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(_ISwbit): Protext use of parameter with parentheses.
[glibc.git] / timezone / zic.c
blobb6b43c7c172d6a0a9063ed34c2974c7a379689ec
1 #ifndef lint
2 #ifndef NOID
3 static char elsieid[] = "@(#)zic.c 7.95";
4 #endif /* !defined NOID */
5 #endif /* !defined lint */
6
7 #include "private.h"
8 #include "locale.h"
9 #include "tzfile.h"
10 #ifdef unix
11 #include "sys/stat.h" /* for umask manifest constants */
12 #endif /* defined unix */
13
14 /*
15 ** On some ancient hosts, predicates like `isspace(C)' are defined
16 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
17 ** which says they are defined only if C == ((unsigned char) C) || C == EOF.
18 ** Neither the C Standard nor Posix require that `isascii' exist.
19 ** For portability, we check both ancient and modern requirements.
20 ** If isascii is not defined, the isascii check succeeds trivially.
21 */
22 #include "ctype.h"
23 #ifndef isascii
24 #define isascii(x) 1
25 #endif
26
27 struct rule {
28 const char * r_filename;
29 int r_linenum;
30 const char * r_name;
31
32 int r_loyear; /* for example, 1986 */
33 int r_hiyear; /* for example, 1986 */
34 const char * r_yrtype;
35
36 int r_month; /* 0..11 */
37
38 int r_dycode; /* see below */
39 int r_dayofmonth;
40 int r_wday;
41
42 long r_tod; /* time from midnight */
43 int r_todisstd; /* above is standard time if TRUE */
44 /* or wall clock time if FALSE */
45 int r_todisgmt; /* above is GMT if TRUE */
46 /* or local time if FALSE */
47 long r_stdoff; /* offset from standard time */
48 const char * r_abbrvar; /* variable part of abbreviation */
49
50 int r_todo; /* a rule to do (used in outzone) */
51 time_t r_temp; /* used in outzone */
52 };
53
54 /*
55 ** r_dycode r_dayofmonth r_wday
56 */
57
58 #define DC_DOM 0 /* 1..31 */ /* unused */
59 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
60 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
61
62 struct zone {
63 const char * z_filename;
64 int z_linenum;
65
66 const char * z_name;
67 long z_gmtoff;
68 const char * z_rule;
69 const char * z_format;
70
71 long z_stdoff;
72
73 struct rule * z_rules;
74 int z_nrules;
75
76 struct rule z_untilrule;
77 time_t z_untiltime;
78 };
79
80 extern int getopt P((int argc, char * const argv[],
81 const char * options));
82 extern int link P((const char * fromname, const char * toname));
83 extern char * optarg;
84 extern int optind;
85
86 static void addtt P((time_t starttime, int type));
87 static int addtype P((long gmtoff, const char * abbr, int isdst,
88 int ttisstd, int ttisgmt));
89 static void leapadd P((time_t t, int positive, int rolling, int count));
90 static void adjleap P((void));
91 static void associate P((void));
92 static int ciequal P((const char * ap, const char * bp));
93 static void convert P((long val, char * buf));
94 static void dolink P((const char * fromfile, const char * tofile));
95 static void doabbr P((char * abbr, const char * format,
96 const char * letters, int isdst));
97 static void eat P((const char * name, int num));
98 static void eats P((const char * name, int num,
99 const char * rname, int rnum));
100 static long eitol P((int i));
101 static void error P((const char * message));
102 static char ** getfields P((char * buf));
103 static long gethms P((const char * string, const char * errstrng,
104 int signable));
105 static void infile P((const char * filename));
106 static void inleap P((char ** fields, int nfields));
107 static void inlink P((char ** fields, int nfields));
108 static void inrule P((char ** fields, int nfields));
109 static int inzcont P((char ** fields, int nfields));
110 static int inzone P((char ** fields, int nfields));
111 static int inzsub P((char ** fields, int nfields, int iscont));
112 static int itsabbr P((const char * abbr, const char * word));
113 static int itsdir P((const char * name));
114 static int lowerit P((int c));
115 static char * memcheck P((char * tocheck));
116 static int mkdirs P((char * filename));
117 static void newabbr P((const char * abbr));
118 static long oadd P((long t1, long t2));
119 static void outzone P((const struct zone * zp, int ntzones));
120 static void puttzcode P((long code, FILE * fp));
121 static int rcomp P((const void * leftp, const void * rightp));
122 static time_t rpytime P((const struct rule * rp, int wantedy));
123 static void rulesub P((struct rule * rp,
124 const char * loyearp, const char * hiyearp,
125 const char * typep, const char * monthp,
126 const char * dayp, const char * timep));
127 static void setboundaries P((void));
128 static time_t tadd P((time_t t1, long t2));
129 static void usage P((void));
130 static void writezone P((const char * name));
131 static int yearistype P((int year, const char * type));
132
133 #if !(HAVE_STRERROR - 0)
134 static char * strerror P((int));
135 #endif /* !(HAVE_STRERROR - 0) */
136
137 static int charcnt;
138 static int errors;
139 static const char * filename;
140 static int leapcnt;
141 static int linenum;
142 static time_t max_time;
143 static int max_year;
144 static int max_year_representable;
145 static time_t min_time;
146 static int min_year;
147 static int min_year_representable;
148 static int noise;
149 static const char * rfilename;
150 static int rlinenum;
151 static const char * progname;
152 static int timecnt;
153 static int typecnt;
154
155 /*
156 ** Line codes.
157 */
158
159 #define LC_RULE 0
160 #define LC_ZONE 1
161 #define LC_LINK 2
162 #define LC_LEAP 3
163
164 /*
165 ** Which fields are which on a Zone line.
166 */
167
168 #define ZF_NAME 1
169 #define ZF_GMTOFF 2
170 #define ZF_RULE 3
171 #define ZF_FORMAT 4
172 #define ZF_TILYEAR 5
173 #define ZF_TILMONTH 6
174 #define ZF_TILDAY 7
175 #define ZF_TILTIME 8
176 #define ZONE_MINFIELDS 5
177 #define ZONE_MAXFIELDS 9
178
179 /*
180 ** Which fields are which on a Zone continuation line.
181 */
182
183 #define ZFC_GMTOFF 0
184 #define ZFC_RULE 1
185 #define ZFC_FORMAT 2
186 #define ZFC_TILYEAR 3
187 #define ZFC_TILMONTH 4
188 #define ZFC_TILDAY 5
189 #define ZFC_TILTIME 6
190 #define ZONEC_MINFIELDS 3
191 #define ZONEC_MAXFIELDS 7
192
193 /*
194 ** Which files are which on a Rule line.
195 */
196
197 #define RF_NAME 1
198 #define RF_LOYEAR 2
199 #define RF_HIYEAR 3
200 #define RF_COMMAND 4
201 #define RF_MONTH 5
202 #define RF_DAY 6
203 #define RF_TOD 7
204 #define RF_STDOFF 8
205 #define RF_ABBRVAR 9
206 #define RULE_FIELDS 10
207
208 /*
209 ** Which fields are which on a Link line.
210 */
211
212 #define LF_FROM 1
213 #define LF_TO 2
214 #define LINK_FIELDS 3
215
216 /*
217 ** Which fields are which on a Leap line.
218 */
219
220 #define LP_YEAR 1
221 #define LP_MONTH 2
222 #define LP_DAY 3
223 #define LP_TIME 4
224 #define LP_CORR 5
225 #define LP_ROLL 6
226 #define LEAP_FIELDS 7
227
228 /*
229 ** Year synonyms.
230 */
231
232 #define YR_MINIMUM 0
233 #define YR_MAXIMUM 1
234 #define YR_ONLY 2
235
236 static struct rule * rules;
237 static int nrules; /* number of rules */
238
239 static struct zone * zones;
240 static int nzones; /* number of zones */
241
242 struct link {
243 const char * l_filename;
244 int l_linenum;
245 const char * l_from;
246 const char * l_to;
247 };
248
249 static struct link * links;
250 static int nlinks;
251
252 struct lookup {
253 const char * l_word;
254 const int l_value;
255 };
256
257 static struct lookup const * byword P((const char * string,
258 const struct lookup * lp));
259
260 static struct lookup const line_codes[] = {
261 { "Rule", LC_RULE },
262 { "Zone", LC_ZONE },
263 { "Link", LC_LINK },
264 { "Leap", LC_LEAP },
265 { NULL, 0}
266 };
267
268 static struct lookup const mon_names[] = {
269 { "January", TM_JANUARY },
270 { "February", TM_FEBRUARY },
271 { "March", TM_MARCH },
272 { "April", TM_APRIL },
273 { "May", TM_MAY },
274 { "June", TM_JUNE },
275 { "July", TM_JULY },
276 { "August", TM_AUGUST },
277 { "September", TM_SEPTEMBER },
278 { "October", TM_OCTOBER },
279 { "November", TM_NOVEMBER },
280 { "December", TM_DECEMBER },
281 { NULL, 0 }
282 };
283
284 static struct lookup const wday_names[] = {
285 { "Sunday", TM_SUNDAY },
286 { "Monday", TM_MONDAY },
287 { "Tuesday", TM_TUESDAY },
288 { "Wednesday", TM_WEDNESDAY },
289 { "Thursday", TM_THURSDAY },
290 { "Friday", TM_FRIDAY },
291 { "Saturday", TM_SATURDAY },
292 { NULL, 0 }
293 };
294
295 static struct lookup const lasts[] = {
296 { "last-Sunday", TM_SUNDAY },
297 { "last-Monday", TM_MONDAY },
298 { "last-Tuesday", TM_TUESDAY },
299 { "last-Wednesday", TM_WEDNESDAY },
300 { "last-Thursday", TM_THURSDAY },
301 { "last-Friday", TM_FRIDAY },
302 { "last-Saturday", TM_SATURDAY },
303 { NULL, 0 }
304 };
305
306 static struct lookup const begin_years[] = {
307 { "minimum", YR_MINIMUM },
308 { "maximum", YR_MAXIMUM },
309 { NULL, 0 }
310 };
311
312 static struct lookup const end_years[] = {
313 { "minimum", YR_MINIMUM },
314 { "maximum", YR_MAXIMUM },
315 { "only", YR_ONLY },
316 { NULL, 0 }
317 };
318
319 static struct lookup const leap_types[] = {
320 { "Rolling", TRUE },
321 { "Stationary", FALSE },
322 { NULL, 0 }
323 };
324
325 static const int len_months[2][MONSPERYEAR] = {
326 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
327 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
328 };
329
330 static const int len_years[2] = {
331 DAYSPERNYEAR, DAYSPERLYEAR
332 };
333
334 static struct attype {
335 time_t at;
336 unsigned char type;
337 } attypes[TZ_MAX_TIMES];
338 static long gmtoffs[TZ_MAX_TYPES];
339 static char isdsts[TZ_MAX_TYPES];
340 static unsigned char abbrinds[TZ_MAX_TYPES];
341 static char ttisstds[TZ_MAX_TYPES];
342 static char ttisgmts[TZ_MAX_TYPES];
343 static char chars[TZ_MAX_CHARS];
344 static time_t trans[TZ_MAX_LEAPS];
345 static long corr[TZ_MAX_LEAPS];
346 static char roll[TZ_MAX_LEAPS];
347
348 /*
349 ** Memory allocation.
350 */
351
352 static char *
353 memcheck(ptr)
354 char * const ptr;
355 {
356 if (ptr == NULL) {
357 const char *e = strerror(errno);
358
359 (void) fprintf(stderr, _("%s: Memory exhausted: %s\n"),
360 progname, e);
361 (void) exit(EXIT_FAILURE);
362 }
363 return ptr;
364 }
365
366 #define emalloc(size) memcheck(imalloc(size))
367 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
368 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
369 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
370
371 /*
372 ** Error handling.
373 */
374
375 #if !(HAVE_STRERROR - 0)
376 static char *
377 strerror(errnum)
378 int errnum;
379 {
380 extern char * sys_errlist[];
381 extern int sys_nerr;
382
383 return (errnum > 0 && errnum <= sys_nerr) ?
384 sys_errlist[errnum] : "Unknown system error";
385 }
386 #endif /* !(HAVE_STRERROR - 0) */
387
388 static void
389 eats(name, num, rname, rnum)
390 const char * const name;
391 const int num;
392 const char * const rname;
393 const int rnum;
394 {
395 filename = name;
396 linenum = num;
397 rfilename = rname;
398 rlinenum = rnum;
399 }
400
401 static void
402 eat(name, num)
403 const char * const name;
404 const int num;
405 {
406 eats(name, num, (char *) NULL, -1);
407 }
408
409 static void
410 error(string)
411 const char * const string;
412 {
413 /*
414 ** Match the format of "cc" to allow sh users to
415 ** zic ... 2>&1 | error -t "*" -v
416 ** on BSD systems.
417 */
418 (void) fprintf(stderr, _("\"%s\", line %d: %s"),
419 filename, linenum, string);
420 if (rfilename != NULL)
421 (void) fprintf(stderr, _(" (rule from \"%s\", line %d)"),
422 rfilename, rlinenum);
423 (void) fprintf(stderr, "\n");
424 ++errors;
425 }
426
427 static void
428 warning(string)
429 const char * const string;
430 {
431 char * cp;
432
433 cp = ecpyalloc("warning: ");
434 cp = ecatalloc(cp, string);
435 error(cp);
436 ifree(cp);
437 --errors;
438 }
439
440 static void
441 usage P((void))
442 {
443 (void) fprintf(stderr, _("%s: usage is %s [ -s ] [ -v ] [ -l localtime ] [ -p posixrules ] [ -d directory ]\n\t[ -L leapseconds ] [ -y yearistype ] [ filename ... ]\n"),
444 progname, progname);
445 (void) exit(EXIT_FAILURE);
446 }
447
448 static const char * psxrules;
449 static const char * lcltime;
450 static const char * directory;
451 static const char * leapsec;
452 static const char * yitcommand;
453 static int sflag = FALSE;
454
455 int
456 main(argc, argv)
457 int argc;
458 char * argv[];
459 {
460 register int i;
461 register int j;
462 register int c;
463
464 #ifdef unix
465 (void) umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
466 #endif /* defined unix */
467 #if HAVE_GETTEXT - 0
468 (void) setlocale(LC_MESSAGES, "");
469 #ifdef TZ_DOMAINDIR
470 (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
471 #endif /* defined TEXTDOMAINDIR */
472 (void) textdomain(TZ_DOMAIN);
473 #endif /* HAVE_GETTEXT - 0 */
474 progname = argv[0];
475 while ((c = getopt(argc, argv, "d:l:p:L:vsy:")) != EOF && c != -1)
476 switch (c) {
477 default:
478 usage();
479 case 'd':
480 if (directory == NULL)
481 directory = optarg;
482 else {
483 (void) fprintf(stderr,
484 _("%s: More than one -d option specified\n"),
485 progname);
486 (void) exit(EXIT_FAILURE);
487 }
488 break;
489 case 'l':
490 if (lcltime == NULL)
491 lcltime = optarg;
492 else {
493 (void) fprintf(stderr,
494 _("%s: More than one -l option specified\n"),
495 progname);
496 (void) exit(EXIT_FAILURE);
497 }
498 break;
499 case 'p':
500 if (psxrules == NULL)
501 psxrules = optarg;
502 else {
503 (void) fprintf(stderr,
504 _("%s: More than one -p option specified\n"),
505 progname);
506 (void) exit(EXIT_FAILURE);
507 }
508 break;
509 case 'y':
510 if (yitcommand == NULL)
511 yitcommand = optarg;
512 else {
513 (void) fprintf(stderr,
514 _("%s: More than one -y option specified\n"),
515 progname);
516 (void) exit(EXIT_FAILURE);
517 }
518 break;
519 case 'L':
520 if (leapsec == NULL)
521 leapsec = optarg;
522 else {
523 (void) fprintf(stderr,
524 _("%s: More than one -L option specified\n"),
525 progname);
526 (void) exit(EXIT_FAILURE);
527 }
528 break;
529 case 'v':
530 noise = TRUE;
531 break;
532 case 's':
533 sflag = TRUE;
534 break;
535 }
536 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
537 usage(); /* usage message by request */
538 if (directory == NULL)
539 directory = TZDIR;
540 if (yitcommand == NULL)
541 yitcommand = "yearistype";
542
543 setboundaries();
544
545 if (optind < argc && leapsec != NULL) {
546 infile(leapsec);
547 adjleap();
548 }
549
550 for (i = optind; i < argc; ++i)
551 infile(argv[i]);
552 if (errors)
553 (void) exit(EXIT_FAILURE);
554 associate();
555 for (i = 0; i < nzones; i = j) {
556 /*
557 ** Find the next non-continuation zone entry.
558 */
559 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
560 continue;
561 outzone(&zones[i], j - i);
562 }
563 /*
564 ** Make links.
565 */
566 for (i = 0; i < nlinks; ++i)
567 dolink(links[i].l_from, links[i].l_to);
568 if (lcltime != NULL)
569 dolink(lcltime, TZDEFAULT);
570 if (psxrules != NULL)
571 dolink(psxrules, TZDEFRULES);
572 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
573 }
574
575 static void
576 dolink(fromfile, tofile)
577 const char * const fromfile;
578 const char * const tofile;
579 {
580 register char * fromname;
581 register char * toname;
582
583 if (fromfile[0] == '/')
584 fromname = ecpyalloc(fromfile);
585 else {
586 fromname = ecpyalloc(directory);
587 fromname = ecatalloc(fromname, "/");
588 fromname = ecatalloc(fromname, fromfile);
589 }
590 if (tofile[0] == '/')
591 toname = ecpyalloc(tofile);
592 else {
593 toname = ecpyalloc(directory);
594 toname = ecatalloc(toname, "/");
595 toname = ecatalloc(toname, tofile);
596 }
597 /*
598 ** We get to be careful here since
599 ** there's a fair chance of root running us.
600 */
601 if (!itsdir(toname))
602 (void) remove(toname);
603 if (link(fromname, toname) != 0) {
604 int result;
605
606 if (mkdirs(toname) != 0)
607 (void) exit(EXIT_FAILURE);
608 result = link(fromname, toname);
609 #if (HAVE_SYMLINK - 0)
610 if (result != 0) {
611 result = symlink(fromname, toname);
612 if (result == 0)
613 warning(_("hard link failed, symbolic link used"));
614 }
615 #endif
616 if (result != 0) {
617 const char *e = strerror(errno);
618
619 (void) fprintf(stderr,
620 _("%s: Can't link from %s to %s: %s\n"),
621 progname, fromname, toname, e);
622 (void) exit(EXIT_FAILURE);
623 }
624 }
625 ifree(fromname);
626 ifree(toname);
627 }
628
629 #ifndef INT_MAX
630 #define INT_MAX ((int) (((unsigned)~0)>>1))
631 #endif /* !defined INT_MAX */
632
633 #ifndef INT_MIN
634 #define INT_MIN ((int) ~(((unsigned)~0)>>1))
635 #endif /* !defined INT_MIN */
636
637 /*
638 ** The tz file format currently allows at most 32-bit quantities.
639 ** This restriction should be removed before signed 32-bit values
640 ** wrap around in 2038, but unfortunately this will require a
641 ** change to the tz file format.
642 */
643
644 #define MAX_BITS_IN_FILE 32
645 #define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE)
646
647 static void
648 setboundaries P((void))
649 {
650 if (TYPE_SIGNED(time_t)) {
651 min_time = ~ (time_t) 0;
652 min_time <<= TIME_T_BITS_IN_FILE - 1;
653 max_time = ~ (time_t) 0 - min_time;
654 if (sflag)
655 min_time = 0;
656 } else {
657 min_time = 0;
658 max_time = 2 - sflag;
659 max_time <<= TIME_T_BITS_IN_FILE - 1;
660 --max_time;
661 }
662 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
663 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
664 min_year_representable = min_year;
665 max_year_representable = max_year;
666 }
667
668 static int
669 itsdir(name)
670 const char * const name;
671 {
672 register char * myname;
673 register int accres;
674
675 myname = ecpyalloc(name);
676 myname = ecatalloc(myname, "/.");
677 accres = access(myname, F_OK);
678 ifree(myname);
679 return accres == 0;
680 }
681
682 /*
683 ** Associate sets of rules with zones.
684 */
685
686 /*
687 ** Sort by rule name.
688 */
689
690 static int
691 rcomp(cp1, cp2)
692 const void * cp1;
693 const void * cp2;
694 {
695 return strcmp(((const struct rule *) cp1)->r_name,
696 ((const struct rule *) cp2)->r_name);
697 }
698
699 static void
700 associate P((void))
701 {
702 register struct zone * zp;
703 register struct rule * rp;
704 register int base, out;
705 register int i, j;
706
707 if (nrules != 0) {
708 (void) qsort((void *) rules, (size_t) nrules,
709 (size_t) sizeof *rules, rcomp);
710 for (i = 0; i < nrules - 1; ++i) {
711 if (strcmp(rules[i].r_name,
712 rules[i + 1].r_name) != 0)
713 continue;
714 if (strcmp(rules[i].r_filename,
715 rules[i + 1].r_filename) == 0)
716 continue;
717 eat(rules[i].r_filename, rules[i].r_linenum);
718 warning(_("same rule name in multiple files"));
719 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
720 warning(_("same rule name in multiple files"));
721 for (j = i + 2; j < nrules; ++j) {
722 if (strcmp(rules[i].r_name,
723 rules[j].r_name) != 0)
724 break;
725 if (strcmp(rules[i].r_filename,
726 rules[j].r_filename) == 0)
727 continue;
728 if (strcmp(rules[i + 1].r_filename,
729 rules[j].r_filename) == 0)
730 continue;
731 break;
732 }
733 i = j - 1;
734 }
735 }
736 for (i = 0; i < nzones; ++i) {
737 zp = &zones[i];
738 zp->z_rules = NULL;
739 zp->z_nrules = 0;
740 }
741 for (base = 0; base < nrules; base = out) {
742 rp = &rules[base];
743 for (out = base + 1; out < nrules; ++out)
744 if (strcmp(rp->r_name, rules[out].r_name) != 0)
745 break;
746 for (i = 0; i < nzones; ++i) {
747 zp = &zones[i];
748 if (strcmp(zp->z_rule, rp->r_name) != 0)
749 continue;
750 zp->z_rules = rp;
751 zp->z_nrules = out - base;
752 }
753 }
754 for (i = 0; i < nzones; ++i) {
755 zp = &zones[i];
756 if (zp->z_nrules == 0) {
757 /*
758 ** Maybe we have a local standard time offset.
759 */
760 eat(zp->z_filename, zp->z_linenum);
761 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
762 TRUE);
763 /*
764 ** Note, though, that if there's no rule,
765 ** a '%s' in the format is a bad thing.
766 */
767 if (strchr(zp->z_format, '%') != 0)
768 error(_("%s in ruleless zone"));
769 }
770 }
771 if (errors)
772 (void) exit(EXIT_FAILURE);
773 }
774
775 static void
776 infile(name)
777 const char * name;
778 {
779 register FILE * fp;
780 register char ** fields;
781 register char * cp;
782 register const struct lookup * lp;
783 register int nfields;
784 register int wantcont;
785 register int num;
786 char buf[BUFSIZ];
787
788 if (strcmp(name, "-") == 0) {
789 name = _("standard input");
790 fp = stdin;
791 } else if ((fp = fopen(name, "r")) == NULL) {
792 const char *e = strerror(errno);
793
794 (void) fprintf(stderr, _("%s: Can't open %s: %s\n"),
795 progname, name, e);
796 (void) exit(EXIT_FAILURE);
797 }
798 wantcont = FALSE;
799 for (num = 1; ; ++num) {
800 eat(name, num);
801 if (fgets(buf, (int) sizeof buf, fp) != buf)
802 break;
803 cp = strchr(buf, '\n');
804 if (cp == NULL) {
805 error(_("line too long"));
806 (void) exit(EXIT_FAILURE);
807 }
808 *cp = '\0';
809 fields = getfields(buf);
810 nfields = 0;
811 while (fields[nfields] != NULL) {
812 static char nada;
813
814 if (strcmp(fields[nfields], "-") == 0)
815 fields[nfields] = &nada;
816 ++nfields;
817 }
818 if (nfields == 0) {
819 /* nothing to do */
820 } else if (wantcont) {
821 wantcont = inzcont(fields, nfields);
822 } else {
823 lp = byword(fields[0], line_codes);
824 if (lp == NULL)
825 error(_("input line of unknown type"));
826 else switch ((int) (lp->l_value)) {
827 case LC_RULE:
828 inrule(fields, nfields);
829 wantcont = FALSE;
830 break;
831 case LC_ZONE:
832 wantcont = inzone(fields, nfields);
833 break;
834 case LC_LINK:
835 inlink(fields, nfields);
836 wantcont = FALSE;
837 break;
838 case LC_LEAP:
839 if (name != leapsec)
840 (void) fprintf(stderr,
841 _("%s: Leap line in non leap seconds file %s\n"),
842 progname, name);
843 else inleap(fields, nfields);
844 wantcont = FALSE;
845 break;
846 default: /* "cannot happen" */
847 (void) fprintf(stderr,
848 _("%s: panic: Invalid l_value %d\n"),
849 progname, lp->l_value);
850 (void) exit(EXIT_FAILURE);
851 }
852 }
853 ifree((char *) fields);
854 }
855 if (ferror(fp)) {
856 (void) fprintf(stderr, _("%s: Error reading %s\n"),
857 progname, filename);
858 (void) exit(EXIT_FAILURE);
859 }
860 if (fp != stdin && fclose(fp)) {
861 const char *e = strerror(errno);
862
863 (void) fprintf(stderr, _("%s: Error closing %s: %s\n"),
864 progname, filename, e);
865 (void) exit(EXIT_FAILURE);
866 }
867 if (wantcont)
868 error(_("expected continuation line not found"));
869 }
870
871 /*
872 ** Convert a string of one of the forms
873 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
874 ** into a number of seconds.
875 ** A null string maps to zero.
876 ** Call error with errstring and return zero on errors.
877 */
878
879 static long
880 gethms(string, errstring, signable)
881 const char * string;
882 const char * const errstring;
883 const int signable;
884 {
885 int hh, mm, ss, sign;
886
887 if (string == NULL || *string == '\0')
888 return 0;
889 if (!signable)
890 sign = 1;
891 else if (*string == '-') {
892 sign = -1;
893 ++string;
894 } else sign = 1;
895 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
896 mm = ss = 0;
897 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
898 ss = 0;
899 else if (sscanf(string, scheck(string, "%d:%d:%d"),
900 &hh, &mm, &ss) != 3) {
901 error(errstring);
902 return 0;
903 }
904 if ((hh < 0 || hh >= HOURSPERDAY ||
905 mm < 0 || mm >= MINSPERHOUR ||
906 ss < 0 || ss > SECSPERMIN) &&
907 !(hh == HOURSPERDAY && mm == 0 && ss == 0)) {
908 error(errstring);
909 return 0;
910 }
911 return eitol(sign) *
912 (eitol(hh * MINSPERHOUR + mm) *
913 eitol(SECSPERMIN) + eitol(ss));
914 }
915
916 static void
917 inrule(fields, nfields)
918 register char ** const fields;
919 const int nfields;
920 {
921 static struct rule r;
922
923 if (nfields != RULE_FIELDS) {
924 error(_("wrong number of fields on Rule line"));
925 return;
926 }
927 if (*fields[RF_NAME] == '\0') {
928 error(_("nameless rule"));
929 return;
930 }
931 r.r_filename = filename;
932 r.r_linenum = linenum;
933 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
934 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
935 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
936 r.r_name = ecpyalloc(fields[RF_NAME]);
937 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
938 rules = (struct rule *) (void *) erealloc((char *) rules,
939 (int) ((nrules + 1) * sizeof *rules));
940 rules[nrules++] = r;
941 }
942
943 static int
944 inzone(fields, nfields)
945 register char ** const fields;
946 const int nfields;
947 {
948 register int i;
949 static char * buf;
950
951 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
952 error(_("wrong number of fields on Zone line"));
953 return FALSE;
954 }
955 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
956 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
957 (void) sprintf(buf,
958 _("\"Zone %s\" line and -l option are mutually exclusive"),
959 TZDEFAULT);
960 error(buf);
961 return FALSE;
962 }
963 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
964 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
965 (void) sprintf(buf,
966 _("\"Zone %s\" line and -p option are mutually exclusive"),
967 TZDEFRULES);
968 error(buf);
969 return FALSE;
970 }
971 for (i = 0; i < nzones; ++i)
972 if (zones[i].z_name != NULL &&
973 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
974 buf = erealloc(buf, (int) (132 +
975 strlen(fields[ZF_NAME]) +
976 strlen(zones[i].z_filename)));
977 (void) sprintf(buf,
978 _("duplicate zone name %s (file \"%s\", line %d)"),
979 fields[ZF_NAME],
980 zones[i].z_filename,
981 zones[i].z_linenum);
982 error(buf);
983 return FALSE;
984 }
985 return inzsub(fields, nfields, FALSE);
986 }
987
988 static int
989 inzcont(fields, nfields)
990 register char ** const fields;
991 const int nfields;
992 {
993 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
994 error(_("wrong number of fields on Zone continuation line"));
995 return FALSE;
996 }
997 return inzsub(fields, nfields, TRUE);
998 }
999
1000 static int
1001 inzsub(fields, nfields, iscont)
1002 register char ** const fields;
1003 const int nfields;
1004 const int iscont;
1005 {
1006 register char * cp;
1007 static struct zone z;
1008 register int i_gmtoff, i_rule, i_format;
1009 register int i_untilyear, i_untilmonth;
1010 register int i_untilday, i_untiltime;
1011 register int hasuntil;
1012
1013 if (iscont) {
1014 i_gmtoff = ZFC_GMTOFF;
1015 i_rule = ZFC_RULE;
1016 i_format = ZFC_FORMAT;
1017 i_untilyear = ZFC_TILYEAR;
1018 i_untilmonth = ZFC_TILMONTH;
1019 i_untilday = ZFC_TILDAY;
1020 i_untiltime = ZFC_TILTIME;
1021 z.z_name = NULL;
1022 } else {
1023 i_gmtoff = ZF_GMTOFF;
1024 i_rule = ZF_RULE;
1025 i_format = ZF_FORMAT;
1026 i_untilyear = ZF_TILYEAR;
1027 i_untilmonth = ZF_TILMONTH;
1028 i_untilday = ZF_TILDAY;
1029 i_untiltime = ZF_TILTIME;
1030 z.z_name = ecpyalloc(fields[ZF_NAME]);
1031 }
1032 z.z_filename = filename;
1033 z.z_linenum = linenum;
1034 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE);
1035 if ((cp = strchr(fields[i_format], '%')) != 0) {
1036 if (*++cp != 's' || strchr(cp, '%') != 0) {
1037 error(_("invalid abbreviation format"));
1038 return FALSE;
1039 }
1040 }
1041 z.z_rule = ecpyalloc(fields[i_rule]);
1042 z.z_format = ecpyalloc(fields[i_format]);
1043 hasuntil = nfields > i_untilyear;
1044 if (hasuntil) {
1045 z.z_untilrule.r_filename = filename;
1046 z.z_untilrule.r_linenum = linenum;
1047 rulesub(&z.z_untilrule,
1048 fields[i_untilyear],
1049 "only",
1050 "",
1051 (nfields > i_untilmonth) ?
1052 fields[i_untilmonth] : "Jan",
1053 (nfields > i_untilday) ? fields[i_untilday] : "1",
1054 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1055 z.z_untiltime = rpytime(&z.z_untilrule,
1056 z.z_untilrule.r_loyear);
1057 if (iscont && nzones > 0 &&
1058 z.z_untiltime > min_time &&
1059 z.z_untiltime < max_time &&
1060 zones[nzones - 1].z_untiltime > min_time &&
1061 zones[nzones - 1].z_untiltime < max_time &&
1062 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1063 error(_("Zone continuation line end time is not after end time of previous line"));
1064 return FALSE;
1065 }
1066 }
1067 zones = (struct zone *) (void *) erealloc((char *) zones,
1068 (int) ((nzones + 1) * sizeof *zones));
1069 zones[nzones++] = z;
1070 /*
1071 ** If there was an UNTIL field on this line,
1072 ** there's more information about the zone on the next line.
1073 */
1074 return hasuntil;
1075 }
1076
1077 static void
1078 inleap(fields, nfields)
1079 register char ** const fields;
1080 const int nfields;
1081 {
1082 register const char * cp;
1083 register const struct lookup * lp;
1084 register int i, j;
1085 int year, month, day;
1086 long dayoff, tod;
1087 time_t t;
1088
1089 if (nfields != LEAP_FIELDS) {
1090 error(_("wrong number of fields on Leap line"));
1091 return;
1092 }
1093 dayoff = 0;
1094 cp = fields[LP_YEAR];
1095 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1096 /*
1097 * Leapin' Lizards!
1098 */
1099 error(_("invalid leaping year"));
1100 return;
1101 }
1102 j = EPOCH_YEAR;
1103 while (j != year) {
1104 if (year > j) {
1105 i = len_years[isleap(j)];
1106 ++j;
1107 } else {
1108 --j;
1109 i = -len_years[isleap(j)];
1110 }
1111 dayoff = oadd(dayoff, eitol(i));
1112 }
1113 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1114 error(_("invalid month name"));
1115 return;
1116 }
1117 month = lp->l_value;
1118 j = TM_JANUARY;
1119 while (j != month) {
1120 i = len_months[isleap(year)][j];
1121 dayoff = oadd(dayoff, eitol(i));
1122 ++j;
1123 }
1124 cp = fields[LP_DAY];
1125 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1126 day <= 0 || day > len_months[isleap(year)][month]) {
1127 error(_("invalid day of month"));
1128 return;
1129 }
1130 dayoff = oadd(dayoff, eitol(day - 1));
1131 if (dayoff < 0 && !TYPE_SIGNED(time_t)) {
1132 error(_("time before zero"));
1133 return;
1134 }
1135 t = (time_t) dayoff * SECSPERDAY;
1136 /*
1137 ** Cheap overflow check.
1138 */
1139 if (t / SECSPERDAY != dayoff) {
1140 error(_("time overflow"));
1141 return;
1142 }
1143 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1144 cp = fields[LP_CORR];
1145 {
1146 register int positive;
1147 int count;
1148
1149 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1150 positive = FALSE;
1151 count = 1;
1152 } else if (strcmp(cp, "--") == 0) {
1153 positive = FALSE;
1154 count = 2;
1155 } else if (strcmp(cp, "+") == 0) {
1156 positive = TRUE;
1157 count = 1;
1158 } else if (strcmp(cp, "++") == 0) {
1159 positive = TRUE;
1160 count = 2;
1161 } else {
1162 error(_("illegal CORRECTION field on Leap line"));
1163 return;
1164 }
1165 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1166 error(_("illegal Rolling/Stationary field on Leap line"));
1167 return;
1168 }
1169 leapadd(tadd(t, tod), positive, lp->l_value, count);
1170 }
1171 }
1172
1173 static void
1174 inlink(fields, nfields)
1175 register char ** const fields;
1176 const int nfields;
1177 {
1178 struct link l;
1179
1180 if (nfields != LINK_FIELDS) {
1181 error(_("wrong number of fields on Link line"));
1182 return;
1183 }
1184 if (*fields[LF_FROM] == '\0') {
1185 error(_("blank FROM field on Link line"));
1186 return;
1187 }
1188 if (*fields[LF_TO] == '\0') {
1189 error(_("blank TO field on Link line"));
1190 return;
1191 }
1192 l.l_filename = filename;
1193 l.l_linenum = linenum;
1194 l.l_from = ecpyalloc(fields[LF_FROM]);
1195 l.l_to = ecpyalloc(fields[LF_TO]);
1196 links = (struct link *) (void *) erealloc((char *) links,
1197 (int) ((nlinks + 1) * sizeof *links));
1198 links[nlinks++] = l;
1199 }
1200
1201 static void
1202 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1203 register struct rule * const rp;
1204 const char * const loyearp;
1205 const char * const hiyearp;
1206 const char * const typep;
1207 const char * const monthp;
1208 const char * const dayp;
1209 const char * const timep;
1210 {
1211 register const struct lookup * lp;
1212 register const char * cp;
1213 register char * dp;
1214 register char * ep;
1215
1216 if ((lp = byword(monthp, mon_names)) == NULL) {
1217 error(_("invalid month name"));
1218 return;
1219 }
1220 rp->r_month = lp->l_value;
1221 rp->r_todisstd = FALSE;
1222 rp->r_todisgmt = FALSE;
1223 dp = ecpyalloc(timep);
1224 if (*dp != '\0') {
1225 ep = dp + strlen(dp) - 1;
1226 switch (lowerit(*ep)) {
1227 case 's': /* Standard */
1228 rp->r_todisstd = TRUE;
1229 rp->r_todisgmt = FALSE;
1230 *ep = '\0';
1231 break;
1232 case 'w': /* Wall */
1233 rp->r_todisstd = FALSE;
1234 rp->r_todisgmt = FALSE;
1235 *ep = '\0';
1236 break;
1237 case 'g': /* Greenwich */
1238 case 'u': /* Universal */
1239 case 'z': /* Zulu */
1240 rp->r_todisstd = TRUE;
1241 rp->r_todisgmt = TRUE;
1242 *ep = '\0';
1243 break;
1244 }
1245 }
1246 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1247 ifree(dp);
1248 /*
1249 ** Year work.
1250 */
1251 cp = loyearp;
1252 lp = byword(cp, begin_years);
1253 if (lp != NULL) switch ((int) lp->l_value) {
1254 case YR_MINIMUM:
1255 rp->r_loyear = INT_MIN;
1256 break;
1257 case YR_MAXIMUM:
1258 rp->r_loyear = INT_MAX;
1259 break;
1260 default: /* "cannot happen" */
1261 (void) fprintf(stderr,
1262 _("%s: panic: Invalid l_value %d\n"),
1263 progname, lp->l_value);
1264 (void) exit(EXIT_FAILURE);
1265 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1266 error(_("invalid starting year"));
1267 return;
1268 } else if (noise) {
1269 if (rp->r_loyear < min_year_representable)
1270 warning(_("starting year too low to be represented"));
1271 else if (rp->r_loyear > max_year_representable)
1272 warning(_("starting year too high to be represented"));
1273 }
1274 cp = hiyearp;
1275 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1276 case YR_MINIMUM:
1277 rp->r_hiyear = INT_MIN;
1278 break;
1279 case YR_MAXIMUM:
1280 rp->r_hiyear = INT_MAX;
1281 break;
1282 case YR_ONLY:
1283 rp->r_hiyear = rp->r_loyear;
1284 break;
1285 default: /* "cannot happen" */
1286 (void) fprintf(stderr,
1287 _("%s: panic: Invalid l_value %d\n"),
1288 progname, lp->l_value);
1289 (void) exit(EXIT_FAILURE);
1290 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1291 error(_("invalid ending year"));
1292 return;
1293 } else if (noise) {
1294 if (rp->r_loyear < min_year_representable)
1295 warning(_("starting year too low to be represented"));
1296 else if (rp->r_loyear > max_year_representable)
1297 warning(_("starting year too high to be represented"));
1298 }
1299 if (rp->r_loyear > rp->r_hiyear) {
1300 error(_("starting year greater than ending year"));
1301 return;
1302 }
1303 if (*typep == '\0')
1304 rp->r_yrtype = NULL;
1305 else {
1306 if (rp->r_loyear == rp->r_hiyear) {
1307 error(_("typed single year"));
1308 return;
1309 }
1310 rp->r_yrtype = ecpyalloc(typep);
1311 }
1312 if (rp->r_loyear < min_year && rp->r_loyear > 0)
1313 min_year = rp->r_loyear;
1314 /*
1315 ** Day work.
1316 ** Accept things such as:
1317 ** 1
1318 ** last-Sunday
1319 ** Sun<=20
1320 ** Sun>=7
1321 */
1322 dp = ecpyalloc(dayp);
1323 if ((lp = byword(dp, lasts)) != NULL) {
1324 rp->r_dycode = DC_DOWLEQ;
1325 rp->r_wday = lp->l_value;
1326 rp->r_dayofmonth = len_months[1][rp->r_month];
1327 } else {
1328 if ((ep = strchr(dp, '<')) != 0)
1329 rp->r_dycode = DC_DOWLEQ;
1330 else if ((ep = strchr(dp, '>')) != 0)
1331 rp->r_dycode = DC_DOWGEQ;
1332 else {
1333 ep = dp;
1334 rp->r_dycode = DC_DOM;
1335 }
1336 if (rp->r_dycode != DC_DOM) {
1337 *ep++ = 0;
1338 if (*ep++ != '=') {
1339 error(_("invalid day of month"));
1340 ifree(dp);
1341 return;
1342 }
1343 if ((lp = byword(dp, wday_names)) == NULL) {
1344 error(_("invalid weekday name"));
1345 ifree(dp);
1346 return;
1347 }
1348 rp->r_wday = lp->l_value;
1349 }
1350 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1351 rp->r_dayofmonth <= 0 ||
1352 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1353 error(_("invalid day of month"));
1354 ifree(dp);
1355 return;
1356 }
1357 }
1358 ifree(dp);
1359 }
1360
1361 static void
1362 convert(val, buf)
1363 const long val;
1364 char * const buf;
1365 {
1366 register int i;
1367 register long shift;
1368
1369 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1370 buf[i] = val >> shift;
1371 }
1372
1373 static void
1374 puttzcode(val, fp)
1375 const long val;
1376 FILE * const fp;
1377 {
1378 char buf[4];
1379
1380 convert(val, buf);
1381 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1382 }
1383
1384 static int
1385 atcomp(avp, bvp)
1386 void * avp;
1387 void * bvp;
1388 {
1389 if (((struct attype *) avp)->at < ((struct attype *) bvp)->at)
1390 return -1;
1391 else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at)
1392 return 1;
1393 else return 0;
1394 }
1395
1396 static void
1397 writezone(name)
1398 const char * const name;
1399 {
1400 register FILE * fp;
1401 register int i, j;
1402 static char * fullname;
1403 static struct tzhead tzh;
1404 time_t ats[TZ_MAX_TIMES];
1405 unsigned char types[TZ_MAX_TIMES];
1406
1407 /*
1408 ** Sort.
1409 */
1410 if (timecnt > 1)
1411 (void) qsort((void *) attypes, (size_t) timecnt,
1412 (size_t) sizeof *attypes, atcomp);
1413 /*
1414 ** Optimize.
1415 */
1416 {
1417 int fromi;
1418 int toi;
1419
1420 toi = 0;
1421 fromi = 0;
1422 while (fromi < timecnt && attypes[fromi].at < min_time)
1423 ++fromi;
1424 if (isdsts[0] == 0)
1425 while (fromi < timecnt && attypes[fromi].type == 0)
1426 ++fromi; /* handled by default rule */
1427 for ( ; fromi < timecnt; ++fromi) {
1428 if (toi != 0
1429 && ((attypes[fromi].at
1430 + gmtoffs[attypes[toi - 1].type])
1431 <= (attypes[toi - 1].at
1432 + gmtoffs[toi == 1 ? 0
1433 : attypes[toi - 2].type]))) {
1434 attypes[toi - 1].type = attypes[fromi].type;
1435 continue;
1436 }
1437 if (toi == 0 ||
1438 attypes[toi - 1].type != attypes[fromi].type)
1439 attypes[toi++] = attypes[fromi];
1440 }
1441 timecnt = toi;
1442 }
1443 /*
1444 ** Transfer.
1445 */
1446 for (i = 0; i < timecnt; ++i) {
1447 ats[i] = attypes[i].at;
1448 types[i] = attypes[i].type;
1449 }
1450 fullname = erealloc(fullname,
1451 (int) (strlen(directory) + 1 + strlen(name) + 1));
1452 (void) sprintf(fullname, "%s/%s", directory, name);
1453 /*
1454 ** Remove old file, if any, to snap links.
1455 */
1456 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT) {
1457 const char *e = strerror(errno);
1458
1459 (void) fprintf(stderr, _("%s: Can't remove %s: %s\n"),
1460 progname, fullname, e);
1461 (void) exit(EXIT_FAILURE);
1462 }
1463 if ((fp = fopen(fullname, "wb")) == NULL) {
1464 if (mkdirs(fullname) != 0)
1465 (void) exit(EXIT_FAILURE);
1466 if ((fp = fopen(fullname, "wb")) == NULL) {
1467 const char *e = strerror(errno);
1468
1469 (void) fprintf(stderr, _("%s: Can't create %s: %s\n"),
1470 progname, fullname, e);
1471 (void) exit(EXIT_FAILURE);
1472 }
1473 }
1474 convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
1475 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1476 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1477 convert(eitol(timecnt), tzh.tzh_timecnt);
1478 convert(eitol(typecnt), tzh.tzh_typecnt);
1479 convert(eitol(charcnt), tzh.tzh_charcnt);
1480 (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
1481 #define DO(field) (void) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp)
1482 DO(tzh_magic);
1483 DO(tzh_reserved);
1484 DO(tzh_ttisgmtcnt);
1485 DO(tzh_ttisstdcnt);
1486 DO(tzh_leapcnt);
1487 DO(tzh_timecnt);
1488 DO(tzh_typecnt);
1489 DO(tzh_charcnt);
1490 #undef DO
1491 for (i = 0; i < timecnt; ++i) {
1492 j = leapcnt;
1493 while (--j >= 0)
1494 if (ats[i] >= trans[j]) {
1495 ats[i] = tadd(ats[i], corr[j]);
1496 break;
1497 }
1498 puttzcode((long) ats[i], fp);
1499 }
1500 if (timecnt > 0)
1501 (void) fwrite((void *) types, (size_t) sizeof types[0],
1502 (size_t) timecnt, fp);
1503 for (i = 0; i < typecnt; ++i) {
1504 puttzcode((long) gmtoffs[i], fp);
1505 (void) putc(isdsts[i], fp);
1506 (void) putc(abbrinds[i], fp);
1507 }
1508 if (charcnt != 0)
1509 (void) fwrite((void *) chars, (size_t) sizeof chars[0],
1510 (size_t) charcnt, fp);
1511 for (i = 0; i < leapcnt; ++i) {
1512 if (roll[i]) {
1513 if (timecnt == 0 || trans[i] < ats[0]) {
1514 j = 0;
1515 while (isdsts[j])
1516 if (++j >= typecnt) {
1517 j = 0;
1518 break;
1519 }
1520 } else {
1521 j = 1;
1522 while (j < timecnt && trans[i] >= ats[j])
1523 ++j;
1524 j = types[j - 1];
1525 }
1526 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1527 } else puttzcode((long) trans[i], fp);
1528 puttzcode((long) corr[i], fp);
1529 }
1530 for (i = 0; i < typecnt; ++i)
1531 (void) putc(ttisstds[i], fp);
1532 for (i = 0; i < typecnt; ++i)
1533 (void) putc(ttisgmts[i], fp);
1534 if (ferror(fp) || fclose(fp)) {
1535 (void) fprintf(stderr, _("%s: Error writing %s\n"),
1536 progname, fullname);
1537 (void) exit(EXIT_FAILURE);
1538 }
1539 }
1540
1541 static void
1542 doabbr(abbr, format, letters, isdst)
1543 char * const abbr;
1544 const char * const format;
1545 const char * const letters;
1546 const int isdst;
1547 {
1548 if (strchr(format, '/') == NULL) {
1549 if (letters == NULL)
1550 (void) strcpy(abbr, format);
1551 else (void) sprintf(abbr, format, letters);
1552 } else if (isdst)
1553 (void) strcpy(abbr, strchr(format, '/') + 1);
1554 else {
1555 (void) strcpy(abbr, format);
1556 *strchr(abbr, '/') = '\0';
1557 }
1558 }
1559
1560 static void
1561 outzone(zpfirst, zonecount)
1562 const struct zone * const zpfirst;
1563 const int zonecount;
1564 {
1565 register const struct zone * zp;
1566 register struct rule * rp;
1567 register int i, j;
1568 register int usestart, useuntil;
1569 register time_t starttime, untiltime;
1570 register long gmtoff;
1571 register long stdoff;
1572 register int year;
1573 register long startoff;
1574 register int startttisstd;
1575 register int startttisgmt;
1576 register int type;
1577 char startbuf[BUFSIZ];
1578
1579 INITIALIZE(untiltime);
1580 INITIALIZE(starttime);
1581 /*
1582 ** Now. . .finally. . .generate some useful data!
1583 */
1584 timecnt = 0;
1585 typecnt = 0;
1586 charcnt = 0;
1587 /*
1588 ** A guess that may well be corrected later.
1589 */
1590 stdoff = 0;
1591 /*
1592 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1593 ** for noting the need to unconditionally initialize startttisstd.
1594 */
1595 startttisstd = FALSE;
1596 startttisgmt = FALSE;
1597 for (i = 0; i < zonecount; ++i) {
1598 zp = &zpfirst[i];
1599 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1600 useuntil = i < (zonecount - 1);
1601 if (useuntil && zp->z_untiltime <= min_time)
1602 continue;
1603 gmtoff = zp->z_gmtoff;
1604 eat(zp->z_filename, zp->z_linenum);
1605 *startbuf = '\0';
1606 startoff = zp->z_gmtoff;
1607 if (zp->z_nrules == 0) {
1608 stdoff = zp->z_stdoff;
1609 doabbr(startbuf, zp->z_format,
1610 (char *) NULL, stdoff != 0);
1611 type = addtype(oadd(zp->z_gmtoff, stdoff),
1612 startbuf, stdoff != 0, startttisstd,
1613 startttisgmt);
1614 if (usestart) {
1615 addtt(starttime, type);
1616 usestart = FALSE;
1617 }
1618 else if (stdoff != 0)
1619 addtt(min_time, type);
1620 } else for (year = min_year; year <= max_year; ++year) {
1621 if (useuntil && year > zp->z_untilrule.r_hiyear)
1622 break;
1623 /*
1624 ** Mark which rules to do in the current year.
1625 ** For those to do, calculate rpytime(rp, year);
1626 */
1627 for (j = 0; j < zp->z_nrules; ++j) {
1628 rp = &zp->z_rules[j];
1629 eats(zp->z_filename, zp->z_linenum,
1630 rp->r_filename, rp->r_linenum);
1631 rp->r_todo = year >= rp->r_loyear &&
1632 year <= rp->r_hiyear &&
1633 yearistype(year, rp->r_yrtype);
1634 if (rp->r_todo)
1635 rp->r_temp = rpytime(rp, year);
1636 }
1637 for ( ; ; ) {
1638 register int k;
1639 register time_t jtime, ktime;
1640 register long offset;
1641 char buf[BUFSIZ];
1642
1643 INITIALIZE(ktime);
1644 if (useuntil) {
1645 /*
1646 ** Turn untiltime into UTC
1647 ** assuming the current gmtoff and
1648 ** stdoff values.
1649 */
1650 untiltime = zp->z_untiltime;
1651 if (!zp->z_untilrule.r_todisgmt)
1652 untiltime = tadd(untiltime,
1653 -gmtoff);
1654 if (!zp->z_untilrule.r_todisstd)
1655 untiltime = tadd(untiltime,
1656 -stdoff);
1657 }
1658 /*
1659 ** Find the rule (of those to do, if any)
1660 ** that takes effect earliest in the year.
1661 */
1662 k = -1;
1663 for (j = 0; j < zp->z_nrules; ++j) {
1664 rp = &zp->z_rules[j];
1665 if (!rp->r_todo)
1666 continue;
1667 eats(zp->z_filename, zp->z_linenum,
1668 rp->r_filename, rp->r_linenum);
1669 offset = rp->r_todisgmt ? 0 : gmtoff;
1670 if (!rp->r_todisstd)
1671 offset = oadd(offset, stdoff);
1672 jtime = rp->r_temp;
1673 if (jtime == min_time ||
1674 jtime == max_time)
1675 continue;
1676 jtime = tadd(jtime, -offset);
1677 if (k < 0 || jtime < ktime) {
1678 k = j;
1679 ktime = jtime;
1680 }
1681 }
1682 if (k < 0)
1683 break; /* go on to next year */
1684 rp = &zp->z_rules[k];
1685 rp->r_todo = FALSE;
1686 if (useuntil && ktime >= untiltime)
1687 break;
1688 stdoff = rp->r_stdoff;
1689 if (usestart && ktime == starttime)
1690 usestart = FALSE;
1691 if (usestart) {
1692 if (ktime < starttime) {
1693 startoff = oadd(zp->z_gmtoff,
1694 stdoff);
1695 doabbr(startbuf, zp->z_format,
1696 rp->r_abbrvar,
1697 rp->r_stdoff != 0);
1698 continue;
1699 }
1700 if (*startbuf == '\0' &&
1701 startoff == oadd(zp->z_gmtoff,
1702 stdoff)) {
1703 doabbr(startbuf, zp->z_format,
1704 rp->r_abbrvar,
1705 rp->r_stdoff != 0);
1706 }
1707 }
1708 eats(zp->z_filename, zp->z_linenum,
1709 rp->r_filename, rp->r_linenum);
1710 doabbr(buf, zp->z_format, rp->r_abbrvar,
1711 rp->r_stdoff != 0);
1712 offset = oadd(zp->z_gmtoff, rp->r_stdoff);
1713 type = addtype(offset, buf, rp->r_stdoff != 0,
1714 rp->r_todisstd, rp->r_todisgmt);
1715 addtt(ktime, type);
1716 }
1717 }
1718 if (usestart) {
1719 if (*startbuf == '\0' &&
1720 zp->z_format != NULL &&
1721 strchr(zp->z_format, '%') == NULL &&
1722 strchr(zp->z_format, '/') == NULL)
1723 (void) strcpy(startbuf, zp->z_format);
1724 eat(zp->z_filename, zp->z_linenum);
1725 if (*startbuf == '\0')
1726 error(_("can't determine time zone abbreviation to use just after until time"));
1727 else addtt(starttime,
1728 addtype(startoff, startbuf,
1729 startoff != zp->z_gmtoff,
1730 startttisstd,
1731 startttisgmt));
1732 }
1733 /*
1734 ** Now we may get to set starttime for the next zone line.
1735 */
1736 if (useuntil) {
1737 startttisstd = zp->z_untilrule.r_todisstd;
1738 startttisgmt = zp->z_untilrule.r_todisgmt;
1739 starttime = zp->z_untiltime;
1740 if (!startttisstd)
1741 starttime = tadd(starttime, -stdoff);
1742 if (!startttisgmt)
1743 starttime = tadd(starttime, -gmtoff);
1744 }
1745 }
1746 writezone(zpfirst->z_name);
1747 }
1748
1749 static void
1750 addtt(starttime, type)
1751 const time_t starttime;
1752 int type;
1753 {
1754 if (starttime <= min_time ||
1755 (timecnt == 1 && attypes[0].at < min_time)) {
1756 gmtoffs[0] = gmtoffs[type];
1757 isdsts[0] = isdsts[type];
1758 ttisstds[0] = ttisstds[type];
1759 ttisgmts[0] = ttisgmts[type];
1760 if (abbrinds[type] != 0)
1761 (void) strcpy(chars, &chars[abbrinds[type]]);
1762 abbrinds[0] = 0;
1763 charcnt = strlen(chars) + 1;
1764 typecnt = 1;
1765 timecnt = 0;
1766 type = 0;
1767 }
1768 if (timecnt >= TZ_MAX_TIMES) {
1769 error(_("too many transitions?!"));
1770 (void) exit(EXIT_FAILURE);
1771 }
1772 attypes[timecnt].at = starttime;
1773 attypes[timecnt].type = type;
1774 ++timecnt;
1775 }
1776
1777 static int
1778 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
1779 const long gmtoff;
1780 const char * const abbr;
1781 const int isdst;
1782 const int ttisstd;
1783 const int ttisgmt;
1784 {
1785 register int i, j;
1786
1787 if (isdst != TRUE && isdst != FALSE) {
1788 error(_("internal error - addtype called with bad isdst"));
1789 (void) exit(EXIT_FAILURE);
1790 }
1791 if (ttisstd != TRUE && ttisstd != FALSE) {
1792 error(_("internal error - addtype called with bad ttisstd"));
1793 (void) exit(EXIT_FAILURE);
1794 }
1795 if (ttisgmt != TRUE && ttisgmt != FALSE) {
1796 error(_("internal error - addtype called with bad ttisgmt"));
1797 (void) exit(EXIT_FAILURE);
1798 }
1799 /*
1800 ** See if there's already an entry for this zone type.
1801 ** If so, just return its index.
1802 */
1803 for (i = 0; i < typecnt; ++i) {
1804 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1805 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1806 ttisstd == ttisstds[i] &&
1807 ttisgmt == ttisgmts[i])
1808 return i;
1809 }
1810 /*
1811 ** There isn't one; add a new one, unless there are already too
1812 ** many.
1813 */
1814 if (typecnt >= TZ_MAX_TYPES) {
1815 error(_("too many local time types"));
1816 (void) exit(EXIT_FAILURE);
1817 }
1818 gmtoffs[i] = gmtoff;
1819 isdsts[i] = isdst;
1820 ttisstds[i] = ttisstd;
1821 ttisgmts[i] = ttisgmt;
1822
1823 for (j = 0; j < charcnt; ++j)
1824 if (strcmp(&chars[j], abbr) == 0)
1825 break;
1826 if (j == charcnt)
1827 newabbr(abbr);
1828 abbrinds[i] = j;
1829 ++typecnt;
1830 return i;
1831 }
1832
1833 static void
1834 leapadd(t, positive, rolling, count)
1835 const time_t t;
1836 const int positive;
1837 const int rolling;
1838 int count;
1839 {
1840 register int i, j;
1841
1842 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1843 error(_("too many leap seconds"));
1844 (void) exit(EXIT_FAILURE);
1845 }
1846 for (i = 0; i < leapcnt; ++i)
1847 if (t <= trans[i]) {
1848 if (t == trans[i]) {
1849 error(_("repeated leap second moment"));
1850 (void) exit(EXIT_FAILURE);
1851 }
1852 break;
1853 }
1854 do {
1855 for (j = leapcnt; j > i; --j) {
1856 trans[j] = trans[j - 1];
1857 corr[j] = corr[j - 1];
1858 roll[j] = roll[j - 1];
1859 }
1860 trans[i] = t;
1861 corr[i] = positive ? 1L : eitol(-count);
1862 roll[i] = rolling;
1863 ++leapcnt;
1864 } while (positive && --count != 0);
1865 }
1866
1867 static void
1868 adjleap P((void))
1869 {
1870 register int i;
1871 register long last = 0;
1872
1873 /*
1874 ** propagate leap seconds forward
1875 */
1876 for (i = 0; i < leapcnt; ++i) {
1877 trans[i] = tadd(trans[i], last);
1878 last = corr[i] += last;
1879 }
1880 }
1881
1882 static int
1883 yearistype(year, type)
1884 const int year;
1885 const char * const type;
1886 {
1887 static char * buf;
1888 int result;
1889
1890 if (type == NULL || *type == '\0')
1891 return TRUE;
1892 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
1893 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
1894 result = system(buf);
1895 if (result == 0)
1896 return TRUE;
1897 if (result == (1 << 8))
1898 return FALSE;
1899 error(_("Wild result from command execution"));
1900 (void) fprintf(stderr, _("%s: command was '%s', result was %d\n"),
1901 progname, buf, result);
1902 for ( ; ; )
1903 (void) exit(EXIT_FAILURE);
1904 }
1905
1906 static int
1907 lowerit(a)
1908 int a;
1909 {
1910 a = (unsigned char) a;
1911 return (isascii(a) && isupper(a)) ? tolower(a) : a;
1912 }
1913
1914 static int
1915 ciequal(ap, bp) /* case-insensitive equality */
1916 register const char * ap;
1917 register const char * bp;
1918 {
1919 while (lowerit(*ap) == lowerit(*bp++))
1920 if (*ap++ == '\0')
1921 return TRUE;
1922 return FALSE;
1923 }
1924
1925 static int
1926 itsabbr(abbr, word)
1927 register const char * abbr;
1928 register const char * word;
1929 {
1930 if (lowerit(*abbr) != lowerit(*word))
1931 return FALSE;
1932 ++word;
1933 while (*++abbr != '\0')
1934 do {
1935 if (*word == '\0')
1936 return FALSE;
1937 } while (lowerit(*word++) != lowerit(*abbr));
1938 return TRUE;
1939 }
1940
1941 static const struct lookup *
1942 byword(word, table)
1943 register const char * const word;
1944 register const struct lookup * const table;
1945 {
1946 register const struct lookup * foundlp;
1947 register const struct lookup * lp;
1948
1949 if (word == NULL || table == NULL)
1950 return NULL;
1951 /*
1952 ** Look for exact match.
1953 */
1954 for (lp = table; lp->l_word != NULL; ++lp)
1955 if (ciequal(word, lp->l_word))
1956 return lp;
1957 /*
1958 ** Look for inexact match.
1959 */
1960 foundlp = NULL;
1961 for (lp = table; lp->l_word != NULL; ++lp)
1962 if (itsabbr(word, lp->l_word)) {
1963 if (foundlp == NULL)
1964 foundlp = lp;
1965 else return NULL; /* multiple inexact matches */
1966 }
1967 return foundlp;
1968 }
1969
1970 static char **
1971 getfields(cp)
1972 register char * cp;
1973 {
1974 register char * dp;
1975 register char ** array;
1976 register int nsubs;
1977
1978 if (cp == NULL)
1979 return NULL;
1980 array = (char **) (void *)
1981 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1982 nsubs = 0;
1983 for ( ; ; ) {
1984 while (isascii(*cp) && isspace((unsigned char) *cp))
1985 ++cp;
1986 if (*cp == '\0' || *cp == '#')
1987 break;
1988 array[nsubs++] = dp = cp;
1989 do {
1990 if ((*dp = *cp++) != '"')
1991 ++dp;
1992 else while ((*dp = *cp++) != '"')
1993 if (*dp != '\0')
1994 ++dp;
1995 else error(_("Odd number of quotation marks"));
1996 } while (*cp != '\0' && *cp != '#' &&
1997 (!isascii(*cp) || !isspace((unsigned char) *cp)));
1998 if (isascii(*cp) && isspace((unsigned char) *cp))
1999 ++cp;
2000 *dp = '\0';
2001 }
2002 array[nsubs] = NULL;
2003 return array;
2004 }
2005
2006 static long
2007 oadd(t1, t2)
2008 const long t1;
2009 const long t2;
2010 {
2011 register long t;
2012
2013 t = t1 + t2;
2014 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2015 error(_("time overflow"));
2016 (void) exit(EXIT_FAILURE);
2017 }
2018 return t;
2019 }
2020
2021 static time_t
2022 tadd(t1, t2)
2023 const time_t t1;
2024 const long t2;
2025 {
2026 register time_t t;
2027
2028 if (t1 == max_time && t2 > 0)
2029 return max_time;
2030 if (t1 == min_time && t2 < 0)
2031 return min_time;
2032 t = t1 + t2;
2033 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2034 error(_("time overflow"));
2035 (void) exit(EXIT_FAILURE);
2036 }
2037 return t;
2038 }
2039
2040 /*
2041 ** Given a rule, and a year, compute the date - in seconds since January 1,
2042 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2043 */
2044
2045 static time_t
2046 rpytime(rp, wantedy)
2047 register const struct rule * const rp;
2048 register const int wantedy;
2049 {
2050 register int y, m, i;
2051 register long dayoff; /* with a nod to Margaret O. */
2052 register time_t t;
2053
2054 if (wantedy == INT_MIN)
2055 return min_time;
2056 if (wantedy == INT_MAX)
2057 return max_time;
2058 dayoff = 0;
2059 m = TM_JANUARY;
2060 y = EPOCH_YEAR;
2061 while (wantedy != y) {
2062 if (wantedy > y) {
2063 i = len_years[isleap(y)];
2064 ++y;
2065 } else {
2066 --y;
2067 i = -len_years[isleap(y)];
2068 }
2069 dayoff = oadd(dayoff, eitol(i));
2070 }
2071 while (m != rp->r_month) {
2072 i = len_months[isleap(y)][m];
2073 dayoff = oadd(dayoff, eitol(i));
2074 ++m;
2075 }
2076 i = rp->r_dayofmonth;
2077 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2078 if (rp->r_dycode == DC_DOWLEQ)
2079 --i;
2080 else {
2081 error(_("use of 2/29 in non leap-year"));
2082 (void) exit(EXIT_FAILURE);
2083 }
2084 }
2085 --i;
2086 dayoff = oadd(dayoff, eitol(i));
2087 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2088 register long wday;
2089
2090 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2091 wday = eitol(EPOCH_WDAY);
2092 /*
2093 ** Don't trust mod of negative numbers.
2094 */
2095 if (dayoff >= 0)
2096 wday = (wday + dayoff) % LDAYSPERWEEK;
2097 else {
2098 wday -= ((-dayoff) % LDAYSPERWEEK);
2099 if (wday < 0)
2100 wday += LDAYSPERWEEK;
2101 }
2102 while (wday != eitol(rp->r_wday))
2103 if (rp->r_dycode == DC_DOWGEQ) {
2104 dayoff = oadd(dayoff, (long) 1);
2105 if (++wday >= LDAYSPERWEEK)
2106 wday = 0;
2107 ++i;
2108 } else {
2109 dayoff = oadd(dayoff, (long) -1);
2110 if (--wday < 0)
2111 wday = LDAYSPERWEEK - 1;
2112 --i;
2113 }
2114 if (i < 0 || i >= len_months[isleap(y)][m]) {
2115 error(_("no day in month matches rule"));
2116 (void) exit(EXIT_FAILURE);
2117 }
2118 }
2119 if (dayoff < 0 && !TYPE_SIGNED(time_t))
2120 return min_time;
2121 t = (time_t) dayoff * SECSPERDAY;
2122 /*
2123 ** Cheap overflow check.
2124 */
2125 if (t / SECSPERDAY != dayoff)
2126 return (dayoff > 0) ? max_time : min_time;
2127 return tadd(t, rp->r_tod);
2128 }
2129
2130 static void
2131 newabbr(string)
2132 const char * const string;
2133 {
2134 register int i;
2135
2136 i = strlen(string) + 1;
2137 if (charcnt + i > TZ_MAX_CHARS) {
2138 error(_("too many, or too long, time zone abbreviations"));
2139 (void) exit(EXIT_FAILURE);
2140 }
2141 (void) strcpy(&chars[charcnt], string);
2142 charcnt += eitol(i);
2143 }
2144
2145 static int
2146 mkdirs(argname)
2147 char * const argname;
2148 {
2149 register char * name;
2150 register char * cp;
2151
2152 if (argname == NULL || *argname == '\0')
2153 return 0;
2154 cp = name = ecpyalloc(argname);
2155 while ((cp = strchr(cp + 1, '/')) != 0) {
2156 *cp = '\0';
2157 #ifndef unix
2158 /*
2159 ** DOS drive specifier?
2160 */
2161 if (isalpha((unsigned char) name[0]) &&
2162 name[1] == ':' && name[2] == '\0') {
2163 *cp = '/';
2164 continue;
2165 }
2166 #endif /* !defined unix */
2167 if (!itsdir(name)) {
2168 /*
2169 ** It doesn't seem to exist, so we try to create it.
2170 ** Creation may fail because of the directory being
2171 ** created by some other multiprocessor, so we get
2172 ** to do extra checking.
2173 */
2174 if (mkdir(name, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) != 0) {
2175 const char *e = strerror(errno);
2176
2177 if (errno != EEXIST || !itsdir(name)) {
2178 (void) fprintf(stderr,
2179 _("%s: Can't create directory %s: %s\n"),
2180 progname, name, e);
2181 ifree(name);
2182 return -1;
2183 }
2184 }
2185 }
2186 *cp = '/';
2187 }
2188 ifree(name);
2189 return 0;
2190 }
2191
2192 static long
2193 eitol(i)
2194 const int i;
2195 {
2196 long l;
2197
2198 l = i;
2199 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0)) {
2200 (void) fprintf(stderr,
2201 _("%s: %d did not sign extend correctly\n"),
2202 progname, i);
2203 (void) exit(EXIT_FAILURE);
2204 }
2205 return l;
2206 }
2207
2208 /*
2209 ** UNIX was a registered trademark of UNIX System Laboratories in 1993.
2210 */
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