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[apple/system_cmds.git] / zic.tproj / zic.c
1 static const char elsieid[] = "@(#)zic.c 7.116";
2
3 #ifndef lint
4 static const char rcsid[] =
5 "$FreeBSD: src/usr.sbin/zic/zic.c,v 1.17 2004/10/19 20:30:09 ru Exp $";
6 #endif /* not lint */
7
8 #include "private.h"
9 #include "tzfile.h"
10 #include <err.h>
11 #include <locale.h>
12 #include <sys/stat.h> /* for umask manifest constants */
13 #include <sys/types.h>
14 #include <unistd.h>
15
16 #define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
17
18 /*
19 ** On some ancient hosts, predicates like `isspace(C)' are defined
20 ** only if isascii(C) || C == EOF. Modern hosts obey the C Standard,
21 ** which says they are defined only if C == ((unsigned char) C) || C == EOF.
22 ** Neither the C Standard nor POSIX require that `isascii' exist.
23 ** For portability, we check both ancient and modern requirements.
24 ** If isascii is not defined, the isascii check succeeds trivially.
25 */
26 #include "ctype.h"
27 #ifndef isascii
28 #define isascii(x) 1
29 #endif
30
31 struct rule {
32 const char * r_filename;
33 int r_linenum;
34 const char * r_name;
35
36 int r_loyear; /* for example, 1986 */
37 int r_hiyear; /* for example, 1986 */
38 const char * r_yrtype;
39
40 int r_month; /* 0..11 */
41
42 int r_dycode; /* see below */
43 int r_dayofmonth;
44 int r_wday;
45
46 long r_tod; /* time from midnight */
47 int r_todisstd; /* above is standard time if TRUE */
48 /* or wall clock time if FALSE */
49 int r_todisgmt; /* above is GMT if TRUE */
50 /* or local time if FALSE */
51 long r_stdoff; /* offset from standard time */
52 const char * r_abbrvar; /* variable part of abbreviation */
53
54 int r_todo; /* a rule to do (used in outzone) */
55 time_t r_temp; /* used in outzone */
56 };
57
58 /*
59 ** r_dycode r_dayofmonth r_wday
60 */
61
62 #define DC_DOM 0 /* 1..31 */ /* unused */
63 #define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
64 #define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
65
66 struct zone {
67 const char * z_filename;
68 int z_linenum;
69
70 const char * z_name;
71 long z_gmtoff;
72 const char * z_rule;
73 const char * z_format;
74
75 long z_stdoff;
76
77 struct rule * z_rules;
78 int z_nrules;
79
80 struct rule z_untilrule;
81 time_t z_untiltime;
82 };
83
84 static void addtt P((time_t starttime, int type));
85 static int addtype P((long gmtoff, const char * abbr, int isdst,
86 int ttisstd, int ttisgmt));
87 static void leapadd P((time_t t, int positive, int rolling, int count));
88 static void adjleap P((void));
89 static void associate P((void));
90 static int ciequal P((const char * ap, const char * bp));
91 static void convert P((long val, char * buf));
92 static void dolink P((const char * fromfile, const char * tofile));
93 static void doabbr P((char * abbr, const char * format,
94 const char * letters, int isdst));
95 static void eat P((const char * name, int num));
96 static void eats P((const char * name, int num,
97 const char * rname, int rnum));
98 static long eitol P((int i));
99 static void error P((const char * message));
100 static char ** getfields P((char * buf));
101 static long gethms P((const char * string, const char * errstrng,
102 int signable));
103 static void infile P((const char * filename));
104 static void inleap P((char ** fields, int nfields));
105 static void inlink P((char ** fields, int nfields));
106 static void inrule P((char ** fields, int nfields));
107 static int inzcont P((char ** fields, int nfields));
108 static int inzone P((char ** fields, int nfields));
109 static int inzsub P((char ** fields, int nfields, int iscont));
110 static int itsabbr P((const char * abbr, const char * word));
111 static int itsdir P((const char * name));
112 static int lowerit P((int c));
113 static char * memcheck P((char * tocheck));
114 static int mkdirs P((char * filename));
115 static void newabbr P((const char * abbr));
116 static long oadd P((long t1, long t2));
117 static void outzone P((const struct zone * zp, int ntzones));
118 static void puttzcode P((long code, FILE * fp));
119 static int rcomp P((const void * leftp, const void * rightp));
120 static time_t rpytime P((const struct rule * rp, int wantedy));
121 static void rulesub P((struct rule * rp,
122 const char * loyearp, const char * hiyearp,
123 const char * typep, const char * monthp,
124 const char * dayp, const char * timep));
125 static void setboundaries P((void));
126 static void setgroup P((gid_t *flag, const char *name));
127 static void setuser P((uid_t *flag, const char *name));
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 int timecnt;
152 static int typecnt;
153
154 /*
155 ** Line codes.
156 */
157
158 #define LC_RULE 0
159 #define LC_ZONE 1
160 #define LC_LINK 2
161 #define LC_LEAP 3
162
163 /*
164 ** Which fields are which on a Zone line.
165 */
166
167 #define ZF_NAME 1
168 #define ZF_GMTOFF 2
169 #define ZF_RULE 3
170 #define ZF_FORMAT 4
171 #define ZF_TILYEAR 5
172 #define ZF_TILMONTH 6
173 #define ZF_TILDAY 7
174 #define ZF_TILTIME 8
175 #define ZONE_MINFIELDS 5
176 #define ZONE_MAXFIELDS 9
177
178 /*
179 ** Which fields are which on a Zone continuation line.
180 */
181
182 #define ZFC_GMTOFF 0
183 #define ZFC_RULE 1
184 #define ZFC_FORMAT 2
185 #define ZFC_TILYEAR 3
186 #define ZFC_TILMONTH 4
187 #define ZFC_TILDAY 5
188 #define ZFC_TILTIME 6
189 #define ZONEC_MINFIELDS 3
190 #define ZONEC_MAXFIELDS 7
191
192 /*
193 ** Which files are which on a Rule line.
194 */
195
196 #define RF_NAME 1
197 #define RF_LOYEAR 2
198 #define RF_HIYEAR 3
199 #define RF_COMMAND 4
200 #define RF_MONTH 5
201 #define RF_DAY 6
202 #define RF_TOD 7
203 #define RF_STDOFF 8
204 #define RF_ABBRVAR 9
205 #define RULE_FIELDS 10
206
207 /*
208 ** Which fields are which on a Link line.
209 */
210
211 #define LF_FROM 1
212 #define LF_TO 2
213 #define LINK_FIELDS 3
214
215 /*
216 ** Which fields are which on a Leap line.
217 */
218
219 #define LP_YEAR 1
220 #define LP_MONTH 2
221 #define LP_DAY 3
222 #define LP_TIME 4
223 #define LP_CORR 5
224 #define LP_ROLL 6
225 #define LEAP_FIELDS 7
226
227 /*
228 ** Year synonyms.
229 */
230
231 #define YR_MINIMUM 0
232 #define YR_MAXIMUM 1
233 #define YR_ONLY 2
234
235 static struct rule * rules;
236 static int nrules; /* number of rules */
237
238 static struct zone * zones;
239 static int nzones; /* number of zones */
240
241 struct link {
242 const char * l_filename;
243 int l_linenum;
244 const char * l_from;
245 const char * l_to;
246 };
247
248 static struct link * links;
249 static int nlinks;
250
251 struct lookup {
252 const char * l_word;
253 const int l_value;
254 };
255
256 static struct lookup const * byword P((const char * string,
257 const struct lookup * lp));
258
259 static struct lookup const line_codes[] = {
260 { "Rule", LC_RULE },
261 { "Zone", LC_ZONE },
262 { "Link", LC_LINK },
263 { "Leap", LC_LEAP },
264 { NULL, 0}
265 };
266
267 static struct lookup const mon_names[] = {
268 { "January", TM_JANUARY },
269 { "February", TM_FEBRUARY },
270 { "March", TM_MARCH },
271 { "April", TM_APRIL },
272 { "May", TM_MAY },
273 { "June", TM_JUNE },
274 { "July", TM_JULY },
275 { "August", TM_AUGUST },
276 { "September", TM_SEPTEMBER },
277 { "October", TM_OCTOBER },
278 { "November", TM_NOVEMBER },
279 { "December", TM_DECEMBER },
280 { NULL, 0 }
281 };
282
283 static struct lookup const wday_names[] = {
284 { "Sunday", TM_SUNDAY },
285 { "Monday", TM_MONDAY },
286 { "Tuesday", TM_TUESDAY },
287 { "Wednesday", TM_WEDNESDAY },
288 { "Thursday", TM_THURSDAY },
289 { "Friday", TM_FRIDAY },
290 { "Saturday", TM_SATURDAY },
291 { NULL, 0 }
292 };
293
294 static struct lookup const lasts[] = {
295 { "last-Sunday", TM_SUNDAY },
296 { "last-Monday", TM_MONDAY },
297 { "last-Tuesday", TM_TUESDAY },
298 { "last-Wednesday", TM_WEDNESDAY },
299 { "last-Thursday", TM_THURSDAY },
300 { "last-Friday", TM_FRIDAY },
301 { "last-Saturday", TM_SATURDAY },
302 { NULL, 0 }
303 };
304
305 static struct lookup const begin_years[] = {
306 { "minimum", YR_MINIMUM },
307 { "maximum", YR_MAXIMUM },
308 { NULL, 0 }
309 };
310
311 static struct lookup const end_years[] = {
312 { "minimum", YR_MINIMUM },
313 { "maximum", YR_MAXIMUM },
314 { "only", YR_ONLY },
315 { NULL, 0 }
316 };
317
318 static struct lookup const leap_types[] = {
319 { "Rolling", TRUE },
320 { "Stationary", FALSE },
321 { NULL, 0 }
322 };
323
324 static const int len_months[2][MONSPERYEAR] = {
325 { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
326 { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
327 };
328
329 static const int len_years[2] = {
330 DAYSPERNYEAR, DAYSPERLYEAR
331 };
332
333 static struct attype {
334 time_t at;
335 unsigned char type;
336 } attypes[TZ_MAX_TIMES];
337 static long gmtoffs[TZ_MAX_TYPES];
338 static char isdsts[TZ_MAX_TYPES];
339 static unsigned char abbrinds[TZ_MAX_TYPES];
340 static char ttisstds[TZ_MAX_TYPES];
341 static char ttisgmts[TZ_MAX_TYPES];
342 static char chars[TZ_MAX_CHARS];
343 static time_t trans[TZ_MAX_LEAPS];
344 static long corr[TZ_MAX_LEAPS];
345 static char roll[TZ_MAX_LEAPS];
346
347 /*
348 ** Memory allocation.
349 */
350
351 static char *
352 memcheck(ptr)
353 char * const ptr;
354 {
355 if (ptr == NULL)
356 errx(EXIT_FAILURE, _("memory exhausted"));
357 return ptr;
358 }
359
360 #define emalloc(size) memcheck(imalloc(size))
361 #define erealloc(ptr, size) memcheck(irealloc((ptr), (size)))
362 #define ecpyalloc(ptr) memcheck(icpyalloc(ptr))
363 #define ecatalloc(oldp, newp) memcheck(icatalloc((oldp), (newp)))
364
365 /*
366 ** Error handling.
367 */
368
369 #if !(HAVE_STRERROR - 0)
370 static char *
371 strerror(errnum)
372 int errnum;
373 {
374 extern char * sys_errlist[];
375 extern int sys_nerr;
376
377 return (errnum > 0 && errnum <= sys_nerr) ?
378 sys_errlist[errnum] : _("Unknown system error");
379 }
380 #endif /* !(HAVE_STRERROR - 0) */
381
382 static void
383 eats(name, num, rname, rnum)
384 const char * const name;
385 const int num;
386 const char * const rname;
387 const int rnum;
388 {
389 filename = name;
390 linenum = num;
391 rfilename = rname;
392 rlinenum = rnum;
393 }
394
395 static void
396 eat(name, num)
397 const char * const name;
398 const int num;
399 {
400 eats(name, num, (char *) NULL, -1);
401 }
402
403 static void
404 error(string)
405 const char * const string;
406 {
407 /*
408 ** Match the format of "cc" to allow sh users to
409 ** zic ... 2>&1 | error -t "*" -v
410 ** on BSD systems.
411 */
412 (void) fprintf(stderr, _("\"%s\", line %d: %s"),
413 filename, linenum, string);
414 if (rfilename != NULL)
415 (void) fprintf(stderr, _(" (rule from \"%s\", line %d)"),
416 rfilename, rlinenum);
417 (void) fprintf(stderr, "\n");
418 ++errors;
419 }
420
421 static void
422 warning(string)
423 const char * const string;
424 {
425 char * cp;
426
427 cp = ecpyalloc(_("warning: "));
428 cp = ecatalloc(cp, string);
429 error(cp);
430 ifree(cp);
431 --errors;
432 }
433
434 static void
435 usage P((void))
436 {
437 (void) fprintf(stderr, "%s\n%s\n",
438 _("usage: zic [--version] [-s] [-v] [-l localtime] [-p posixrules] [-d directory]"),
439 _(" [-L leapseconds] [-y yearistype] [filename ... ]"));
440 (void) exit(EXIT_FAILURE);
441 }
442
443 static const char * psxrules;
444 static const char * lcltime;
445 static const char * directory;
446 static const char * leapsec;
447 static const char * yitcommand;
448 static int sflag = FALSE;
449 static int Dflag;
450 static uid_t uflag = (uid_t)-1;
451 static gid_t gflag = (gid_t)-1;
452 static mode_t mflag = (S_IRUSR | S_IRGRP | S_IROTH
453 | S_IWUSR);
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 for (i = 1; i < argc; ++i)
475 if (strcmp(argv[i], "--version") == 0) {
476 errx(EXIT_SUCCESS, "%s", elsieid);
477 }
478 while ((c = getopt(argc, argv, "Dd:g:l:m:p:L:u:vsy:")) != -1)
479 switch (c) {
480 default:
481 usage();
482 case 'D':
483 Dflag = 1;
484 break;
485 case 'd':
486 if (directory == NULL)
487 directory = optarg;
488 else
489 errx(EXIT_FAILURE,
490 _("more than one -d option specified"));
491 break;
492 case 'g':
493 setgroup(&gflag, optarg);
494 break;
495 case 'l':
496 if (lcltime == NULL)
497 lcltime = optarg;
498 else
499 errx(EXIT_FAILURE,
500 _("more than one -l option specified"));
501 break;
502 case 'm':
503 {
504 void *set = setmode(optarg);
505 if (set == NULL)
506 errx(EXIT_FAILURE,
507 _("invalid file mode"));
508 mflag = getmode(set, mflag);
509 free(set);
510 break;
511 }
512 case 'p':
513 if (psxrules == NULL)
514 psxrules = optarg;
515 else
516 errx(EXIT_FAILURE,
517 _("more than one -p option specified"));
518 break;
519 case 'u':
520 setuser(&uflag, optarg);
521 break;
522 case 'y':
523 if (yitcommand == NULL)
524 yitcommand = optarg;
525 else
526 errx(EXIT_FAILURE,
527 _("more than one -y option specified"));
528 break;
529 case 'L':
530 if (leapsec == NULL)
531 leapsec = optarg;
532 else
533 errx(EXIT_FAILURE,
534 _("more than one -L option specified"));
535 break;
536 case 'v':
537 noise = TRUE;
538 break;
539 case 's':
540 sflag = TRUE;
541 break;
542 }
543 if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
544 usage(); /* usage message by request */
545 if (directory == NULL)
546 directory = TZDIR;
547 if (yitcommand == NULL)
548 yitcommand = "yearistype";
549
550 setboundaries();
551
552 if (optind < argc && leapsec != NULL) {
553 infile(leapsec);
554 adjleap();
555 }
556
557 for (i = optind; i < argc; ++i)
558 infile(argv[i]);
559 if (errors)
560 (void) exit(EXIT_FAILURE);
561 associate();
562 for (i = 0; i < nzones; i = j) {
563 /*
564 ** Find the next non-continuation zone entry.
565 */
566 for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
567 continue;
568 outzone(&zones[i], j - i);
569 }
570 /*
571 ** Make links.
572 */
573 for (i = 0; i < nlinks; ++i) {
574 eat(links[i].l_filename, links[i].l_linenum);
575 dolink(links[i].l_from, links[i].l_to);
576 }
577 if (lcltime != NULL) {
578 eat("command line", 1);
579 dolink(lcltime, TZDEFAULT);
580 }
581 if (psxrules != NULL) {
582 eat("command line", 1);
583 dolink(psxrules, TZDEFRULES);
584 }
585 return (errors == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
586 }
587
588 static void
589 dolink(fromfile, tofile)
590 const char * const fromfile;
591 const char * const tofile;
592 {
593 register char * fromname;
594 register char * toname;
595
596 if (fromfile[0] == '/')
597 fromname = ecpyalloc(fromfile);
598 else {
599 fromname = ecpyalloc(directory);
600 fromname = ecatalloc(fromname, "/");
601 fromname = ecatalloc(fromname, fromfile);
602 }
603 if (tofile[0] == '/')
604 toname = ecpyalloc(tofile);
605 else {
606 toname = ecpyalloc(directory);
607 toname = ecatalloc(toname, "/");
608 toname = ecatalloc(toname, tofile);
609 }
610 /*
611 ** We get to be careful here since
612 ** there's a fair chance of root running us.
613 */
614 if (!itsdir(toname))
615 (void) remove(toname);
616 if (link(fromname, toname) != 0) {
617 int result;
618
619 if (mkdirs(toname) != 0)
620 (void) exit(EXIT_FAILURE);
621
622 result = link(fromname, toname);
623 #if (HAVE_SYMLINK - 0)
624 if (result != 0 &&
625 access(fromname, F_OK) == 0 &&
626 !itsdir(fromname)) {
627 const char *s = tofile;
628 register char * symlinkcontents = NULL;
629 while ((s = strchr(s+1, '/')) != NULL)
630 symlinkcontents = ecatalloc(symlinkcontents, "../");
631 symlinkcontents = ecatalloc(symlinkcontents, fromfile);
632
633 result = symlink(symlinkcontents, toname);
634 if (result == 0)
635 warning(_("hard link failed, symbolic link used"));
636 ifree(symlinkcontents);
637 }
638 #endif
639 if (result != 0) {
640 err(EXIT_FAILURE, _("can't link from %s to %s"),
641 fromname, toname);
642 }
643 }
644 ifree(fromname);
645 ifree(toname);
646 }
647
648 #ifndef INT_MAX
649 #define INT_MAX ((int) (((unsigned)~0)>>1))
650 #endif /* !defined INT_MAX */
651
652 #ifndef INT_MIN
653 #define INT_MIN ((int) ~(((unsigned)~0)>>1))
654 #endif /* !defined INT_MIN */
655
656 /*
657 ** The tz file format currently allows at most 32-bit quantities.
658 ** This restriction should be removed before signed 32-bit values
659 ** wrap around in 2038, but unfortunately this will require a
660 ** change to the tz file format.
661 */
662
663 #define MAX_BITS_IN_FILE 32
664 #define TIME_T_BITS_IN_FILE ((TYPE_BIT(time_t) < MAX_BITS_IN_FILE) ? TYPE_BIT(time_t) : MAX_BITS_IN_FILE)
665
666 static void
667 setboundaries P((void))
668 {
669 if (TYPE_SIGNED(time_t)) {
670 min_time = ~ (time_t) 0;
671 min_time <<= TIME_T_BITS_IN_FILE - 1;
672 max_time = ~ (time_t) 0 - min_time;
673 if (sflag)
674 min_time = 0;
675 } else {
676 min_time = 0;
677 max_time = 2 - sflag;
678 max_time <<= TIME_T_BITS_IN_FILE - 1;
679 --max_time;
680 }
681 min_year = TM_YEAR_BASE + gmtime(&min_time)->tm_year;
682 max_year = TM_YEAR_BASE + gmtime(&max_time)->tm_year;
683 min_year_representable = min_year;
684 max_year_representable = max_year;
685 }
686
687 static int
688 itsdir(name)
689 const char * const name;
690 {
691 register char * myname;
692 register int accres;
693
694 myname = ecpyalloc(name);
695 myname = ecatalloc(myname, "/.");
696 accres = access(myname, F_OK);
697 ifree(myname);
698 return accres == 0;
699 }
700
701 /*
702 ** Associate sets of rules with zones.
703 */
704
705 /*
706 ** Sort by rule name.
707 */
708
709 static int
710 rcomp(cp1, cp2)
711 const void * cp1;
712 const void * cp2;
713 {
714 return strcmp(((const struct rule *) cp1)->r_name,
715 ((const struct rule *) cp2)->r_name);
716 }
717
718 static void
719 associate P((void))
720 {
721 register struct zone * zp;
722 register struct rule * rp;
723 register int base, out;
724 register int i, j;
725
726 if (nrules != 0) {
727 (void) qsort((void *) rules, (size_t) nrules,
728 (size_t) sizeof *rules, rcomp);
729 for (i = 0; i < nrules - 1; ++i) {
730 if (strcmp(rules[i].r_name,
731 rules[i + 1].r_name) != 0)
732 continue;
733 if (strcmp(rules[i].r_filename,
734 rules[i + 1].r_filename) == 0)
735 continue;
736 eat(rules[i].r_filename, rules[i].r_linenum);
737 warning(_("same rule name in multiple files"));
738 eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
739 warning(_("same rule name in multiple files"));
740 for (j = i + 2; j < nrules; ++j) {
741 if (strcmp(rules[i].r_name,
742 rules[j].r_name) != 0)
743 break;
744 if (strcmp(rules[i].r_filename,
745 rules[j].r_filename) == 0)
746 continue;
747 if (strcmp(rules[i + 1].r_filename,
748 rules[j].r_filename) == 0)
749 continue;
750 break;
751 }
752 i = j - 1;
753 }
754 }
755 for (i = 0; i < nzones; ++i) {
756 zp = &zones[i];
757 zp->z_rules = NULL;
758 zp->z_nrules = 0;
759 }
760 for (base = 0; base < nrules; base = out) {
761 rp = &rules[base];
762 for (out = base + 1; out < nrules; ++out)
763 if (strcmp(rp->r_name, rules[out].r_name) != 0)
764 break;
765 for (i = 0; i < nzones; ++i) {
766 zp = &zones[i];
767 if (strcmp(zp->z_rule, rp->r_name) != 0)
768 continue;
769 zp->z_rules = rp;
770 zp->z_nrules = out - base;
771 }
772 }
773 for (i = 0; i < nzones; ++i) {
774 zp = &zones[i];
775 if (zp->z_nrules == 0) {
776 /*
777 ** Maybe we have a local standard time offset.
778 */
779 eat(zp->z_filename, zp->z_linenum);
780 zp->z_stdoff = gethms(zp->z_rule, _("unruly zone"),
781 TRUE);
782 /*
783 ** Note, though, that if there's no rule,
784 ** a '%s' in the format is a bad thing.
785 */
786 if (strchr(zp->z_format, '%') != 0)
787 error(_("%s in ruleless zone"));
788 }
789 }
790 if (errors)
791 (void) exit(EXIT_FAILURE);
792 }
793
794 static void
795 infile(name)
796 const char * name;
797 {
798 register FILE * fp;
799 register char ** fields;
800 register char * cp;
801 register const struct lookup * lp;
802 register int nfields;
803 register int wantcont;
804 register int num;
805 char buf[BUFSIZ];
806
807 if (strcmp(name, "-") == 0) {
808 name = _("standard input");
809 fp = stdin;
810 } else if ((fp = fopen(name, "r")) == NULL)
811 err(EXIT_FAILURE, _("can't open %s"), name);
812 wantcont = FALSE;
813 for (num = 1; ; ++num) {
814 eat(name, num);
815 if (fgets(buf, (int) sizeof buf, fp) != buf)
816 break;
817 cp = strchr(buf, '\n');
818 if (cp == NULL) {
819 error(_("line too long"));
820 (void) exit(EXIT_FAILURE);
821 }
822 *cp = '\0';
823 fields = getfields(buf);
824 nfields = 0;
825 while (fields[nfields] != NULL) {
826 static char nada;
827
828 if (strcmp(fields[nfields], "-") == 0)
829 fields[nfields] = &nada;
830 ++nfields;
831 }
832 if (nfields == 0) {
833 /* nothing to do */
834 } else if (wantcont) {
835 wantcont = inzcont(fields, nfields);
836 } else {
837 lp = byword(fields[0], line_codes);
838 if (lp == NULL)
839 error(_("input line of unknown type"));
840 else switch ((int) (lp->l_value)) {
841 case LC_RULE:
842 inrule(fields, nfields);
843 wantcont = FALSE;
844 break;
845 case LC_ZONE:
846 wantcont = inzone(fields, nfields);
847 break;
848 case LC_LINK:
849 inlink(fields, nfields);
850 wantcont = FALSE;
851 break;
852 case LC_LEAP:
853 if (name != leapsec)
854 warnx(
855 _("leap line in non leap seconds file %s"), name);
856 else inleap(fields, nfields);
857 wantcont = FALSE;
858 break;
859 default: /* "cannot happen" */
860 errx(EXIT_FAILURE,
861 _("panic: invalid l_value %d"), lp->l_value);
862 }
863 }
864 ifree((char *) fields);
865 }
866 if (ferror(fp))
867 errx(EXIT_FAILURE, _("error reading %s"), filename);
868 if (fp != stdin && fclose(fp))
869 err(EXIT_FAILURE, _("error closing %s"), filename);
870 if (wantcont)
871 error(_("expected continuation line not found"));
872 }
873
874 /*
875 ** Convert a string of one of the forms
876 ** h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
877 ** into a number of seconds.
878 ** A null string maps to zero.
879 ** Call error with errstring and return zero on errors.
880 */
881
882 static long
883 gethms(string, errstring, signable)
884 const char * string;
885 const char * const errstring;
886 const int signable;
887 {
888 int hh, mm, ss, sign;
889
890 if (string == NULL || *string == '\0')
891 return 0;
892 if (!signable)
893 sign = 1;
894 else if (*string == '-') {
895 sign = -1;
896 ++string;
897 } else sign = 1;
898 if (sscanf(string, scheck(string, "%d"), &hh) == 1)
899 mm = ss = 0;
900 else if (sscanf(string, scheck(string, "%d:%d"), &hh, &mm) == 2)
901 ss = 0;
902 else if (sscanf(string, scheck(string, "%d:%d:%d"),
903 &hh, &mm, &ss) != 3) {
904 error(errstring);
905 return 0;
906 }
907 if ((hh < 0 || hh >= HOURSPERDAY ||
908 mm < 0 || mm >= MINSPERHOUR ||
909 ss < 0 || ss > SECSPERMIN) &&
910 !(hh == HOURSPERDAY && mm == 0 && ss == 0)) {
911 error(errstring);
912 return 0;
913 }
914 if (noise && hh == HOURSPERDAY)
915 warning(_("24:00 not handled by pre-1998 versions of zic"));
916 return eitol(sign) *
917 (eitol(hh * MINSPERHOUR + mm) *
918 eitol(SECSPERMIN) + eitol(ss));
919 }
920
921 static void
922 inrule(fields, nfields)
923 register char ** const fields;
924 const int nfields;
925 {
926 static struct rule r;
927
928 if (nfields != RULE_FIELDS) {
929 error(_("wrong number of fields on Rule line"));
930 return;
931 }
932 if (*fields[RF_NAME] == '\0') {
933 error(_("nameless rule"));
934 return;
935 }
936 r.r_filename = filename;
937 r.r_linenum = linenum;
938 r.r_stdoff = gethms(fields[RF_STDOFF], _("invalid saved time"), TRUE);
939 rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
940 fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
941 r.r_name = ecpyalloc(fields[RF_NAME]);
942 r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
943 rules = (struct rule *) (void *) erealloc((char *) rules,
944 (int) ((nrules + 1) * sizeof *rules));
945 rules[nrules++] = r;
946 }
947
948 static int
949 inzone(fields, nfields)
950 register char ** const fields;
951 const int nfields;
952 {
953 register int i;
954 static char * buf;
955
956 if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS) {
957 error(_("wrong number of fields on Zone line"));
958 return FALSE;
959 }
960 if (strcmp(fields[ZF_NAME], TZDEFAULT) == 0 && lcltime != NULL) {
961 buf = erealloc(buf, (int) (132 + strlen(TZDEFAULT)));
962 (void) sprintf(buf,
963 _("\"Zone %s\" line and -l option are mutually exclusive"),
964 TZDEFAULT);
965 error(buf);
966 return FALSE;
967 }
968 if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL) {
969 buf = erealloc(buf, (int) (132 + strlen(TZDEFRULES)));
970 (void) sprintf(buf,
971 _("\"Zone %s\" line and -p option are mutually exclusive"),
972 TZDEFRULES);
973 error(buf);
974 return FALSE;
975 }
976 for (i = 0; i < nzones; ++i)
977 if (zones[i].z_name != NULL &&
978 strcmp(zones[i].z_name, fields[ZF_NAME]) == 0) {
979 buf = erealloc(buf, (int) (132 +
980 strlen(fields[ZF_NAME]) +
981 strlen(zones[i].z_filename)));
982 (void) sprintf(buf,
983 _("duplicate zone name %s (file \"%s\", line %d)"),
984 fields[ZF_NAME],
985 zones[i].z_filename,
986 zones[i].z_linenum);
987 error(buf);
988 return FALSE;
989 }
990 return inzsub(fields, nfields, FALSE);
991 }
992
993 static int
994 inzcont(fields, nfields)
995 register char ** const fields;
996 const int nfields;
997 {
998 if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS) {
999 error(_("wrong number of fields on Zone continuation line"));
1000 return FALSE;
1001 }
1002 return inzsub(fields, nfields, TRUE);
1003 }
1004
1005 static int
1006 inzsub(fields, nfields, iscont)
1007 register char ** const fields;
1008 const int nfields;
1009 const int iscont;
1010 {
1011 register char * cp;
1012 static struct zone z;
1013 register int i_gmtoff, i_rule, i_format;
1014 register int i_untilyear, i_untilmonth;
1015 register int i_untilday, i_untiltime;
1016 register int hasuntil;
1017
1018 if (iscont) {
1019 i_gmtoff = ZFC_GMTOFF;
1020 i_rule = ZFC_RULE;
1021 i_format = ZFC_FORMAT;
1022 i_untilyear = ZFC_TILYEAR;
1023 i_untilmonth = ZFC_TILMONTH;
1024 i_untilday = ZFC_TILDAY;
1025 i_untiltime = ZFC_TILTIME;
1026 z.z_name = NULL;
1027 } else {
1028 i_gmtoff = ZF_GMTOFF;
1029 i_rule = ZF_RULE;
1030 i_format = ZF_FORMAT;
1031 i_untilyear = ZF_TILYEAR;
1032 i_untilmonth = ZF_TILMONTH;
1033 i_untilday = ZF_TILDAY;
1034 i_untiltime = ZF_TILTIME;
1035 z.z_name = ecpyalloc(fields[ZF_NAME]);
1036 }
1037 z.z_filename = filename;
1038 z.z_linenum = linenum;
1039 z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UTC offset"), TRUE);
1040 if ((cp = strchr(fields[i_format], '%')) != 0) {
1041 if (*++cp != 's' || strchr(cp, '%') != 0) {
1042 error(_("invalid abbreviation format"));
1043 return FALSE;
1044 }
1045 }
1046 z.z_rule = ecpyalloc(fields[i_rule]);
1047 z.z_format = ecpyalloc(fields[i_format]);
1048 hasuntil = nfields > i_untilyear;
1049 if (hasuntil) {
1050 z.z_untilrule.r_filename = filename;
1051 z.z_untilrule.r_linenum = linenum;
1052 rulesub(&z.z_untilrule,
1053 fields[i_untilyear],
1054 "only",
1055 "",
1056 (nfields > i_untilmonth) ?
1057 fields[i_untilmonth] : "Jan",
1058 (nfields > i_untilday) ? fields[i_untilday] : "1",
1059 (nfields > i_untiltime) ? fields[i_untiltime] : "0");
1060 z.z_untiltime = rpytime(&z.z_untilrule,
1061 z.z_untilrule.r_loyear);
1062 if (iscont && nzones > 0 &&
1063 z.z_untiltime > min_time &&
1064 z.z_untiltime < max_time &&
1065 zones[nzones - 1].z_untiltime > min_time &&
1066 zones[nzones - 1].z_untiltime < max_time &&
1067 zones[nzones - 1].z_untiltime >= z.z_untiltime) {
1068 error(_("Zone continuation line end time is not after end time of previous line"));
1069 return FALSE;
1070 }
1071 }
1072 zones = (struct zone *) (void *) erealloc((char *) zones,
1073 (int) ((nzones + 1) * sizeof *zones));
1074 zones[nzones++] = z;
1075 /*
1076 ** If there was an UNTIL field on this line,
1077 ** there's more information about the zone on the next line.
1078 */
1079 return hasuntil;
1080 }
1081
1082 static void
1083 inleap(fields, nfields)
1084 register char ** const fields;
1085 const int nfields;
1086 {
1087 register const char * cp;
1088 register const struct lookup * lp;
1089 register int i, j;
1090 int year, month, day;
1091 long dayoff, tod;
1092 time_t t;
1093
1094 if (nfields != LEAP_FIELDS) {
1095 error(_("wrong number of fields on Leap line"));
1096 return;
1097 }
1098 dayoff = 0;
1099 cp = fields[LP_YEAR];
1100 if (sscanf(cp, scheck(cp, "%d"), &year) != 1) {
1101 /*
1102 * Leapin' Lizards!
1103 */
1104 error(_("invalid leaping year"));
1105 return;
1106 }
1107 j = EPOCH_YEAR;
1108 while (j != year) {
1109 if (year > j) {
1110 i = len_years[isleap(j)];
1111 ++j;
1112 } else {
1113 --j;
1114 i = -len_years[isleap(j)];
1115 }
1116 dayoff = oadd(dayoff, eitol(i));
1117 }
1118 if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL) {
1119 error(_("invalid month name"));
1120 return;
1121 }
1122 month = lp->l_value;
1123 j = TM_JANUARY;
1124 while (j != month) {
1125 i = len_months[isleap(year)][j];
1126 dayoff = oadd(dayoff, eitol(i));
1127 ++j;
1128 }
1129 cp = fields[LP_DAY];
1130 if (sscanf(cp, scheck(cp, "%d"), &day) != 1 ||
1131 day <= 0 || day > len_months[isleap(year)][month]) {
1132 error(_("invalid day of month"));
1133 return;
1134 }
1135 dayoff = oadd(dayoff, eitol(day - 1));
1136 if (dayoff < 0 && !TYPE_SIGNED(time_t)) {
1137 error(_("time before zero"));
1138 return;
1139 }
1140 if (dayoff < min_time / SECSPERDAY) {
1141 error(_("time too small"));
1142 return;
1143 }
1144 if (dayoff > max_time / SECSPERDAY) {
1145 error(_("time too large"));
1146 return;
1147 }
1148 t = (time_t) dayoff * SECSPERDAY;
1149 tod = gethms(fields[LP_TIME], _("invalid time of day"), FALSE);
1150 cp = fields[LP_CORR];
1151 {
1152 register int positive;
1153 int count;
1154
1155 if (strcmp(cp, "") == 0) { /* infile() turns "-" into "" */
1156 positive = FALSE;
1157 count = 1;
1158 } else if (strcmp(cp, "--") == 0) {
1159 positive = FALSE;
1160 count = 2;
1161 } else if (strcmp(cp, "+") == 0) {
1162 positive = TRUE;
1163 count = 1;
1164 } else if (strcmp(cp, "++") == 0) {
1165 positive = TRUE;
1166 count = 2;
1167 } else {
1168 error(_("illegal CORRECTION field on Leap line"));
1169 return;
1170 }
1171 if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL) {
1172 error(_("illegal Rolling/Stationary field on Leap line"));
1173 return;
1174 }
1175 leapadd(tadd(t, tod), positive, lp->l_value, count);
1176 }
1177 }
1178
1179 static void
1180 inlink(fields, nfields)
1181 register char ** const fields;
1182 const int nfields;
1183 {
1184 struct link l;
1185
1186 if (nfields != LINK_FIELDS) {
1187 error(_("wrong number of fields on Link line"));
1188 return;
1189 }
1190 if (*fields[LF_FROM] == '\0') {
1191 error(_("blank FROM field on Link line"));
1192 return;
1193 }
1194 if (*fields[LF_TO] == '\0') {
1195 error(_("blank TO field on Link line"));
1196 return;
1197 }
1198 l.l_filename = filename;
1199 l.l_linenum = linenum;
1200 l.l_from = ecpyalloc(fields[LF_FROM]);
1201 l.l_to = ecpyalloc(fields[LF_TO]);
1202 links = (struct link *) (void *) erealloc((char *) links,
1203 (int) ((nlinks + 1) * sizeof *links));
1204 links[nlinks++] = l;
1205 }
1206
1207 static void
1208 rulesub(rp, loyearp, hiyearp, typep, monthp, dayp, timep)
1209 register struct rule * const rp;
1210 const char * const loyearp;
1211 const char * const hiyearp;
1212 const char * const typep;
1213 const char * const monthp;
1214 const char * const dayp;
1215 const char * const timep;
1216 {
1217 register const struct lookup * lp;
1218 register const char * cp;
1219 register char * dp;
1220 register char * ep;
1221
1222 if ((lp = byword(monthp, mon_names)) == NULL) {
1223 error(_("invalid month name"));
1224 return;
1225 }
1226 rp->r_month = lp->l_value;
1227 rp->r_todisstd = FALSE;
1228 rp->r_todisgmt = FALSE;
1229 dp = ecpyalloc(timep);
1230 if (*dp != '\0') {
1231 ep = dp + strlen(dp) - 1;
1232 switch (lowerit(*ep)) {
1233 case 's': /* Standard */
1234 rp->r_todisstd = TRUE;
1235 rp->r_todisgmt = FALSE;
1236 *ep = '\0';
1237 break;
1238 case 'w': /* Wall */
1239 rp->r_todisstd = FALSE;
1240 rp->r_todisgmt = FALSE;
1241 *ep = '\0';
1242 break;
1243 case 'g': /* Greenwich */
1244 case 'u': /* Universal */
1245 case 'z': /* Zulu */
1246 rp->r_todisstd = TRUE;
1247 rp->r_todisgmt = TRUE;
1248 *ep = '\0';
1249 break;
1250 }
1251 }
1252 rp->r_tod = gethms(dp, _("invalid time of day"), FALSE);
1253 ifree(dp);
1254 /*
1255 ** Year work.
1256 */
1257 cp = loyearp;
1258 lp = byword(cp, begin_years);
1259 if (lp != NULL) switch ((int) lp->l_value) {
1260 case YR_MINIMUM:
1261 rp->r_loyear = INT_MIN;
1262 break;
1263 case YR_MAXIMUM:
1264 rp->r_loyear = INT_MAX;
1265 break;
1266 default: /* "cannot happen" */
1267 errx(EXIT_FAILURE,
1268 _("panic: invalid l_value %d"), lp->l_value);
1269 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_loyear) != 1) {
1270 error(_("invalid starting year"));
1271 return;
1272 } else if (noise) {
1273 if (rp->r_loyear < min_year_representable)
1274 warning(_("starting year too low to be represented"));
1275 else if (rp->r_loyear > max_year_representable)
1276 warning(_("starting year too high to be represented"));
1277 }
1278 cp = hiyearp;
1279 if ((lp = byword(cp, end_years)) != NULL) switch ((int) lp->l_value) {
1280 case YR_MINIMUM:
1281 rp->r_hiyear = INT_MIN;
1282 break;
1283 case YR_MAXIMUM:
1284 rp->r_hiyear = INT_MAX;
1285 break;
1286 case YR_ONLY:
1287 rp->r_hiyear = rp->r_loyear;
1288 break;
1289 default: /* "cannot happen" */
1290 errx(EXIT_FAILURE,
1291 _("panic: invalid l_value %d"), lp->l_value);
1292 } else if (sscanf(cp, scheck(cp, "%d"), &rp->r_hiyear) != 1) {
1293 error(_("invalid ending year"));
1294 return;
1295 } else if (noise) {
1296 if (rp->r_loyear < min_year_representable)
1297 warning(_("ending year too low to be represented"));
1298 else if (rp->r_loyear > max_year_representable)
1299 warning(_("ending year too high to be represented"));
1300 }
1301 if (rp->r_loyear > rp->r_hiyear) {
1302 error(_("starting year greater than ending year"));
1303 return;
1304 }
1305 if (*typep == '\0')
1306 rp->r_yrtype = NULL;
1307 else {
1308 if (rp->r_loyear == rp->r_hiyear) {
1309 error(_("typed single year"));
1310 return;
1311 }
1312 rp->r_yrtype = ecpyalloc(typep);
1313 }
1314 if (rp->r_loyear < min_year && rp->r_loyear > 0)
1315 min_year = rp->r_loyear;
1316 /*
1317 ** Day work.
1318 ** Accept things such as:
1319 ** 1
1320 ** last-Sunday
1321 ** Sun<=20
1322 ** Sun>=7
1323 */
1324 dp = ecpyalloc(dayp);
1325 if ((lp = byword(dp, lasts)) != NULL) {
1326 rp->r_dycode = DC_DOWLEQ;
1327 rp->r_wday = lp->l_value;
1328 rp->r_dayofmonth = len_months[1][rp->r_month];
1329 } else {
1330 if ((ep = strchr(dp, '<')) != 0)
1331 rp->r_dycode = DC_DOWLEQ;
1332 else if ((ep = strchr(dp, '>')) != 0)
1333 rp->r_dycode = DC_DOWGEQ;
1334 else {
1335 ep = dp;
1336 rp->r_dycode = DC_DOM;
1337 }
1338 if (rp->r_dycode != DC_DOM) {
1339 *ep++ = 0;
1340 if (*ep++ != '=') {
1341 error(_("invalid day of month"));
1342 ifree(dp);
1343 return;
1344 }
1345 if ((lp = byword(dp, wday_names)) == NULL) {
1346 error(_("invalid weekday name"));
1347 ifree(dp);
1348 return;
1349 }
1350 rp->r_wday = lp->l_value;
1351 }
1352 if (sscanf(ep, scheck(ep, "%d"), &rp->r_dayofmonth) != 1 ||
1353 rp->r_dayofmonth <= 0 ||
1354 (rp->r_dayofmonth > len_months[1][rp->r_month])) {
1355 error(_("invalid day of month"));
1356 ifree(dp);
1357 return;
1358 }
1359 }
1360 ifree(dp);
1361 }
1362
1363 static void
1364 convert(val, buf)
1365 const long val;
1366 char * const buf;
1367 {
1368 register int i;
1369 register long shift;
1370
1371 for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
1372 buf[i] = val >> shift;
1373 }
1374
1375 static void
1376 puttzcode(val, fp)
1377 const long val;
1378 FILE * const fp;
1379 {
1380 char buf[4];
1381
1382 convert(val, buf);
1383 (void) fwrite((void *) buf, (size_t) sizeof buf, (size_t) 1, fp);
1384 }
1385
1386 static int
1387 atcomp(avp, bvp)
1388 void * avp;
1389 void * bvp;
1390 {
1391 if (((struct attype *) avp)->at < ((struct attype *) bvp)->at)
1392 return -1;
1393 else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at)
1394 return 1;
1395 else return 0;
1396 }
1397
1398 static void
1399 writezone(name)
1400 const char * const name;
1401 {
1402 register FILE * fp;
1403 register int i, j;
1404 static char * fullname;
1405 static struct tzhead tzh;
1406 time_t ats[TZ_MAX_TIMES];
1407 unsigned char types[TZ_MAX_TIMES];
1408
1409 /*
1410 ** Sort.
1411 */
1412 if (timecnt > 1)
1413 (void) qsort((void *) attypes, (size_t) timecnt,
1414 (size_t) sizeof *attypes, atcomp);
1415 /*
1416 ** Optimize.
1417 */
1418 {
1419 int fromi;
1420 int toi;
1421
1422 toi = 0;
1423 fromi = 0;
1424 while (fromi < timecnt && attypes[fromi].at < min_time)
1425 ++fromi;
1426 if (isdsts[0] == 0)
1427 while (fromi < timecnt && attypes[fromi].type == 0)
1428 ++fromi; /* handled by default rule */
1429 for ( ; fromi < timecnt; ++fromi) {
1430 if (toi != 0
1431 && ((attypes[fromi].at
1432 + gmtoffs[attypes[toi - 1].type])
1433 <= (attypes[toi - 1].at
1434 + gmtoffs[toi == 1 ? 0
1435 : attypes[toi - 2].type]))) {
1436 attypes[toi - 1].type = attypes[fromi].type;
1437 continue;
1438 }
1439 if (toi == 0 ||
1440 attypes[toi - 1].type != attypes[fromi].type)
1441 attypes[toi++] = attypes[fromi];
1442 }
1443 timecnt = toi;
1444 }
1445 /*
1446 ** Transfer.
1447 */
1448 for (i = 0; i < timecnt; ++i) {
1449 ats[i] = attypes[i].at;
1450 types[i] = attypes[i].type;
1451 }
1452 fullname = erealloc(fullname,
1453 (int) (strlen(directory) + 1 + strlen(name) + 1));
1454 (void) sprintf(fullname, "%s/%s", directory, name);
1455
1456 /*
1457 * Remove old file, if any, to snap links.
1458 */
1459 if (!itsdir(fullname) && remove(fullname) != 0 && errno != ENOENT)
1460 err(EXIT_FAILURE, _("can't remove %s"), fullname);
1461
1462 if ((fp = fopen(fullname, "wb")) == NULL) {
1463 if (mkdirs(fullname) != 0)
1464 (void) exit(EXIT_FAILURE);
1465 if ((fp = fopen(fullname, "wb")) == NULL)
1466 err(EXIT_FAILURE, _("can't create %s"), fullname);
1467 }
1468 convert(eitol(typecnt), tzh.tzh_ttisgmtcnt);
1469 convert(eitol(typecnt), tzh.tzh_ttisstdcnt);
1470 convert(eitol(leapcnt), tzh.tzh_leapcnt);
1471 convert(eitol(timecnt), tzh.tzh_timecnt);
1472 convert(eitol(typecnt), tzh.tzh_typecnt);
1473 convert(eitol(charcnt), tzh.tzh_charcnt);
1474 (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
1475 #define DO(field) (void) fwrite((void *) tzh.field, (size_t) sizeof tzh.field, (size_t) 1, fp)
1476 DO(tzh_magic);
1477 DO(tzh_reserved);
1478 DO(tzh_ttisgmtcnt);
1479 DO(tzh_ttisstdcnt);
1480 DO(tzh_leapcnt);
1481 DO(tzh_timecnt);
1482 DO(tzh_typecnt);
1483 DO(tzh_charcnt);
1484 #undef DO
1485 for (i = 0; i < timecnt; ++i) {
1486 j = leapcnt;
1487 while (--j >= 0)
1488 if (ats[i] >= trans[j]) {
1489 ats[i] = tadd(ats[i], corr[j]);
1490 break;
1491 }
1492 puttzcode((long) ats[i], fp);
1493 }
1494 if (timecnt > 0)
1495 (void) fwrite((void *) types, (size_t) sizeof types[0],
1496 (size_t) timecnt, fp);
1497 for (i = 0; i < typecnt; ++i) {
1498 puttzcode((long) gmtoffs[i], fp);
1499 (void) putc(isdsts[i], fp);
1500 (void) putc(abbrinds[i], fp);
1501 }
1502 if (charcnt != 0)
1503 (void) fwrite((void *) chars, (size_t) sizeof chars[0],
1504 (size_t) charcnt, fp);
1505 for (i = 0; i < leapcnt; ++i) {
1506 if (roll[i]) {
1507 if (timecnt == 0 || trans[i] < ats[0]) {
1508 j = 0;
1509 while (isdsts[j])
1510 if (++j >= typecnt) {
1511 j = 0;
1512 break;
1513 }
1514 } else {
1515 j = 1;
1516 while (j < timecnt && trans[i] >= ats[j])
1517 ++j;
1518 j = types[j - 1];
1519 }
1520 puttzcode((long) tadd(trans[i], -gmtoffs[j]), fp);
1521 } else puttzcode((long) trans[i], fp);
1522 puttzcode((long) corr[i], fp);
1523 }
1524 for (i = 0; i < typecnt; ++i)
1525 (void) putc(ttisstds[i], fp);
1526 for (i = 0; i < typecnt; ++i)
1527 (void) putc(ttisgmts[i], fp);
1528 if (ferror(fp) || fclose(fp))
1529 errx(EXIT_FAILURE, _("error writing %s"), fullname);
1530 if (chmod(fullname, mflag) < 0)
1531 err(EXIT_FAILURE, _("cannot change mode of %s to %03o"),
1532 fullname, (unsigned)mflag);
1533 if ((uflag != (uid_t)-1 || gflag != (gid_t)-1)
1534 && chown(fullname, uflag, gflag) < 0)
1535 err(EXIT_FAILURE, _("cannot change ownership of %s"),
1536 fullname);
1537 }
1538
1539 static void
1540 doabbr(abbr, format, letters, isdst)
1541 char * const abbr;
1542 const char * const format;
1543 const char * const letters;
1544 const int isdst;
1545 {
1546 if (strchr(format, '/') == NULL) {
1547 if (letters == NULL)
1548 (void) strcpy(abbr, format);
1549 else (void) sprintf(abbr, format, letters);
1550 } else if (isdst)
1551 (void) strcpy(abbr, strchr(format, '/') + 1);
1552 else {
1553 (void) strcpy(abbr, format);
1554 *strchr(abbr, '/') = '\0';
1555 }
1556 }
1557
1558 static void
1559 outzone(zpfirst, zonecount)
1560 const struct zone * const zpfirst;
1561 const int zonecount;
1562 {
1563 register const struct zone * zp;
1564 register struct rule * rp;
1565 register int i, j;
1566 register int usestart, useuntil;
1567 register time_t starttime, untiltime;
1568 register long gmtoff;
1569 register long stdoff;
1570 register int year;
1571 register long startoff;
1572 register int startttisstd;
1573 register int startttisgmt;
1574 register int type;
1575 char startbuf[BUFSIZ];
1576
1577 INITIALIZE(untiltime);
1578 INITIALIZE(starttime);
1579 /*
1580 ** Now. . .finally. . .generate some useful data!
1581 */
1582 timecnt = 0;
1583 typecnt = 0;
1584 charcnt = 0;
1585 /*
1586 ** Thanks to Earl Chew (earl@dnd.icp.nec.com.au)
1587 ** for noting the need to unconditionally initialize startttisstd.
1588 */
1589 startttisstd = FALSE;
1590 startttisgmt = FALSE;
1591 for (i = 0; i < zonecount; ++i) {
1592 /*
1593 ** A guess that may well be corrected later.
1594 */
1595 stdoff = 0;
1596 zp = &zpfirst[i];
1597 usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
1598 useuntil = i < (zonecount - 1);
1599 if (useuntil && zp->z_untiltime <= min_time)
1600 continue;
1601 gmtoff = zp->z_gmtoff;
1602 eat(zp->z_filename, zp->z_linenum);
1603 *startbuf = '\0';
1604 startoff = zp->z_gmtoff;
1605 if (zp->z_nrules == 0) {
1606 stdoff = zp->z_stdoff;
1607 doabbr(startbuf, zp->z_format,
1608 (char *) NULL, stdoff != 0);
1609 type = addtype(oadd(zp->z_gmtoff, stdoff),
1610 startbuf, stdoff != 0, startttisstd,
1611 startttisgmt);
1612 if (usestart) {
1613 addtt(starttime, type);
1614 usestart = FALSE;
1615 } else if (stdoff != 0)
1616 addtt(min_time, type);
1617 } else for (year = min_year; year <= max_year; ++year) {
1618 if (useuntil && year > zp->z_untilrule.r_hiyear)
1619 break;
1620 /*
1621 ** Mark which rules to do in the current year.
1622 ** For those to do, calculate rpytime(rp, year);
1623 */
1624 for (j = 0; j < zp->z_nrules; ++j) {
1625 rp = &zp->z_rules[j];
1626 eats(zp->z_filename, zp->z_linenum,
1627 rp->r_filename, rp->r_linenum);
1628 rp->r_todo = year >= rp->r_loyear &&
1629 year <= rp->r_hiyear &&
1630 yearistype(year, rp->r_yrtype);
1631 if (rp->r_todo)
1632 rp->r_temp = rpytime(rp, year);
1633 }
1634 for ( ; ; ) {
1635 register int k;
1636 register time_t jtime, ktime;
1637 register long offset;
1638 char buf[BUFSIZ];
1639
1640 INITIALIZE(ktime);
1641 if (useuntil) {
1642 /*
1643 ** Turn untiltime into UTC
1644 ** assuming the current gmtoff and
1645 ** stdoff values.
1646 */
1647 untiltime = zp->z_untiltime;
1648 if (!zp->z_untilrule.r_todisgmt)
1649 untiltime = tadd(untiltime,
1650 -gmtoff);
1651 if (!zp->z_untilrule.r_todisstd)
1652 untiltime = tadd(untiltime,
1653 -stdoff);
1654 }
1655 /*
1656 ** Find the rule (of those to do, if any)
1657 ** that takes effect earliest in the year.
1658 */
1659 k = -1;
1660 for (j = 0; j < zp->z_nrules; ++j) {
1661 rp = &zp->z_rules[j];
1662 if (!rp->r_todo)
1663 continue;
1664 eats(zp->z_filename, zp->z_linenum,
1665 rp->r_filename, rp->r_linenum);
1666 offset = rp->r_todisgmt ? 0 : gmtoff;
1667 if (!rp->r_todisstd)
1668 offset = oadd(offset, stdoff);
1669 jtime = rp->r_temp;
1670 if (jtime == min_time ||
1671 jtime == max_time)
1672 continue;
1673 jtime = tadd(jtime, -offset);
1674 if (k < 0 || jtime < ktime) {
1675 k = j;
1676 ktime = jtime;
1677 }
1678 }
1679 if (k < 0)
1680 break; /* go on to next year */
1681 rp = &zp->z_rules[k];
1682 rp->r_todo = FALSE;
1683 if (useuntil && ktime >= untiltime)
1684 break;
1685 stdoff = rp->r_stdoff;
1686 if (usestart && ktime == starttime)
1687 usestart = FALSE;
1688 if (usestart) {
1689 if (ktime < starttime) {
1690 startoff = oadd(zp->z_gmtoff,
1691 stdoff);
1692 doabbr(startbuf, zp->z_format,
1693 rp->r_abbrvar,
1694 rp->r_stdoff != 0);
1695 continue;
1696 }
1697 if (*startbuf == '\0' &&
1698 startoff == oadd(zp->z_gmtoff,
1699 stdoff)) {
1700 doabbr(startbuf, zp->z_format,
1701 rp->r_abbrvar,
1702 rp->r_stdoff != 0);
1703 }
1704 }
1705 eats(zp->z_filename, zp->z_linenum,
1706 rp->r_filename, rp->r_linenum);
1707 doabbr(buf, zp->z_format, rp->r_abbrvar,
1708 rp->r_stdoff != 0);
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 }
1715 if (usestart) {
1716 if (*startbuf == '\0' &&
1717 zp->z_format != NULL &&
1718 strchr(zp->z_format, '%') == NULL &&
1719 strchr(zp->z_format, '/') == NULL)
1720 (void) strcpy(startbuf, zp->z_format);
1721 eat(zp->z_filename, zp->z_linenum);
1722 if (*startbuf == '\0')
1723 error(_("can't determine time zone abbreviation to use just after until time"));
1724 else addtt(starttime,
1725 addtype(startoff, startbuf,
1726 startoff != zp->z_gmtoff,
1727 startttisstd,
1728 startttisgmt));
1729 }
1730 /*
1731 ** Now we may get to set starttime for the next zone line.
1732 */
1733 if (useuntil) {
1734 startttisstd = zp->z_untilrule.r_todisstd;
1735 startttisgmt = zp->z_untilrule.r_todisgmt;
1736 starttime = zp->z_untiltime;
1737 if (!startttisstd)
1738 starttime = tadd(starttime, -stdoff);
1739 if (!startttisgmt)
1740 starttime = tadd(starttime, -gmtoff);
1741 }
1742 }
1743 writezone(zpfirst->z_name);
1744 }
1745
1746 static void
1747 addtt(starttime, type)
1748 const time_t starttime;
1749 int type;
1750 {
1751 if (starttime <= min_time ||
1752 (timecnt == 1 && attypes[0].at < min_time)) {
1753 gmtoffs[0] = gmtoffs[type];
1754 isdsts[0] = isdsts[type];
1755 ttisstds[0] = ttisstds[type];
1756 ttisgmts[0] = ttisgmts[type];
1757 if (abbrinds[type] != 0)
1758 (void) strcpy(chars, &chars[abbrinds[type]]);
1759 abbrinds[0] = 0;
1760 charcnt = strlen(chars) + 1;
1761 typecnt = 1;
1762 timecnt = 0;
1763 type = 0;
1764 }
1765 if (timecnt >= TZ_MAX_TIMES) {
1766 error(_("too many transitions?!"));
1767 (void) exit(EXIT_FAILURE);
1768 }
1769 attypes[timecnt].at = starttime;
1770 attypes[timecnt].type = type;
1771 ++timecnt;
1772 }
1773
1774 static int
1775 addtype(gmtoff, abbr, isdst, ttisstd, ttisgmt)
1776 const long gmtoff;
1777 const char * const abbr;
1778 const int isdst;
1779 const int ttisstd;
1780 const int ttisgmt;
1781 {
1782 register int i, j;
1783
1784 if (isdst != TRUE && isdst != FALSE) {
1785 error(_("internal error - addtype called with bad isdst"));
1786 (void) exit(EXIT_FAILURE);
1787 }
1788 if (ttisstd != TRUE && ttisstd != FALSE) {
1789 error(_("internal error - addtype called with bad ttisstd"));
1790 (void) exit(EXIT_FAILURE);
1791 }
1792 if (ttisgmt != TRUE && ttisgmt != FALSE) {
1793 error(_("internal error - addtype called with bad ttisgmt"));
1794 (void) exit(EXIT_FAILURE);
1795 }
1796 /*
1797 ** See if there's already an entry for this zone type.
1798 ** If so, just return its index.
1799 */
1800 for (i = 0; i < typecnt; ++i) {
1801 if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
1802 strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
1803 ttisstd == ttisstds[i] &&
1804 ttisgmt == ttisgmts[i])
1805 return i;
1806 }
1807 /*
1808 ** There isn't one; add a new one, unless there are already too
1809 ** many.
1810 */
1811 if (typecnt >= TZ_MAX_TYPES) {
1812 error(_("too many local time types"));
1813 (void) exit(EXIT_FAILURE);
1814 }
1815 gmtoffs[i] = gmtoff;
1816 isdsts[i] = isdst;
1817 ttisstds[i] = ttisstd;
1818 ttisgmts[i] = ttisgmt;
1819
1820 for (j = 0; j < charcnt; ++j)
1821 if (strcmp(&chars[j], abbr) == 0)
1822 break;
1823 if (j == charcnt)
1824 newabbr(abbr);
1825 abbrinds[i] = j;
1826 ++typecnt;
1827 return i;
1828 }
1829
1830 static void
1831 leapadd(t, positive, rolling, count)
1832 const time_t t;
1833 const int positive;
1834 const int rolling;
1835 int count;
1836 {
1837 register int i, j;
1838
1839 if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS) {
1840 error(_("too many leap seconds"));
1841 (void) exit(EXIT_FAILURE);
1842 }
1843 for (i = 0; i < leapcnt; ++i)
1844 if (t <= trans[i]) {
1845 if (t == trans[i]) {
1846 error(_("repeated leap second moment"));
1847 (void) exit(EXIT_FAILURE);
1848 }
1849 break;
1850 }
1851 do {
1852 for (j = leapcnt; j > i; --j) {
1853 trans[j] = trans[j - 1];
1854 corr[j] = corr[j - 1];
1855 roll[j] = roll[j - 1];
1856 }
1857 trans[i] = t;
1858 corr[i] = positive ? 1L : eitol(-count);
1859 roll[i] = rolling;
1860 ++leapcnt;
1861 } while (positive && --count != 0);
1862 }
1863
1864 static void
1865 adjleap P((void))
1866 {
1867 register int i;
1868 register long last = 0;
1869
1870 /*
1871 ** propagate leap seconds forward
1872 */
1873 for (i = 0; i < leapcnt; ++i) {
1874 trans[i] = tadd(trans[i], last);
1875 last = corr[i] += last;
1876 }
1877 }
1878
1879 static int
1880 yearistype(year, type)
1881 const int year;
1882 const char * const type;
1883 {
1884 static char * buf;
1885 int result;
1886
1887 if (type == NULL || *type == '\0')
1888 return TRUE;
1889 buf = erealloc(buf, (int) (132 + strlen(yitcommand) + strlen(type)));
1890 (void) sprintf(buf, "%s %d %s", yitcommand, year, type);
1891 result = system(buf);
1892 if (WIFEXITED(result)) switch (WEXITSTATUS(result)) {
1893 case 0:
1894 return TRUE;
1895 case 1:
1896 return FALSE;
1897 }
1898 error(_("wild result from command execution"));
1899 warnx(_("command was '%s', result was %d"), buf, result);
1900 for ( ; ; )
1901 (void) exit(EXIT_FAILURE);
1902 }
1903
1904 static int
1905 lowerit(a)
1906 int a;
1907 {
1908 a = (unsigned char) a;
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')
1932 do {
1933 if (*word == '\0')
1934 return FALSE;
1935 } while (lowerit(*word++) != lowerit(*abbr));
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 }
1965 return foundlp;
1966 }
1967
1968 static char **
1969 getfields(cp)
1970 register char * cp;
1971 {
1972 register char * dp;
1973 register char ** array;
1974 register int nsubs;
1975
1976 if (cp == NULL)
1977 return NULL;
1978 array = (char **) (void *)
1979 emalloc((int) ((strlen(cp) + 1) * sizeof *array));
1980 nsubs = 0;
1981 for ( ; ; ) {
1982 while (isascii(*cp) && isspace((unsigned char) *cp))
1983 ++cp;
1984 if (*cp == '\0' || *cp == '#')
1985 break;
1986 array[nsubs++] = dp = cp;
1987 do {
1988 if ((*dp = *cp++) != '"')
1989 ++dp;
1990 else while ((*dp = *cp++) != '"')
1991 if (*dp != '\0')
1992 ++dp;
1993 else error(_("odd number of quotation marks"));
1994 } while (*cp != '\0' && *cp != '#' &&
1995 (!isascii(*cp) || !isspace((unsigned char) *cp)));
1996 if (isascii(*cp) && isspace((unsigned char) *cp))
1997 ++cp;
1998 *dp = '\0';
1999 }
2000 array[nsubs] = NULL;
2001 return array;
2002 }
2003
2004 static long
2005 oadd(t1, t2)
2006 const long t1;
2007 const long t2;
2008 {
2009 register long t;
2010
2011 t = t1 + t2;
2012 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2013 error(_("time overflow"));
2014 (void) exit(EXIT_FAILURE);
2015 }
2016 return t;
2017 }
2018
2019 static time_t
2020 tadd(t1, t2)
2021 const time_t t1;
2022 const long t2;
2023 {
2024 register time_t t;
2025
2026 if (t1 == max_time && t2 > 0)
2027 return max_time;
2028 if (t1 == min_time && t2 < 0)
2029 return min_time;
2030 t = t1 + t2;
2031 if ((t2 > 0 && t <= t1) || (t2 < 0 && t >= t1)) {
2032 error(_("time overflow"));
2033 (void) exit(EXIT_FAILURE);
2034 }
2035 return t;
2036 }
2037
2038 /*
2039 ** Given a rule, and a year, compute the date - in seconds since January 1,
2040 ** 1970, 00:00 LOCAL time - in that year that the rule refers to.
2041 */
2042
2043 static time_t
2044 rpytime(rp, wantedy)
2045 register const struct rule * const rp;
2046 register const int wantedy;
2047 {
2048 register int y, m, i;
2049 register long dayoff; /* with a nod to Margaret O. */
2050 register time_t t;
2051
2052 if (wantedy == INT_MIN)
2053 return min_time;
2054 if (wantedy == INT_MAX)
2055 return max_time;
2056 dayoff = 0;
2057 m = TM_JANUARY;
2058 y = EPOCH_YEAR;
2059 while (wantedy != y) {
2060 if (wantedy > y) {
2061 i = len_years[isleap(y)];
2062 ++y;
2063 } else {
2064 --y;
2065 i = -len_years[isleap(y)];
2066 }
2067 dayoff = oadd(dayoff, eitol(i));
2068 }
2069 while (m != rp->r_month) {
2070 i = len_months[isleap(y)][m];
2071 dayoff = oadd(dayoff, eitol(i));
2072 ++m;
2073 }
2074 i = rp->r_dayofmonth;
2075 if (m == TM_FEBRUARY && i == 29 && !isleap(y)) {
2076 if (rp->r_dycode == DC_DOWLEQ)
2077 --i;
2078 else {
2079 error(_("use of 2/29 in non leap-year"));
2080 (void) exit(EXIT_FAILURE);
2081 }
2082 }
2083 --i;
2084 dayoff = oadd(dayoff, eitol(i));
2085 if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ) {
2086 register long wday;
2087
2088 #define LDAYSPERWEEK ((long) DAYSPERWEEK)
2089 wday = eitol(EPOCH_WDAY);
2090 /*
2091 ** Don't trust mod of negative numbers.
2092 */
2093 if (dayoff >= 0)
2094 wday = (wday + dayoff) % LDAYSPERWEEK;
2095 else {
2096 wday -= ((-dayoff) % LDAYSPERWEEK);
2097 if (wday < 0)
2098 wday += LDAYSPERWEEK;
2099 }
2100 while (wday != eitol(rp->r_wday))
2101 if (rp->r_dycode == DC_DOWGEQ) {
2102 dayoff = oadd(dayoff, (long) 1);
2103 if (++wday >= LDAYSPERWEEK)
2104 wday = 0;
2105 ++i;
2106 } else {
2107 dayoff = oadd(dayoff, (long) -1);
2108 if (--wday < 0)
2109 wday = LDAYSPERWEEK - 1;
2110 --i;
2111 }
2112 if (i < 0 || i >= len_months[isleap(y)][m]) {
2113 if (noise)
2114 warning(_("rule goes past start/end of month--will not work with pre-2004 versions of zic"));
2115 }
2116 }
2117 if (dayoff < 0 && !TYPE_SIGNED(time_t))
2118 return min_time;
2119 if (dayoff < min_time / SECSPERDAY)
2120 return min_time;
2121 if (dayoff > max_time / SECSPERDAY)
2122 return max_time;
2123 t = (time_t) dayoff * SECSPERDAY;
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) {
2135 error(_("too many, or too long, time zone abbreviations"));
2136 (void) exit(EXIT_FAILURE);
2137 }
2138 (void) strcpy(&chars[charcnt], string);
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' || Dflag)
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 */
2158 if (isalpha((unsigned char) name[0]) &&
2159 name[1] == ':' && name[2] == '\0') {
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.
2167 ** Creation may fail because of the directory being
2168 ** created by some other multiprocessor, so we get
2169 ** to do extra checking.
2170 */
2171 if (mkdir(name, MKDIR_UMASK) != 0
2172 && (errno != EEXIST || !itsdir(name))) {
2173 warn(_("can't create directory %s"), name);
2174 ifree(name);
2175 return -1;
2176 }
2177 }
2178 *cp = '/';
2179 }
2180 ifree(name);
2181 return 0;
2182 }
2183
2184 static long
2185 eitol(i)
2186 const int i;
2187 {
2188 long l;
2189
2190 l = i;
2191 if ((i < 0 && l >= 0) || (i == 0 && l != 0) || (i > 0 && l <= 0))
2192 errx(EXIT_FAILURE, _("%d did not sign extend correctly"), i);
2193 return l;
2194 }
2195
2196 #include <grp.h>
2197 #include <pwd.h>
2198
2199 static void
2200 setgroup(flag, name)
2201 gid_t *flag;
2202 const char *name;
2203 {
2204 struct group *gr;
2205
2206 if (*flag != (gid_t)-1)
2207 errx(EXIT_FAILURE, _("multiple -g flags specified"));
2208
2209 gr = getgrnam(name);
2210 if (gr == 0) {
2211 char *ep;
2212 unsigned long ul;
2213
2214 ul = strtoul(name, &ep, 10);
2215 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') {
2216 *flag = ul;
2217 return;
2218 }
2219 errx(EXIT_FAILURE, _("group `%s' not found"), name);
2220 }
2221 *flag = gr->gr_gid;
2222 }
2223
2224 static void
2225 setuser(flag, name)
2226 uid_t *flag;
2227 const char *name;
2228 {
2229 struct passwd *pw;
2230
2231 if (*flag != (gid_t)-1)
2232 errx(EXIT_FAILURE, _("multiple -u flags specified"));
2233
2234 pw = getpwnam(name);
2235 if (pw == 0) {
2236 char *ep;
2237 unsigned long ul;
2238
2239 ul = strtoul(name, &ep, 10);
2240 if (ul == (unsigned long)(gid_t)ul && *ep == '\0') {
2241 *flag = ul;
2242 return;
2243 }
2244 errx(EXIT_FAILURE, _("user `%s' not found"), name);
2245 }
2246 *flag = pw->pw_uid;
2247 }
2248
2249 /*
2250 ** UNIX was a registered trademark of The Open Group in 2003.
2251 */
mirror of system_cmds