTOFF; i_rule = ZFC_RULE; i_format = ZFC_FORMAT; i_untilyear = ZFC_TILYEAR; i_untilmonth = ZFC_TILMONTH; i_untilday = ZFC_TILDAY; i_untiltime = ZFC_TILTIME; z.z_name = NULL; } else { i_gmtoff = ZF_GMTOFF; i_rule = ZF_RULE; i_format = ZF_FORMAT; i_untilyear = ZF_TILYEAR; i_untilmonth = ZF_TILMONTH; i_untilday = ZF_TILDAY; i_untiltime = ZF_TILTIME; z.z_name = ecpyalloc(fields[ZF_NAME]); } z.z_filename = filename; z.z_linenum = linenum; z.z_gmtoff = gethms(fields[i_gmtoff], "invalid UTC offset", TRUE); if ((cp = strchr(fields[i_format], '%')) != 0) { if (*++cp != 's' || strchr(cp, '%') != 0) { error("invalid abbreviation format"); return FALSE; } } z.z_rule = ecpyalloc(fields[i_rule]); z.z_format = ecpyalloc(fields[i_format]); if (max_format_len < strlen(z.z_format)) max_format_len = strlen(z.z_format); hasuntil = nfields > i_untilyear; if (hasuntil) { z.z_untilrule.r_filename = filename; z.z_untilrule.r_linenum = linenum; rulesub(&z.z_untilrule, fields[i_untilyear], "only", "", (nfields > i_untilmonth) ? fields[i_untilmonth] : "Jan", (nfields > i_untilday) ? fields[i_untilday] : "1", (nfields > i_untiltime) ? fields[i_untiltime] : "0"); z.z_untiltime = rpytime(&z.z_untilrule, z.z_untilrule.r_loyear); if (iscont && nzones > 0 && z.z_untiltime > min_time && z.z_untiltime < max_time && zones[nzones - 1].z_untiltime > min_time && zones[nzones - 1].z_untiltime < max_time && zones[nzones - 1].z_untiltime >= z.z_untiltime) { error("Zone continuation line end time is not after end time of previous line"); return FALSE; } } zones = ereallocarray(zones, nzones + 1, sizeof *zones); zones[nzones++] = z; /* ** If there was an UNTIL field on this line, ** there's more information about the zone on the next line. */ return hasuntil; } static void inleap(char **fields, int nfields) { const char *cp; const struct lookup *lp; int i, j; int year, month, day; long dayoff, tod; zic_t t; if (nfields != LEAP_FIELDS) { error("wrong number of fields on Leap line"); return; } dayoff = 0; cp = fields[LP_YEAR]; if (sscanf(cp, scheck(cp, "%d"), &year) != 1) { /* ** Leapin' Lizards! */ error("invalid leaping year"); return; } if (!leapseen || leapmaxyear < year) leapmaxyear = year; if (!leapseen || leapminyear > year) leapminyear = year; leapseen = TRUE; j = EPOCH_YEAR; while (j != year) { if (year > j) { i = len_years[isleap(j)]; ++j; } else { --j; i = -len_years[isleap(j)]; } dayoff = oadd(dayoff, eitol(i)); } if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) { error("invalid month name"); return; } month = lp->l_value; j = TM_JANUARY; while (j != month) { i = len_months[isleap(year)][j]; dayoff = oadd(dayoff, eitol(i)); ++j; } cp = fields[LP_DAY]; if (sscanf(cp, scheck(cp, "%d"), &day) != 1 || day <= 0 || day > len_months[isleap(year)][month]) { error("invalid day of month"); return; } dayoff = oadd(dayoff, eitol(day - 1)); if (dayoff < 0 && !TYPE_SIGNED(zic_t)) { error("time before zero"); return; } if (dayoff < min_time / SECSPERDAY) { error("time too small"); return; } if (dayoff > max_time / SECSPERDAY) { error("time too large"); return; } t = (zic_t) dayoff * SECSPERDAY; tod = gethms(fields[LP_TIME], "invalid time of day", FALSE); cp = fields[LP_CORR]; { int positive; int count; if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */ positive = FALSE; count = 1; } else if (strcmp(cp, "--") == 0) { positive = FALSE; count = 2; } else if (strcmp(cp, "+") == 0) { positive = TRUE; count = 1; } else if (strcmp(cp, "++") == 0) { positive = TRUE; count = 2; } else { error("illegal CORRECTION field on Leap line"); return; } if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) { error("illegal Rolling/Stationary field on Leap line"); return; } leapadd(tadd(t, tod), positive, lp->l_value, count); } } static void inlink(char **fields, int nfields) { struct link l; if (nfields != LINK_FIELDS) { error("wrong number of fields on Link line"); return; } if (*fields[LF_FROM] == '\0') { error("blank FROM field on Link line"); return; } if (*fields[LF_TO] == '\0') { error("blank TO field on Link line"); return; } l.l_filename = filename; l.l_linenum = linenum; l.l_from = ecpyalloc(fields[LF_FROM]); l.l_to = ecpyalloc(fields[LF_TO]); links = ereallocarray(links, nlinks + 1, sizeof *links); links[nlinks++] = l; } static void rulesub(struct rule * const rp, const char * const loyearp, const char * const hiyearp, const char * const typep, const char * const monthp, const char * const dayp, const char * const timep) { const struct lookup *lp; const char *cp; char *dp, *ep; if ((lp = byword(monthp, mon_names)) == NULL) { error("invalid month name"); return; } rp->r_month = lp->l_value; rp->r_todisstd = FALSE; rp->r_todisgmt = FALSE; dp = ecpyalloc(timep); if (*dp != '\0') { ep = dp + strlen(dp) - 1; switch (tolower((unsigned char)*ep)) { case 's': /* Standard */ rp->r_todisstd = TRUE; rp->r_todisgmt = FALSE; *ep = '\0'; break; case 'w': /* Wall */ rp->r_todisstd = FALSE; rp->r_todisgmt = FALSE; *ep = '\0'; break; case 'g': /* Greenwich */ case 'u': /* Universal */ case 'z': /* Zulu */ rp->r_todisstd = TRUE; rp->r_todisgmt = TRUE; *ep = '\0'; break; } } rp->r_tod = gethms(dp, "invalid time of day", FALSE); free(dp); /* ** Year work. */ cp = loyearp; lp = byword(cp, begin_years); rp->r_lowasnum = lp == NULL; if (!rp->r_lowasnum) switch ((int) lp->l_value) { case YR_MINIMUM: rp->r_loyear = INT_MIN; break; case YR_MAXIMUM: rp->r_loyear = INT_MAX; break; default: /* "cannot happen" */ errx(1, "panic: Invalid l_value %d", lp->l_value); } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) { error("invalid starting year"); return; } cp = hiyearp; lp = byword(cp, end_years); rp->r_hiwasnum = lp == NULL; if (!rp->r_hiwasnum) switch ((int) lp->l_value) { case YR_MINIMUM: rp->r_hiyear = INT_MIN; break; case YR_MAXIMUM: rp->r_hiyear = INT_MAX; break; case YR_ONLY: rp->r_hiyear = rp->r_loyear; break; default: /* "cannot happen" */ errx(1, "panic: Invalid l_value %d", lp->l_value); } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) { error("invalid ending year"); return; } if (rp->r_loyear > rp->r_hiyear) { error("starting year greater than ending year"); return; } if (*typep == '\0') rp->r_yrtype = NULL; else { if (rp->r_loyear == rp->r_hiyear) { error("typed single year"); return; } rp->r_yrtype = ecpyalloc(typep); } /* ** Day work. ** Accept things such as: ** 1 ** last-Sunday ** Sun<=20 ** Sun>=7 */ dp = ecpyalloc(dayp); if ((lp = byword(dp, lasts)) != NULL) { rp->r_dycode = DC_DOWLEQ; rp->r_wday = lp->l_value; rp->r_dayofmonth = len_months[1][rp->r_month]; } else { if ((ep = strchr(dp, '<')) != 0) rp->r_dycode = DC_DOWLEQ; else if ((ep = strchr(dp, '>')) != 0) rp->r_dycode = DC_DOWGEQ; else { ep = dp; rp->r_dycode = DC_DOM; } if (rp->r_dycode != DC_DOM) { *ep++ = 0; if (*ep++ != '=') { error("invalid day of month"); free(dp); return; } if ((lp = byword(dp, wday_names)) == NULL) { error("invalid weekday name"); free(dp); return; } rp->r_wday = lp->l_value; } if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 || rp->r_dayofmonth <= 0 || (rp->r_dayofmonth > len_months[1][rp->r_month])) { error("invalid day of month"); free(dp); return; } } free(dp); } static void convert(long val, char *buf) { int i; int shift; for (i = 0, shift = 24; i < 4; ++i, shift -= 8) buf[i] = val >> shift; } static void convert64(zic_t val, char *buf) { int i; int shift; for (i = 0, shift = 56; i < 8; ++i, shift -= 8) buf[i] = val >> shift; } static void puttzcode(long val, FILE *fp) { char buf[4]; convert(val, buf); fwrite(buf, sizeof buf, 1, fp); } static void puttzcode64(zic_t val, FILE *fp) { char buf[8]; convert64(val, buf); fwrite(buf, sizeof buf, 1, fp); } static int atcomp(const void *avp, const void *bvp) { const zic_t a = ((const struct attype *) avp)->at; const zic_t b = ((const struct attype *) bvp)->at; return (a < b) ? -1 : (a > b); } static int is32(zic_t x) { return INT32_MIN <= x && x <= INT32_MAX; } static void writezone(const char *name, const char *string) { FILE *fp; int i, j; int leapcnt32, leapi32; int timecnt32, timei32; int pass; static char *fullname; static const struct tzhead tzh0; static struct tzhead tzh; zic_t ats[TZ_MAX_TIMES]; unsigned char types[TZ_MAX_TIMES]; size_t len; /* ** Sort. */ if (timecnt > 1) qsort(attypes, timecnt, sizeof *attypes, atcomp); /* ** Optimize. */ { int fromi; int toi; toi = 0; fromi = 0; while (fromi < timecnt && attypes[fromi].at < min_time) ++fromi; if (isdsts[0] == 0) while (fromi < timecnt && attypes[fromi].type == 0) ++fromi; /* handled by default rule */ for ( ; fromi < timecnt; ++fromi) { if (toi != 0 && ((attypes[fromi].at + gmtoffs[attypes[toi - 1].type]) <= (attypes[toi - 1].at + gmtoffs[toi == 1 ? 0 : attypes[toi - 2].type]))) { attypes[toi - 1].type = attypes[fromi].type; continue; } if (toi == 0 || attypes[toi - 1].type != attypes[fromi].type) attypes[toi++] = attypes[fromi]; } timecnt = toi; } /* ** Transfer. */ for (i = 0; i < timecnt; ++i) { ats[i] = attypes[i].at; types[i] = attypes[i].type; } /* ** Correct for leap seconds. */ for (i = 0; i < timecnt; ++i) { j = leapcnt; while (--j >= 0) if (ats[i] > trans[j] - corr[j]) { ats[i] = tadd(ats[i], corr[j]); break; } } /* ** Figure out 32-bit-limited starts and counts. */ timecnt32 = timecnt; timei32 = 0; leapcnt32 = leapcnt; leapi32 = 0; while (timecnt32 > 0 && !is32(ats[timecnt32 - 1])) --timecnt32; while (timecnt32 > 0 && !is32(ats[timei32])) { --timecnt32; ++timei32; } while (leapcnt32 > 0 && !is32(trans[leapcnt32 - 1])) --leapcnt32; while (leapcnt32 > 0 && !is32(trans[leapi32])) { --leapcnt32; ++leapi32; } len = strlen(directory) + 1 + strlen(name) + 1; fullname = erealloc(fullname, len); snprintf(fullname, len, "%s/%s", directory, name); /* ** Remove old file, if any, to snap links. */ if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) err(1, "Can't remove %s", fullname); if ((fp = fopen(fullname, "wb")) == NULL) { if (mkdirs(fullname) != 0) exit(EXIT_FAILURE); if ((fp = fopen(fullname, "wb")) == NULL) err(1, "Can't create %s", fullname); } for (pass = 1; pass <= 2; ++pass) { int thistimei, thistimecnt; int thisleapi, thisleapcnt; int thistimelim, thisleaplim; int writetype[TZ_MAX_TIMES]; int typemap[TZ_MAX_TYPES]; int thistypecnt; char thischars[TZ_MAX_CHARS]; char thischarcnt; int indmap[TZ_MAX_CHARS]; if (pass == 1) { thistimei = timei32; thistimecnt = timecnt32; thisleapi = leapi32; thisleapcnt = leapcnt32; } else { thistimei = 0; thistimecnt = timecnt; thisleapi = 0; thisleapcnt = leapcnt; } thistimelim = thistimei + thistimecnt; thisleaplim = thisleapi + thisleapcnt; for (i = 0; i < typecnt; ++i) writetype[i] = thistimecnt == timecnt; if (thistimecnt == 0) { /* ** No transition times fall in the current ** (32- or 64-bit) window. */ if (typecnt != 0) writetype[typecnt - 1] = TRUE; } else { for (i = thistimei - 1; i < thistimelim; ++i) if (i >= 0) writetype[types[i]] = TRUE; /* ** For America/Godthab and Antarctica/Palmer */ if (thistimei == 0) writetype[0] = TRUE; } #ifndef LEAVE_SOME_PRE_2011_SYSTEMS_IN_THE_LURCH /* ** For some pre-2011 systems: if the last-to-be-written ** standard (or daylight) type has an offset different from the ** most recently used offset, ** append an (unused) copy of the most recently used type ** (to help get global "altzone" and "timezone" variables ** set correctly). */ { int mrudst, mrustd, hidst, histd, type; hidst = histd = mrudst = mrustd = -1; for (i = thistimei; i < thistimelim; ++i) if (isdsts[types[i]]) mrudst = types[i]; else mrustd = types[i]; for (i = 0; i < typecnt; ++i) if (writetype[i]) { if (isdsts[i]) hidst = i; else histd = i; } if (hidst >= 0 && mrudst >= 0 && hidst != mrudst && gmtoffs[hidst] != gmtoffs[mrudst]) { isdsts[mrudst] = -1; type = addtype(gmtoffs[mrudst], &chars[abbrinds[mrudst]], TRUE, ttisstds[mrudst], ttisgmts[mrudst]); isdsts[mrudst] = TRUE; writetype[type] = TRUE; } if (histd >= 0 && mrustd >= 0 && histd != mrustd && gmtoffs[histd] != gmtoffs[mrustd]) { isdsts[mrustd] = -1; type = addtype(gmtoffs[mrustd], &chars[abbrinds[mrustd]], FALSE, ttisstds[mrustd], ttisgmts[mrustd]); isdsts[mrustd] = FALSE; writetype[type] = TRUE; } } #endif /* !defined LEAVE_SOME_PRE_2011_SYSTEMS_IN_THE_LURCH */ thistypecnt = 0; for (i = 0; i < typecnt; ++i) typemap[i] = writetype[i] ? thistypecnt++ : -1; for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i) indmap[i] = -1; thischarcnt = 0; for (i = 0; i < typecnt; ++i) { char *thisabbr; if (!writetype[i]) continue; if (indmap[abbrinds[i]] >= 0) continue; thisabbr = &chars[abbrinds[i]]; for (j = 0; j < thischarcnt; ++j) if (strcmp(&thischars[j], thisabbr) == 0) break; if (j == thischarcnt) { strlcpy(&thischars[(int) thischarcnt], thisabbr, sizeof(thischars) - thischarcnt); thischarcnt += strlen(thisabbr) + 1; } indmap[abbrinds[i]] = j; } #define DO(field) fwrite(tzh.field, sizeof tzh.field, 1, fp) tzh = tzh0; strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic); tzh.tzh_version[0] = ZIC_VERSION; convert(eitol(thistypecnt), tzh.tzh_ttisgmtcnt); convert(eitol(thistypecnt), tzh.tzh_ttisstdcnt); convert(eitol(thisleapcnt), tzh.tzh_leapcnt); convert(eitol(thistimecnt), tzh.tzh_timecnt); convert(eitol(thistypecnt), tzh.tzh_typecnt); convert(eitol(thischarcnt), tzh.tzh_charcnt); DO(tzh_magic); DO(tzh_version); DO(tzh_reserved); DO(tzh_ttisgmtcnt); DO(tzh_ttisstdcnt); DO(tzh_leapcnt); DO(tzh_timecnt); DO(tzh_typecnt); DO(tzh_charcnt); #undef DO for (i = thistimei; i < thistimelim; ++i) if (pass == 1) puttzcode((long) ats[i], fp); else puttzcode64(ats[i], fp); for (i = thistimei; i < thistimelim; ++i) { unsigned char uc; uc = typemap[types[i]]; fwrite(&uc, sizeof uc, 1, fp); } for (i = 0; i < typecnt; ++i) if (writetype[i]) { puttzcode(gmtoffs[i], fp); putc(isdsts[i], fp); putc((unsigned char)indmap[abbrinds[i]], fp); } if (thischarcnt != 0) fwrite(thischars, sizeof thischars[0], thischarcnt, fp); for (i = thisleapi; i < thisleaplim; ++i) { zic_t todo; if (roll[i]) { if (timecnt == 0 || trans[i] < ats[0]) { j = 0; while (isdsts[j]) if (++j >= typecnt) { j = 0; break; } } else { j = 1; while (j < timecnt && trans[i] >= ats[j]) ++j; j = types[j - 1]; } todo = tadd(trans[i], -gmtoffs[j]); } else todo = trans[i]; if (pass == 1) puttzcode((long) todo, fp); else puttzcode64(todo, fp); puttzcode(corr[i], fp); } for (i = 0; i < typecnt; ++i) if (writetype[i]) putc(ttisstds[i], fp); for (i = 0; i < typecnt; ++i) if (writetype[i]) putc(ttisgmts[i], fp); } fprintf(fp, "\n%s\n", string); if (ferror(fp) || fclose(fp)) errx(1, "Error writing %s", fullname); } static void doabbr(char *abbr, size_t size, const char *format, const char *letters, int isdst, int doquotes) { char *cp, *slashp; int len; slashp = strchr(format, '/'); if (slashp == NULL) { if (letters == NULL) strlcpy(abbr, format, size); else snprintf(abbr, size, format, letters); } else if (isdst) { strlcpy(abbr, slashp + 1, size); } else { if (slashp - format + 1 < size) size = slashp - format + 1; strlcpy(abbr, format, size); } if (!doquotes) return; for (cp = abbr; *cp != '\0'; ++cp) if (strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZ", *cp) == NULL && strchr("abcdefghijklmnopqrstuvwxyz", *cp) == NULL) break; len = strlen(abbr); if (len > 0 && *cp == '\0') return; abbr[len + 2] = '\0'; abbr[len + 1] = '>'; for ( ; len > 0; --len) abbr[len] = abbr[len - 1]; abbr[0] = '<'; } static void updateminmax(int x) { if (min_year > x) min_year = x; if (max_year < x) max_year = x; } static int stringoffset(char *result, size_t size, long offset) { int hours, minutes, seconds; char *ep; result[0] = '\0'; if (offset < 0) { strlcpy(result, "-", size); offset = -offset; } seconds = offset % SECSPERMIN; offset /= SECSPERMIN; minutes = offset % MINSPERHOUR; offset /= MINSPERHOUR; hours = offset; if (hours >= HOURSPERDAY) { result[0] = '\0'; return -1; } ep = end(result, size); snprintf(ep, size - (ep - result), "%d", hours); if (minutes != 0 || seconds != 0) { ep = end(result, size); snprintf(ep, size - (ep - result), ":%02d", minutes); if (seconds != 0) { ep = end(result, size); snprintf(ep, size - (ep - result), ":%02d", seconds); } } return 0; } static int stringrule(char *result, size_t size, const struct rule *rp, long dstoff, long gmtoff) { long tod; char *ep; ep = end(result, size); size -= ep - result; result = ep; if (rp->r_dycode == DC_DOM) { int month, total; if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY) return -1; total = 0; for (month = 0; month < rp->r_month; ++month) total += len_months[0][month]; snprintf(result, size, "J%d", total + rp->r_dayofmonth); } else { int week; if (rp->r_dycode == DC_DOWGEQ) { if ((rp->r_dayofmonth % DAYSPERWEEK) != 1) return -1; week = 1 + rp->r_dayofmonth / DAYSPERWEEK; } else if (rp->r_dycode == DC_DOWLEQ) { if (rp->r_dayofmonth == len_months[1][rp->r_month]) week = 5; else { if ((rp->r_dayofmonth % DAYSPERWEEK) != 0) return -1; week = rp->r_dayofmonth / DAYSPERWEEK; } } else return -1; /* "cannot happen" */ snprintf(result, size, "M%d.%d.%d", rp->r_month + 1, week, rp->r_wday); } tod = rp->r_tod; if (rp->r_todisgmt) tod += gmtoff; if (rp->r_todisstd && rp->r_stdoff == 0) tod += dstoff; if (tod < 0) { result[0] = '\0'; return -1; } if (tod != 2 * SECSPERMIN * MINSPERHOUR) { strlcat(result, "/", size); ep = end(result, size); if (stringoffset(ep, size - (ep - result), tod) != 0) return -1; } return 0; } static void stringzone(char *result, size_t size, const struct zone *zpfirst, int zonecount) { const struct zone *zp; struct rule *rp, *stdrp, *dstrp; int i; const char *abbrvar; char *ep; result[0] = '\0'; zp = zpfirst + zonecount - 1; stdrp = dstrp = NULL; for (i = 0; i < zp->z_nrules; ++i) { rp = &zp->z_rules[i]; if (rp->r_hiwasnum || rp->r_hiyear != INT_MAX) continue; if (rp->r_yrtype != NULL) continue; if (rp->r_stdoff == 0) { if (stdrp == NULL) stdrp = rp; else return; } else { if (dstrp == NULL) dstrp = rp; else return; } } if (stdrp == NULL && dstrp == NULL) { /* ** There are no rules running through "max". ** Let's find the latest rule. */ for (i = 0; i < zp->z_nrules; ++i) { rp = &zp->z_rules[i]; if (stdrp == NULL || rp->r_hiyear > stdrp->r_hiyear || (rp->r_hiyear == stdrp->r_hiyear && rp->r_month > stdrp->r_month)) stdrp = rp; } if (stdrp != NULL && stdrp->r_stdoff != 0) return; /* We end up in DST (a POSIX no-no). */ /* ** Horrid special case: if year is 2037, ** presume this is a zone handled on a year-by-year basis; ** do not try to apply a rule to the zone. */ if (stdrp != NULL && stdrp->r_hiyear == 2037) return; } if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_stdoff != 0)) return; abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar; doabbr(result, size, zp->z_format, abbrvar, FALSE, TRUE); ep = end(result, size); if (stringoffset(ep, size - (ep - result), -zp->z_gmtoff) != 0) { result[0] = '\0'; return; } if (dstrp == NULL) return; ep = end(result, size); doabbr(ep, size - (ep - result), zp->z_format, dstrp->r_abbrvar, TRUE, TRUE); if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR) { ep = end(result, size); if (stringoffset(ep, size - (ep - result), -(zp->z_gmtoff + dstrp->r_stdoff)) != 0) { result[0] = '\0'; return; } } strlcat(result, ",", size); if (stringrule(result, size, dstrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) { result[0] = '\0'; return; } strlcat(result, ",", size); if (stringrule(result, size, stdrp, dstrp->r_stdoff, zp->z_gmtoff) != 0) { result[0] = '\0'; return; } } static void outzone(const struct zone *zpfirst, int zonecount) { const struct zone *zp; struct rule *rp; int i, j, usestart, useuntil, type; zic_t starttime = 0, untiltime = 0; long gmtoff, stdoff, startoff; int year, startttisstd = FALSE, startttisgmt = FALSE; char *startbuf, *ab, *envvar; int max_abbr_len, max_envvar_len; int prodstic; /* all rules are min to max */ max_abbr_len = 2 + max_format_len + max_abbrvar_len; max_envvar_len = 2 * max_abbr_len + 5 * 9; startbuf = emalloc(max_abbr_len + 1); ab = emalloc(max_abbr_len + 1); envvar = emalloc(max_envvar_len + 1); /* ** Now. . .finally. . .generate some useful data! */ timecnt = 0; typecnt = 0; charcnt = 0; prodstic = zonecount == 1; /* ** Thanks to Earl Chew ** for noting the need to unconditionally initialize startttisstd. */ min_year = max_year = EPOCH_YEAR; if (leapseen) { updateminmax(leapminyear); updateminmax(leapmaxyear + (leapmaxyear < INT_MAX)); } for (i = 0; i < zonecount; ++i) { zp = &zpfirst[i]; if (i < zonecount - 1) updateminmax(zp->z_untilrule.r_loyear); for (j = 0; j < zp->z_nrules; ++j) { rp = &zp->z_rules[j]; if (rp->r_lowasnum) updateminmax(rp->r_loyear); if (rp->r_hiwasnum) updateminmax(rp->r_hiyear); if (rp->r_lowasnum || rp->r_hiwasnum) prodstic = FALSE; } } /* ** Generate lots of data if a rule can't cover all future times. */ stringzone(envvar, max_envvar_len + 1, zpfirst, zonecount); if (noise && envvar[0] == '\0') { char * wp; wp = ecpyalloc("no POSIX environment variable for zone"); wp = ecatalloc(wp, " "); wp = ecatalloc(wp, zpfirst->z_name); warning(wp); free(wp); } if (envvar[0] == '\0') { if (min_year >= INT_MIN + YEARSPERREPEAT) min_year -= YEARSPERREPEAT; else min_year = INT_MIN; if (max_year <= INT_MAX - YEARSPERREPEAT) max_year += YEARSPERREPEAT; else max_year = INT_MAX; /* ** Regardless of any of the above, ** for a "proDSTic" zone which specifies that its rules ** always have and always will be in effect, ** we only need one cycle to define the zone. */ if (prodstic) { min_year = 1900; max_year = min_year + YEARSPERREPEAT; } } /* ** For the benefit of older systems, ** generate data from 1900 through 2037. */ if (min_year > 1900) min_year = 1900; if (max_year < 2037) max_year = 2037; for (i = 0; i < zonecount; ++i) { /* ** A guess that may well be corrected later. */ stdoff = 0; zp = &zpfirst[i]; usestart = i > 0 && (zp - 1)->z_untiltime > min_time; useuntil = i < (zonecount - 1); if (useuntil && zp->z_untiltime <= min_time) continue; gmtoff = zp->z_gmtoff; eat(zp->z_filename, zp->z_linenum); *startbuf = '\0'; startoff = zp->z_gmtoff; if (zp->z_nrules == 0) { stdoff = zp->z_stdoff; doabbr(startbuf, max_abbr_len + 1, zp->z_format, NULL, stdoff != 0, FALSE); type = addtype(oadd(zp->z_gmtoff, stdoff), startbuf, stdoff != 0, startttisstd, startttisgmt); if (usestart) { addtt(starttime, type); usestart = FALSE; } else if (stdoff != 0) addtt(min_time, type); } else for (year = min_year; year <= max_year; ++year) { if (useuntil && year > zp->z_untilrule.r_hiyear) break; /* ** Mark which rules to do in the current year. ** For those to do, calculate rpytime(rp, year); */ for (j = 0; j < zp->z_nrules; ++j) { rp = &zp->z_rules[j]; eats(zp->z_filename, zp->z_linenum, rp->r_filename, rp->r_linenum); rp->r_todo = year >= rp->r_loyear && year <= rp->r_hiyear && yearistype(year, rp->r_yrtype); if (rp->r_todo) rp->r_temp = rpytime(rp, year); } for ( ; ; ) { int k; zic_t jtime, ktime = 0; long offset; if (useuntil) { /* ** Turn untiltime into UTC ** assuming the current gmtoff and ** stdoff values. */ untiltime = zp->z_untiltime; if (!zp->z_untilrule.r_todisgmt) untiltime = tadd(untiltime, -gmtoff); if (!zp->z_untilrule.r_todisstd) untiltime = tadd(untiltime, -stdoff); } /* ** Find the rule (of those to do, if any) ** that takes effect earliest in the year. */ k = -1; for (j = 0; j < zp->z_nrules; ++j) { rp = &zp->z_rules[j]; if (!rp->r_todo) continue; eats(zp->z_filename, zp->z_linenum, rp->r_filename, rp->r_linenum); offset = rp->r_todisgmt ? 0 : gmtoff; if (!rp->r_todisstd) offset = oadd(offset, stdoff); jtime = rp->r_temp; if (jtime == min_time || jtime == max_time) continue; jtime = tadd(jtime, -offset); if (k < 0 || jtime < ktime) { k = j; ktime = jtime; } } if (k < 0) break; /* go on to next year */ rp = &zp->z_rules[k]; rp->r_todo = FALSE; if (useuntil && ktime >= untiltime) break; stdoff = rp->r_stdoff; if (usestart && ktime == starttime) usestart = FALSE; if (usestart) { if (ktime < starttime) { startoff = oadd(zp->z_gmtoff, stdoff); doabbr(startbuf, max_abbr_len + 1, zp->z_format, rp->r_abbrvar, rp->r_stdoff != 0, FALSE); continue; } if (*startbuf == '\0' && startoff == oadd(zp->z_gmtoff, stdoff)) { doabbr(startbuf, max_abbr_len + 1, zp->z_format, rp->r_abbrvar, rp->r_stdoff != 0, FALSE); } } eats(zp->z_filename, zp->z_linenum, rp->r_filename, rp->r_linenum); doabbr(ab, max_abbr_len + 1, zp->z_format, rp->r_abbrvar, rp->r_stdoff != 0, FALSE); offset = oadd(zp->z_gmtoff, rp->r_stdoff); type = addtype(offset, ab, rp->r_stdoff != 0, rp->r_todisstd, rp->r_todisgmt); addtt(ktime, type); } } if (usestart) { if (*startbuf == '\0' && zp->z_format != NULL && strchr(zp->z_format, '%') == NULL && strchr(zp->z_format, '/') == NULL) strlcpy(startbuf, zp->z_format, max_abbr_len + 1); eat(zp->z_filename, zp->z_linenum); if (*startbuf == '\0') error("can't determine time zone abbreviation to use just after until time"); else addtt(starttime, addtype(startoff, startbuf, startoff != zp->z_gmtoff, startttisstd, startttisgmt)); } /* ** Now we may get to set starttime for the next zone line. */ if (useuntil) { startttisstd = zp->z_untilrule.r_todisstd; startttisgmt = zp->z_untilrule.r_todisgmt; starttime = zp->z_untiltime; if (!startttisstd) starttime = tadd(starttime, -stdoff); if (!startttisgmt) starttime = tadd(starttime, -gmtoff); } } writezone(zpfirst->z_name, envvar); free(startbuf); free(ab); free(envvar); } static void addtt(const zic_t starttime, int type) { size_t len; if (starttime <= min_time || (timecnt == 1 && attypes[0].at < min_time)) { gmtoffs[0] = gmtoffs[type]; isdsts[0] = isdsts[type]; ttisstds[0] = ttisstds[type]; ttisgmts[0] = ttisgmts[type]; if (abbrinds[type] != 0) { len = strlen(&chars[abbrinds[type]]) + 1; memmove(chars, &chars[abbrinds[type]], len); } abbrinds[0] = 0; charcnt = strlen(chars) + 1; typecnt = 1; timecnt = 0; type = 0; } if (timecnt >= TZ_MAX_TIMES) { error("too many transitions?!"); exit(EXIT_FAILURE); } attypes[timecnt].at = starttime; attypes[timecnt].type = type; ++timecnt; } static int addtype(long gmtoff, const char *abbr, int isdst, int ttisstd, int ttisgmt) { int i, j; if (isdst != TRUE && isdst != FALSE) { error("internal error - addtype called with bad isdst"); exit(EXIT_FAILURE); } if (ttisstd != TRUE && ttisstd != FALSE) { error("internal error - addtype called with bad ttisstd"); exit(EXIT_FAILURE); } if (ttisgmt != TRUE && ttisgmt != FALSE) { error("internal error - addtype called with bad ttisgmt"); exit(EXIT_FAILURE); } /* ** See if there's already an entry for this zone type. ** If so, just return its index. */ for (i = 0; i < typecnt; ++i) { if (gmtoff == gmtoffs[i] && isdst == isdsts[i] && strcmp(abbr, &chars[abbrinds[i]]) == 0 && ttisstd == ttisstds[i] && ttisgmt == ttisgmts[i]) return i; } /* ** There isn't one; add a new one, unless there are already too ** many. */ if (typecnt >= TZ_MAX_TYPES) { error("too many local time types"); exit(EXIT_FAILURE); } if (! (-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L)) { error("UTC offset out of range"); exit(EXIT_FAILURE); } gmtoffs[i] = gmtoff; isdsts[i] = isdst; ttisstds[i] = ttisstd; ttisgmts[i] = ttisgmt; for (j = 0; j < charcnt; ++j) if (strcmp(&chars[j], abbr) == 0) break; if (j == charcnt) newabbr(abbr); abbrinds[i] = j; ++typecnt; return i; } static void leapadd(zic_t t, int positive, int rolling, int count) { int i, j; if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) { error("too many leap seconds"); exit(EXIT_FAILURE); } for (i = 0; i < leapcnt; ++i) if (t <= trans[i]) { if (t == trans[i]) { error("repeated leap second moment"); exit(EXIT_FAILURE); } break; } do { for (j = leapcnt; j > i; --j) { trans[j] = trans[j - 1]; corr[j] = corr[j - 1]; roll[j] = roll[j - 1]; } trans[i] = t; corr[i] = positive ? 1L : eitol(-count); roll[i] = rolling; ++leapcnt; } while (positive && --count != 0); } static void adjleap(void) { int i; long last = 0; /* ** propagate leap seconds forward */ for (i = 0; i < leapcnt; ++i) { trans[i] = tadd(trans[i], last); last = corr[i] += last; } } static int yearistype(int year, const char *type) { static char *buf; int result; size_t len; if (type == NULL || *type == '\0') return TRUE; len = 132 + strlen(yitcommand) + strlen(type); buf = erealloc(buf, len); snprintf(buf, len, "%s %d %s", yitcommand, year, type); result = system(buf); if (WIFEXITED(result)) switch (WEXITSTATUS(result)) { case 0: return TRUE; case 1: return FALSE; } error("Wild result from command execution"); errx(1, "command was '%s', result was %d", buf, result); } /* this function is not strncasecmp */ static int itsabbr(const char *sabbr, const char *sword) { const unsigned char *abbr = sabbr; const unsigned char *word = sword; if (tolower(*abbr) != tolower(*word)) return FALSE; while (*++abbr != '\0') do { ++word; if (*word == '\0') return FALSE; } while (tolower(*word) != tolower(*abbr)); return TRUE; } static const struct lookup * byword(const char *word, const struct lookup *table) { const struct lookup *foundlp; const struct lookup *lp; if (word == NULL || table == NULL) return NULL; /* ** Look for exact match. */ for (lp = table; lp->l_word != NULL; ++lp) if (strcasecmp(word, lp->l_word) == 0) return lp; /* ** Look for inexact match. */ foundlp = NULL; for (lp = table; lp->l_word != NULL; ++lp) if (itsabbr(word, lp->l_word)) { if (foundlp == NULL) foundlp = lp; else return NULL; /* multiple inexact matches */ } return foundlp; } static char ** getfields(char *cp) { char *dp; char **array; int nsubs; if (cp == NULL) return NULL; array = ereallocarray(NULL, strlen(cp) + 1, sizeof *array); nsubs = 0; for ( ; ; ) { while (isascii((unsigned char)*cp) && isspace((unsigned char)*cp)) ++cp; if (*cp == '\0' || *cp == '#') break; array[nsubs++] = dp = cp; do { if ((*dp = *cp++) != '"') { ++dp; } else { while ((*dp = *cp++) != '"') { if (*dp != '\0') ++dp; else { error("Odd number of quotation marks"); exit(EXIT_FAILURE); } } } } while (*cp != '\0' && *cp != '#' && (!isascii((unsigned char)*cp) || !isspace((unsigned char)*cp))); if (isascii((unsigned char)*cp) && isspace((unsigned char)*cp)) ++cp; *dp = '\0'; } array[nsubs] = NULL; return array; } static long oadd(long t1, long t2) { long t = t1 + t2; if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) { error("time overflow"); exit(EXIT_FAILURE); } return t; } static zic_t tadd(zic_t t1, long t2) { zic_t t; if (t1 == max_time && t2 > 0) return max_time; if (t1 == min_time && t2 < 0) return min_time; t = t1 + t2; if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) { error("time overflow"); exit(EXIT_FAILURE); } return t; } /* ** Given a rule, and a year, compute the date - in seconds since January 1, ** 1970, 00:00 LOCAL time - in that year that the rule refers to. */ static zic_t rpytime(const struct rule *rp, int wantedy) { int y, m, i; long dayoff; /* with a nod to Margaret O. */ zic_t t; if (wantedy == INT_MIN) return min_time; if (wantedy == INT_MAX) return max_time; dayoff = 0; m = TM_JANUARY; y = EPOCH_YEAR; while (wantedy != y) { if (wantedy > y) { i = len_years[isleap(y)]; ++y; } else { --y; i = -len_years[isleap(y)]; } dayoff = oadd(dayoff, eitol(i)); } while (m != rp->r_month) { i = len_months[isleap(y)][m]; dayoff = oadd(dayoff, eitol(i)); ++m; } i = rp->r_dayofmonth; if (m == TM_FEBRUARY && i == 29 && !isleap(y)) { if (rp->r_dycode == DC_DOWLEQ) --i; else { error("use of 2/29 in non leap-year"); exit(EXIT_FAILURE); } } --i; dayoff = oadd(dayoff, eitol(i)); if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) { long wday; #define LDAYSPERWEEK ((long) DAYSPERWEEK) wday = eitol(EPOCH_WDAY); /* ** Don't trust mod of negative numbers. */ if (dayoff >= 0) wday = (wday + dayoff) % LDAYSPERWEEK; else { wday -= ((-dayoff) % LDAYSPERWEEK); if (wday < 0) wday += LDAYSPERWEEK; } while (wday != eitol(rp->r_wday)) if (rp->r_dycode == DC_DOWGEQ) { dayoff = oadd(dayoff, 1); if (++wday >= LDAYSPERWEEK) wday = 0; ++i; } else { dayoff = oadd(dayoff, -1); if (--wday < 0) wday = LDAYSPERWEEK - 1; --i; } } if (dayoff < min_time / SECSPERDAY) return min_time; if (dayoff > max_time / SECSPERDAY) return max_time; t = (zic_t) dayoff * SECSPERDAY; return tadd(t, rp->r_tod); } static void newabbr(const char *string) { int i; if (strcmp(string, GRANDPARENTED) != 0) { const char * cp; char * wp; cp = string; wp = NULL; while (isascii((unsigned char)*cp) && (isalnum((unsigned char)*cp) || *cp == '-' || *cp == '+')) ++cp; if (noise && cp - string > 3) wp = "time zone abbreviation has more than 3 characters"; if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN) wp = "time zone abbreviation has too many characters"; if (*cp != '\0') wp = "time zone abbreviation differs from POSIX standard"; if (wp != NULL) { wp = ecpyalloc(wp); wp = ecatalloc(wp, " ("); wp = ecatalloc(wp, string); wp = ecatalloc(wp, ")"); warning(wp); free(wp); } } i = strlen(string) + 1; if (charcnt + i > TZ_MAX_CHARS) { error("too many, or too long, time zone abbreviations"); exit(EXIT_FAILURE); } strlcpy(&chars[charcnt], string, sizeof(chars) - charcnt); charcnt += eitol(i); } static int mkdirs(char *argname) { char * name; char * cp; if (argname == NULL || *argname == '\0') return 0; cp = name = ecpyalloc(argname); while ((cp = strchr(cp + 1, '/')) != 0) { *cp = '\0'; if (!itsdir(name)) { /* ** It doesn't seem to exist, so we try to create it. ** Creation may fail because of the directory being ** created by some other multiprocessor, so we get ** to do extra checking. */ if (mkdir(name, MKDIR_UMASK) != 0) { const char *e = strerror(errno); if (errno != EEXIST || !itsdir(name)) { fprintf(stderr, "%s: Can't create directory %s: %s\n", __progname, name, e); free(name); return -1; } } } *cp = '/'; } free(name); return 0; } static long eitol(int i) { long l = i; if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) errx(1, "%d did not sign extend correctly", i); return l; }