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postgresql/src/timezone/zic.c

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/* Compile .zi time zone data into TZif binary files. */
/*
* This file is in the public domain, so clarified as of
* 2006-07-17 by Arthur David Olson.
*
* IDENTIFICATION
* src/timezone/zic.c
*/
#include "postgres_fe.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <time.h>
#include "pg_getopt.h"
#include "private.h"
#include "tzfile.h"
#define ZIC_VERSION_PRE_2013 '2'
#define ZIC_VERSION '3'
typedef int64 zic_t;
#define ZIC_MIN PG_INT64_MIN
#define ZIC_MAX PG_INT64_MAX
#ifndef ZIC_MAX_ABBR_LEN_WO_WARN
#define ZIC_MAX_ABBR_LEN_WO_WARN 6
#endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */
#ifndef WIN32
#ifdef S_IRUSR
#define MKDIR_UMASK (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
#else
#define MKDIR_UMASK 0755
#endif
#endif
#ifndef AT_SYMLINK_FOLLOW
#define linkat(fromdir, from, todir, to, flag) \
(itssymlink(from) ? (errno = ENOTSUP, -1) : link(from, to))
#endif
/* Port to native MS-Windows and to ancient UNIX. */
#if !defined S_ISDIR && defined S_IFDIR && defined S_IFMT
#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
#endif
/* The maximum ptrdiff_t value, for pre-C99 platforms. */
#ifndef PTRDIFF_MAX
static ptrdiff_t const PTRDIFF_MAX = MAXVAL(ptrdiff_t, TYPE_BIT(ptrdiff_t));
#endif
/*
* The type for line numbers. In Postgres, use %d to format them; upstream
* uses PRIdMAX but we prefer not to rely on that, not least because it
* results in platform-dependent strings to be translated.
*/
typedef int lineno_t;
struct rule
{
const char *r_filename;
lineno_t r_linenum;
const char *r_name;
zic_t r_loyear; /* for example, 1986 */
zic_t r_hiyear; /* for example, 1986 */
const char *r_yrtype;
bool r_lowasnum;
bool r_hiwasnum;
int r_month; /* 0..11 */
int r_dycode; /* see below */
int r_dayofmonth;
int r_wday;
zic_t r_tod; /* time from midnight */
bool r_todisstd; /* above is standard time if 1 or wall clock
* time if 0 */
bool r_todisgmt; /* above is GMT if 1 or local time if 0 */
bool r_isdst; /* is this daylight saving time? */
zic_t r_stdoff; /* offset from default time (which is usually
* standard time) */
const char *r_abbrvar; /* variable part of abbreviation */
bool r_todo; /* a rule to do (used in outzone) */
zic_t r_temp; /* used in outzone */
};
/*
* r_dycode r_dayofmonth r_wday
*/
#define DC_DOM 0 /* 1..31 */ /* unused */
#define DC_DOWGEQ 1 /* 1..31 */ /* 0..6 (Sun..Sat) */
#define DC_DOWLEQ 2 /* 1..31 */ /* 0..6 (Sun..Sat) */
struct zone
{
const char *z_filename;
lineno_t z_linenum;
const char *z_name;
zic_t z_gmtoff;
char *z_rule;
const char *z_format;
char z_format_specifier;
bool z_isdst;
zic_t z_stdoff;
struct rule *z_rules;
ptrdiff_t z_nrules;
struct rule z_untilrule;
zic_t z_untiltime;
};
extern int link(const char *fromname, const char *toname);
static void memory_exhausted(const char *msg) pg_attribute_noreturn();
static void verror(const char *string, va_list args) pg_attribute_printf(1, 0);
static void error(const char *string,...) pg_attribute_printf(1, 2);
static void warning(const char *string,...) pg_attribute_printf(1, 2);
static void usage(FILE *stream, int status) pg_attribute_noreturn();
static void addtt(zic_t starttime, int type);
static int addtype(zic_t, char const *, bool, bool, bool);
static void leapadd(zic_t, bool, int, int);
static void adjleap(void);
static void associate(void);
static void dolink(const char *, const char *, bool);
static char **getfields(char *buf);
static zic_t gethms(const char *string, const char *errstring);
static zic_t getstdoff(char *, bool *);
static void infile(const char *filename);
static void inleap(char **fields, int nfields);
static void inlink(char **fields, int nfields);
static void inrule(char **fields, int nfields);
static bool inzcont(char **fields, int nfields);
static bool inzone(char **fields, int nfields);
static bool inzsub(char **, int, bool);
static bool itsdir(char const *);
static bool itssymlink(char const *);
static bool is_alpha(char a);
static char lowerit(char);
static void mkdirs(char const *, bool);
static void newabbr(const char *abbr);
static zic_t oadd(zic_t t1, zic_t t2);
static void outzone(const struct zone *zp, ptrdiff_t ntzones);
static zic_t rpytime(const struct rule *rp, zic_t wantedy);
static void rulesub(struct rule *rp,
const char *loyearp, const char *hiyearp,
const char *typep, const char *monthp,
const char *dayp, const char *timep);
static zic_t tadd(zic_t t1, zic_t t2);
static bool yearistype(zic_t year, const char *type);
/* Bound on length of what %z can expand to. */
enum
{
PERCENT_Z_LEN_BOUND = sizeof "+995959" - 1};
/* If true, work around a bug in Qt 5.6.1 and earlier, which mishandles
TZif files whose POSIX-TZ-style strings contain '<'; see
QTBUG-53071 <https://bugreports.qt.io/browse/QTBUG-53071>. This
workaround will no longer be needed when Qt 5.6.1 and earlier are
obsolete, say in the year 2021. */
#ifndef WORK_AROUND_QTBUG_53071
enum
{
WORK_AROUND_QTBUG_53071 = true};
#endif
static int charcnt;
static bool errors;
static bool warnings;
static const char *filename;
static int leapcnt;
static bool leapseen;
static zic_t leapminyear;
static zic_t leapmaxyear;
static lineno_t linenum;
static int max_abbrvar_len = PERCENT_Z_LEN_BOUND;
static int max_format_len;
static zic_t max_year;
static zic_t min_year;
static bool noise;
static bool print_abbrevs;
static zic_t print_cutoff;
static const char *rfilename;
static lineno_t rlinenum;
static const char *progname;
static ptrdiff_t timecnt;
static ptrdiff_t timecnt_alloc;
static int typecnt;
/*
* Line codes.
*/
#define LC_RULE 0
#define LC_ZONE 1
#define LC_LINK 2
#define LC_LEAP 3
/*
* Which fields are which on a Zone line.
*/
#define ZF_NAME 1
#define ZF_GMTOFF 2
#define ZF_RULE 3
#define ZF_FORMAT 4
#define ZF_TILYEAR 5
#define ZF_TILMONTH 6
#define ZF_TILDAY 7
#define ZF_TILTIME 8
#define ZONE_MINFIELDS 5
#define ZONE_MAXFIELDS 9
/*
* Which fields are which on a Zone continuation line.
*/
#define ZFC_GMTOFF 0
#define ZFC_RULE 1
#define ZFC_FORMAT 2
#define ZFC_TILYEAR 3
#define ZFC_TILMONTH 4
#define ZFC_TILDAY 5
#define ZFC_TILTIME 6
#define ZONEC_MINFIELDS 3
#define ZONEC_MAXFIELDS 7
/*
* Which files are which on a Rule line.
*/
#define RF_NAME 1
#define RF_LOYEAR 2
#define RF_HIYEAR 3
#define RF_COMMAND 4
#define RF_MONTH 5
#define RF_DAY 6
#define RF_TOD 7
#define RF_STDOFF 8
#define RF_ABBRVAR 9
#define RULE_FIELDS 10
/*
* Which fields are which on a Link line.
*/
#define LF_FROM 1
#define LF_TO 2
#define LINK_FIELDS 3
/*
* Which fields are which on a Leap line.
*/
#define LP_YEAR 1
#define LP_MONTH 2
#define LP_DAY 3
#define LP_TIME 4
#define LP_CORR 5
#define LP_ROLL 6
#define LEAP_FIELDS 7
/*
* Year synonyms.
*/
#define YR_MINIMUM 0
#define YR_MAXIMUM 1
#define YR_ONLY 2
static struct rule *rules;
static ptrdiff_t nrules; /* number of rules */
static ptrdiff_t nrules_alloc;
static struct zone *zones;
static ptrdiff_t nzones; /* number of zones */
static ptrdiff_t nzones_alloc;
struct link
{
const char *l_filename;
lineno_t l_linenum;
const char *l_from;
const char *l_to;
};
static struct link *links;
static ptrdiff_t nlinks;
static ptrdiff_t nlinks_alloc;
struct lookup
{
const char *l_word;
const int l_value;
};
static struct lookup const *byword(const char *string,
const struct lookup *lp);
static struct lookup const zi_line_codes[] = {
{"Rule", LC_RULE},
{"Zone", LC_ZONE},
{"Link", LC_LINK},
{NULL, 0}
};
static struct lookup const leap_line_codes[] = {
{"Leap", LC_LEAP},
{NULL, 0}
};
static struct lookup const mon_names[] = {
{"January", TM_JANUARY},
{"February", TM_FEBRUARY},
{"March", TM_MARCH},
{"April", TM_APRIL},
{"May", TM_MAY},
{"June", TM_JUNE},
{"July", TM_JULY},
{"August", TM_AUGUST},
{"September", TM_SEPTEMBER},
{"October", TM_OCTOBER},
{"November", TM_NOVEMBER},
{"December", TM_DECEMBER},
{NULL, 0}
};
static struct lookup const wday_names[] = {
{"Sunday", TM_SUNDAY},
{"Monday", TM_MONDAY},
{"Tuesday", TM_TUESDAY},
{"Wednesday", TM_WEDNESDAY},
{"Thursday", TM_THURSDAY},
{"Friday", TM_FRIDAY},
{"Saturday", TM_SATURDAY},
{NULL, 0}
};
static struct lookup const lasts[] = {
{"last-Sunday", TM_SUNDAY},
{"last-Monday", TM_MONDAY},
{"last-Tuesday", TM_TUESDAY},
{"last-Wednesday", TM_WEDNESDAY},
{"last-Thursday", TM_THURSDAY},
{"last-Friday", TM_FRIDAY},
{"last-Saturday", TM_SATURDAY},
{NULL, 0}
};
static struct lookup const begin_years[] = {
{"minimum", YR_MINIMUM},
{"maximum", YR_MAXIMUM},
{NULL, 0}
};
static struct lookup const end_years[] = {
{"minimum", YR_MINIMUM},
{"maximum", YR_MAXIMUM},
{"only", YR_ONLY},
{NULL, 0}
};
static struct lookup const leap_types[] = {
{"Rolling", true},
{"Stationary", false},
{NULL, 0}
};
static const int len_months[2][MONSPERYEAR] = {
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};
static const int len_years[2] = {
DAYSPERNYEAR, DAYSPERLYEAR
};
static struct attype
{
zic_t at;
bool dontmerge;
unsigned char type;
} *attypes;
static zic_t gmtoffs[TZ_MAX_TYPES];
static char isdsts[TZ_MAX_TYPES];
static unsigned char abbrinds[TZ_MAX_TYPES];
static bool ttisstds[TZ_MAX_TYPES];
static bool ttisgmts[TZ_MAX_TYPES];
static char chars[TZ_MAX_CHARS];
static zic_t trans[TZ_MAX_LEAPS];
static zic_t corr[TZ_MAX_LEAPS];
static char roll[TZ_MAX_LEAPS];
/*
* Memory allocation.
*/
static void
memory_exhausted(const char *msg)
{
fprintf(stderr, _("%s: Memory exhausted: %s\n"), progname, msg);
exit(EXIT_FAILURE);
}
static size_t
size_product(size_t nitems, size_t itemsize)
{
if (SIZE_MAX / itemsize < nitems)
memory_exhausted(_("size overflow"));
return nitems * itemsize;
}
static void *
memcheck(void *ptr)
{
if (ptr == NULL)
memory_exhausted(strerror(errno));
return ptr;
}
static void *
emalloc(size_t size)
{
return memcheck(malloc(size));
}
static void *
erealloc(void *ptr, size_t size)
{
return memcheck(realloc(ptr, size));
}
static char *
ecpyalloc(char const *str)
{
return memcheck(strdup(str));
}
static void *
growalloc(void *ptr, size_t itemsize, ptrdiff_t nitems, ptrdiff_t *nitems_alloc)
{
if (nitems < *nitems_alloc)
return ptr;
else
{
ptrdiff_t nitems_max = PTRDIFF_MAX - WORK_AROUND_QTBUG_53071;
ptrdiff_t amax = nitems_max < SIZE_MAX ? nitems_max : SIZE_MAX;
if ((amax - 1) / 3 * 2 < *nitems_alloc)
memory_exhausted(_("integer overflow"));
*nitems_alloc += (*nitems_alloc >> 1) + 1;
return erealloc(ptr, size_product(*nitems_alloc, itemsize));
}
}
/*
* Error handling.
*/
static void
eats(char const *name, lineno_t num, char const *rname, lineno_t rnum)
{
filename = name;
linenum = num;
rfilename = rname;
rlinenum = rnum;
}
static void
eat(char const *name, lineno_t num)
{
eats(name, num, NULL, -1);
}
static void
verror(const char *string, va_list args)
{
/*
* Match the format of "cc" to allow sh users to zic ... 2>&1 | error -t
* "*" -v on BSD systems.
*/
if (filename)
fprintf(stderr, _("\"%s\", line %d: "), filename, linenum);
vfprintf(stderr, string, args);
if (rfilename != NULL)
fprintf(stderr, _(" (rule from \"%s\", line %d)"),
rfilename, rlinenum);
fprintf(stderr, "\n");
}
static void
error(const char *string,...)
{
va_list args;
va_start(args, string);
verror(string, args);
va_end(args);
errors = true;
}
static void
warning(const char *string,...)
{
va_list args;
fprintf(stderr, _("warning: "));
va_start(args, string);
verror(string, args);
va_end(args);
warnings = true;
}
static void
close_file(FILE *stream, char const *dir, char const *name)
{
char const *e = (ferror(stream) ? _("I/O error")
: fclose(stream) != 0 ? strerror(errno) : NULL);
if (e)
{
fprintf(stderr, "%s: %s%s%s%s%s\n", progname,
dir ? dir : "", dir ? "/" : "",
name ? name : "", name ? ": " : "",
e);
exit(EXIT_FAILURE);
}
}
static void
usage(FILE *stream, int status)
{
fprintf(stream,
_("%s: usage is %s [ --version ] [ --help ] [ -v ] [ -P ] \\\n"
"\t[ -l localtime ] [ -p posixrules ] [ -d directory ] \\\n"
"\t[ -t localtime-link ] [ -L leapseconds ] [ -r '[@lo][/@hi]' ] \\\n"
"\t[ filename ... ]\n\n"
"Report bugs to %s.\n"),
progname, progname, PACKAGE_BUGREPORT);
if (status == EXIT_SUCCESS)
close_file(stream, NULL, NULL);
exit(status);
}
/* Change the working directory to DIR, possibly creating DIR and its
ancestors. After this is done, all files are accessed with names
relative to DIR. */
static void
change_directory(char const *dir)
{
if (chdir(dir) != 0)
{
int chdir_errno = errno;
if (chdir_errno == ENOENT)
{
mkdirs(dir, false);
chdir_errno = chdir(dir) == 0 ? 0 : errno;
}
if (chdir_errno != 0)
{
fprintf(stderr, _("%s: Can't chdir to %s: %s\n"),
progname, dir, strerror(chdir_errno));
exit(EXIT_FAILURE);
}
}
}
#define TIME_T_BITS_IN_FILE 64
/* The minimum and maximum values representable in a TZif file. */
static zic_t const min_time = MINVAL(zic_t, TIME_T_BITS_IN_FILE);
static zic_t const max_time = MAXVAL(zic_t, TIME_T_BITS_IN_FILE);
/* The minimum, and one less than the maximum, values specified by
the -r option. These default to MIN_TIME and MAX_TIME. */
static zic_t lo_time = MINVAL(zic_t, TIME_T_BITS_IN_FILE);
static zic_t hi_time = MAXVAL(zic_t, TIME_T_BITS_IN_FILE);
/* Set the time range of the output to TIMERANGE.
Return true if successful. */
static bool
timerange_option(char *timerange)
{
int64 lo = min_time,
hi = max_time;
char *lo_end = timerange,
*hi_end;
if (*timerange == '@')
{
errno = 0;
lo = strtoimax(timerange + 1, &lo_end, 10);
if (lo_end == timerange + 1 || (lo == PG_INT64_MAX && errno == ERANGE))
return false;
}
hi_end = lo_end;
if (lo_end[0] == '/' && lo_end[1] == '@')
{
errno = 0;
hi = strtoimax(lo_end + 2, &hi_end, 10);
if (hi_end == lo_end + 2 || hi == PG_INT64_MIN)
return false;
hi -= !(hi == PG_INT64_MAX && errno == ERANGE);
}
if (*hi_end || hi < lo || max_time < lo || hi < min_time)
return false;
lo_time = lo < min_time ? min_time : lo;
hi_time = max_time < hi ? max_time : hi;
return true;
}
static const char *psxrules;
static const char *lcltime;
static const char *directory;
static const char *leapsec;
static const char *tzdefault;
static const char *yitcommand;
int
main(int argc, char **argv)
{
int c,
k;
ptrdiff_t i,
j;
bool timerange_given = false;
#ifndef WIN32
umask(umask(S_IWGRP | S_IWOTH) | (S_IWGRP | S_IWOTH));
#endif
progname = argv[0];
if (TYPE_BIT(zic_t) <64)
{
fprintf(stderr, "%s: %s\n", progname,
_("wild compilation-time specification of zic_t"));
return EXIT_FAILURE;
}
for (k = 1; k < argc; k++)
if (strcmp(argv[k], "--version") == 0)
{
printf("zic %s\n", PG_VERSION);
close_file(stdout, NULL, NULL);
return EXIT_SUCCESS;
}
else if (strcmp(argv[k], "--help") == 0)
{
usage(stdout, EXIT_SUCCESS);
}
while ((c = getopt(argc, argv, "d:l:L:p:Pr:st:vy:")) != EOF && c != -1)
switch (c)
{
default:
usage(stderr, EXIT_FAILURE);
case 'd':
if (directory == NULL)
directory = strdup(optarg);
else
{
fprintf(stderr,
_("%s: More than one -d option specified\n"),
progname);
return EXIT_FAILURE;
}
break;
case 'l':
if (lcltime == NULL)
lcltime = strdup(optarg);
else
{
fprintf(stderr,
_("%s: More than one -l option specified\n"),
progname);
return EXIT_FAILURE;
}
break;
case 'p':
if (psxrules == NULL)
psxrules = strdup(optarg);
else
{
fprintf(stderr,
_("%s: More than one -p option specified\n"),
progname);
return EXIT_FAILURE;
}
break;
case 't':
if (tzdefault != NULL)
{
fprintf(stderr,
_("%s: More than one -t option"
" specified\n"),
progname);
return EXIT_FAILURE;
}
tzdefault = optarg;
break;
case 'y':
if (yitcommand == NULL)
{
warning(_("-y is obsolescent"));
yitcommand = strdup(optarg);
}
else
{
fprintf(stderr,
_("%s: More than one -y option specified\n"),
progname);
return EXIT_FAILURE;
}
break;
case 'L':
if (leapsec == NULL)
leapsec = strdup(optarg);
else
{
fprintf(stderr,
_("%s: More than one -L option specified\n"),
progname);
return EXIT_FAILURE;
}
break;
case 'v':
noise = true;
break;
case 'P':
print_abbrevs = true;
print_cutoff = time(NULL);
break;
case 'r':
if (timerange_given)
{
fprintf(stderr,
_("%s: More than one -r option specified\n"),
progname);
return EXIT_FAILURE;
}
if (!timerange_option(optarg))
{
fprintf(stderr,
_("%s: invalid time range: %s\n"),
progname, optarg);
return EXIT_FAILURE;
}
timerange_given = true;
break;
case 's':
warning(_("-s ignored"));
break;
}
if (optind == argc - 1 && strcmp(argv[optind], "=") == 0)
usage(stderr, EXIT_FAILURE); /* usage message by request */
if (directory == NULL)
directory = "data";
if (tzdefault == NULL)
tzdefault = TZDEFAULT;
if (yitcommand == NULL)
yitcommand = "yearistype";
if (optind < argc && leapsec != NULL)
{
infile(leapsec);
adjleap();
}
for (k = optind; k < argc; k++)
infile(argv[k]);
if (errors)
return EXIT_FAILURE;
associate();
change_directory(directory);
for (i = 0; i < nzones; i = j)
{
/*
* Find the next non-continuation zone entry.
*/
for (j = i + 1; j < nzones && zones[j].z_name == NULL; ++j)
continue;
outzone(&zones[i], j - i);
}
/*
* Make links.
*/
for (i = 0; i < nlinks; ++i)
{
eat(links[i].l_filename, links[i].l_linenum);
dolink(links[i].l_from, links[i].l_to, false);
if (noise)
for (j = 0; j < nlinks; ++j)
if (strcmp(links[i].l_to,
links[j].l_from) == 0)
warning(_("link to link"));
}
if (lcltime != NULL)
{
eat(_("command line"), 1);
dolink(lcltime, tzdefault, true);
}
if (psxrules != NULL)
{
eat(_("command line"), 1);
dolink(psxrules, TZDEFRULES, true);
}
if (warnings && (ferror(stderr) || fclose(stderr) != 0))
return EXIT_FAILURE;
return errors ? EXIT_FAILURE : EXIT_SUCCESS;
}
static bool
componentcheck(char const *name, char const *component,
char const *component_end)
{
enum
{
component_len_max = 14};
ptrdiff_t component_len = component_end - component;
if (component_len == 0)
{
if (!*name)
error(_("empty file name"));
else
error(_(component == name
? "file name '%s' begins with '/'"
: *component_end
? "file name '%s' contains '//'"
: "file name '%s' ends with '/'"),
name);
return false;
}
if (0 < component_len && component_len <= 2
&& component[0] == '.' && component_end[-1] == '.')
{
int len = component_len;
error(_("file name '%s' contains '%.*s' component"),
name, len, component);
return false;
}
if (noise)
{
if (0 < component_len && component[0] == '-')
warning(_("file name '%s' component contains leading '-'"),
name);
if (component_len_max < component_len)
warning(_("file name '%s' contains overlength component"
" '%.*s...'"),
name, component_len_max, component);
}
return true;
}
static bool
namecheck(const char *name)
{
char const *cp;
/* Benign characters in a portable file name. */
static char const benign[] =
"-/_"
"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
/*
* Non-control chars in the POSIX portable character set, excluding the
* benign characters.
*/
static char const printable_and_not_benign[] =
" !\"#$%&'()*+,.0123456789:;<=>?@[\\]^`{|}~";
char const *component = name;
for (cp = name; *cp; cp++)
{
unsigned char c = *cp;
if (noise && !strchr(benign, c))
{
warning((strchr(printable_and_not_benign, c)
? _("file name '%s' contains byte '%c'")
: _("file name '%s' contains byte '\\%o'")),
name, c);
}
if (c == '/')
{
if (!componentcheck(name, component, cp))
return false;
component = cp + 1;
}
}
return componentcheck(name, component, cp);
}
/*
* Create symlink contents suitable for symlinking FROM to TO, as a
* freshly allocated string. FROM should be a relative file name, and
* is relative to the global variable DIRECTORY. TO can be either
* relative or absolute.
*/
#ifdef HAVE_SYMLINK
static char *
relname(char const *from, char const *to)
{
size_t i,
taillen,
dotdotetcsize;
size_t dir_len = 0,
dotdots = 0,
linksize = SIZE_MAX;
char const *f = from;
char *result = NULL;
if (*to == '/')
{
/* Make F absolute too. */
size_t len = strlen(directory);
bool needslash = len && directory[len - 1] != '/';
linksize = len + needslash + strlen(from) + 1;
f = result = emalloc(linksize);
strcpy(result, directory);
result[len] = '/';
strcpy(result + len + needslash, from);
}
for (i = 0; f[i] && f[i] == to[i]; i++)
if (f[i] == '/')
dir_len = i + 1;
for (; to[i]; i++)
dotdots += to[i] == '/' && to[i - 1] != '/';
taillen = strlen(f + dir_len);
dotdotetcsize = 3 * dotdots + taillen + 1;
if (dotdotetcsize <= linksize)
{
if (!result)
result = emalloc(dotdotetcsize);
for (i = 0; i < dotdots; i++)
memcpy(result + 3 * i, "../", 3);
memmove(result + 3 * dotdots, f + dir_len, taillen + 1);
}
return result;
}
#endif /* HAVE_SYMLINK */
/* Hard link FROM to TO, following any symbolic links.
Return 0 if successful, an error number otherwise. */
static int
hardlinkerr(char const *from, char const *to)
{
int r = linkat(AT_FDCWD, from, AT_FDCWD, to, AT_SYMLINK_FOLLOW);
return r == 0 ? 0 : errno;
}
static void
dolink(char const *fromfield, char const *tofield, bool staysymlink)
{
bool todirs_made = false;
int link_errno;
/*
* We get to be careful here since there's a fair chance of root running
* us.
*/
if (itsdir(fromfield))
{
fprintf(stderr, _("%s: link from %s/%s failed: %s\n"),
progname, directory, fromfield, strerror(EPERM));
exit(EXIT_FAILURE);
}
if (staysymlink)
staysymlink = itssymlink(tofield);
if (remove(tofield) == 0)
todirs_made = true;
else if (errno != ENOENT)
{
char const *e = strerror(errno);
fprintf(stderr, _("%s: Can't remove %s/%s: %s\n"),
progname, directory, tofield, e);
exit(EXIT_FAILURE);
}
link_errno = staysymlink ? ENOTSUP : hardlinkerr(fromfield, tofield);
if (link_errno == ENOENT && !todirs_made)
{
mkdirs(tofield, true);
todirs_made = true;
link_errno = hardlinkerr(fromfield, tofield);
}
if (link_errno != 0)
{
#ifdef HAVE_SYMLINK
bool absolute = *fromfield == '/';
char *linkalloc = absolute ? NULL : relname(fromfield, tofield);
char const *contents = absolute ? fromfield : linkalloc;
int symlink_errno = symlink(contents, tofield) == 0 ? 0 : errno;
if (!todirs_made
&& (symlink_errno == ENOENT || symlink_errno == ENOTSUP))
{
mkdirs(tofield, true);
if (symlink_errno == ENOENT)
symlink_errno = symlink(contents, tofield) == 0 ? 0 : errno;
}
free(linkalloc);
if (symlink_errno == 0)
{
if (link_errno != ENOTSUP)
warning(_("symbolic link used because hard link failed: %s"),
strerror(link_errno));
}
else
#endif /* HAVE_SYMLINK */
{
FILE *fp,
*tp;
int c;
fp = fopen(fromfield, "rb");
if (!fp)
{
char const *e = strerror(errno);
fprintf(stderr, _("%s: Can't read %s/%s: %s\n"),
progname, directory, fromfield, e);
exit(EXIT_FAILURE);
}
tp = fopen(tofield, "wb");
if (!tp)
{
char const *e = strerror(errno);
fprintf(stderr, _("%s: Can't create %s/%s: %s\n"),
progname, directory, tofield, e);
exit(EXIT_FAILURE);
}
while ((c = getc(fp)) != EOF)
putc(c, tp);
close_file(fp, directory, fromfield);
close_file(tp, directory, tofield);
if (link_errno != ENOTSUP)
warning(_("copy used because hard link failed: %s"),
strerror(link_errno));
#ifdef HAVE_SYMLINK
else if (symlink_errno != ENOTSUP)
warning(_("copy used because symbolic link failed: %s"),
strerror(symlink_errno));
#endif
}
}
}
/* Return true if NAME is a directory. */
static bool
itsdir(char const *name)
{
struct stat st;
int res = stat(name, &st);
#ifdef S_ISDIR
if (res == 0)
return S_ISDIR(st.st_mode) != 0;
#endif
if (res == 0 || errno == EOVERFLOW)
{
size_t n = strlen(name);
char *nameslashdot = emalloc(n + 3);
bool dir;
memcpy(nameslashdot, name, n);
strcpy(&nameslashdot[n], &"/."[!(n && name[n - 1] != '/')]);
dir = stat(nameslashdot, &st) == 0 || errno == EOVERFLOW;
free(nameslashdot);
return dir;
}
return false;
}
/* Return true if NAME is a symbolic link. */
static bool
itssymlink(char const *name)
{
#ifdef HAVE_SYMLINK
char c;
return 0 <= readlink(name, &c, 1);
#else
return false;
#endif
}
/*
* Associate sets of rules with zones.
*/
/*
* Sort by rule name.
*/
static int
rcomp(const void *cp1, const void *cp2)
{
return strcmp(((const struct rule *) cp1)->r_name,
((const struct rule *) cp2)->r_name);
}
static void
associate(void)
{
struct zone *zp;
struct rule *rp;
ptrdiff_t i,
j,
base,
out;
if (nrules != 0)
{
qsort(rules, nrules, sizeof *rules, rcomp);
for (i = 0; i < nrules - 1; ++i)
{
if (strcmp(rules[i].r_name,
rules[i + 1].r_name) != 0)
continue;
if (strcmp(rules[i].r_filename,
rules[i + 1].r_filename) == 0)
continue;
eat(rules[i].r_filename, rules[i].r_linenum);
warning(_("same rule name in multiple files"));
eat(rules[i + 1].r_filename, rules[i + 1].r_linenum);
warning(_("same rule name in multiple files"));
for (j = i + 2; j < nrules; ++j)
{
if (strcmp(rules[i].r_name,
rules[j].r_name) != 0)
break;
if (strcmp(rules[i].r_filename,
rules[j].r_filename) == 0)
continue;
if (strcmp(rules[i + 1].r_filename,
rules[j].r_filename) == 0)
continue;
break;
}
i = j - 1;
}
}
for (i = 0; i < nzones; ++i)
{
zp = &zones[i];
zp->z_rules = NULL;
zp->z_nrules = 0;
}
for (base = 0; base < nrules; base = out)
{
rp = &rules[base];
for (out = base + 1; out < nrules; ++out)
if (strcmp(rp->r_name, rules[out].r_name) != 0)
break;
for (i = 0; i < nzones; ++i)
{
zp = &zones[i];
if (strcmp(zp->z_rule, rp->r_name) != 0)
continue;
zp->z_rules = rp;
zp->z_nrules = out - base;
}
}
for (i = 0; i < nzones; ++i)
{
zp = &zones[i];
if (zp->z_nrules == 0)
{
/*
* Maybe we have a local standard time offset.
*/
eat(zp->z_filename, zp->z_linenum);
zp->z_stdoff = getstdoff(zp->z_rule, &zp->z_isdst);
/*
* Note, though, that if there's no rule, a '%s' in the format is
* a bad thing.
*/
if (zp->z_format_specifier == 's')
error("%s", _("%s in ruleless zone"));
}
}
if (errors)
exit(EXIT_FAILURE);
}
static void
infile(const char *name)
{
FILE *fp;
char **fields;
char *cp;
const struct lookup *lp;
int nfields;
bool wantcont;
lineno_t num;
char buf[BUFSIZ];
if (strcmp(name, "-") == 0)
{
name = _("standard input");
fp = stdin;
}
else if ((fp = fopen(name, "r")) == NULL)
{
const char *e = strerror(errno);
fprintf(stderr, _("%s: Cannot open %s: %s\n"),
progname, name, e);
exit(EXIT_FAILURE);
}
wantcont = false;
for (num = 1;; ++num)
{
eat(name, num);
if (fgets(buf, sizeof buf, fp) != buf)
break;
cp = strchr(buf, '\n');
if (cp == NULL)
{
error(_("line too long"));
exit(EXIT_FAILURE);
}
*cp = '\0';
fields = getfields(buf);
nfields = 0;
while (fields[nfields] != NULL)
{
static char nada;
if (strcmp(fields[nfields], "-") == 0)
fields[nfields] = &nada;
++nfields;
}
if (nfields == 0)
{
/* nothing to do */
}
else if (wantcont)
{
wantcont = inzcont(fields, nfields);
}
else
{
struct lookup const *line_codes
= name == leapsec ? leap_line_codes : zi_line_codes;
lp = byword(fields[0], line_codes);
if (lp == NULL)
error(_("input line of unknown type"));
else
switch (lp->l_value)
{
case LC_RULE:
inrule(fields, nfields);
wantcont = false;
break;
case LC_ZONE:
wantcont = inzone(fields, nfields);
break;
case LC_LINK:
inlink(fields, nfields);
wantcont = false;
break;
case LC_LEAP:
inleap(fields, nfields);
wantcont = false;
break;
default: /* "cannot happen" */
fprintf(stderr,
_("%s: panic: Invalid l_value %d\n"),
progname, lp->l_value);
exit(EXIT_FAILURE);
}
}
free(fields);
}
close_file(fp, NULL, filename);
if (wantcont)
error(_("expected continuation line not found"));
}
/*
* Convert a string of one of the forms
* h -h hh:mm -hh:mm hh:mm:ss -hh:mm:ss
* into a number of seconds.
* A null string maps to zero.
* Call error with errstring and return zero on errors.
*/
static zic_t
gethms(char const *string, char const *errstring)
{
/* PG: make hh be int not zic_t to avoid sscanf portability issues */
int hh;
int sign,
mm = 0,
ss = 0;
char hhx,
mmx,
ssx,
xr = '0',
xs;
int tenths = 0;
bool ok = true;
if (string == NULL || *string == '\0')
return 0;
if (*string == '-')
{
sign = -1;
++string;
}
else
sign = 1;
switch (sscanf(string,
"%d%c%d%c%d%c%1d%*[0]%c%*[0123456789]%c",
&hh, &hhx, &mm, &mmx, &ss, &ssx, &tenths, &xr, &xs))
{
default:
ok = false;
break;
case 8:
ok = '0' <= xr && xr <= '9';
/* fallthrough */
case 7:
ok &= ssx == '.';
if (ok && noise)
warning(_("fractional seconds rejected by"
" pre-2018 versions of zic"));
/* fallthrough */
case 5:
ok &= mmx == ':';
/* fallthrough */
case 3:
ok &= hhx == ':';
/* fallthrough */
case 1:
break;
}
if (!ok)
{
error("%s", errstring);
return 0;
}
if (hh < 0 ||
mm < 0 || mm >= MINSPERHOUR ||
ss < 0 || ss > SECSPERMIN)
{
error("%s", errstring);
return 0;
}
/* Some compilers warn that this test is unsatisfiable for 32-bit ints */
#if INT_MAX > PG_INT32_MAX
if (ZIC_MAX / SECSPERHOUR < hh)
{
error(_("time overflow"));
return 0;
}
#endif
ss += 5 + ((ss ^ 1) & (xr == '0')) <= tenths; /* Round to even. */
if (noise && (hh > HOURSPERDAY ||
(hh == HOURSPERDAY && (mm != 0 || ss != 0))))
warning(_("values over 24 hours not handled by pre-2007 versions of zic"));
return oadd(sign * (zic_t) hh * SECSPERHOUR,
sign * (mm * SECSPERMIN + ss));
}
static zic_t
getstdoff(char *field, bool *isdst)
{
int dst = -1;
zic_t stdoff;
size_t fieldlen = strlen(field);
if (fieldlen != 0)
{
char *ep = field + fieldlen - 1;
switch (*ep)
{
case 'd':
dst = 1;
*ep = '\0';
break;
case 's':
dst = 0;
*ep = '\0';
break;
}
}
stdoff = gethms(field, _("invalid saved time"));
*isdst = dst < 0 ? stdoff != 0 : dst;
return stdoff;
}
static void
inrule(char **fields, int nfields)
{
static struct rule r;
if (nfields != RULE_FIELDS)
{
error(_("wrong number of fields on Rule line"));
return;
}
switch (*fields[RF_NAME])
{
case '\0':
case ' ':
case '\f':
case '\n':
case '\r':
case '\t':
case '\v':
case '+':
case '-':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
error(_("Invalid rule name \"%s\""), fields[RF_NAME]);
return;
}
r.r_filename = filename;
r.r_linenum = linenum;
r.r_stdoff = getstdoff(fields[RF_STDOFF], &r.r_isdst);
rulesub(&r, fields[RF_LOYEAR], fields[RF_HIYEAR], fields[RF_COMMAND],
fields[RF_MONTH], fields[RF_DAY], fields[RF_TOD]);
r.r_name = ecpyalloc(fields[RF_NAME]);
r.r_abbrvar = ecpyalloc(fields[RF_ABBRVAR]);
if (max_abbrvar_len < strlen(r.r_abbrvar))
max_abbrvar_len = strlen(r.r_abbrvar);
rules = growalloc(rules, sizeof *rules, nrules, &nrules_alloc);
rules[nrules++] = r;
}
static bool
inzone(char **fields, int nfields)
{
ptrdiff_t i;
if (nfields < ZONE_MINFIELDS || nfields > ZONE_MAXFIELDS)
{
error(_("wrong number of fields on Zone line"));
return false;
}
if (lcltime != NULL && strcmp(fields[ZF_NAME], tzdefault) == 0)
{
error(
_("\"Zone %s\" line and -l option are mutually exclusive"),
tzdefault);
return false;
}
if (strcmp(fields[ZF_NAME], TZDEFRULES) == 0 && psxrules != NULL)
{
error(
_("\"Zone %s\" line and -p option are mutually exclusive"),
TZDEFRULES);
return false;
}
for (i = 0; i < nzones; ++i)
if (zones[i].z_name != NULL &&
strcmp(zones[i].z_name, fields[ZF_NAME]) == 0)
{
error(_("duplicate zone name %s"
" (file \"%s\", line %d)"),
fields[ZF_NAME],
zones[i].z_filename,
zones[i].z_linenum);
return false;
}
return inzsub(fields, nfields, false);
}
static bool
inzcont(char **fields, int nfields)
{
if (nfields < ZONEC_MINFIELDS || nfields > ZONEC_MAXFIELDS)
{
error(_("wrong number of fields on Zone continuation line"));
return false;
}
return inzsub(fields, nfields, true);
}
static bool
inzsub(char **fields, int nfields, bool iscont)
{
char *cp;
char *cp1;
static struct zone z;
int i_gmtoff,
i_rule,
i_format;
int i_untilyear,
i_untilmonth;
int i_untilday,
i_untiltime;
bool hasuntil;
if (iscont)
{
i_gmtoff = ZFC_GMTOFF;
i_rule = ZFC_RULE;
i_format = ZFC_FORMAT;
i_untilyear = ZFC_TILYEAR;
i_untilmonth = ZFC_TILMONTH;
i_untilday = ZFC_TILDAY;
i_untiltime = ZFC_TILTIME;
z.z_name = NULL;
}
else if (!namecheck(fields[ZF_NAME]))
return false;
else
{
i_gmtoff = ZF_GMTOFF;
i_rule = ZF_RULE;
i_format = ZF_FORMAT;
i_untilyear = ZF_TILYEAR;
i_untilmonth = ZF_TILMONTH;
i_untilday = ZF_TILDAY;
i_untiltime = ZF_TILTIME;
z.z_name = ecpyalloc(fields[ZF_NAME]);
}
z.z_filename = filename;
z.z_linenum = linenum;
z.z_gmtoff = gethms(fields[i_gmtoff], _("invalid UT offset"));
if ((cp = strchr(fields[i_format], '%')) != NULL)
{
if ((*++cp != 's' && *cp != 'z') || strchr(cp, '%')
|| strchr(fields[i_format], '/'))
{
error(_("invalid abbreviation format"));
return false;
}
}
z.z_rule = ecpyalloc(fields[i_rule]);
z.z_format = cp1 = ecpyalloc(fields[i_format]);
z.z_format_specifier = cp ? *cp : '\0';
if (z.z_format_specifier == 'z')
{
if (noise)
warning(_("format '%s' not handled by pre-2015 versions of zic"),
z.z_format);
cp1[cp - fields[i_format]] = 's';
}
if (max_format_len < strlen(z.z_format))
max_format_len = strlen(z.z_format);
hasuntil = nfields > i_untilyear;
if (hasuntil)
{
z.z_untilrule.r_filename = filename;
z.z_untilrule.r_linenum = linenum;
rulesub(&z.z_untilrule,
fields[i_untilyear],
"only",
"",
(nfields > i_untilmonth) ?
fields[i_untilmonth] : "Jan",
(nfields > i_untilday) ? fields[i_untilday] : "1",
(nfields > i_untiltime) ? fields[i_untiltime] : "0");
z.z_untiltime = rpytime(&z.z_untilrule,
z.z_untilrule.r_loyear);
if (iscont && nzones > 0 &&
z.z_untiltime > min_time &&
z.z_untiltime < max_time &&
zones[nzones - 1].z_untiltime > min_time &&
zones[nzones - 1].z_untiltime < max_time &&
zones[nzones - 1].z_untiltime >= z.z_untiltime)
{
error(_("Zone continuation line end time is not after end time of previous line"));
return false;
}
}
zones = growalloc(zones, sizeof *zones, nzones, &nzones_alloc);
zones[nzones++] = z;
/*
* If there was an UNTIL field on this line, there's more information
* about the zone on the next line.
*/
return hasuntil;
}
static void
inleap(char **fields, int nfields)
{
const char *cp;
const struct lookup *lp;
zic_t i,
j;
/* PG: make year be int not zic_t to avoid sscanf portability issues */
int year;
int month,
day;
zic_t dayoff,
tod;
zic_t t;
char xs;
if (nfields != LEAP_FIELDS)
{
error(_("wrong number of fields on Leap line"));
return;
}
dayoff = 0;
cp = fields[LP_YEAR];
if (sscanf(cp, "%d%c", &year, &xs) != 1)
{
/*
* Leapin' Lizards!
*/
error(_("invalid leaping year"));
return;
}
if (!leapseen || leapmaxyear < year)
leapmaxyear = year;
if (!leapseen || leapminyear > year)
leapminyear = year;
leapseen = true;
j = EPOCH_YEAR;
while (j != year)
{
if (year > j)
{
i = len_years[isleap(j)];
++j;
}
else
{
--j;
i = -len_years[isleap(j)];
}
dayoff = oadd(dayoff, i);
}
if ((lp = byword(fields[LP_MONTH], mon_names)) == NULL)
{
error(_("invalid month name"));
return;
}
month = lp->l_value;
j = TM_JANUARY;
while (j != month)
{
i = len_months[isleap(year)][j];
dayoff = oadd(dayoff, i);
++j;
}
cp = fields[LP_DAY];
if (sscanf(cp, "%d%c", &day, &xs) != 1 ||
day <= 0 || day > len_months[isleap(year)][month])
{
error(_("invalid day of month"));
return;
}
dayoff = oadd(dayoff, day - 1);
if (dayoff < min_time / SECSPERDAY)
{
error(_("time too small"));
return;
}
if (dayoff > max_time / SECSPERDAY)
{
error(_("time too large"));
return;
}
t = dayoff * SECSPERDAY;
tod = gethms(fields[LP_TIME], _("invalid time of day"));
cp = fields[LP_CORR];
{
bool positive;
int count;
if (strcmp(cp, "") == 0)
{ /* infile() turns "-" into "" */
positive = false;
count = 1;
}
else if (strcmp(cp, "+") == 0)
{
positive = true;
count = 1;
}
else
{
error(_("illegal CORRECTION field on Leap line"));
return;
}
if ((lp = byword(fields[LP_ROLL], leap_types)) == NULL)
{
error(_("illegal Rolling/Stationary field on Leap line"));
return;
}
t = tadd(t, tod);
if (t < 0)
{
error(_("leap second precedes Epoch"));
return;
}
leapadd(t, positive, lp->l_value, count);
}
}
static void
inlink(char **fields, int nfields)
{
struct link l;
if (nfields != LINK_FIELDS)
{
error(_("wrong number of fields on Link line"));
return;
}
if (*fields[LF_FROM] == '\0')
{
error(_("blank FROM field on Link line"));
return;
}
if (!namecheck(fields[LF_TO]))
return;
l.l_filename = filename;
l.l_linenum = linenum;
l.l_from = ecpyalloc(fields[LF_FROM]);
l.l_to = ecpyalloc(fields[LF_TO]);
links = growalloc(links, sizeof *links, nlinks, &nlinks_alloc);
links[nlinks++] = l;
}
static void
rulesub(struct rule *rp, const char *loyearp, const char *hiyearp,
const char *typep, const char *monthp, const char *dayp,
const char *timep)
{
const struct lookup *lp;
const char *cp;
char *dp;
char *ep;
char xs;
/* PG: year_tmp is to avoid sscanf portability issues */
int year_tmp;
if ((lp = byword(monthp, mon_names)) == NULL)
{
error(_("invalid month name"));
return;
}
rp->r_month = lp->l_value;
rp->r_todisstd = false;
rp->r_todisgmt = false;
dp = ecpyalloc(timep);
if (*dp != '\0')
{
ep = dp + strlen(dp) - 1;
switch (lowerit(*ep))
{
case 's': /* Standard */
rp->r_todisstd = true;
rp->r_todisgmt = false;
*ep = '\0';
break;
case 'w': /* Wall */
rp->r_todisstd = false;
rp->r_todisgmt = false;
*ep = '\0';
break;
case 'g': /* Greenwich */
case 'u': /* Universal */
case 'z': /* Zulu */
rp->r_todisstd = true;
rp->r_todisgmt = true;
*ep = '\0';
break;
}
}
rp->r_tod = gethms(dp, _("invalid time of day"));
free(dp);
/*
* Year work.
*/
cp = loyearp;
lp = byword(cp, begin_years);
rp->r_lowasnum = lp == NULL;
if (!rp->r_lowasnum)
switch (lp->l_value)
{
case YR_MINIMUM:
rp->r_loyear = ZIC_MIN;
break;
case YR_MAXIMUM:
rp->r_loyear = ZIC_MAX;
break;
default: /* "cannot happen" */
fprintf(stderr,
_("%s: panic: Invalid l_value %d\n"),
progname, lp->l_value);
exit(EXIT_FAILURE);
}
else if (sscanf(cp, "%d%c", &year_tmp, &xs) == 1)
rp->r_loyear = year_tmp;
else
{
error(_("invalid starting year"));
return;
}
cp = hiyearp;
lp = byword(cp, end_years);
rp->r_hiwasnum = lp == NULL;
if (!rp->r_hiwasnum)
switch (lp->l_value)
{
case YR_MINIMUM:
rp->r_hiyear = ZIC_MIN;
break;
case YR_MAXIMUM:
rp->r_hiyear = ZIC_MAX;
break;
case YR_ONLY:
rp->r_hiyear = rp->r_loyear;
break;
default: /* "cannot happen" */
fprintf(stderr,
_("%s: panic: Invalid l_value %d\n"),
progname, lp->l_value);
exit(EXIT_FAILURE);
}
else if (sscanf(cp, "%d%c", &year_tmp, &xs) == 1)
rp->r_hiyear = year_tmp;
else
{
error(_("invalid ending year"));
return;
}
if (rp->r_loyear > rp->r_hiyear)
{
error(_("starting year greater than ending year"));
return;
}
if (*typep == '\0')
rp->r_yrtype = NULL;
else
{
if (rp->r_loyear == rp->r_hiyear)
{
error(_("typed single year"));
return;
}
warning(_("year type \"%s\" is obsolete; use \"-\" instead"),
typep);
rp->r_yrtype = ecpyalloc(typep);
}
/*
* Day work. Accept things such as: 1 lastSunday last-Sunday
* (undocumented; warn about this) Sun<=20 Sun>=7
*/
dp = ecpyalloc(dayp);
if ((lp = byword(dp, lasts)) != NULL)
{
rp->r_dycode = DC_DOWLEQ;
rp->r_wday = lp->l_value;
rp->r_dayofmonth = len_months[1][rp->r_month];
}
else
{
if ((ep = strchr(dp, '<')) != NULL)
rp->r_dycode = DC_DOWLEQ;
else if ((ep = strchr(dp, '>')) != NULL)
rp->r_dycode = DC_DOWGEQ;
else
{
ep = dp;
rp->r_dycode = DC_DOM;
}
if (rp->r_dycode != DC_DOM)
{
*ep++ = 0;
if (*ep++ != '=')
{
error(_("invalid day of month"));
free(dp);
return;
}
if ((lp = byword(dp, wday_names)) == NULL)
{
error(_("invalid weekday name"));
free(dp);
return;
}
rp->r_wday = lp->l_value;
}
if (sscanf(ep, "%d%c", &rp->r_dayofmonth, &xs) != 1 ||
rp->r_dayofmonth <= 0 ||
(rp->r_dayofmonth > len_months[1][rp->r_month]))
{
error(_("invalid day of month"));
free(dp);
return;
}
}
free(dp);
}
static void
convert(const int32 val, char *const buf)
{
int i;
int shift;
unsigned char *const b = (unsigned char *) buf;
for (i = 0, shift = 24; i < 4; ++i, shift -= 8)
b[i] = val >> shift;
}
static void
convert64(const zic_t val, char *const buf)
{
int i;
int shift;
unsigned char *const b = (unsigned char *) buf;
for (i = 0, shift = 56; i < 8; ++i, shift -= 8)
b[i] = val >> shift;
}
static void
puttzcode(const int32 val, FILE *const fp)
{
char buf[4];
convert(val, buf);
fwrite(buf, sizeof buf, 1, fp);
}
static void
puttzcodepass(zic_t val, FILE *fp, int pass)
{
if (pass == 1)
puttzcode(val, fp);
else
{
char buf[8];
convert64(val, buf);
fwrite(buf, sizeof buf, 1, fp);
}
}
static int
atcomp(const void *avp, const void *bvp)
{
const zic_t a = ((const struct attype *) avp)->at;
const zic_t b = ((const struct attype *) bvp)->at;
return (a < b) ? -1 : (a > b);
}
static void
swaptypes(int i, int j)
{
{
zic_t t = gmtoffs[i];
gmtoffs[i] = gmtoffs[j];
gmtoffs[j] = t;
}
{
char t = isdsts[i];
isdsts[i] = isdsts[j];
isdsts[j] = t;
}
{
unsigned char t = abbrinds[i];
abbrinds[i] = abbrinds[j];
abbrinds[j] = t;
}
{
bool t = ttisstds[i];
ttisstds[i] = ttisstds[j];
ttisstds[j] = t;
}
{
bool t = ttisgmts[i];
ttisgmts[i] = ttisgmts[j];
ttisgmts[j] = t;
}
}
struct timerange
{
int defaulttype;
ptrdiff_t base,
count;
int leapbase,
leapcount;
};
static struct timerange
limitrange(struct timerange r, zic_t lo, zic_t hi,
zic_t const *ats, unsigned char const *types)
{
while (0 < r.count && ats[r.base] < lo)
{
r.defaulttype = types[r.base];
r.count--;
r.base++;
}
while (0 < r.leapcount && trans[r.leapbase] < lo)
{
r.leapcount--;
r.leapbase++;
}
if (hi < ZIC_MAX)
{
while (0 < r.count && hi + 1 < ats[r.base + r.count - 1])
r.count--;
while (0 < r.leapcount && hi + 1 < trans[r.leapbase + r.leapcount - 1])
r.leapcount--;
}
return r;
}
static void
writezone(const char *const name, const char *const string, char version,
int defaulttype)
{
FILE *fp;
ptrdiff_t i,
j;
int pass;
static const struct tzhead tzh0;
static struct tzhead tzh;
bool dir_checked = false;
zic_t one = 1;
zic_t y2038_boundary = one << 31;
ptrdiff_t nats = timecnt + WORK_AROUND_QTBUG_53071;
/*
* Allocate the ATS and TYPES arrays via a single malloc, as this is a bit
* faster.
*/
zic_t *ats = emalloc(MAXALIGN(size_product(nats, sizeof *ats + 1)));
void *typesptr = ats + nats;
unsigned char *types = typesptr;
struct timerange rangeall,
range32,
range64;
/*
* Sort.
*/
if (timecnt > 1)
qsort(attypes, timecnt, sizeof *attypes, atcomp);
/*
* Optimize.
*/
{
ptrdiff_t fromi,
toi;
toi = 0;
fromi = 0;
for (; fromi < timecnt; ++fromi)
{
if (toi != 0 && ((attypes[fromi].at +
gmtoffs[attypes[toi - 1].type]) <=
(attypes[toi - 1].at + gmtoffs[toi == 1 ? 0
: attypes[toi - 2].type])))
{
attypes[toi - 1].type =
attypes[fromi].type;
continue;
}
if (toi == 0
|| attypes[fromi].dontmerge
|| attypes[toi - 1].type != attypes[fromi].type)
attypes[toi++] = attypes[fromi];
}
timecnt = toi;
}
if (noise && timecnt > 1200)
{
if (timecnt > TZ_MAX_TIMES)
warning(_("reference clients mishandle"
" more than %d transition times"),
TZ_MAX_TIMES);
else
warning(_("pre-2014 clients may mishandle"
" more than 1200 transition times"));
}
/*
* Transfer.
*/
for (i = 0; i < timecnt; ++i)
{
ats[i] = attypes[i].at;
types[i] = attypes[i].type;
}
/*
* Correct for leap seconds.
*/
for (i = 0; i < timecnt; ++i)
{
j = leapcnt;
while (--j >= 0)
if (ats[i] > trans[j] - corr[j])
{
ats[i] = tadd(ats[i], corr[j]);
break;
}
}
/*
* Work around QTBUG-53071 for timestamps less than y2038_boundary - 1, by
* inserting a no-op transition at time y2038_boundary - 1. This works
* only for timestamps before the boundary, which should be good enough in
* practice as QTBUG-53071 should be long-dead by 2038. Do this after
* correcting for leap seconds, as the idea is to insert a transition just
* before 32-bit pg_time_t rolls around, and this occurs at a slightly
* different moment if transitions are leap-second corrected.
*/
if (WORK_AROUND_QTBUG_53071 && timecnt != 0
&& ats[timecnt - 1] < y2038_boundary - 1 && strchr(string, '<'))
{
ats[timecnt] = y2038_boundary - 1;
types[timecnt] = types[timecnt - 1];
timecnt++;
}
rangeall.defaulttype = defaulttype;
rangeall.base = rangeall.leapbase = 0;
rangeall.count = timecnt;
rangeall.leapcount = leapcnt;
range64 = limitrange(rangeall, lo_time, hi_time, ats, types);
range32 = limitrange(range64, PG_INT32_MIN, PG_INT32_MAX, ats, types);
/*
* Remove old file, if any, to snap links.
*/
if (remove(name) == 0)
dir_checked = true;
else if (errno != ENOENT)
{
const char *e = strerror(errno);
fprintf(stderr, _("%s: Cannot remove %s/%s: %s\n"),
progname, directory, name, e);
exit(EXIT_FAILURE);
}
fp = fopen(name, "wb");
if (!fp)
{
int fopen_errno = errno;
if (fopen_errno == ENOENT && !dir_checked)
{
mkdirs(name, true);
fp = fopen(name, "wb");
fopen_errno = errno;
}
if (!fp)
{
fprintf(stderr, _("%s: Cannot create %s/%s: %s\n"),
progname, directory, name, strerror(fopen_errno));
exit(EXIT_FAILURE);
}
}
for (pass = 1; pass <= 2; ++pass)
{
ptrdiff_t thistimei,
thistimecnt,
thistimelim;
int thisleapi,
thisleapcnt,
thisleaplim;
int currenttype,
thisdefaulttype;
bool locut,
hicut;
zic_t lo;
int old0;
char omittype[TZ_MAX_TYPES];
int typemap[TZ_MAX_TYPES];
int thistypecnt;
char thischars[TZ_MAX_CHARS];
int thischarcnt;
bool toomanytimes;
int indmap[TZ_MAX_CHARS];
if (pass == 1)
{
/*
* Arguably the default time type in the 32-bit data should be
* range32.defaulttype, which is suited for timestamps just before
* PG_INT32_MIN. However, zic traditionally used the time type of
* the indefinite past instead. Internet RFC 8532 says readers
* should ignore 32-bit data, so this discrepancy matters only to
* obsolete readers where the traditional type might be more
* appropriate even if it's "wrong". So, use the historical zic
* value, unless -r specifies a low cutoff that excludes some
* 32-bit timestamps.
*/
thisdefaulttype = (lo_time <= PG_INT32_MIN
? range64.defaulttype
: range32.defaulttype);
thistimei = range32.base;
thistimecnt = range32.count;
toomanytimes = thistimecnt >> 31 >> 1 != 0;
thisleapi = range32.leapbase;
thisleapcnt = range32.leapcount;
locut = PG_INT32_MIN < lo_time;
hicut = hi_time < PG_INT32_MAX;
}
else
{
thisdefaulttype = range64.defaulttype;
thistimei = range64.base;
thistimecnt = range64.count;
toomanytimes = thistimecnt >> 31 >> 31 >> 2 != 0;
thisleapi = range64.leapbase;
thisleapcnt = range64.leapcount;
locut = min_time < lo_time;
hicut = hi_time < max_time;
}
if (toomanytimes)
error(_("too many transition times"));
/*
* Keep the last too-low transition if no transition is exactly at LO.
* The kept transition will be output as a LO "transition"; see
* "Output a LO_TIME transition" below. This is needed when the
* output is truncated at the start, and is also useful when catering
* to buggy 32-bit clients that do not use time type 0 for timestamps
* before the first transition.
*/
if (0 < thistimei && ats[thistimei] != lo_time)
{
thistimei--;
thistimecnt++;
locut = false;
}
thistimelim = thistimei + thistimecnt;
thisleaplim = thisleapi + thisleapcnt;
if (thistimecnt != 0)
{
if (ats[thistimei] == lo_time)
locut = false;
if (hi_time < ZIC_MAX && ats[thistimelim - 1] == hi_time + 1)
hicut = false;
}
memset(omittype, true, typecnt);
omittype[thisdefaulttype] = false;
for (i = thistimei; i < thistimelim; i++)
omittype[types[i]] = false;
/*
* Reorder types to make THISDEFAULTTYPE type 0. Use TYPEMAP to swap
* OLD0 and THISDEFAULTTYPE so that THISDEFAULTTYPE appears as type 0
* in the output instead of OLD0. TYPEMAP also omits unused types.
*/
old0 = strlen(omittype);
swaptypes(old0, thisdefaulttype);
#ifndef LEAVE_SOME_PRE_2011_SYSTEMS_IN_THE_LURCH
/*
* For some pre-2011 systems: if the last-to-be-written standard (or
* daylight) type has an offset different from the most recently used
* offset, append an (unused) copy of the most recently used type (to
* help get global "altzone" and "timezone" variables set correctly).
*/
{
int mrudst,
mrustd,
hidst,
histd,
type;
hidst = histd = mrudst = mrustd = -1;
for (i = thistimei; i < thistimelim; ++i)
if (isdsts[types[i]])
mrudst = types[i];
else
mrustd = types[i];
for (i = old0; i < typecnt; i++)
if (!omittype[i])
{
if (isdsts[i])
hidst = i;
else
histd = i;
}
if (hidst >= 0 && mrudst >= 0 && hidst != mrudst &&
gmtoffs[hidst] != gmtoffs[mrudst])
{
isdsts[mrudst] = -1;
type = addtype(gmtoffs[mrudst],
&chars[abbrinds[mrudst]],
true,
ttisstds[mrudst],
ttisgmts[mrudst]);
isdsts[mrudst] = 1;
omittype[type] = false;
}
if (histd >= 0 && mrustd >= 0 && histd != mrustd &&
gmtoffs[histd] != gmtoffs[mrustd])
{
isdsts[mrustd] = -1;
type = addtype(gmtoffs[mrustd],
&chars[abbrinds[mrustd]],
false,
ttisstds[mrustd],
ttisgmts[mrustd]);
isdsts[mrustd] = 0;
omittype[type] = false;
}
}
#endif /* !defined
* LEAVE_SOME_PRE_2011_SYSTEMS_IN_THE_LURCH */
thistypecnt = 0;
for (i = old0; i < typecnt; i++)
if (!omittype[i])
typemap[i == old0 ? thisdefaulttype
: i == thisdefaulttype ? old0 : i]
= thistypecnt++;
for (i = 0; i < sizeof indmap / sizeof indmap[0]; ++i)
indmap[i] = -1;
thischarcnt = 0;
for (i = old0; i < typecnt; i++)
{
char *thisabbr;
if (omittype[i])
continue;
if (indmap[abbrinds[i]] >= 0)
continue;
thisabbr = &chars[abbrinds[i]];
for (j = 0; j < thischarcnt; ++j)
if (strcmp(&thischars[j], thisabbr) == 0)
break;
if (j == thischarcnt)
{
strcpy(&thischars[thischarcnt], thisabbr);
thischarcnt += strlen(thisabbr) + 1;
}
indmap[abbrinds[i]] = j;
}
#define DO(field) fwrite(tzh.field, sizeof tzh.field, 1, fp)
tzh = tzh0;
memcpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);
tzh.tzh_version[0] = version;
convert(thistypecnt, tzh.tzh_ttisgmtcnt);
convert(thistypecnt, tzh.tzh_ttisstdcnt);
convert(thisleapcnt, tzh.tzh_leapcnt);
convert(locut + thistimecnt + hicut, tzh.tzh_timecnt);
convert(thistypecnt, tzh.tzh_typecnt);
convert(thischarcnt, tzh.tzh_charcnt);
DO(tzh_magic);
DO(tzh_version);
DO(tzh_reserved);
DO(tzh_ttisgmtcnt);
DO(tzh_ttisstdcnt);
DO(tzh_leapcnt);
DO(tzh_timecnt);
DO(tzh_typecnt);
DO(tzh_charcnt);
#undef DO
/* PG: print current timezone abbreviations if requested */
if (print_abbrevs && pass == 2)
{
/* Print "type" data for periods ending after print_cutoff */
for (i = thistimei; i < thistimelim; ++i)
{
if (i == thistimelim - 1 || ats[i + 1] > print_cutoff)
{
unsigned char tm = types[i];
char *thisabbrev = &thischars[indmap[abbrinds[tm]]];
/* filter out assorted junk entries */
if (strcmp(thisabbrev, GRANDPARENTED) != 0 &&
strcmp(thisabbrev, "zzz") != 0)
fprintf(stdout, "%s\t" INT64_FORMAT "%s\n",
thisabbrev,
gmtoffs[tm],
isdsts[tm] ? "\tD" : "");
}
}
/* Print the default type if we have no transitions at all */
if (thistimei >= thistimelim)
{
unsigned char tm = defaulttype;
char *thisabbrev = &thischars[indmap[abbrinds[tm]]];
/* filter out assorted junk entries */
if (strcmp(thisabbrev, GRANDPARENTED) != 0 &&
strcmp(thisabbrev, "zzz") != 0)
fprintf(stdout, "%s\t" INT64_FORMAT "%s\n",
thisabbrev,
gmtoffs[tm],
isdsts[tm] ? "\tD" : "");
}
}
/*
* Output a LO_TIME transition if needed; see limitrange. But do not
* go below the minimum representable value for this pass.
*/
lo = pass == 1 && lo_time < PG_INT32_MIN ? PG_INT32_MIN : lo_time;
if (locut)
puttzcodepass(lo, fp, pass);
for (i = thistimei; i < thistimelim; ++i)
{
zic_t at = ats[i] < lo ? lo : ats[i];
puttzcodepass(at, fp, pass);
}
if (hicut)
puttzcodepass(hi_time + 1, fp, pass);
currenttype = 0;
if (locut)
putc(currenttype, fp);
for (i = thistimei; i < thistimelim; ++i)
{
currenttype = typemap[types[i]];
putc(currenttype, fp);
}
if (hicut)
putc(currenttype, fp);
for (i = old0; i < typecnt; i++)
if (!omittype[i])
{
puttzcode(gmtoffs[i], fp);
putc(isdsts[i], fp);
putc((unsigned char) indmap[abbrinds[i]], fp);
}
if (thischarcnt != 0)
fwrite(thischars, sizeof thischars[0],
thischarcnt, fp);
for (i = thisleapi; i < thisleaplim; ++i)
{
zic_t todo;
if (roll[i])
{
if (timecnt == 0 || trans[i] < ats[0])
{
j = 0;
while (isdsts[j])
if (++j >= typecnt)
{
j = 0;
break;
}
}
else
{
j = 1;
while (j < timecnt &&
trans[i] >= ats[j])
++j;
j = types[j - 1];
}
todo = tadd(trans[i], -gmtoffs[j]);
}
else
todo = trans[i];
puttzcodepass(todo, fp, pass);
puttzcode(corr[i], fp);
}
for (i = old0; i < typecnt; i++)
if (!omittype[i])
putc(ttisstds[i], fp);
for (i = old0; i < typecnt; i++)
if (!omittype[i])
putc(ttisgmts[i], fp);
swaptypes(old0, thisdefaulttype);
}
fprintf(fp, "\n%s\n", string);
close_file(fp, directory, name);
free(ats);
}
static char const *
abbroffset(char *buf, zic_t offset)
{
char sign = '+';
int seconds,
minutes;
if (offset < 0)
{
offset = -offset;
sign = '-';
}
seconds = offset % SECSPERMIN;
offset /= SECSPERMIN;
minutes = offset % MINSPERHOUR;
offset /= MINSPERHOUR;
if (100 <= offset)
{
error(_("%%z UT offset magnitude exceeds 99:59:59"));
return "%z";
}
else
{
char *p = buf;
*p++ = sign;
*p++ = '0' + offset / 10;
*p++ = '0' + offset % 10;
if (minutes | seconds)
{
*p++ = '0' + minutes / 10;
*p++ = '0' + minutes % 10;
if (seconds)
{
*p++ = '0' + seconds / 10;
*p++ = '0' + seconds % 10;
}
}
*p = '\0';
return buf;
}
}
static size_t
doabbr(char *abbr, struct zone const *zp, char const *letters,
bool isdst, zic_t stdoff, bool doquotes)
{
char *cp;
char *slashp;
size_t len;
char const *format = zp->z_format;
slashp = strchr(format, '/');
if (slashp == NULL)
{
char letterbuf[PERCENT_Z_LEN_BOUND + 1];
if (zp->z_format_specifier == 'z')
letters = abbroffset(letterbuf, zp->z_gmtoff + stdoff);
else if (!letters)
letters = "%s";
sprintf(abbr, format, letters);
}
else if (isdst)
{
strcpy(abbr, slashp + 1);
}
else
{
memcpy(abbr, format, slashp - format);
abbr[slashp - format] = '\0';
}
len = strlen(abbr);
if (!doquotes)
return len;
for (cp = abbr; is_alpha(*cp); cp++)
continue;
if (len > 0 && *cp == '\0')
return len;
abbr[len + 2] = '\0';
abbr[len + 1] = '>';
memmove(abbr + 1, abbr, len);
abbr[0] = '<';
return len + 2;
}
static void
updateminmax(const zic_t x)
{
if (min_year > x)
min_year = x;
if (max_year < x)
max_year = x;
}
static int
stringoffset(char *result, zic_t offset)
{
int hours;
int minutes;
int seconds;
bool negative = offset < 0;
int len = negative;
if (negative)
{
offset = -offset;
result[0] = '-';
}
seconds = offset % SECSPERMIN;
offset /= SECSPERMIN;
minutes = offset % MINSPERHOUR;
offset /= MINSPERHOUR;
hours = offset;
if (hours >= HOURSPERDAY * DAYSPERWEEK)
{
result[0] = '\0';
return 0;
}
len += sprintf(result + len, "%d", hours);
if (minutes != 0 || seconds != 0)
{
len += sprintf(result + len, ":%02d", minutes);
if (seconds != 0)
len += sprintf(result + len, ":%02d", seconds);
}
return len;
}
static int
stringrule(char *result, const struct rule *const rp, const zic_t dstoff,
const zic_t gmtoff)
{
zic_t tod = rp->r_tod;
int compat = 0;
if (rp->r_dycode == DC_DOM)
{
int month,
total;
if (rp->r_dayofmonth == 29 && rp->r_month == TM_FEBRUARY)
return -1;
total = 0;
for (month = 0; month < rp->r_month; ++month)
total += len_months[0][month];
/* Omit the "J" in Jan and Feb, as that's shorter. */
if (rp->r_month <= 1)
result += sprintf(result, "%d", total + rp->r_dayofmonth - 1);
else
result += sprintf(result, "J%d", total + rp->r_dayofmonth);
}
else
{
int week;
int wday = rp->r_wday;
int wdayoff;
if (rp->r_dycode == DC_DOWGEQ)
{
wdayoff = (rp->r_dayofmonth - 1) % DAYSPERWEEK;
if (wdayoff)
compat = 2013;
wday -= wdayoff;
tod += wdayoff * SECSPERDAY;
week = 1 + (rp->r_dayofmonth - 1) / DAYSPERWEEK;
}
else if (rp->r_dycode == DC_DOWLEQ)
{
if (rp->r_dayofmonth == len_months[1][rp->r_month])
week = 5;
else
{
wdayoff = rp->r_dayofmonth % DAYSPERWEEK;
if (wdayoff)
compat = 2013;
wday -= wdayoff;
tod += wdayoff * SECSPERDAY;
week = rp->r_dayofmonth / DAYSPERWEEK;
}
}
else
return -1; /* "cannot happen" */
if (wday < 0)
wday += DAYSPERWEEK;
result += sprintf(result, "M%d.%d.%d",
rp->r_month + 1, week, wday);
}
if (rp->r_todisgmt)
tod += gmtoff;
if (rp->r_todisstd && !rp->r_isdst)
tod += dstoff;
if (tod != 2 * SECSPERMIN * MINSPERHOUR)
{
*result++ = '/';
if (!stringoffset(result, tod))
return -1;
if (tod < 0)
{
if (compat < 2013)
compat = 2013;
}
else if (SECSPERDAY <= tod)
{
if (compat < 1994)
compat = 1994;
}
}
return compat;
}
static int
rule_cmp(struct rule const *a, struct rule const *b)
{
if (!a)
return -!!b;
if (!b)
return 1;
if (a->r_hiyear != b->r_hiyear)
return a->r_hiyear < b->r_hiyear ? -1 : 1;
if (a->r_month - b->r_month != 0)
return a->r_month - b->r_month;
return a->r_dayofmonth - b->r_dayofmonth;
}
enum
{
YEAR_BY_YEAR_ZONE = 1};
static int
stringzone(char *result, struct zone const *zpfirst, ptrdiff_t zonecount)
{
const struct zone *zp;
struct rule *rp;
struct rule *stdrp;
struct rule *dstrp;
ptrdiff_t i;
const char *abbrvar;
int compat = 0;
int c;
size_t len;
int offsetlen;
struct rule stdr,
dstr;
result[0] = '\0';
/*
* Internet RFC 8536 section 5.1 says to use an empty TZ string if future
* timestamps are truncated.
*/
if (hi_time < max_time)
return -1;
zp = zpfirst + zonecount - 1;
stdrp = dstrp = NULL;
for (i = 0; i < zp->z_nrules; ++i)
{
rp = &zp->z_rules[i];
if (rp->r_hiwasnum || rp->r_hiyear != ZIC_MAX)
continue;
if (rp->r_yrtype != NULL)
continue;
if (!rp->r_isdst)
{
if (stdrp == NULL)
stdrp = rp;
else
return -1;
}
else
{
if (dstrp == NULL)
dstrp = rp;
else
return -1;
}
}
if (stdrp == NULL && dstrp == NULL)
{
/*
* There are no rules running through "max". Find the latest std rule
* in stdabbrrp and latest rule of any type in stdrp.
*/
struct rule *stdabbrrp = NULL;
for (i = 0; i < zp->z_nrules; ++i)
{
rp = &zp->z_rules[i];
if (!rp->r_isdst && rule_cmp(stdabbrrp, rp) < 0)
stdabbrrp = rp;
if (rule_cmp(stdrp, rp) < 0)
stdrp = rp;
}
/*
* Horrid special case: if year is 2037, presume this is a zone
* handled on a year-by-year basis; do not try to apply a rule to the
* zone.
*/
if (stdrp != NULL && stdrp->r_hiyear == 2037)
return YEAR_BY_YEAR_ZONE;
if (stdrp != NULL && stdrp->r_isdst)
{
/* Perpetual DST. */
dstr.r_month = TM_JANUARY;
dstr.r_dycode = DC_DOM;
dstr.r_dayofmonth = 1;
dstr.r_tod = 0;
dstr.r_todisstd = dstr.r_todisgmt = false;
dstr.r_isdst = stdrp->r_isdst;
dstr.r_stdoff = stdrp->r_stdoff;
dstr.r_abbrvar = stdrp->r_abbrvar;
stdr.r_month = TM_DECEMBER;
stdr.r_dycode = DC_DOM;
stdr.r_dayofmonth = 31;
stdr.r_tod = SECSPERDAY + stdrp->r_stdoff;
stdr.r_todisstd = stdr.r_todisgmt = false;
stdr.r_isdst = false;
stdr.r_stdoff = 0;
stdr.r_abbrvar
= (stdabbrrp ? stdabbrrp->r_abbrvar : "");
dstrp = &dstr;
stdrp = &stdr;
}
}
if (stdrp == NULL && (zp->z_nrules != 0 || zp->z_isdst))
return -1;
abbrvar = (stdrp == NULL) ? "" : stdrp->r_abbrvar;
len = doabbr(result, zp, abbrvar, false, 0, true);
offsetlen = stringoffset(result + len, -zp->z_gmtoff);
if (!offsetlen)
{
result[0] = '\0';
return -1;
}
len += offsetlen;
if (dstrp == NULL)
return compat;
len += doabbr(result + len, zp, dstrp->r_abbrvar,
dstrp->r_isdst, dstrp->r_stdoff, true);
if (dstrp->r_stdoff != SECSPERMIN * MINSPERHOUR)
{
offsetlen = stringoffset(result + len,
-(zp->z_gmtoff + dstrp->r_stdoff));
if (!offsetlen)
{
result[0] = '\0';
return -1;
}
len += offsetlen;
}
result[len++] = ',';
c = stringrule(result + len, dstrp, dstrp->r_stdoff, zp->z_gmtoff);
if (c < 0)
{
result[0] = '\0';
return -1;
}
if (compat < c)
compat = c;
len += strlen(result + len);
result[len++] = ',';
c = stringrule(result + len, stdrp, dstrp->r_stdoff, zp->z_gmtoff);
if (c < 0)
{
result[0] = '\0';
return -1;
}
if (compat < c)
compat = c;
return compat;
}
static void
outzone(const struct zone *zpfirst, ptrdiff_t zonecount)
{
const struct zone *zp;
struct rule *rp;
ptrdiff_t i,
j;
bool usestart,
useuntil;
zic_t starttime,
untiltime;
zic_t gmtoff;
zic_t stdoff;
zic_t year;
zic_t startoff;
bool startttisstd;
bool startttisgmt;
int type;
char *startbuf;
char *ab;
char *envvar;
int max_abbr_len;
int max_envvar_len;
bool prodstic; /* all rules are min to max */
int compat;
bool do_extend;
char version;
ptrdiff_t lastatmax = -1;
zic_t one = 1;
zic_t y2038_boundary = one << 31;
zic_t max_year0;
int defaulttype = -1;
max_abbr_len = 2 + max_format_len + max_abbrvar_len;
max_envvar_len = 2 * max_abbr_len + 5 * 9;
startbuf = emalloc(max_abbr_len + 1);
ab = emalloc(max_abbr_len + 1);
envvar = emalloc(max_envvar_len + 1);
INITIALIZE(untiltime);
INITIALIZE(starttime);
/*
* Now. . .finally. . .generate some useful data!
*/
timecnt = 0;
typecnt = 0;
charcnt = 0;
prodstic = zonecount == 1;
/*
* Thanks to Earl Chew for noting the need to unconditionally initialize
* startttisstd.
*/
startttisstd = false;
startttisgmt = false;
min_year = max_year = EPOCH_YEAR;
if (leapseen)
{
updateminmax(leapminyear);
updateminmax(leapmaxyear + (leapmaxyear < ZIC_MAX));
}
for (i = 0; i < zonecount; ++i)
{
zp = &zpfirst[i];
if (i < zonecount - 1)
updateminmax(zp->z_untilrule.r_loyear);
for (j = 0; j < zp->z_nrules; ++j)
{
rp = &zp->z_rules[j];
if (rp->r_lowasnum)
updateminmax(rp->r_loyear);
if (rp->r_hiwasnum)
updateminmax(rp->r_hiyear);
if (rp->r_lowasnum || rp->r_hiwasnum)
prodstic = false;
}
}
/*
* Generate lots of data if a rule can't cover all future times.
*/
compat = stringzone(envvar, zpfirst, zonecount);
version = compat < 2013 ? ZIC_VERSION_PRE_2013 : ZIC_VERSION;
do_extend = compat < 0 || compat == YEAR_BY_YEAR_ZONE;
if (noise)
{
if (!*envvar)
warning("%s %s",
_("no POSIX environment variable for zone"),
zpfirst->z_name);
else if (compat != 0 && compat != YEAR_BY_YEAR_ZONE)
{
/*
* Circa-COMPAT clients, and earlier clients, might not work for
* this zone when given dates before 1970 or after 2038.
*/
warning(_("%s: pre-%d clients may mishandle"
" distant timestamps"),
zpfirst->z_name, compat);
}
}
if (do_extend)
{
/*
* Search through a couple of extra years past the obvious 400, to
* avoid edge cases. For example, suppose a non-POSIX rule applies
* from 2012 onwards and has transitions in March and September, plus
* some one-off transitions in November 2013. If zic looked only at
* the last 400 years, it would set max_year=2413, with the intent
* that the 400 years 2014 through 2413 will be repeated. The last
* transition listed in the tzfile would be in 2413-09, less than 400
* years after the last one-off transition in 2013-11. Two years
* might be overkill, but with the kind of edge cases available we're
* not sure that one year would suffice.
*/
enum
{
years_of_observations = YEARSPERREPEAT + 2};
if (min_year >= ZIC_MIN + years_of_observations)
min_year -= years_of_observations;
else
min_year = ZIC_MIN;
if (max_year <= ZIC_MAX - years_of_observations)
max_year += years_of_observations;
else
max_year = ZIC_MAX;
/*
* Regardless of any of the above, for a "proDSTic" zone which
* specifies that its rules always have and always will be in effect,
* we only need one cycle to define the zone.
*/
if (prodstic)
{
min_year = 1900;
max_year = min_year + years_of_observations;
}
}
/*
* For the benefit of older systems, generate data from 1900 through 2038.
*/
if (min_year > 1900)
min_year = 1900;
max_year0 = max_year;
if (max_year < 2038)
max_year = 2038;
for (i = 0; i < zonecount; ++i)
{
/*
* A guess that may well be corrected later.
*/
stdoff = 0;
zp = &zpfirst[i];
usestart = i > 0 && (zp - 1)->z_untiltime > min_time;
useuntil = i < (zonecount - 1);
if (useuntil && zp->z_untiltime <= min_time)
continue;
gmtoff = zp->z_gmtoff;
eat(zp->z_filename, zp->z_linenum);
*startbuf = '\0';
startoff = zp->z_gmtoff;
if (zp->z_nrules == 0)
{
stdoff = zp->z_stdoff;
doabbr(startbuf, zp, NULL, zp->z_isdst, stdoff, false);
type = addtype(oadd(zp->z_gmtoff, stdoff),
startbuf, zp->z_isdst, startttisstd,
startttisgmt);
if (usestart)
{
addtt(starttime, type);
usestart = false;
}
else
defaulttype = type;
}
else
for (year = min_year; year <= max_year; ++year)
{
if (useuntil && year > zp->z_untilrule.r_hiyear)
break;
/*
* Mark which rules to do in the current year. For those to
* do, calculate rpytime(rp, year);
*/
for (j = 0; j < zp->z_nrules; ++j)
{
rp = &zp->z_rules[j];
eats(zp->z_filename, zp->z_linenum,
rp->r_filename, rp->r_linenum);
rp->r_todo = year >= rp->r_loyear &&
year <= rp->r_hiyear &&
yearistype(year, rp->r_yrtype);
if (rp->r_todo)
{
rp->r_temp = rpytime(rp, year);
rp->r_todo
= (rp->r_temp < y2038_boundary
|| year <= max_year0);
}
}
for (;;)
{
ptrdiff_t k;
zic_t jtime,
ktime;
zic_t offset;
INITIALIZE(ktime);
if (useuntil)
{
/*
* Turn untiltime into UT assuming the current gmtoff
* and stdoff values.
*/
untiltime = zp->z_untiltime;
if (!zp->z_untilrule.r_todisgmt)
untiltime = tadd(untiltime,
-gmtoff);
if (!zp->z_untilrule.r_todisstd)
untiltime = tadd(untiltime,
-stdoff);
}
/*
* Find the rule (of those to do, if any) that takes
* effect earliest in the year.
*/
k = -1;
for (j = 0; j < zp->z_nrules; ++j)
{
rp = &zp->z_rules[j];
if (!rp->r_todo)
continue;
eats(zp->z_filename, zp->z_linenum,
rp->r_filename, rp->r_linenum);
offset = rp->r_todisgmt ? 0 : gmtoff;
if (!rp->r_todisstd)
offset = oadd(offset, stdoff);
jtime = rp->r_temp;
if (jtime == min_time ||
jtime == max_time)
continue;
jtime = tadd(jtime, -offset);
if (k < 0 || jtime < ktime)
{
k = j;
ktime = jtime;
}
else if (jtime == ktime)
{
char const *dup_rules_msg =
_("two rules for same instant");
eats(zp->z_filename, zp->z_linenum,
rp->r_filename, rp->r_linenum);
warning("%s", dup_rules_msg);
rp = &zp->z_rules[k];
eats(zp->z_filename, zp->z_linenum,
rp->r_filename, rp->r_linenum);
error("%s", dup_rules_msg);
}
}
if (k < 0)
break; /* go on to next year */
rp = &zp->z_rules[k];
rp->r_todo = false;
if (useuntil && ktime >= untiltime)
break;
stdoff = rp->r_stdoff;
if (usestart && ktime == starttime)
usestart = false;
if (usestart)
{
if (ktime < starttime)
{
startoff = oadd(zp->z_gmtoff,
stdoff);
doabbr(startbuf, zp,
rp->r_abbrvar,
rp->r_isdst,
rp->r_stdoff,
false);
continue;
}
if (*startbuf == '\0' &&
startoff == oadd(zp->z_gmtoff,
stdoff))
{
doabbr(startbuf,
zp,
rp->r_abbrvar,
rp->r_isdst,
rp->r_stdoff,
false);
}
}
eats(zp->z_filename, zp->z_linenum,
rp->r_filename, rp->r_linenum);
doabbr(ab, zp, rp->r_abbrvar,
rp->r_isdst, rp->r_stdoff, false);
offset = oadd(zp->z_gmtoff, rp->r_stdoff);
type = addtype(offset, ab, rp->r_isdst,
rp->r_todisstd, rp->r_todisgmt);
if (defaulttype < 0 && !rp->r_isdst)
defaulttype = type;
if (rp->r_hiyear == ZIC_MAX
&& !(0 <= lastatmax
&& ktime < attypes[lastatmax].at))
lastatmax = timecnt;
addtt(ktime, type);
}
}
if (usestart)
{
if (*startbuf == '\0' &&
zp->z_format != NULL &&
strchr(zp->z_format, '%') == NULL &&
strchr(zp->z_format, '/') == NULL)
strcpy(startbuf, zp->z_format);
eat(zp->z_filename, zp->z_linenum);
if (*startbuf == '\0')
error(_("cannot determine time zone abbreviation to use just after until time"));
else
{
bool isdst = startoff != zp->z_gmtoff;
type = addtype(startoff, startbuf, isdst,
startttisstd, startttisgmt);
if (defaulttype < 0 && !isdst)
defaulttype = type;
addtt(starttime, type);
}
}
/*
* Now we may get to set starttime for the next zone line.
*/
if (useuntil)
{
startttisstd = zp->z_untilrule.r_todisstd;
startttisgmt = zp->z_untilrule.r_todisgmt;
starttime = zp->z_untiltime;
if (!startttisstd)
starttime = tadd(starttime, -stdoff);
if (!startttisgmt)
starttime = tadd(starttime, -gmtoff);
}
}
if (defaulttype < 0)
defaulttype = 0;
if (0 <= lastatmax)
attypes[lastatmax].dontmerge = true;
if (do_extend)
{
/*
* If we're extending the explicitly listed observations for 400 years
* because we can't fill the POSIX-TZ field, check whether we actually
* ended up explicitly listing observations through that period. If
* there aren't any near the end of the 400-year period, add a
* redundant one at the end of the final year, to make it clear that
* we are claiming to have definite knowledge of the lack of
* transitions up to that point.
*/
struct rule xr;
struct attype *lastat;
xr.r_month = TM_JANUARY;
xr.r_dycode = DC_DOM;
xr.r_dayofmonth = 1;
xr.r_tod = 0;
for (lastat = attypes, i = 1; i < timecnt; i++)
if (attypes[i].at > lastat->at)
lastat = &attypes[i];
if (!lastat || lastat->at < rpytime(&xr, max_year - 1))
{
addtt(rpytime(&xr, max_year + 1),
lastat ? lastat->type : defaulttype);
attypes[timecnt - 1].dontmerge = true;
}
}
writezone(zpfirst->z_name, envvar, version, defaulttype);
free(startbuf);
free(ab);
free(envvar);
}
static void
addtt(zic_t starttime, int type)
{
attypes = growalloc(attypes, sizeof *attypes, timecnt, &timecnt_alloc);
attypes[timecnt].at = starttime;
attypes[timecnt].dontmerge = false;
attypes[timecnt].type = type;
++timecnt;
}
static int
addtype(zic_t gmtoff, char const *abbr, bool isdst, bool ttisstd, bool ttisgmt)
{
int i,
j;
/*
* See if there's already an entry for this zone type. If so, just return
* its index.
*/
for (i = 0; i < typecnt; ++i)
{
if (gmtoff == gmtoffs[i] && isdst == isdsts[i] &&
strcmp(abbr, &chars[abbrinds[i]]) == 0 &&
ttisstd == ttisstds[i] &&
ttisgmt == ttisgmts[i])
return i;
}
/*
* There isn't one; add a new one, unless there are already too many.
*/
if (typecnt >= TZ_MAX_TYPES)
{
error(_("too many local time types"));
exit(EXIT_FAILURE);
}
if (!(-1L - 2147483647L <= gmtoff && gmtoff <= 2147483647L))
{
error(_("UT offset out of range"));
exit(EXIT_FAILURE);
}
gmtoffs[i] = gmtoff;
isdsts[i] = isdst;
ttisstds[i] = ttisstd;
ttisgmts[i] = ttisgmt;
for (j = 0; j < charcnt; ++j)
if (strcmp(&chars[j], abbr) == 0)
break;
if (j == charcnt)
newabbr(abbr);
abbrinds[i] = j;
++typecnt;
return i;
}
static void
leapadd(zic_t t, bool positive, int rolling, int count)
{
int i,
j;
if (leapcnt + (positive ? count : 1) > TZ_MAX_LEAPS)
{
error(_("too many leap seconds"));
exit(EXIT_FAILURE);
}
for (i = 0; i < leapcnt; ++i)
if (t <= trans[i])
break;
do
{
for (j = leapcnt; j > i; --j)
{
trans[j] = trans[j - 1];
corr[j] = corr[j - 1];
roll[j] = roll[j - 1];
}
trans[i] = t;
corr[i] = positive ? 1 : -count;
roll[i] = rolling;
++leapcnt;
} while (positive && --count != 0);
}
static void
adjleap(void)
{
int i;
zic_t last = 0;
zic_t prevtrans = 0;
/*
* propagate leap seconds forward
*/
for (i = 0; i < leapcnt; ++i)
{
if (trans[i] - prevtrans < 28 * SECSPERDAY)
{
error(_("Leap seconds too close together"));
exit(EXIT_FAILURE);
}
prevtrans = trans[i];
trans[i] = tadd(trans[i], last);
last = corr[i] += last;
}
}
static char *
shellquote(char *b, char const *s)
{
*b++ = '\'';
while (*s)
{
if (*s == '\'')
*b++ = '\'', *b++ = '\\', *b++ = '\'';
*b++ = *s++;
}
*b++ = '\'';
return b;
}
static bool
yearistype(zic_t year, const char *type)
{
char *buf;
char *b;
int result;
if (type == NULL || *type == '\0')
return true;
buf = emalloc(1 + 4 * strlen(yitcommand) + 2
+ INT_STRLEN_MAXIMUM(zic_t) +2 + 4 * strlen(type) + 2);
b = shellquote(buf, yitcommand);
*b++ = ' ';
b += sprintf(b, INT64_FORMAT, year);
*b++ = ' ';
b = shellquote(b, type);
*b = '\0';
result = system(buf);
if (WIFEXITED(result))
{
int status = WEXITSTATUS(result);
if (status <= 1)
{
free(buf);
return status == 0;
}
}
error(_("Wild result from command execution"));
fprintf(stderr, _("%s: command was '%s', result was %d\n"),
progname, buf, result);
exit(EXIT_FAILURE);
}
/* Is A a space character in the C locale? */
static bool
is_space(char a)
{
switch (a)
{
default:
return false;
case ' ':
case '\f':
case '\n':
case '\r':
case '\t':
case '\v':
return true;
}
}
/* Is A an alphabetic character in the C locale? */
static bool
is_alpha(char a)
{
switch (a)
{
default:
return false;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
case 'H':
case 'I':
case 'J':
case 'K':
case 'L':
case 'M':
case 'N':
case 'O':
case 'P':
case 'Q':
case 'R':
case 'S':
case 'T':
case 'U':
case 'V':
case 'W':
case 'X':
case 'Y':
case 'Z':
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
case 'g':
case 'h':
case 'i':
case 'j':
case 'k':
case 'l':
case 'm':
case 'n':
case 'o':
case 'p':
case 'q':
case 'r':
case 's':
case 't':
case 'u':
case 'v':
case 'w':
case 'x':
case 'y':
case 'z':
return true;
}
}
/* If A is an uppercase character in the C locale, return its lowercase
counterpart. Otherwise, return A. */
static char
lowerit(char a)
{
switch (a)
{
default:
return a;
case 'A':
return 'a';
case 'B':
return 'b';
case 'C':
return 'c';
case 'D':
return 'd';
case 'E':
return 'e';
case 'F':
return 'f';
case 'G':
return 'g';
case 'H':
return 'h';
case 'I':
return 'i';
case 'J':
return 'j';
case 'K':
return 'k';
case 'L':
return 'l';
case 'M':
return 'm';
case 'N':
return 'n';
case 'O':
return 'o';
case 'P':
return 'p';
case 'Q':
return 'q';
case 'R':
return 'r';
case 'S':
return 's';
case 'T':
return 't';
case 'U':
return 'u';
case 'V':
return 'v';
case 'W':
return 'w';
case 'X':
return 'x';
case 'Y':
return 'y';
case 'Z':
return 'z';
}
}
/* case-insensitive equality */
static bool
ciequal(const char *ap, const char *bp)
{
while (lowerit(*ap) == lowerit(*bp++))
if (*ap++ == '\0')
return true;
return false;
}
static bool
itsabbr(const char *abbr, const char *word)
{
if (lowerit(*abbr) != lowerit(*word))
return false;
++word;
while (*++abbr != '\0')
do
{
if (*word == '\0')
return false;
} while (lowerit(*word++) != lowerit(*abbr));
return true;
}
/* Return true if ABBR is an initial prefix of WORD, ignoring ASCII case. */
static bool
ciprefix(char const *abbr, char const *word)
{
do
if (!*abbr)
return true;
while (lowerit(*abbr++) == lowerit(*word++));
return false;
}
static const struct lookup *
byword(const char *word, const struct lookup *table)
{
const struct lookup *foundlp;
const struct lookup *lp;
if (word == NULL || table == NULL)
return NULL;
/*
* If TABLE is LASTS and the word starts with "last" followed by a
* non-'-', skip the "last" and look in WDAY_NAMES instead. Warn about any
* usage of the undocumented prefix "last-".
*/
if (table == lasts && ciprefix("last", word) && word[4])
{
if (word[4] == '-')
warning(_("\"%s\" is undocumented; use \"last%s\" instead"),
word, word + 5);
else
{
word += 4;
table = wday_names;
}
}
/*
* Look for exact match.
*/
for (lp = table; lp->l_word != NULL; ++lp)
if (ciequal(word, lp->l_word))
return lp;
/*
* Look for inexact match.
*/
foundlp = NULL;
for (lp = table; lp->l_word != NULL; ++lp)
if (ciprefix(word, lp->l_word))
{
if (foundlp == NULL)
foundlp = lp;
else
return NULL; /* multiple inexact matches */
}
/* Warn about any backward-compatibility issue with pre-2017c zic. */
if (foundlp)
{
bool pre_2017c_match = false;
for (lp = table; lp->l_word; lp++)
if (itsabbr(word, lp->l_word))
{
if (pre_2017c_match)
{
warning(_("\"%s\" is ambiguous in pre-2017c zic"), word);
break;
}
pre_2017c_match = true;
}
}
return foundlp;
}
static char **
getfields(char *cp)
{
char *dp;
char **array;
int nsubs;
if (cp == NULL)
return NULL;
array = emalloc(size_product(strlen(cp) + 1, sizeof *array));
nsubs = 0;
for (;;)
{
while (is_space(*cp))
++cp;
if (*cp == '\0' || *cp == '#')
break;
array[nsubs++] = dp = cp;
do
{
if ((*dp = *cp++) != '"')
++dp;
else
while ((*dp = *cp++) != '"')
if (*dp != '\0')
++dp;
else
{
error(_("Odd number of quotation marks"));
exit(EXIT_FAILURE);
}
} while (*cp && *cp != '#' && !is_space(*cp));
if (is_space(*cp))
++cp;
*dp = '\0';
}
array[nsubs] = NULL;
return array;
}
static void
time_overflow(void)
{
error(_("time overflow"));
exit(EXIT_FAILURE);
}
static zic_t
oadd(zic_t t1, zic_t t2)
{
if (t1 < 0 ? t2 < ZIC_MIN - t1 : ZIC_MAX - t1 < t2)
time_overflow();
return t1 + t2;
}
static zic_t
tadd(zic_t t1, zic_t t2)
{
if (t1 < 0)
{
if (t2 < min_time - t1)
{
if (t1 != min_time)
time_overflow();
return min_time;
}
}
else
{
if (max_time - t1 < t2)
{
if (t1 != max_time)
time_overflow();
return max_time;
}
}
return t1 + t2;
}
/*
* Given a rule, and a year, compute the date (in seconds since January 1,
* 1970, 00:00 LOCAL time) in that year that the rule refers to.
*/
static zic_t
rpytime(const struct rule *rp, zic_t wantedy)
{
int m,
i;
zic_t dayoff; /* with a nod to Margaret O. */
zic_t t,
y;
if (wantedy == ZIC_MIN)
return min_time;
if (wantedy == ZIC_MAX)
return max_time;
dayoff = 0;
m = TM_JANUARY;
y = EPOCH_YEAR;
if (y < wantedy)
{
wantedy -= y;
dayoff = (wantedy / YEARSPERREPEAT) * (SECSPERREPEAT / SECSPERDAY);
wantedy %= YEARSPERREPEAT;
wantedy += y;
}
else if (wantedy < 0)
{
dayoff = (wantedy / YEARSPERREPEAT) * (SECSPERREPEAT / SECSPERDAY);
wantedy %= YEARSPERREPEAT;
}
while (wantedy != y)
{
if (wantedy > y)
{
i = len_years[isleap(y)];
++y;
}
else
{
--y;
i = -len_years[isleap(y)];
}
dayoff = oadd(dayoff, i);
}
while (m != rp->r_month)
{
i = len_months[isleap(y)][m];
dayoff = oadd(dayoff, i);
++m;
}
i = rp->r_dayofmonth;
if (m == TM_FEBRUARY && i == 29 && !isleap(y))
{
if (rp->r_dycode == DC_DOWLEQ)
--i;
else
{
error(_("use of 2/29 in non leap-year"));
exit(EXIT_FAILURE);
}
}
--i;
dayoff = oadd(dayoff, i);
if (rp->r_dycode == DC_DOWGEQ || rp->r_dycode == DC_DOWLEQ)
{
zic_t wday;
#define LDAYSPERWEEK ((zic_t) DAYSPERWEEK)
wday = EPOCH_WDAY;
/*
* Don't trust mod of negative numbers.
*/
if (dayoff >= 0)
wday = (wday + dayoff) % LDAYSPERWEEK;
else
{
wday -= ((-dayoff) % LDAYSPERWEEK);
if (wday < 0)
wday += LDAYSPERWEEK;
}
while (wday != rp->r_wday)
if (rp->r_dycode == DC_DOWGEQ)
{
dayoff = oadd(dayoff, 1);
if (++wday >= LDAYSPERWEEK)
wday = 0;
++i;
}
else
{
dayoff = oadd(dayoff, -1);
if (--wday < 0)
wday = LDAYSPERWEEK - 1;
--i;
}
if (i < 0 || i >= len_months[isleap(y)][m])
{
if (noise)
warning(_("rule goes past start/end of month; \
will not work with pre-2004 versions of zic"));
}
}
if (dayoff < min_time / SECSPERDAY)
return min_time;
if (dayoff > max_time / SECSPERDAY)
return max_time;
t = (zic_t) dayoff * SECSPERDAY;
return tadd(t, rp->r_tod);
}
static void
newabbr(const char *string)
{
int i;
if (strcmp(string, GRANDPARENTED) != 0)
{
const char *cp;
const char *mp;
cp = string;
mp = NULL;
while (is_alpha(*cp) || ('0' <= *cp && *cp <= '9')
|| *cp == '-' || *cp == '+')
++cp;
if (noise && cp - string < 3)
mp = _("time zone abbreviation has fewer than 3 characters");
if (cp - string > ZIC_MAX_ABBR_LEN_WO_WARN)
mp = _("time zone abbreviation has too many characters");
if (*cp != '\0')
mp = _("time zone abbreviation differs from POSIX standard");
if (mp != NULL)
warning("%s (%s)", mp, string);
}
i = strlen(string) + 1;
if (charcnt + i > TZ_MAX_CHARS)
{
error(_("too many, or too long, time zone abbreviations"));
exit(EXIT_FAILURE);
}
strcpy(&chars[charcnt], string);
charcnt += i;
}
/* Ensure that the directories of ARGNAME exist, by making any missing
ones. If ANCESTORS, do this only for ARGNAME's ancestors; otherwise,
do it for ARGNAME too. Exit with failure if there is trouble.
Do not consider an existing non-directory to be trouble. */
static void
mkdirs(char const *argname, bool ancestors)
{
char *name;
char *cp;
cp = name = ecpyalloc(argname);
/*
* On MS-Windows systems, do not worry about drive letters or backslashes,
* as this should suffice in practice. Time zone names do not use drive
* letters and backslashes. If the -d option of zic does not name an
* already-existing directory, it can use slashes to separate the
* already-existing ancestor prefix from the to-be-created subdirectories.
*/
/* Do not mkdir a root directory, as it must exist. */
while (*cp == '/')
cp++;
while (cp && ((cp = strchr(cp, '/')) || !ancestors))
{
if (cp)
*cp = '\0';
/*
* Try to create it. It's OK if creation fails because the directory
* already exists, perhaps because some other process just created it.
* For simplicity do not check first whether it already exists, as
* that is checked anyway if the mkdir fails.
*/
if (mkdir(name, MKDIR_UMASK) != 0)
{
/*
* For speed, skip itsdir if errno == EEXIST. Since mkdirs is
* called only after open fails with ENOENT on a subfile, EEXIST
* implies itsdir here.
*/
int err = errno;
if (err != EEXIST && !itsdir(name))
{
error(_("%s: Cannot create directory %s: %s"),
progname, name, strerror(err));
exit(EXIT_FAILURE);
}
}
if (cp)
*cp++ = '/';
}
free(name);
}
#ifdef WIN32
/*
* To run on win32
*/
int
link(const char *oldpath, const char *newpath)
{
if (!CopyFile(oldpath, newpath, false))
{
_dosmaperr(GetLastError());
return -1;
}
return 0;
}
#endif
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