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timezone/tzcode-revert-03-39fd078a6.patch

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commit 39fd078a694fa762de5ae7efceca1dbfb7be94b3
Author: Paul Eggert <eggert@cs.ucla.edu>
Date: Fri Feb 26 03:33:54 2016 -0800
Port better to MS-Windows
Problems reported by Ian Abbott in:
http://mm.icann.org/pipermail/tz/2016-February/023286.html
http://mm.icann.org/pipermail/tz/2016-February/023287.html
* Makefile (CFLAGS): Add comment about new -D options.
* date.c (environ, optarg, optind, tzname):
* private.h (asctime_r, timezone, daylight, altzone):
* strftime.c (tzname):
* zdump.c (environ, getopt, optarg, optind, tzname):
* zic.c (getopt, link, optarg, optind):
Do not declare if HAVE_POSIX_DECLS, to avoid collisions with
system declarations, which is a problem with MS-Windows
and tzname and the dllimport attribute.
* date.c, zdump.c (tzname): Do not specify size, as POSIX doesn’t.
* private.h (HAVE_POSIX_DECLS): Default to 1.
(ENOTSUP): Default to EINVAL.
* zic.c: If HAVE_DIRECT_H, include direct.h and io.h and
define a mkdir macro, for MS-Windows.
(link, symlink): Set errno to ENOTSUP in the substitutes.
(dolink): Don’t complain merely because link and/or
symlink is not supported. Be a bit more economical and robust
about checking for directories and existing destinations.
Report errno-related string on link failures.
(itsdir): Work correctly even if a directory has a timestamp that
is out of time_t range, so that stat fails with errno ==
EOVERFLOW.
(writezone): Don’t remove files we can’t stat.
diff --git a/Makefile b/Makefile
index 568f7f6..20c2c98 100644
--- a/Makefile
+++ b/Makefile
@@ -106,6 +106,7 @@ LDLIBS=
# Add the following to the end of the "CFLAGS=" line as needed.
# -DBIG_BANG=-9999999LL if the Big Bang occurred at time -9999999 (see zic.c)
+# -DHAVE_DIRECT_H if mkdir needs <direct.h> (MS-Windows)
# -DHAVE_DOS_FILE_NAMES if file names have drive specifiers etc. (MS-DOS)
# -DHAVE_GETTEXT=1 if 'gettext' works (GNU, Linux, Solaris); also see LDLIBS
# -DHAVE_INCOMPATIBLE_CTIME_R=1 if your system's time.h declares
@@ -116,6 +117,8 @@ LDLIBS=
# -DHAVE_LOCALTIME_RZ=0 if you do not want zdump to use localtime_rz
# This defaults to 1 if a working localtime_rz seems to be available.
# localtime_rz can make zdump significantly faster, but is nonstandard.
+# -DHAVE_POSIX_DECLS=0 if your system's include files do not declare
+# functions like 'link' or variables like 'tzname' required by POSIX
# -DHAVE_STDINT_H=1 if you have a pre-C99 compiler with "stdint.h"
# -DHAVE_STRFTIME_L=1 if <time.h> declares locale_t and strftime_l
# This defaults to 0 if _POSIX_VERSION < 200809, 1 otherwise.
diff --git a/date.c b/date.c
index 824e57d..4c11f61 100644
--- a/date.c
+++ b/date.c
@@ -42,10 +42,12 @@
#define SECSPERMIN 60
#endif /* !defined SECSPERMIN */
+#if !HAVE_POSIX_DECLS
extern char ** environ;
extern char * optarg;
extern int optind;
-extern char * tzname[2];
+extern char * tzname[];
+#endif
static int retval = EXIT_SUCCESS;
diff --git a/private.h b/private.h
index 1c176e6..6080e71 100644
--- a/private.h
+++ b/private.h
@@ -34,6 +34,10 @@
#define HAVE_LINK 1
#endif /* !defined HAVE_LINK */
+#ifndef HAVE_POSIX_DECLS
+#define HAVE_POSIX_DECLS 1
+#endif
+
#ifndef HAVE_STRDUP
#define HAVE_STRDUP 1
#endif
@@ -106,6 +110,9 @@
#ifndef ENAMETOOLONG
# define ENAMETOOLONG EINVAL
#endif
+#ifndef ENOTSUP
+# define ENOTSUP EINVAL
+#endif
#ifndef EOVERFLOW
# define EOVERFLOW EINVAL
#endif
@@ -379,6 +386,8 @@ time_t time(time_t *);
void tzset(void);
#endif
+#if !HAVE_POSIX_DECLS
+
/*
** Some time.h implementations don't declare asctime_r.
** Others might define it as a macro.
@@ -402,6 +411,8 @@ extern int daylight;
extern long altzone;
#endif
+#endif
+
/*
** The STD_INSPIRED functions are similar, but most also need
** declarations if time_tz is defined.
diff --git a/strftime.c b/strftime.c
index 7a139bd..f75f9fd 100644
--- a/strftime.c
+++ b/strftime.c
@@ -106,7 +106,9 @@ static char * _fmt(const char *, const struct tm *, char *, const char *,
int *);
static char * _yconv(int, int, bool, bool, char *, char const *);
+#if !HAVE_POSIX_DECLS
extern char * tzname[];
+#endif
#ifndef YEAR_2000_NAME
#define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS"
diff --git a/zdump.c b/zdump.c
index 063a263..64d90f6 100644
--- a/zdump.c
+++ b/zdump.c
@@ -238,12 +238,14 @@ enum { SECSPER400YEARS_FITS = SECSPERLYEAR <= INTMAX_MAX / 400 };
# define timezone_t char **
#endif
+#if !HAVE_POSIX_DECLS
extern char ** environ;
extern int getopt(int argc, char * const argv[],
const char * options);
extern char * optarg;
extern int optind;
-extern char * tzname[2];
+extern char * tzname[];
+#endif
/* The minimum and maximum finite time values. */
enum { atime_shift = CHAR_BIT * sizeof (time_t) - 2 };
diff --git a/zic.c b/zic.c
index 78ab870..0ec3359 100644
--- a/zic.c
+++ b/zic.c
@@ -22,6 +22,13 @@ typedef int_fast64_t zic_t;
#define ZIC_MAX_ABBR_LEN_WO_WARN 6
#endif /* !defined ZIC_MAX_ABBR_LEN_WO_WARN */
+#ifdef HAVE_DIRECT_H
+# include <direct.h>
+# include <io.h>
+# undef mkdir
+# define mkdir(name, mode) _mkdir(name)
+#endif
+
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
@@ -87,17 +94,19 @@ struct zone {
zic_t z_untiltime;
};
+#if !HAVE_POSIX_DECLS
extern int getopt(int argc, char * const argv[],
const char * options);
extern int link(const char * fromname, const char * toname);
extern char * optarg;
extern int optind;
+#endif
#if ! HAVE_LINK
-# define link(from, to) (-1)
+# define link(from, to) (errno = ENOTSUP, -1)
#endif
#if ! HAVE_SYMLINK
-# define symlink(from, to) (-1)
+# define symlink(from, to) (errno = ENOTSUP, -1)
#endif
static void addtt(zic_t starttime, int type);
@@ -758,41 +767,47 @@ dolink(char const *fromfield, char const *tofield)
progname, fromname, e);
exit(EXIT_FAILURE);
}
- if (itsdir(toname) <= 0)
- remove(toname);
if (link(fromname, toname) != 0) {
- int result;
+ int link_errno = errno;
+ bool retry_if_link_supported = false;
- if (! mkdirs(toname))
- exit(EXIT_FAILURE);
-
- result = link(fromname, toname);
- if (result != 0) {
- const char *s = fromfield;
- const char *t;
- char *p;
- size_t dotdots = 0;
- register char * symlinkcontents = NULL;
-
- do
- t = s;
- while ((s = strchr(s, '/'))
- && ! strncmp (fromfield, tofield,
- ++s - fromfield));
-
- for (s = tofield + (t - fromfield); *s; s++)
- dotdots += *s == '/';
- symlinkcontents
- = emalloc(3 * dotdots + strlen(t) + 1);
- for (p = symlinkcontents; dotdots-- != 0; p += 3)
- memcpy(p, "../", 3);
- strcpy(p, t);
- result = symlink(symlinkcontents, toname);
- if (result == 0)
-warning(_("hard link failed, symbolic link used"));
- free(symlinkcontents);
- }
- if (result != 0) {
+ if (link_errno == ENOENT || link_errno == ENOTSUP) {
+ if (! mkdirs(toname))
+ exit(EXIT_FAILURE);
+ retry_if_link_supported = true;
+ }
+ if ((link_errno == EEXIST || link_errno == ENOTSUP)
+ && itsdir(toname) == 0
+ && (remove(toname) == 0 || errno == ENOENT))
+ retry_if_link_supported = true;
+ if (retry_if_link_supported && link_errno != ENOTSUP)
+ link_errno = link(fromname, toname) == 0 ? 0 : errno;
+ if (link_errno != 0) {
+ const char *s = fromfield;
+ const char *t;
+ char *p;
+ size_t dotdots = 0;
+ char *symlinkcontents;
+ int symlink_result;
+
+ do
+ t = s;
+ while ((s = strchr(s, '/'))
+ && strncmp(fromfield, tofield, ++s - fromfield) == 0);
+
+ for (s = tofield + (t - fromfield); *s; s++)
+ dotdots += *s == '/';
+ symlinkcontents = emalloc(3 * dotdots + strlen(t) + 1);
+ for (p = symlinkcontents; dotdots-- != 0; p += 3)
+ memcpy(p, "../", 3);
+ strcpy(p, t);
+ symlink_result = symlink(symlinkcontents, toname);
+ free(symlinkcontents);
+ if (symlink_result == 0) {
+ if (link_errno != ENOTSUP)
+ warning(_("symbolic link used because hard link failed: %s"),
+ strerror (link_errno));
+ } else {
FILE *fp, *tp;
int c;
fp = fopen(fromname, "rb");
@@ -815,8 +830,11 @@ warning(_("hard link failed, symbolic link used"));
putc(c, tp);
close_file(fp, fromname);
close_file(tp, toname);
- warning(_("link failed, copy used"));
- }
+ if (link_errno != ENOTSUP)
+ warning(_("copy used because hard link failed: %s"),
+ strerror (link_errno));
+ }
+ }
}
free(fromname);
free(toname);
@@ -863,18 +881,17 @@ itsdir(char const *name)
{
struct stat st;
int res = stat(name, &st);
- if (res != 0)
- return res;
#ifdef S_ISDIR
- return S_ISDIR(st.st_mode) != 0;
-#else
- {
+ if (res == 0)
+ return S_ISDIR(st.st_mode) != 0;
+#endif
+ if (res == 0 || errno == EOVERFLOW) {
char *nameslashdot = relname(name, ".");
- res = stat(nameslashdot, &st);
+ bool dir = stat(nameslashdot, &st) == 0 || errno == EOVERFLOW;
free(nameslashdot);
- return res == 0;
+ return dir;
}
-#endif
+ return -1;
}
/*
@@ -1685,7 +1702,7 @@ writezone(const char *const name, const char *const string, char version)
/*
** Remove old file, if any, to snap links.
*/
- if (itsdir(fullname) <= 0 && remove(fullname) != 0 && errno != ENOENT) {
+ if (itsdir(fullname) == 0 && remove(fullname) != 0 && errno != ENOENT) {
const char *e = strerror(errno);
fprintf(stderr, _("%s: Can't remove %s: %s\n"),
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