Annotation of src/lib/libc/time/zic.c, Revision 1.10
1.10 ! lukem 1: /* $NetBSD: zic.c,v 1.9 1997/07/13 20:26:56 christos Exp $ */
1.2 jtc 2:
1.9 christos 3: #include <sys/cdefs.h>
1.1 jtc 4: #ifndef lint
5: #ifndef NOID
1.9 christos 6: #if 0
1.7 jtc 7: static char elsieid[] = "@(#)zic.c 7.87";
1.9 christos 8: #else
1.10 ! lukem 9: __RCSID("$NetBSD: zic.c,v 1.9 1997/07/13 20:26:56 christos Exp $");
1.9 christos 10: #endif
1.1 jtc 11: #endif /* !defined NOID */
12: #endif /* !defined lint */
13:
14: #include "private.h"
1.5 jtc 15: #include "locale.h"
1.1 jtc 16: #include "tzfile.h"
17: #include "sys/stat.h" /* for umask manifest constants */
18:
1.3 jtc 19: /*
20: ** On some ancient hosts, predicates like `isspace(C)' are defined
21: ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
22: ** which says they are defined only if C == ((unsigned char) C) || C == EOF.
23: ** Neither the C Standard nor Posix require that `isascii' exist.
24: ** For portability, we check both ancient and modern requirements.
25: ** If isascii is not defined, the isascii check succeeds trivially.
26: */
27: #include "ctype.h"
28: #ifndef isascii
29: #define isascii(x) 1
30: #endif
31:
1.1 jtc 32: struct rule {
33: const char * r_filename;
34: int r_linenum;
35: const char * r_name;
36:
37: int r_loyear; /* for example, 1986 */
38: int r_hiyear; /* for example, 1986 */
39: const char * r_yrtype;
40:
41: int r_month; /* 0..11 */
42:
43: int r_dycode; /* see below */
44: int r_dayofmonth;
45: int r_wday;
46:
47: long r_tod; /* time from midnight */
48: int r_todisstd; /* above is standard time if TRUE */
49: /* or wall clock time if FALSE */
50: int r_todisgmt; /* above is GMT if TRUE */
51: /* or local time if FALSE */
52: long r_stdoff; /* offset from standard time */
53: const char * r_abbrvar; /* variable part of abbreviation */
54:
55: int r_todo; /* a rule to do (used in outzone) */
56: time_t r_temp; /* used in outzone */
57: };
58:
59: /*
60: ** r_dycode r_dayofmonth r_wday
61: */
62:
63: #define DC_DOM 0 /* 1..31 */ /* unused */
64: #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
65: #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
66:
67: struct zone {
68: const char * z_filename;
69: int z_linenum;
70:
71: const char * z_name;
72: long z_gmtoff;
73: const char * z_rule;
74: const char * z_format;
75:
76: long z_stdoff;
77:
78: struct rule * z_rules;
79: int z_nrules;
80:
81: struct rule z_untilrule;
82: time_t z_untiltime;
83: };
84:
85: extern int getopt P((int argc, char * const argv[],
86: const char * options));
87: extern int link P((const char * fromname, const char * toname));
88: extern char * optarg;
89: extern int optind;
90:
1.10 ! lukem 91: static int atcomp P((const void *, const void *));
1.1 jtc 92: static void addtt P((time_t starttime, int type));
93: static int addtype P((long gmtoff, const char * abbr, int isdst,
94: int ttisstd, int ttisgmt));
95: static void leapadd P((time_t t, int positive, int rolling, int count));
96: static void adjleap P((void));
97: static void associate P((void));
98: static int ciequal P((const char * ap, const char * bp));
99: static void convert P((long val, char * buf));
100: static void dolink P((const char * fromfile, const char * tofile));
1.6 mrg 101: static void doabbr P((char * abbr, int abbrlen, const char * format,
1.1 jtc 102: const char * letters, int isdst));
103: static void eat P((const char * name, int num));
104: static void eats P((const char * name, int num,
105: const char * rname, int rnum));
106: static long eitol P((int i));
107: static void error P((const char * message));
108: static char ** getfields P((char * buf));
109: static long gethms P((const char * string, const char * errstrng,
110: int signable));
111: static void infile P((const char * filename));
112: static void inleap P((char ** fields, int nfields));
113: static void inlink P((char ** fields, int nfields));
114: static void inrule P((char ** fields, int nfields));
115: static int inzcont P((char ** fields, int nfields));
116: static int inzone P((char ** fields, int nfields));
117: static int inzsub P((char ** fields, int nfields, int iscont));
118: static int itsabbr P((const char * abbr, const char * word));
119: static int itsdir P((const char * name));
120: static int lowerit P((int c));
1.10 ! lukem 121: int main P((int, char **));
1.1 jtc 122: static char * memcheck P((char * tocheck));
123: static int mkdirs P((char * filename));
124: static void newabbr P((const char * abbr));
125: static long oadd P((long t1, long t2));
126: static void outzone P((const struct zone * zp, int ntzones));
127: static void puttzcode P((long code, FILE * fp));
128: static int rcomp P((const void * leftp, const void * rightp));
129: static time_t rpytime P((const struct rule * rp, int wantedy));
130: static void rulesub P((struct rule * rp,
131: const char * loyearp, const char * hiyearp,
132: const char * typep, const char * monthp,
133: const char * dayp, const char * timep));
134: static void setboundaries P((void));
135: static time_t tadd P((time_t t1, long t2));
136: static void usage P((void));
1.10 ! lukem 137: static void warning P((const char * const));
1.1 jtc 138: static void writezone P((const char * name));
139: static int yearistype P((int year, const char * type));
140:
1.5 jtc 141: #if !(HAVE_STRERROR - 0)
142: static char * strerror P((int));
143: #endif /* !(HAVE_STRERROR - 0) */
144:
1.1 jtc 145: static int charcnt;
146: static int errors;
147: static const char * filename;
148: static int leapcnt;
149: static int linenum;
150: static time_t max_time;
151: static int max_year;
1.7 jtc 152: static int max_year_representable;
1.1 jtc 153: static time_t min_time;
154: static int min_year;
1.7 jtc 155: static int min_year_representable;
1.1 jtc 156: static int noise;
157: static const char * rfilename;
158: static int rlinenum;
159: static const char * progname;
160: static int timecnt;
161: static int typecnt;
162:
163: /*
164: ** Line codes.
165: */
166:
167: #define LC_RULE 0
168: #define LC_ZONE 1
169: #define LC_LINK 2
170: #define LC_LEAP 3
171:
172: /*
173: ** Which fields are which on a Zone line.
174: */
175:
176: #define ZF_NAME 1
177: #define ZF_GMTOFF 2
178: #define ZF_RULE 3
179: #define ZF_FORMAT 4
180: #define ZF_TILYEAR 5
181: #define ZF_TILMONTH 6
182: #define ZF_TILDAY 7
183: #define ZF_TILTIME 8
184: #define ZONE_MINFIELDS 5
185: #define ZONE_MAXFIELDS 9
186:
187: /*
188: ** Which fields are which on a Zone continuation line.
189: */
190:
191: #define ZFC_GMTOFF 0
192: #define ZFC_RULE 1
193: #define ZFC_FORMAT 2
194: #define ZFC_TILYEAR 3
195: #define ZFC_TILMONTH 4
196: #define ZFC_TILDAY 5
197: #define ZFC_TILTIME 6
198: #define ZONEC_MINFIELDS 3
199: #define ZONEC_MAXFIELDS 7
200:
201: /*
202: ** Which files are which on a Rule line.
203: */
204:
205: #define RF_NAME 1
206: #define RF_LOYEAR 2
207: #define RF_HIYEAR 3
208: #define RF_COMMAND 4
209: #define RF_MONTH 5
210: #define RF_DAY 6
211: #define RF_TOD 7
212: #define RF_STDOFF 8
213: #define RF_ABBRVAR 9
214: #define RULE_FIELDS 10
215:
216: /*
217: ** Which fields are which on a Link line.
218: */
219:
220: #define LF_FROM 1
221: #define LF_TO 2
222: #define LINK_FIELDS 3
223:
224: /*
225: ** Which fields are which on a Leap line.
226: */
227:
228: #define LP_YEAR 1
229: #define LP_MONTH 2
230: #define LP_DAY 3
231: #define LP_TIME 4
232: #define LP_CORR 5
233: #define LP_ROLL 6
234: #define LEAP_FIELDS 7
235:
236: /*
237: ** Year synonyms.
238: */
239:
240: #define YR_MINIMUM 0
241: #define YR_MAXIMUM 1
242: #define YR_ONLY 2
243:
244: static struct rule * rules;
245: static int nrules; /* number of rules */
246:
247: static struct zone * zones;
248: static int nzones; /* number of zones */
249:
250: struct link {
251: const char * l_filename;
252: int l_linenum;
253: const char * l_from;
254: const char * l_to;
255: };
256:
257: static struct link * links;
258: static int nlinks;
259:
260: struct lookup {
261: const char * l_word;
262: const int l_value;
263: };
264:
265: static struct lookup const * byword P((const char * string,
266: const struct lookup * lp));
267:
268: static struct lookup const line_codes[] = {
269: { "Rule", LC_RULE },
270: { "Zone", LC_ZONE },
271: { "Link", LC_LINK },
272: { "Leap", LC_LEAP },
273: { NULL, 0}
274: };
275:
276: static struct lookup const mon_names[] = {
277: { "January", TM_JANUARY },
278: { "February", TM_FEBRUARY },
279: { "March", TM_MARCH },
280: { "April", TM_APRIL },
281: { "May", TM_MAY },
282: { "June", TM_JUNE },
283: { "July", TM_JULY },
284: { "August", TM_AUGUST },
285: { "September", TM_SEPTEMBER },
286: { "October", TM_OCTOBER },
287: { "November", TM_NOVEMBER },
288: { "December", TM_DECEMBER },
289: { NULL, 0 }
290: };
291:
292: static struct lookup const wday_names[] = {
293: { "Sunday", TM_SUNDAY },
294: { "Monday", TM_MONDAY },
295: { "Tuesday", TM_TUESDAY },
296: { "Wednesday", TM_WEDNESDAY },
297: { "Thursday", TM_THURSDAY },
298: { "Friday", TM_FRIDAY },
299: { "Saturday", TM_SATURDAY },
300: { NULL, 0 }
301: };
302:
303: static struct lookup const lasts[] = {
304: { "last-Sunday", TM_SUNDAY },
305: { "last-Monday", TM_MONDAY },
306: { "last-Tuesday", TM_TUESDAY },
307: { "last-Wednesday", TM_WEDNESDAY },
308: { "last-Thursday", TM_THURSDAY },
309: { "last-Friday", TM_FRIDAY },
310: { "last-Saturday", TM_SATURDAY },
311: { NULL, 0 }
312: };
313:
314: static struct lookup const begin_years[] = {
315: { "minimum", YR_MINIMUM },
316: { "maximum", YR_MAXIMUM },
317: { NULL, 0 }
318: };
319:
320: static struct lookup const end_years[] = {
321: { "minimum", YR_MINIMUM },
322: { "maximum", YR_MAXIMUM },
323: { "only", YR_ONLY },
324: { NULL, 0 }
325: };
326:
327: static struct lookup const leap_types[] = {
328: { "Rolling", TRUE },
329: { "Stationary", FALSE },
330: { NULL, 0 }
331: };
332:
333: static const int len_months[2][MONSPERYEAR] = {
334: { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
335: { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
336: };
337:
338: static const int len_years[2] = {
339: DAYSPERNYEAR, DAYSPERLYEAR
340: };
341:
1.5 jtc 342: static struct attype {
343: time_t at;
344: unsigned char type;
345: } attypes[TZ_MAX_TIMES];
1.1 jtc 346: static long gmtoffs[TZ_MAX_TYPES];
347: static char isdsts[TZ_MAX_TYPES];
348: static unsigned char abbrinds[TZ_MAX_TYPES];
349: static char ttisstds[TZ_MAX_TYPES];
350: static char ttisgmts[TZ_MAX_TYPES];
351: static char chars[TZ_MAX_CHARS];
352: static time_t trans[TZ_MAX_LEAPS];
353: static long corr[TZ_MAX_LEAPS];
354: static char roll[TZ_MAX_LEAPS];
355:
356: /*
357: ** Memory allocation.
358: */
359:
360: static char *
361: memcheck(ptr)
362: char * const ptr;
363: {
364: if (ptr == NULL) {
1.5 jtc 365: const char *e = strerror(errno);
1.7 jtc 366:
1.5 jtc 367: (void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
368: progname, e);
1.1 jtc 369: (void) exit(EXIT_FAILURE);
370: }
371: return ptr;
372: }
373:
374: #define emalloc(size) memcheck(imalloc(size))
375: #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
376: #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
377: #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
378:
379: /*
380: ** Error handling.
381: */
382:
1.5 jtc 383: #if !(HAVE_STRERROR - 0)
384: static char *
385: strerror(errnum)
386: int errnum;
387: {
388: extern char * sys_errlist[];
389: extern int sys_nerr;
390:
391: return (errnum > 0 && errnum <= sys_nerr) ?
392: sys_errlist[errnum] : "Unknown system error";
393: }
394: #endif /* !(HAVE_STRERROR - 0) */
395:
1.1 jtc 396: static void
397: eats(name, num, rname, rnum)
398: const char * const name;
399: const int num;
400: const char * const rname;
401: const int rnum;
402: {
403: filename = name;
404: linenum = num;
405: rfilename = rname;
406: rlinenum = rnum;
407: }
408:
409: static void
410: eat(name, num)
411: const char * const name;
412: const int num;
413: {
414: eats(name, num, (char *) NULL, -1);
415: }
416:
417: static void
418: error(string)
419: const char * const string;
420: {
421: /*
422: ** Match the format of "cc" to allow sh users to
423: ** zic ... 2>&1 | error -t "*" -v
424: ** on BSD systems.
425: */
1.5 jtc 426: (void) fprintf(stderr, _("\"%s\", line %d: %s"),
1.1 jtc 427: filename, linenum, string);
428: if (rfilename != NULL)
1.5 jtc 429: (void) fprintf(stderr, _(" (rule from \"%s\", line %d)"),
1.1 jtc 430: rfilename, rlinenum);
431: (void) fprintf(stderr, "\n");
432: ++errors;
433: }
434:
435: static void
1.5 jtc 436: warning(string)
437: const char * const string;
438: {
439: char * cp;
440:
441: cp = ecpyalloc("warning: ");
442: cp = ecatalloc(cp, string);
1.7 jtc 443: error(cp);
1.5 jtc 444: ifree(cp);
445: --errors;
446: }
447:
448: static void
1.1 jtc 449: usage P((void))
450: {
1.5 jtc 451: (void) fprintf(stderr, _("%s: usage is %s [ -s ] [ -v ] [ -l localtime ] [ -p posixrules ] [ -d directory ]\n\t[ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n"),
1.1 jtc 452: progname, progname);
453: (void) exit(EXIT_FAILURE);
454: }
455:
456: static const char * psxrules;
457: static const char * lcltime;
458: static const char * directory;
459: static const char * leapsec;
460: static const char * yitcommand;
461: static int sflag = FALSE;
462:
463: int
464: main(argc, argv)
465: int argc;
466: char * argv[];
467: {
468: register int i;
469: register int j;
470: register int c;
471:
472: #ifdef unix
473: (void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
474: #endif /* defined unix */
1.5 jtc 475: #if HAVE_GETTEXT - 0
476: (void) setlocale(LC_MESSAGES, "");
477: #ifdef TZ_DOMAINDIR
478: (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
479: #endif /* defined TEXTDOMAINDIR */
480: (void) textdomain(TZ_DOMAIN);
481: #endif /* HAVE_GETTEXT - 0 */
1.1 jtc 482: progname = argv[0];
1.7 jtc 483: while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF && c != -1)
1.1 jtc 484: switch (c) {
485: default:
486: usage();
487: case 'd':
488: if (directory == NULL)
489: directory = optarg;
490: else {
491: (void) fprintf(stderr,
1.5 jtc 492: _("%s: More than one -d option specified\n"),
1.1 jtc 493: progname);
494: (void) exit(EXIT_FAILURE);
495: }
496: break;
497: case 'l':
498: if (lcltime == NULL)
499: lcltime = optarg;
500: else {
501: (void) fprintf(stderr,
1.5 jtc 502: _("%s: More than one -l option specified\n"),
1.1 jtc 503: progname);
504: (void) exit(EXIT_FAILURE);
505: }
506: break;
507: case 'p':
508: if (psxrules == NULL)
509: psxrules = optarg;
510: else {
511: (void) fprintf(stderr,
1.5 jtc 512: _("%s: More than one -p option specified\n"),
1.1 jtc 513: progname);
514: (void) exit(EXIT_FAILURE);
515: }
516: break;
517: case 'y':
518: if (yitcommand == NULL)
519: yitcommand = optarg;
520: else {
521: (void) fprintf(stderr,
1.5 jtc 522: _("%s: More than one -y option specified\n"),
1.1 jtc 523: progname);
524: (void) exit(EXIT_FAILURE);
525: }
526: break;
527: case 'L':
528: if (leapsec == NULL)
529: leapsec = optarg;
530: else {
531: (void) fprintf(stderr,
1.5 jtc 532: _("%s: More than one -L option specified\n"),
1.1 jtc 533: progname);
534: (void) exit(EXIT_FAILURE);
535: }
536: break;
537: case 'v':
538: noise = TRUE;
539: break;
540: case 's':
541: sflag = TRUE;
542: break;
543: }
544: if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
545: usage(); /* usage message by request */
546: if (directory == NULL)
547: directory = TZDIR;
548: if (yitcommand == NULL)
549: yitcommand = "yearistype";
550:
551: setboundaries();
552:
553: if (optind < argc && leapsec != NULL) {
554: infile(leapsec);
555: adjleap();
556: }
557:
558: for (i = optind; i < argc; ++i)
559: infile(argv[i]);
560: if (errors)
561: (void) exit(EXIT_FAILURE);
562: associate();
563: for (i = 0; i < nzones; i = j) {
564: /*
565: ** Find the next non-continuation zone entry.
566: */
567: for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
568: continue;
569: outzone(&zones[i], j - i);
570: }
571: /*
572: ** Make links.
573: */
574: for (i = 0; i < nlinks; ++i)
575: dolink(links[i].l_from, links[i].l_to);
576: if (lcltime != NULL)
577: dolink(lcltime, TZDEFAULT);
578: if (psxrules != NULL)
579: dolink(psxrules, TZDEFRULES);
580: return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
581: }
582:
583: static void
584: dolink(fromfile, tofile)
585: const char * const fromfile;
586: const char * const tofile;
587: {
588: register char * fromname;
589: register char * toname;
590:
591: if (fromfile[0] == '/')
592: fromname = ecpyalloc(fromfile);
593: else {
594: fromname = ecpyalloc(directory);
595: fromname = ecatalloc(fromname, "/");
596: fromname = ecatalloc(fromname, fromfile);
597: }
598: if (tofile[0] == '/')
599: toname = ecpyalloc(tofile);
600: else {
601: toname = ecpyalloc(directory);
602: toname = ecatalloc(toname, "/");
603: toname = ecatalloc(toname, tofile);
604: }
605: /*
606: ** We get to be careful here since
607: ** there's a fair chance of root running us.
608: */
609: if (!itsdir(toname))
610: (void) remove(toname);
611: if (link(fromname, toname) != 0) {
612: if (mkdirs(toname) != 0)
613: (void) exit(EXIT_FAILURE);
614: if (link(fromname, toname) != 0) {
1.5 jtc 615: const char *e = strerror(errno);
1.7 jtc 616:
1.5 jtc 617: (void) fprintf(stderr,
618: _("%s: Can't link from %s to %s: %s\n"),
619: progname, fromname, toname, e);
1.1 jtc 620: (void) exit(EXIT_FAILURE);
621: }
622: }
623: ifree(fromname);
624: ifree(toname);
625: }
626:
1.3 jtc 627: #ifndef INT_MAX
628: #define INT_MAX ((int) (((unsigned)~0)>>1))
629: #endif /* !defined INT_MAX */
630:
631: #ifndef INT_MIN
632: #define INT_MIN ((int) ~(((unsigned)~0)>>1))
633: #endif /* !defined INT_MIN */
634:
635: /*
636: ** The tz file format currently allows at most 32-bit quantities.
637: ** This restriction should be removed before signed 32-bit values
638: ** wrap around in 2038, but unfortunately this will require a
639: ** change to the tz file format.
640: */
641:
642: #define MAX_BITS_IN_FILE 32
1.5 jtc 643: #define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE)
1.3 jtc 644:
1.1 jtc 645: static void
646: setboundaries P((void))
647: {
1.4 jtc 648: if (TYPE_SIGNED(time_t)) {
1.3 jtc 649: min_time = ~ (time_t) 0;
650: min_time <<= TIME_T_BITS_IN_FILE - 1;
651: max_time = ~ (time_t) 0 - min_time;
1.1 jtc 652: if (sflag)
1.3 jtc 653: min_time = 0;
1.1 jtc 654: } else {
1.3 jtc 655: min_time = 0;
656: max_time = 2 - sflag;
657: max_time <<= TIME_T_BITS_IN_FILE - 1;
658: --max_time;
1.1 jtc 659: }
660: min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
661: max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
1.7 jtc 662: min_year_representable = min_year;
663: max_year_representable = max_year;
1.1 jtc 664: }
665:
666: static int
667: itsdir(name)
668: const char * const name;
669: {
670: register char * myname;
671: register int accres;
672:
673: myname = ecpyalloc(name);
674: myname = ecatalloc(myname, "/.");
675: accres = access(myname, F_OK);
676: ifree(myname);
677: return accres == 0;
678: }
679:
680: /*
681: ** Associate sets of rules with zones.
682: */
683:
684: /*
685: ** Sort by rule name.
686: */
687:
688: static int
689: rcomp(cp1, cp2)
690: const void * cp1;
691: const void * cp2;
692: {
693: return strcmp(((const struct rule *) cp1)->r_name,
694: ((const struct rule *) cp2)->r_name);
695: }
696:
697: static void
698: associate P((void))
699: {
700: register struct zone * zp;
701: register struct rule * rp;
702: register int base, out;
1.5 jtc 703: register int i, j;
1.1 jtc 704:
1.5 jtc 705: if (nrules != 0) {
1.1 jtc 706: (void) qsort((void *) rules, (size_t) nrules,
707: (size_t) sizeof *rules, rcomp);
1.5 jtc 708: for (i = 0; i < nrules - 1; ++i) {
709: if (strcmp(rules[i].r_name,
710: rules[i + 1].r_name) != 0)
711: continue;
712: if (strcmp(rules[i].r_filename,
713: rules[i + 1].r_filename) == 0)
714: continue;
715: eat(rules[i].r_filename, rules[i].r_linenum);
716: warning(_("same rule name in multiple files"));
717: eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
718: warning(_("same rule name in multiple files"));
719: for (j = i + 2; j < nrules; ++j) {
720: if (strcmp(rules[i].r_name,
721: rules[j].r_name) != 0)
722: break;
723: if (strcmp(rules[i].r_filename,
724: rules[j].r_filename) == 0)
725: continue;
726: if (strcmp(rules[i + 1].r_filename,
727: rules[j].r_filename) == 0)
728: continue;
729: break;
730: }
731: i = j - 1;
732: }
733: }
1.1 jtc 734: for (i = 0; i < nzones; ++i) {
735: zp = &zones[i];
736: zp->z_rules = NULL;
737: zp->z_nrules = 0;
738: }
739: for (base = 0; base < nrules; base = out) {
740: rp = &rules[base];
741: for (out = base + 1; out < nrules; ++out)
742: if (strcmp(rp->r_name, rules[out].r_name) != 0)
743: break;
744: for (i = 0; i < nzones; ++i) {
745: zp = &zones[i];
746: if (strcmp(zp->z_rule, rp->r_name) != 0)
747: continue;
748: zp->z_rules = rp;
749: zp->z_nrules = out - base;
750: }
751: }
752: for (i = 0; i < nzones; ++i) {
753: zp = &zones[i];
754: if (zp->z_nrules == 0) {
755: /*
756: ** Maybe we have a local standard time offset.
757: */
758: eat(zp->z_filename, zp->z_linenum);
1.5 jtc 759: zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
760: TRUE);
1.1 jtc 761: /*
762: ** Note, though, that if there's no rule,
763: ** a '%s' in the format is a bad thing.
764: */
765: if (strchr(zp->z_format, '%') != 0)
1.5 jtc 766: error(_("%s in ruleless zone"));
1.1 jtc 767: }
768: }
769: if (errors)
770: (void) exit(EXIT_FAILURE);
771: }
772:
773: static void
774: infile(name)
775: const char * name;
776: {
777: register FILE * fp;
778: register char ** fields;
779: register char * cp;
780: register const struct lookup * lp;
781: register int nfields;
782: register int wantcont;
783: register int num;
784: char buf[BUFSIZ];
785:
786: if (strcmp(name, "-") == 0) {
1.5 jtc 787: name = _("standard input");
1.1 jtc 788: fp = stdin;
789: } else if ((fp = fopen(name, "r")) == NULL) {
1.5 jtc 790: const char *e = strerror(errno);
1.7 jtc 791:
1.5 jtc 792: (void) fprintf(stderr, _("%s: Can't open %s: %s\n"),
793: progname, name, e);
1.1 jtc 794: (void) exit(EXIT_FAILURE);
795: }
796: wantcont = FALSE;
797: for (num = 1; ; ++num) {
798: eat(name, num);
799: if (fgets(buf, (int) sizeof buf, fp) != buf)
800: break;
801: cp = strchr(buf, '\n');
802: if (cp == NULL) {
1.5 jtc 803: error(_("line too long"));
1.1 jtc 804: (void) exit(EXIT_FAILURE);
805: }
806: *cp = '\0';
807: fields = getfields(buf);
808: nfields = 0;
809: while (fields[nfields] != NULL) {
810: static char nada;
811:
1.3 jtc 812: if (strcmp(fields[nfields], "-") == 0)
1.1 jtc 813: fields[nfields] = &nada;
814: ++nfields;
815: }
816: if (nfields == 0) {
817: /* nothing to do */
818: } else if (wantcont) {
819: wantcont = inzcont(fields, nfields);
820: } else {
821: lp = byword(fields[0], line_codes);
822: if (lp == NULL)
1.5 jtc 823: error(_("input line of unknown type"));
1.1 jtc 824: else switch ((int) (lp->l_value)) {
825: case LC_RULE:
826: inrule(fields, nfields);
827: wantcont = FALSE;
828: break;
829: case LC_ZONE:
830: wantcont = inzone(fields, nfields);
831: break;
832: case LC_LINK:
833: inlink(fields, nfields);
834: wantcont = FALSE;
835: break;
836: case LC_LEAP:
837: if (name != leapsec)
838: (void) fprintf(stderr,
1.5 jtc 839: _("%s: Leap line in non leap seconds file %s\n"),
1.1 jtc 840: progname, name);
841: else inleap(fields, nfields);
842: wantcont = FALSE;
843: break;
844: default: /* "cannot happen" */
845: (void) fprintf(stderr,
1.5 jtc 846: _("%s: panic: Invalid l_value %d\n"),
1.1 jtc 847: progname, lp->l_value);
848: (void) exit(EXIT_FAILURE);
849: }
850: }
851: ifree((char *) fields);
852: }
853: if (ferror(fp)) {
1.5 jtc 854: (void) fprintf(stderr, _("%s: Error reading %s\n"),
855: progname, filename);
1.1 jtc 856: (void) exit(EXIT_FAILURE);
857: }
858: if (fp != stdin && fclose(fp)) {
1.5 jtc 859: const char *e = strerror(errno);
1.7 jtc 860:
1.5 jtc 861: (void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
862: progname, filename, e);
1.1 jtc 863: (void) exit(EXIT_FAILURE);
864: }
865: if (wantcont)
1.5 jtc 866: error(_("expected continuation line not found"));
1.1 jtc 867: }
868:
869: /*
870: ** Convert a string of one of the forms
871: ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
872: ** into a number of seconds.
873: ** A null string maps to zero.
874: ** Call error with errstring and return zero on errors.
875: */
876:
877: static long
878: gethms(string, errstring, signable)
879: const char * string;
880: const char * const errstring;
881: const int signable;
882: {
883: int hh, mm, ss, sign;
884:
885: if (string == NULL || *string == '\0')
886: return 0;
887: if (!signable)
888: sign = 1;
889: else if (*string == '-') {
890: sign = -1;
891: ++string;
892: } else sign = 1;
893: if (sscanf(string, scheck(string, "%d"), &hh) == 1)
894: mm = ss = 0;
895: else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
896: ss = 0;
897: else if (sscanf(string, scheck(string, "%d:%d:%d"),
898: &hh, &mm, &ss) != 3) {
899: error(errstring);
900: return 0;
901: }
902: if (hh < 0 || hh >= HOURSPERDAY ||
903: mm < 0 || mm >= MINSPERHOUR ||
904: ss < 0 || ss > SECSPERMIN) {
905: error(errstring);
906: return 0;
907: }
908: return eitol(sign) *
909: (eitol(hh * MINSPERHOUR + mm) *
910: eitol(SECSPERMIN) + eitol(ss));
911: }
912:
913: static void
914: inrule(fields, nfields)
915: register char ** const fields;
916: const int nfields;
917: {
918: static struct rule r;
919:
920: if (nfields != RULE_FIELDS) {
1.5 jtc 921: error(_("wrong number of fields on Rule line"));
1.1 jtc 922: return;
923: }
924: if (*fields[RF_NAME] == '\0') {
1.5 jtc 925: error(_("nameless rule"));
1.1 jtc 926: return;
927: }
928: r.r_filename = filename;
929: r.r_linenum = linenum;
1.5 jtc 930: r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
1.1 jtc 931: rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
932: fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
933: r.r_name = ecpyalloc(fields[RF_NAME]);
934: r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
935: rules = (struct rule *) (void *) erealloc((char *) rules,
936: (int) ((nrules + 1) * sizeof *rules));
937: rules[nrules++] = r;
938: }
939:
940: static int
941: inzone(fields, nfields)
942: register char ** const fields;
943: const int nfields;
944: {
945: register int i;
946: static char * buf;
947:
948: if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
1.5 jtc 949: error(_("wrong number of fields on Zone line"));
1.1 jtc 950: return FALSE;
951: }
952: if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
953: buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
1.6 mrg 954: (void)sprintf(buf, /* XXX: sprintf is safe */
1.5 jtc 955: _("\"Zone %s\" line and -l option are mutually exclusive"),
1.1 jtc 956: TZDEFAULT);
957: error(buf);
958: return FALSE;
959: }
960: if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
961: buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
1.6 mrg 962: (void)sprintf(buf, /* XXX: sprintf is safe */
1.5 jtc 963: _("\"Zone %s\" line and -p option are mutually exclusive"),
1.1 jtc 964: TZDEFRULES);
965: error(buf);
966: return FALSE;
967: }
968: for (i = 0; i < nzones; ++i)
969: if (zones[i].z_name != NULL &&
970: strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
971: buf = erealloc(buf, (int) (132 +
972: strlen(fields[ZF_NAME]) +
973: strlen(zones[i].z_filename)));
1.6 mrg 974: (void)sprintf(buf, /* XXX: sprintf is safe */
1.5 jtc 975: _("duplicate zone name %s (file \"%s\", line %d)"),
1.1 jtc 976: fields[ZF_NAME],
977: zones[i].z_filename,
978: zones[i].z_linenum);
979: error(buf);
980: return FALSE;
981: }
982: return inzsub(fields, nfields, FALSE);
983: }
984:
985: static int
986: inzcont(fields, nfields)
987: register char ** const fields;
988: const int nfields;
989: {
990: if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
1.5 jtc 991: error(_("wrong number of fields on Zone continuation line"));
1.1 jtc 992: return FALSE;
993: }
994: return inzsub(fields, nfields, TRUE);
995: }
996:
997: static int
998: inzsub(fields, nfields, iscont)
999: register char ** const fields;
1000: const int nfields;
1001: const int iscont;
1002: {
1003: register char * cp;
1004: static struct zone z;
1005: register int i_gmtoff, i_rule, i_format;
1006: register int i_untilyear, i_untilmonth;
1007: register int i_untilday, i_untiltime;
1008: register int hasuntil;
1009:
1010: if (iscont) {
1011: i_gmtoff = ZFC_GMTOFF;
1012: i_rule = ZFC_RULE;
1013: i_format = ZFC_FORMAT;
1014: i_untilyear = ZFC_TILYEAR;
1015: i_untilmonth = ZFC_TILMONTH;
1016: i_untilday = ZFC_TILDAY;
1017: i_untiltime = ZFC_TILTIME;
1018: z.z_name = NULL;
1019: } else {
1020: i_gmtoff = ZF_GMTOFF;
1021: i_rule = ZF_RULE;
1022: i_format = ZF_FORMAT;
1023: i_untilyear = ZF_TILYEAR;
1024: i_untilmonth = ZF_TILMONTH;
1025: i_untilday = ZF_TILDAY;
1026: i_untiltime = ZF_TILTIME;
1027: z.z_name = ecpyalloc(fields[ZF_NAME]);
1028: }
1029: z.z_filename = filename;
1030: z.z_linenum = linenum;
1.5 jtc 1031: z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid GMT offset"), TRUE);
1.1 jtc 1032: if ((cp = strchr(fields[i_format], '%')) != 0) {
1033: if (*++cp != 's' || strchr(cp, '%') != 0) {
1.5 jtc 1034: error(_("invalid abbreviation format"));
1.1 jtc 1035: return FALSE;
1036: }
1037: }
1038: z.z_rule = ecpyalloc(fields[i_rule]);
1039: z.z_format = ecpyalloc(fields[i_format]);
1040: hasuntil = nfields > i_untilyear;
1041: if (hasuntil) {
1042: z.z_untilrule.r_filename = filename;
1043: z.z_untilrule.r_linenum = linenum;
1044: rulesub(&z.z_untilrule,
1045: fields[i_untilyear],
1046: "only",
1047: "",
1048: (nfields > i_untilmonth) ?
1049: fields[i_untilmonth] : "Jan",
1050: (nfields > i_untilday) ? fields[i_untilday] : "1",
1051: (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1052: z.z_untiltime = rpytime(&z.z_untilrule,
1053: z.z_untilrule.r_loyear);
1054: if (iscont && nzones > 0 &&
1055: z.z_untiltime > min_time &&
1056: z.z_untiltime < max_time &&
1057: zones[nzones - 1].z_untiltime > min_time &&
1058: zones[nzones - 1].z_untiltime < max_time &&
1059: zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1.5 jtc 1060: error(_("Zone continuation line end time is not after end time of previous line"));
1.1 jtc 1061: return FALSE;
1062: }
1063: }
1064: zones = (struct zone *) (void *) erealloc((char *) zones,
1065: (int) ((nzones + 1) * sizeof *zones));
1066: zones[nzones++] = z;
1067: /*
1068: ** If there was an UNTIL field on this line,
1069: ** there's more information about the zone on the next line.
1070: */
1071: return hasuntil;
1072: }
1073:
1074: static void
1075: inleap(fields, nfields)
1076: register char ** const fields;
1077: const int nfields;
1078: {
1079: register const char * cp;
1080: register const struct lookup * lp;
1081: register int i, j;
1082: int year, month, day;
1083: long dayoff, tod;
1084: time_t t;
1085:
1086: if (nfields != LEAP_FIELDS) {
1.5 jtc 1087: error(_("wrong number of fields on Leap line"));
1.1 jtc 1088: return;
1089: }
1090: dayoff = 0;
1091: cp = fields[LP_YEAR];
1092: if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1093: /*
1094: * Leapin' Lizards!
1095: */
1.5 jtc 1096: error(_("invalid leaping year"));
1.1 jtc 1097: return;
1098: }
1099: j = EPOCH_YEAR;
1100: while (j != year) {
1101: if (year > j) {
1102: i = len_years[isleap(j)];
1103: ++j;
1104: } else {
1105: --j;
1106: i = -len_years[isleap(j)];
1107: }
1108: dayoff = oadd(dayoff, eitol(i));
1109: }
1110: if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1.5 jtc 1111: error(_("invalid month name"));
1.1 jtc 1112: return;
1113: }
1114: month = lp->l_value;
1115: j = TM_JANUARY;
1116: while (j != month) {
1117: i = len_months[isleap(year)][j];
1118: dayoff = oadd(dayoff, eitol(i));
1119: ++j;
1120: }
1121: cp = fields[LP_DAY];
1122: if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1123: day <= 0 || day > len_months[isleap(year)][month]) {
1.5 jtc 1124: error(_("invalid day of month"));
1.1 jtc 1125: return;
1126: }
1127: dayoff = oadd(dayoff, eitol(day - 1));
1.4 jtc 1128: if (dayoff < 0 && !TYPE_SIGNED(time_t)) {
1.5 jtc 1129: error(_("time before zero"));
1.1 jtc 1130: return;
1131: }
1132: t = (time_t) dayoff * SECSPERDAY;
1133: /*
1134: ** Cheap overflow check.
1135: */
1136: if (t / SECSPERDAY != dayoff) {
1.5 jtc 1137: error(_("time overflow"));
1.1 jtc 1138: return;
1139: }
1.5 jtc 1140: tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1.1 jtc 1141: cp = fields[LP_CORR];
1142: {
1143: register int positive;
1144: int count;
1145:
1146: if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1147: positive = FALSE;
1148: count = 1;
1149: } else if (strcmp(cp, "--") == 0) {
1150: positive = FALSE;
1151: count = 2;
1152: } else if (strcmp(cp, "+") == 0) {
1153: positive = TRUE;
1154: count = 1;
1155: } else if (strcmp(cp, "++") == 0) {
1156: positive = TRUE;
1157: count = 2;
1158: } else {
1.5 jtc 1159: error(_("illegal CORRECTION field on Leap line"));
1.1 jtc 1160: return;
1161: }
1162: if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1.5 jtc 1163: error(_("illegal Rolling/Stationary field on Leap line"));
1.1 jtc 1164: return;
1165: }
1166: leapadd(tadd(t, tod), positive, lp->l_value, count);
1167: }
1168: }
1169:
1170: static void
1171: inlink(fields, nfields)
1172: register char ** const fields;
1173: const int nfields;
1174: {
1175: struct link l;
1176:
1177: if (nfields != LINK_FIELDS) {
1.5 jtc 1178: error(_("wrong number of fields on Link line"));
1.1 jtc 1179: return;
1180: }
1181: if (*fields[LF_FROM] == '\0') {
1.5 jtc 1182: error(_("blank FROM field on Link line"));
1.1 jtc 1183: return;
1184: }
1185: if (*fields[LF_TO] == '\0') {
1.5 jtc 1186: error(_("blank TO field on Link line"));
1.1 jtc 1187: return;
1188: }
1189: l.l_filename = filename;
1190: l.l_linenum = linenum;
1191: l.l_from = ecpyalloc(fields[LF_FROM]);
1192: l.l_to = ecpyalloc(fields[LF_TO]);
1193: links = (struct link *) (void *) erealloc((char *) links,
1194: (int) ((nlinks + 1) * sizeof *links));
1195: links[nlinks++] = l;
1196: }
1197:
1198: static void
1199: rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1200: register struct rule * const rp;
1201: const char * const loyearp;
1202: const char * const hiyearp;
1203: const char * const typep;
1204: const char * const monthp;
1205: const char * const dayp;
1206: const char * const timep;
1207: {
1208: register const struct lookup * lp;
1209: register const char * cp;
1210: register char * dp;
1211: register char * ep;
1212:
1213: if ((lp = byword(monthp, mon_names)) == NULL) {
1.5 jtc 1214: error(_("invalid month name"));
1.1 jtc 1215: return;
1216: }
1217: rp->r_month = lp->l_value;
1218: rp->r_todisstd = FALSE;
1219: rp->r_todisgmt = FALSE;
1220: dp = ecpyalloc(timep);
1221: if (*dp != '\0') {
1222: ep = dp + strlen(dp) - 1;
1223: switch (lowerit(*ep)) {
1224: case 's': /* Standard */
1225: rp->r_todisstd = TRUE;
1226: rp->r_todisgmt = FALSE;
1227: *ep = '\0';
1228: break;
1229: case 'w': /* Wall */
1230: rp->r_todisstd = FALSE;
1231: rp->r_todisgmt = FALSE;
1232: *ep = '\0';
1.7 jtc 1233: break;
1.1 jtc 1234: case 'g': /* Greenwich */
1235: case 'u': /* Universal */
1236: case 'z': /* Zulu */
1237: rp->r_todisstd = TRUE;
1238: rp->r_todisgmt = TRUE;
1239: *ep = '\0';
1240: break;
1241: }
1242: }
1.5 jtc 1243: rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1.1 jtc 1244: ifree(dp);
1245: /*
1246: ** Year work.
1247: */
1248: cp = loyearp;
1249: lp = byword(cp, begin_years);
1250: if (lp != NULL) switch ((int) lp->l_value) {
1251: case YR_MINIMUM:
1.3 jtc 1252: rp->r_loyear = INT_MIN;
1.1 jtc 1253: break;
1254: case YR_MAXIMUM:
1.3 jtc 1255: rp->r_loyear = INT_MAX;
1.1 jtc 1256: break;
1257: default: /* "cannot happen" */
1258: (void) fprintf(stderr,
1.5 jtc 1259: _("%s: panic: Invalid l_value %d\n"),
1.1 jtc 1260: progname, lp->l_value);
1261: (void) exit(EXIT_FAILURE);
1262: } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1.5 jtc 1263: error(_("invalid starting year"));
1.1 jtc 1264: return;
1.7 jtc 1265: } else if (noise)
1266: if (rp->r_loyear < min_year_representable)
1267: warning(_("starting year too low to be represented"));
1268: else if (rp->r_loyear > max_year_representable)
1269: warning(_("starting year too high to be represented"));
1.1 jtc 1270: cp = hiyearp;
1271: if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1272: case YR_MINIMUM:
1.3 jtc 1273: rp->r_hiyear = INT_MIN;
1.1 jtc 1274: break;
1275: case YR_MAXIMUM:
1.3 jtc 1276: rp->r_hiyear = INT_MAX;
1.1 jtc 1277: break;
1278: case YR_ONLY:
1279: rp->r_hiyear = rp->r_loyear;
1280: break;
1281: default: /* "cannot happen" */
1282: (void) fprintf(stderr,
1.5 jtc 1283: _("%s: panic: Invalid l_value %d\n"),
1.1 jtc 1284: progname, lp->l_value);
1285: (void) exit(EXIT_FAILURE);
1286: } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1.5 jtc 1287: error(_("invalid ending year"));
1.1 jtc 1288: return;
1.7 jtc 1289: } else if (noise)
1290: if (rp->r_loyear < min_year_representable)
1291: warning(_("starting year too low to be represented"));
1292: else if (rp->r_loyear > max_year_representable)
1293: warning(_("starting year too high to be represented"));
1.1 jtc 1294: if (rp->r_loyear > rp->r_hiyear) {
1.5 jtc 1295: error(_("starting year greater than ending year"));
1.1 jtc 1296: return;
1297: }
1298: if (*typep == '\0')
1299: rp->r_yrtype = NULL;
1300: else {
1301: if (rp->r_loyear == rp->r_hiyear) {
1.5 jtc 1302: error(_("typed single year"));
1.1 jtc 1303: return;
1304: }
1305: rp->r_yrtype = ecpyalloc(typep);
1306: }
1.7 jtc 1307: if (rp->r_loyear < min_year && rp->r_loyear > 0)
1308: min_year = rp->r_loyear;
1.1 jtc 1309: /*
1310: ** Day work.
1311: ** Accept things such as:
1312: ** 1
1313: ** last-Sunday
1314: ** Sun<=20
1315: ** Sun>=7
1316: */
1317: dp = ecpyalloc(dayp);
1318: if ((lp = byword(dp, lasts)) != NULL) {
1319: rp->r_dycode = DC_DOWLEQ;
1320: rp->r_wday = lp->l_value;
1321: rp->r_dayofmonth = len_months[1][rp->r_month];
1322: } else {
1323: if ((ep = strchr(dp, '<')) != 0)
1324: rp->r_dycode = DC_DOWLEQ;
1325: else if ((ep = strchr(dp, '>')) != 0)
1326: rp->r_dycode = DC_DOWGEQ;
1327: else {
1328: ep = dp;
1329: rp->r_dycode = DC_DOM;
1330: }
1331: if (rp->r_dycode != DC_DOM) {
1332: *ep++ = 0;
1333: if (*ep++ != '=') {
1.5 jtc 1334: error(_("invalid day of month"));
1.1 jtc 1335: ifree(dp);
1336: return;
1337: }
1338: if ((lp = byword(dp, wday_names)) == NULL) {
1.5 jtc 1339: error(_("invalid weekday name"));
1.1 jtc 1340: ifree(dp);
1341: return;
1342: }
1343: rp->r_wday = lp->l_value;
1344: }
1345: if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1346: rp->r_dayofmonth <= 0 ||
1347: (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1.5 jtc 1348: error(_("invalid day of month"));
1.1 jtc 1349: ifree(dp);
1350: return;
1351: }
1352: }
1353: ifree(dp);
1354: }
1355:
1356: static void
1357: convert(val, buf)
1358: const long val;
1359: char * const buf;
1360: {
1361: register int i;
1362: register long shift;
1363:
1364: for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1365: buf[i] = val >> shift;
1366: }
1367:
1368: static void
1369: puttzcode(val, fp)
1370: const long val;
1371: FILE * const fp;
1372: {
1373: char buf[4];
1374:
1375: convert(val, buf);
1376: (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1377: }
1378:
1.5 jtc 1379: static int
1380: atcomp(avp, bvp)
1.10 ! lukem 1381: const void * avp;
! 1382: const void * bvp;
1.5 jtc 1383: {
1384: if (((struct attype *) avp)->at < ((struct attype *) bvp)->at)
1385: return -1;
1386: else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at)
1387: return 1;
1388: else return 0;
1389: }
1390:
1.1 jtc 1391: static void
1392: writezone(name)
1393: const char * const name;
1394: {
1395: register FILE * fp;
1396: register int i, j;
1397: static char * fullname;
1398: static struct tzhead tzh;
1.5 jtc 1399: time_t ats[TZ_MAX_TIMES];
1400: unsigned char types[TZ_MAX_TIMES];
1401:
1402: /*
1403: ** Sort.
1404: */
1405: if (timecnt > 1)
1406: (void) qsort((void *) attypes, (size_t) timecnt,
1407: (size_t) sizeof *attypes, atcomp);
1408: /*
1409: ** Optimize.
1410: */
1411: {
1412: int fromi;
1413: int toi;
1.1 jtc 1414:
1.5 jtc 1415: toi = 0;
1416: fromi = 0;
1.7 jtc 1417: while (fromi < timecnt && attypes[fromi].at < min_time)
1418: ++fromi;
1.5 jtc 1419: if (isdsts[0] == 0)
1.7 jtc 1420: while (fromi < timecnt && attypes[fromi].type == 0)
1.5 jtc 1421: ++fromi; /* handled by default rule */
1422: for ( ; fromi < timecnt; ++fromi) {
1423: if (toi != 0
1424: && ((attypes[fromi].at
1425: + gmtoffs[attypes[toi - 1].type])
1426: <= (attypes[toi - 1].at
1427: + gmtoffs[toi == 1 ? 0
1428: : attypes[toi - 2].type]))) {
1429: attypes[toi - 1].type = attypes[fromi].type;
1430: continue;
1431: }
1432: if (toi == 0 ||
1433: attypes[toi - 1].type != attypes[fromi].type)
1434: attypes[toi++] = attypes[fromi];
1435: }
1436: timecnt = toi;
1437: }
1438: /*
1439: ** Transfer.
1440: */
1441: for (i = 0; i < timecnt; ++i) {
1442: ats[i] = attypes[i].at;
1443: types[i] = attypes[i].type;
1444: }
1.1 jtc 1445: fullname = erealloc(fullname,
1446: (int) (strlen(directory) + 1 + strlen(name) + 1));
1.7 jtc 1447: (void) sprintf(fullname, "%s/%s", directory, name); /* XXX: sprintf is safe */
1448: /*
1449: ** Remove old file, if any, to snap links.
1450: */
1451: if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
1452: const char *e = strerror(errno);
1453:
1454: (void) fprintf(stderr, _("%s: Can't remove %s: %s\n"),
1455: progname, fullname, e);
1456: (void) exit(EXIT_FAILURE);
1457: }
1.1 jtc 1458: if ((fp = fopen(fullname, "wb")) == NULL) {
1459: if (mkdirs(fullname) != 0)
1460: (void) exit(EXIT_FAILURE);
1461: if ((fp = fopen(fullname, "wb")) == NULL) {
1.5 jtc 1462: const char *e = strerror(errno);
1.7 jtc 1463:
1.5 jtc 1464: (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1465: progname, fullname, e);
1.1 jtc 1466: (void) exit(EXIT_FAILURE);
1467: }
1468: }
1469: convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
1470: convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1471: convert(eitol(leapcnt), tzh.tzh_leapcnt);
1472: convert(eitol(timecnt), tzh.tzh_timecnt);
1473: convert(eitol(typecnt), tzh.tzh_typecnt);
1474: convert(eitol(charcnt), tzh.tzh_charcnt);
1.5 jtc 1475: #define DO(field) (void) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp)
1.1 jtc 1476: DO(tzh_reserved);
1477: DO(tzh_ttisgmtcnt);
1478: DO(tzh_ttisstdcnt);
1479: DO(tzh_leapcnt);
1480: DO(tzh_timecnt);
1481: DO(tzh_typecnt);
1482: DO(tzh_charcnt);
1483: #undef DO
1484: for (i = 0; i < timecnt; ++i) {
1485: j = leapcnt;
1486: while (--j >= 0)
1487: if (ats[i] >= trans[j]) {
1488: ats[i] = tadd(ats[i], corr[j]);
1489: break;
1490: }
1491: puttzcode((long) ats[i], fp);
1492: }
1493: if (timecnt > 0)
1494: (void) fwrite((void *) types, (size_t) sizeof types[0],
1495: (size_t) timecnt, fp);
1496: for (i = 0; i < typecnt; ++i) {
1497: puttzcode((long) gmtoffs[i], fp);
1498: (void) putc(isdsts[i], fp);
1499: (void) putc(abbrinds[i], fp);
1500: }
1501: if (charcnt != 0)
1502: (void) fwrite((void *) chars, (size_t) sizeof chars[0],
1503: (size_t) charcnt, fp);
1504: for (i = 0; i < leapcnt; ++i) {
1505: if (roll[i]) {
1506: if (timecnt == 0 || trans[i] < ats[0]) {
1507: j = 0;
1508: while (isdsts[j])
1509: if (++j >= typecnt) {
1510: j = 0;
1511: break;
1512: }
1513: } else {
1514: j = 1;
1515: while (j < timecnt && trans[i] >= ats[j])
1516: ++j;
1517: j = types[j - 1];
1518: }
1519: puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1520: } else puttzcode((long) trans[i], fp);
1521: puttzcode((long) corr[i], fp);
1522: }
1523: for (i = 0; i < typecnt; ++i)
1524: (void) putc(ttisstds[i], fp);
1525: for (i = 0; i < typecnt; ++i)
1526: (void) putc(ttisgmts[i], fp);
1527: if (ferror(fp) || fclose(fp)) {
1.5 jtc 1528: (void) fprintf(stderr, _("%s: Error writing %s\n"),
1529: progname, fullname);
1.1 jtc 1530: (void) exit(EXIT_FAILURE);
1531: }
1532: }
1533:
1534: static void
1.6 mrg 1535: doabbr(abbr, abbrlen, format, letters, isdst)
1.1 jtc 1536: char * const abbr;
1.6 mrg 1537: const int abbrlen;
1.1 jtc 1538: const char * const format;
1539: const char * const letters;
1540: const int isdst;
1541: {
1542: if (strchr(format, '/') == NULL) {
1543: if (letters == NULL)
1.6 mrg 1544: (void)strncpy(abbr, format, abbrlen - 1);
1545: else
1546: (void)snprintf(abbr, abbrlen, format, letters);
1.1 jtc 1547: } else if (isdst)
1.6 mrg 1548: (void)strncpy(abbr, strchr(format, '/') + 1, abbrlen - 1);
1.1 jtc 1549: else {
1.6 mrg 1550: (void)strncpy(abbr, format, abbrlen - 1);
1.1 jtc 1551: *strchr(abbr, '/') = '\0';
1552: }
1553: }
1554:
1555: static void
1556: outzone(zpfirst, zonecount)
1557: const struct zone * const zpfirst;
1558: const int zonecount;
1559: {
1560: register const struct zone * zp;
1561: register struct rule * rp;
1562: register int i, j;
1563: register int usestart, useuntil;
1564: register time_t starttime, untiltime;
1565: register long gmtoff;
1566: register long stdoff;
1567: register int year;
1568: register long startoff;
1569: register int startttisstd;
1570: register int startttisgmt;
1571: register int type;
1572: char startbuf[BUFSIZ];
1573:
1574: INITIALIZE(untiltime);
1575: INITIALIZE(starttime);
1576: /*
1577: ** Now. . .finally. . .generate some useful data!
1578: */
1579: timecnt = 0;
1580: typecnt = 0;
1581: charcnt = 0;
1582: /*
1583: ** A guess that may well be corrected later.
1584: */
1585: stdoff = 0;
1586: /*
1587: ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1588: ** for noting the need to unconditionally initialize startttisstd.
1589: */
1590: startttisstd = FALSE;
1591: startttisgmt = FALSE;
1592: for (i = 0; i < zonecount; ++i) {
1593: zp = &zpfirst[i];
1594: usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1595: useuntil = i < (zonecount - 1);
1596: if (useuntil && zp->z_untiltime <= min_time)
1597: continue;
1598: gmtoff = zp->z_gmtoff;
1599: eat(zp->z_filename, zp->z_linenum);
1.5 jtc 1600: *startbuf = '\0';
1601: startoff = zp->z_gmtoff;
1.1 jtc 1602: if (zp->z_nrules == 0) {
1603: stdoff = zp->z_stdoff;
1.6 mrg 1604: doabbr(startbuf, sizeof startbuf, zp->z_format,
1.1 jtc 1605: (char *) NULL, stdoff != 0);
1606: type = addtype(oadd(zp->z_gmtoff, stdoff),
1607: startbuf, stdoff != 0, startttisstd,
1608: startttisgmt);
1.5 jtc 1609: if (usestart) {
1.1 jtc 1610: addtt(starttime, type);
1.5 jtc 1611: usestart = FALSE;
1612: }
1.1 jtc 1613: else if (stdoff != 0)
1614: addtt(min_time, type);
1615: } else for (year = min_year; year <= max_year; ++year) {
1616: if (useuntil && year > zp->z_untilrule.r_hiyear)
1617: break;
1618: /*
1619: ** Mark which rules to do in the current year.
1620: ** For those to do, calculate rpytime(rp, year);
1621: */
1622: for (j = 0; j < zp->z_nrules; ++j) {
1623: rp = &zp->z_rules[j];
1624: eats(zp->z_filename, zp->z_linenum,
1625: rp->r_filename, rp->r_linenum);
1626: rp->r_todo = year >= rp->r_loyear &&
1627: year <= rp->r_hiyear &&
1628: yearistype(year, rp->r_yrtype);
1629: if (rp->r_todo)
1630: rp->r_temp = rpytime(rp, year);
1631: }
1632: for ( ; ; ) {
1633: register int k;
1634: register time_t jtime, ktime;
1635: register long offset;
1636: char buf[BUFSIZ];
1637:
1638: INITIALIZE(ktime);
1639: if (useuntil) {
1640: /*
1641: ** Turn untiltime into GMT
1642: ** assuming the current gmtoff and
1643: ** stdoff values.
1644: */
1645: untiltime = zp->z_untiltime;
1646: if (!zp->z_untilrule.r_todisgmt)
1647: untiltime = tadd(untiltime,
1648: -gmtoff);
1649: if (!zp->z_untilrule.r_todisstd)
1650: untiltime = tadd(untiltime,
1651: -stdoff);
1652: }
1653: /*
1654: ** Find the rule (of those to do, if any)
1655: ** that takes effect earliest in the year.
1656: */
1657: k = -1;
1658: for (j = 0; j < zp->z_nrules; ++j) {
1659: rp = &zp->z_rules[j];
1660: if (!rp->r_todo)
1661: continue;
1662: eats(zp->z_filename, zp->z_linenum,
1663: rp->r_filename, rp->r_linenum);
1664: offset = rp->r_todisgmt ? 0 : gmtoff;
1665: if (!rp->r_todisstd)
1666: offset = oadd(offset, stdoff);
1667: jtime = rp->r_temp;
1668: if (jtime == min_time ||
1669: jtime == max_time)
1670: continue;
1671: jtime = tadd(jtime, -offset);
1672: if (k < 0 || jtime < ktime) {
1673: k = j;
1674: ktime = jtime;
1675: }
1676: }
1677: if (k < 0)
1678: break; /* go on to next year */
1679: rp = &zp->z_rules[k];
1680: rp->r_todo = FALSE;
1681: if (useuntil && ktime >= untiltime)
1682: break;
1.5 jtc 1683: stdoff = rp->r_stdoff;
1684: if (usestart && ktime == starttime)
1685: usestart = FALSE;
1.1 jtc 1686: if (usestart) {
1.5 jtc 1687: if (ktime < starttime) {
1688: startoff = oadd(zp->z_gmtoff,
1689: stdoff);
1.6 mrg 1690: doabbr(startbuf,sizeof startbuf,
1691: zp->z_format,
1.5 jtc 1692: rp->r_abbrvar,
1693: rp->r_stdoff != 0);
1694: continue;
1695: }
1696: if (*startbuf == '\0' &&
1697: startoff == oadd(zp->z_gmtoff,
1698: stdoff)) {
1.6 mrg 1699: doabbr(startbuf,sizeof startbuf,
1700: zp->z_format,
1.5 jtc 1701: rp->r_abbrvar,
1702: rp->r_stdoff != 0);
1.1 jtc 1703: }
1704: }
1705: eats(zp->z_filename, zp->z_linenum,
1706: rp->r_filename, rp->r_linenum);
1.6 mrg 1707: doabbr(buf, sizeof buf, zp->z_format,
1708: rp->r_abbrvar, rp->r_stdoff != 0);
1.1 jtc 1709: offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1710: type = addtype(offset, buf, rp->r_stdoff != 0,
1711: rp->r_todisstd, rp->r_todisgmt);
1712: addtt(ktime, type);
1713: }
1714: }
1.5 jtc 1715: if (usestart) {
1716: if (*startbuf == '\0' &&
1717: zp->z_format != NULL &&
1718: strchr(zp->z_format, '%') == NULL &&
1719: strchr(zp->z_format, '/') == NULL)
1.6 mrg 1720: (void)strncpy(startbuf, zp->z_format,
1721: sizeof(startbuf) - 1);
1.5 jtc 1722: eat(zp->z_filename, zp->z_linenum);
1723: if (*startbuf == '\0')
1.7 jtc 1724: error(_("can't determine time zone abbreviation to use just after until time"));
1.5 jtc 1725: else addtt(starttime,
1726: addtype(startoff, startbuf,
1727: startoff != zp->z_gmtoff,
1728: startttisstd,
1729: startttisgmt));
1730: }
1.1 jtc 1731: /*
1732: ** Now we may get to set starttime for the next zone line.
1733: */
1734: if (useuntil) {
1735: startttisstd = zp->z_untilrule.r_todisstd;
1736: startttisgmt = zp->z_untilrule.r_todisgmt;
1.5 jtc 1737: starttime = zp->z_untiltime;
1.1 jtc 1738: if (!startttisstd)
1739: starttime = tadd(starttime, -stdoff);
1.5 jtc 1740: if (!startttisgmt)
1741: starttime = tadd(starttime, -gmtoff);
1.1 jtc 1742: }
1743: }
1744: writezone(zpfirst->z_name);
1745: }
1746:
1747: static void
1748: addtt(starttime, type)
1749: const time_t starttime;
1.7 jtc 1750: int type;
1.1 jtc 1751: {
1.7 jtc 1752: if (starttime <= min_time ||
1753: (timecnt == 1 && attypes[0].at < min_time)) {
1754: gmtoffs[0] = gmtoffs[type];
1755: isdsts[0] = isdsts[type];
1756: ttisstds[0] = ttisstds[type];
1757: ttisgmts[0] = ttisgmts[type];
1758: if (abbrinds[type] != 0)
1759: (void) strcpy(chars, &chars[abbrinds[type]]);
1760: abbrinds[0] = 0;
1761: charcnt = strlen(chars) + 1;
1762: typecnt = 1;
1763: timecnt = 0;
1764: type = 0;
1765: }
1.1 jtc 1766: if (timecnt >= TZ_MAX_TIMES) {
1.5 jtc 1767: error(_("too many transitions?!"));
1.1 jtc 1768: (void) exit(EXIT_FAILURE);
1769: }
1.5 jtc 1770: attypes[timecnt].at = starttime;
1771: attypes[timecnt].type = type;
1.1 jtc 1772: ++timecnt;
1773: }
1774:
1775: static int
1776: addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
1777: const long gmtoff;
1778: const char * const abbr;
1779: const int isdst;
1780: const int ttisstd;
1781: const int ttisgmt;
1782: {
1783: register int i, j;
1784:
1.5 jtc 1785: if (isdst != TRUE && isdst != FALSE) {
1786: error(_("internal error - addtype called with bad isdst"));
1787: (void) exit(EXIT_FAILURE);
1788: }
1789: if (ttisstd != TRUE && ttisstd != FALSE) {
1790: error(_("internal error - addtype called with bad ttisstd"));
1791: (void) exit(EXIT_FAILURE);
1792: }
1793: if (ttisgmt != TRUE && ttisgmt != FALSE) {
1794: error(_("internal error - addtype called with bad ttisgmt"));
1795: (void) exit(EXIT_FAILURE);
1796: }
1.1 jtc 1797: /*
1798: ** See if there's already an entry for this zone type.
1799: ** If so, just return its index.
1800: */
1801: for (i = 0; i < typecnt; ++i) {
1802: if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1803: strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1804: ttisstd == ttisstds[i] &&
1805: ttisgmt == ttisgmts[i])
1806: return i;
1807: }
1808: /*
1809: ** There isn't one; add a new one, unless there are already too
1810: ** many.
1811: */
1812: if (typecnt >= TZ_MAX_TYPES) {
1.5 jtc 1813: error(_("too many local time types"));
1.1 jtc 1814: (void) exit(EXIT_FAILURE);
1815: }
1816: gmtoffs[i] = gmtoff;
1817: isdsts[i] = isdst;
1818: ttisstds[i] = ttisstd;
1819: ttisgmts[i] = ttisgmt;
1820:
1821: for (j = 0; j < charcnt; ++j)
1822: if (strcmp(&chars[j], abbr) == 0)
1823: break;
1824: if (j == charcnt)
1825: newabbr(abbr);
1826: abbrinds[i] = j;
1827: ++typecnt;
1828: return i;
1829: }
1830:
1831: static void
1832: leapadd(t, positive, rolling, count)
1833: const time_t t;
1834: const int positive;
1835: const int rolling;
1836: int count;
1837: {
1838: register int i, j;
1839:
1840: if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1.5 jtc 1841: error(_("too many leap seconds"));
1.1 jtc 1842: (void) exit(EXIT_FAILURE);
1843: }
1844: for (i = 0; i < leapcnt; ++i)
1845: if (t <= trans[i]) {
1846: if (t == trans[i]) {
1.5 jtc 1847: error(_("repeated leap second moment"));
1.1 jtc 1848: (void) exit(EXIT_FAILURE);
1849: }
1850: break;
1851: }
1852: do {
1853: for (j = leapcnt; j > i; --j) {
1854: trans[j] = trans[j - 1];
1855: corr[j] = corr[j - 1];
1856: roll[j] = roll[j - 1];
1857: }
1858: trans[i] = t;
1859: corr[i] = positive ? 1L : eitol(-count);
1860: roll[i] = rolling;
1861: ++leapcnt;
1862: } while (positive && --count != 0);
1863: }
1864:
1865: static void
1866: adjleap P((void))
1867: {
1868: register int i;
1869: register long last = 0;
1870:
1871: /*
1872: ** propagate leap seconds forward
1873: */
1874: for (i = 0; i < leapcnt; ++i) {
1875: trans[i] = tadd(trans[i], last);
1876: last = corr[i] += last;
1877: }
1878: }
1879:
1880: static int
1881: yearistype(year, type)
1882: const int year;
1883: const char * const type;
1884: {
1885: static char * buf;
1886: int result;
1887:
1888: if (type == NULL || *type == '\0')
1889: return TRUE;
1890: buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
1.6 mrg 1891: (void)sprintf(buf, "%s %d %s", yitcommand, year, type); /* XXX: sprintf is safe */
1.1 jtc 1892: result = system(buf);
1893: if (result == 0)
1894: return TRUE;
1895: if (result == (1 << 8))
1896: return FALSE;
1.5 jtc 1897: error(_("Wild result from command execution"));
1898: (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
1.1 jtc 1899: progname, buf, result);
1900: for ( ; ; )
1901: (void) exit(EXIT_FAILURE);
1902: }
1903:
1904: static int
1905: lowerit(a)
1.3 jtc 1906: int a;
1.1 jtc 1907: {
1.3 jtc 1908: a = (unsigned char) a;
1.1 jtc 1909: return (isascii(a) && isupper(a)) ? tolower(a) : a;
1910: }
1911:
1912: static int
1913: ciequal(ap, bp) /* case-insensitive equality */
1914: register const char * ap;
1915: register const char * bp;
1916: {
1917: while (lowerit(*ap) == lowerit(*bp++))
1918: if (*ap++ == '\0')
1919: return TRUE;
1920: return FALSE;
1921: }
1922:
1923: static int
1924: itsabbr(abbr, word)
1925: register const char * abbr;
1926: register const char * word;
1927: {
1928: if (lowerit(*abbr) != lowerit(*word))
1929: return FALSE;
1930: ++word;
1931: while (*++abbr != '\0')
1.3 jtc 1932: do {
1933: if (*word == '\0')
1934: return FALSE;
1935: } while (lowerit(*word++) != lowerit(*abbr));
1.1 jtc 1936: return TRUE;
1937: }
1938:
1939: static const struct lookup *
1940: byword(word, table)
1941: register const char * const word;
1942: register const struct lookup * const table;
1943: {
1944: register const struct lookup * foundlp;
1945: register const struct lookup * lp;
1946:
1947: if (word == NULL || table == NULL)
1948: return NULL;
1949: /*
1950: ** Look for exact match.
1951: */
1952: for (lp = table; lp->l_word != NULL; ++lp)
1953: if (ciequal(word, lp->l_word))
1954: return lp;
1955: /*
1956: ** Look for inexact match.
1957: */
1958: foundlp = NULL;
1959: for (lp = table; lp->l_word != NULL; ++lp)
1960: if (itsabbr(word, lp->l_word))
1961: if (foundlp == NULL)
1962: foundlp = lp;
1963: else return NULL; /* multiple inexact matches */
1964: return foundlp;
1965: }
1966:
1967: static char **
1968: getfields(cp)
1969: register char * cp;
1970: {
1971: register char * dp;
1972: register char ** array;
1973: register int nsubs;
1974:
1975: if (cp == NULL)
1976: return NULL;
1977: array = (char **) (void *)
1978: emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1979: nsubs = 0;
1980: for ( ; ; ) {
1.3 jtc 1981: while (isascii(*cp) && isspace((unsigned char) *cp))
1.1 jtc 1982: ++cp;
1983: if (*cp == '\0' || *cp == '#')
1984: break;
1985: array[nsubs++] = dp = cp;
1986: do {
1987: if ((*dp = *cp++) != '"')
1988: ++dp;
1989: else while ((*dp = *cp++) != '"')
1990: if (*dp != '\0')
1991: ++dp;
1.5 jtc 1992: else error(_("Odd number of quotation marks"));
1.1 jtc 1993: } while (*cp != '\0' && *cp != '#' &&
1.3 jtc 1994: (!isascii(*cp) || !isspace((unsigned char) *cp)));
1995: if (isascii(*cp) && isspace((unsigned char) *cp))
1.1 jtc 1996: ++cp;
1997: *dp = '\0';
1998: }
1999: array[nsubs] = NULL;
2000: return array;
2001: }
2002:
2003: static long
2004: oadd(t1, t2)
2005: const long t1;
2006: const long t2;
2007: {
2008: register long t;
2009:
2010: t = t1 + t2;
2011: if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1.5 jtc 2012: error(_("time overflow"));
1.1 jtc 2013: (void) exit(EXIT_FAILURE);
2014: }
2015: return t;
2016: }
2017:
2018: static time_t
2019: tadd(t1, t2)
2020: const time_t t1;
2021: const long t2;
2022: {
2023: register time_t t;
2024:
2025: if (t1 == max_time && t2 > 0)
2026: return max_time;
2027: if (t1 == min_time && t2 < 0)
2028: return min_time;
2029: t = t1 + t2;
2030: if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
1.5 jtc 2031: error(_("time overflow"));
1.1 jtc 2032: (void) exit(EXIT_FAILURE);
2033: }
2034: return t;
2035: }
2036:
2037: /*
2038: ** Given a rule, and a year, compute the date - in seconds since January 1,
2039: ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2040: */
2041:
2042: static time_t
2043: rpytime(rp, wantedy)
2044: register const struct rule * const rp;
2045: register const int wantedy;
2046: {
2047: register int y, m, i;
2048: register long dayoff; /* with a nod to Margaret O. */
2049: register time_t t;
2050:
1.3 jtc 2051: if (wantedy == INT_MIN)
1.1 jtc 2052: return min_time;
1.3 jtc 2053: if (wantedy == INT_MAX)
1.1 jtc 2054: return max_time;
2055: dayoff = 0;
2056: m = TM_JANUARY;
2057: y = EPOCH_YEAR;
2058: while (wantedy != y) {
2059: if (wantedy > y) {
2060: i = len_years[isleap(y)];
2061: ++y;
2062: } else {
2063: --y;
2064: i = -len_years[isleap(y)];
2065: }
2066: dayoff = oadd(dayoff, eitol(i));
2067: }
2068: while (m != rp->r_month) {
2069: i = len_months[isleap(y)][m];
2070: dayoff = oadd(dayoff, eitol(i));
2071: ++m;
2072: }
2073: i = rp->r_dayofmonth;
2074: if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2075: if (rp->r_dycode == DC_DOWLEQ)
2076: --i;
2077: else {
1.5 jtc 2078: error(_("use of 2/29 in non leap-year"));
1.1 jtc 2079: (void) exit(EXIT_FAILURE);
2080: }
2081: }
2082: --i;
2083: dayoff = oadd(dayoff, eitol(i));
2084: if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2085: register long wday;
2086:
2087: #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2088: wday = eitol(EPOCH_WDAY);
2089: /*
2090: ** Don't trust mod of negative numbers.
2091: */
2092: if (dayoff >= 0)
2093: wday = (wday + dayoff) % LDAYSPERWEEK;
2094: else {
2095: wday -= ((-dayoff) % LDAYSPERWEEK);
2096: if (wday < 0)
2097: wday += LDAYSPERWEEK;
2098: }
2099: while (wday != eitol(rp->r_wday))
2100: if (rp->r_dycode == DC_DOWGEQ) {
2101: dayoff = oadd(dayoff, (long) 1);
2102: if (++wday >= LDAYSPERWEEK)
2103: wday = 0;
2104: ++i;
2105: } else {
2106: dayoff = oadd(dayoff, (long) -1);
2107: if (--wday < 0)
2108: wday = LDAYSPERWEEK - 1;
2109: --i;
2110: }
2111: if (i < 0 || i >= len_months[isleap(y)][m]) {
1.5 jtc 2112: error(_("no day in month matches rule"));
1.1 jtc 2113: (void) exit(EXIT_FAILURE);
2114: }
2115: }
1.4 jtc 2116: if (dayoff < 0 && !TYPE_SIGNED(time_t))
1.1 jtc 2117: return min_time;
2118: t = (time_t) dayoff * SECSPERDAY;
2119: /*
2120: ** Cheap overflow check.
2121: */
2122: if (t / SECSPERDAY != dayoff)
2123: return (dayoff > 0) ? max_time : min_time;
2124: return tadd(t, rp->r_tod);
2125: }
2126:
2127: static void
2128: newabbr(string)
2129: const char * const string;
2130: {
2131: register int i;
2132:
2133: i = strlen(string) + 1;
2134: if (charcnt + i > TZ_MAX_CHARS) {
1.5 jtc 2135: error(_("too many, or too long, time zone abbreviations"));
1.1 jtc 2136: (void) exit(EXIT_FAILURE);
2137: }
1.6 mrg 2138: (void)strncpy(&chars[charcnt], string, sizeof(chars) - charcnt - 1);
1.1 jtc 2139: charcnt += eitol(i);
2140: }
2141:
2142: static int
2143: mkdirs(argname)
2144: char * const argname;
2145: {
2146: register char * name;
2147: register char * cp;
2148:
2149: if (argname == NULL || *argname == '\0')
2150: return 0;
2151: cp = name = ecpyalloc(argname);
2152: while ((cp = strchr(cp + 1, '/')) != 0) {
2153: *cp = '\0';
2154: #ifndef unix
2155: /*
2156: ** DOS drive specifier?
2157: */
1.3 jtc 2158: if (isalpha((unsigned char) name[0]) &&
1.4 jtc 2159: name[1] == ':' && name[2] == '\0') {
1.1 jtc 2160: *cp = '/';
2161: continue;
2162: }
2163: #endif /* !defined unix */
2164: if (!itsdir(name)) {
2165: /*
2166: ** It doesn't seem to exist, so we try to create it.
1.7 jtc 2167: ** Creation may fail because of the directory being
2168: ** created by some other multiprocessor, so we get
2169: ** to do extra checking.
1.1 jtc 2170: */
1.7 jtc 2171: if (mkdir(name, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) != 0) {
1.5 jtc 2172: const char *e = strerror(errno);
1.7 jtc 2173:
2174: if (errno != EEXIST || !itsdir(name)) {
2175: (void) fprintf(stderr,
2176: _("%s: Can't create directory %s: %s\n"),
2177: progname, name, e);
2178: ifree(name);
2179: return -1;
2180: }
1.1 jtc 2181: }
2182: }
2183: *cp = '/';
2184: }
2185: ifree(name);
2186: return 0;
2187: }
2188:
2189: static long
2190: eitol(i)
2191: const int i;
2192: {
2193: long l;
2194:
2195: l = i;
2196: if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2197: (void) fprintf(stderr,
1.5 jtc 2198: _("%s: %d did not sign extend correctly\n"),
1.1 jtc 2199: progname, i);
2200: (void) exit(EXIT_FAILURE);
2201: }
2202: return l;
2203: }
2204:
2205: /*
2206: ** UNIX was a registered trademark of UNIX System Laboratories in 1993.
2207: */
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