update to 8.2.23RC1

1 files changed, 0 insertions, 746 deletions

diff --git a/php-8.1.0-systzdata-v24.patch b/php-8.1.0-systzdata-v24.patch
deleted file mode 100644
index ca6e634..0000000
--- a/php-8.1.0-systzdata-v24.patch
+++ /dev/null
@@ -1,746 +0,0 @@
-# License: MIT
-# http://opensource.org/licenses/MIT
-
-Add support for use of the system timezone database, rather
-than embedding a copy.  Discussed upstream but was not desired.
-
-History:
-f24: add internal UTC if tzdata is missing
-r23: fix possible buffer overflow
-r22: retrieve tzdata version from /usr/share/zoneinfo/tzdata.zi
-r21: adapt for timelib 2021.03 (in 8.1.0)
-r20: adapt for timelib 2020.03 (in 8.0.10RC1)
-r19: adapt for timelib 2020.02 (in 8.0.0beta2)
-r18: adapt for autotool change in 7.3.3RC1
-r17: adapt for timelib 2018.01 (in 7.3.2RC1)
-r16: adapt for timelib 2017.06 (in 7.2.3RC1)
-r15: adapt for timelib 2017.05beta7 (in 7.2.0RC1)
-r14: improve check for valid tz file
-r13: adapt for upstream changes to use PHP allocator
-r12: adapt for upstream changes for new zic
-r11: use canonical names to avoid more case sensitivity issues
-     round lat/long from zone.tab towards zero per builtin db
-r10: make timezone case insensitive
-r9: fix another compile error without --with-system-tzdata configured (Michael Heimpold)
-r8: fix compile error without --with-system-tzdata configured
-r7: improve check for valid timezone id to exclude directories
-r6: fix fd leak in r5, fix country code/BC flag use in
-    timezone_identifiers_list() using system db,
-    fix use of PECL timezonedb to override system db,
-r5: reverts addition of "System/Localtime" fake tzname.
-    updated for 5.3.0, parses zone.tab to pick up mapping between
-    timezone name, country code and long/lat coords
-r4: added "System/Localtime" tzname which uses /etc/localtime
-r3: fix a crash if /usr/share/zoneinfo doesn't exist (Raphael Geissert)
-r2: add filesystem trawl to set up name alias index
-r1: initial revision
-
-
-diff --git a/ext/date/config0.m4 b/ext/date/config0.m4
-index 6b803bf33e..53c3cdb3f4 100644
---- a/ext/date/config0.m4
-+++ b/ext/date/config0.m4
-@@ -4,6 +4,19 @@ AC_CHECK_HEADERS([io.h])
- dnl Check for strtoll, atoll
- AC_CHECK_FUNCS(strtoll atoll)
- 
-+PHP_ARG_WITH(system-tzdata, for use of system timezone data,
-+[  --with-system-tzdata[=DIR]      to specify use of system timezone data],
-+no, no)
-+
-+if test "$PHP_SYSTEM_TZDATA" != "no"; then
-+   AC_DEFINE(HAVE_SYSTEM_TZDATA, 1, [Define if system timezone data is used])
-+
-+   if test "$PHP_SYSTEM_TZDATA" != "yes"; then
-+      AC_DEFINE_UNQUOTED(HAVE_SYSTEM_TZDATA_PREFIX, "$PHP_SYSTEM_TZDATA",
-+                         [Define for location of system timezone data])
-+   fi
-+fi
-+
- PHP_DATE_CFLAGS="-Wno-implicit-fallthrough -I@ext_builddir@/lib -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -DHAVE_TIMELIB_CONFIG_H=1"
- timelib_sources="lib/astro.c lib/dow.c lib/parse_date.c lib/parse_tz.c lib/parse_posix.c
-                  lib/timelib.c lib/tm2unixtime.c lib/unixtime2tm.c lib/parse_iso_intervals.c lib/interval.c"
-diff --git a/ext/date/lib/parse_tz.c b/ext/date/lib/parse_tz.c
-index c7f93580d7..ec196a98b6 100644
---- a/ext/date/lib/parse_tz.c
-+++ b/ext/date/lib/parse_tz.c
-@@ -26,9 +26,33 @@
- #include "timelib.h"
- #include "timelib_private.h"
- 
-+#ifdef HAVE_SYSTEM_TZDATA
-+#include <sys/mman.h>
-+#include <sys/stat.h>
-+#include <limits.h>
-+#include <fcntl.h>
-+#include <unistd.h>
-+
-+#include "php_scandir.h"
-+
-+static const unsigned char internal_utc[] = {
-+        0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
-+        0x00, 0x00, 0x55, 0x54, 0x43, 0x00, 0x54, 0x5a, 0x69, 0x66, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00,
-+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
-+        0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0x54, 0x43, 0x00, 0x0a, 0x55, 0x54, 0x43,
-+        0x30, 0x0a
-+};
-+
-+#else
- #define TIMELIB_SUPPORTS_V2DATA
- #define TIMELIB_SUPPORT_SLIM_FILE
- #include "timezonedb.h"
-+#endif
-+
-+#include <ctype.h>
- 
- #if (defined(__APPLE__) || defined(__APPLE_CC__)) && (defined(__BIG_ENDIAN__) || defined(__LITTLE_ENDIAN__))
- # if defined(__LITTLE_ENDIAN__)
-@@ -95,6 +119,11 @@ static int read_php_preamble(const unsigned char **tzf, timelib_tzinfo *tz)
- {
- 	uint32_t version;
- 
-+	if (memcmp(*tzf, "TZif", 4) == 0) {
-+		*tzf += 20;
-+		return 0;
-+	}
-+
- 	/* read ID */
- 	version = (*tzf)[3] - '0';
- 	*tzf += 4;
-@@ -577,7 +606,475 @@ void timelib_dump_tzinfo(timelib_tzinfo *tz)
- 	}
- }
- 
--static int seek_to_tz_position(const unsigned char **tzf, const char *timezone, const timelib_tzdb *tzdb)
-+#ifdef HAVE_SYSTEM_TZDATA
-+
-+#ifdef HAVE_SYSTEM_TZDATA_PREFIX
-+#define ZONEINFO_PREFIX HAVE_SYSTEM_TZDATA_PREFIX
-+#else
-+#define ZONEINFO_PREFIX "/usr/share/zoneinfo"
-+#endif
-+
-+/* System timezone database pointer. */
-+static const timelib_tzdb *timezonedb_system;
-+
-+/* Hash table entry for the cache of the zone.tab mapping table. */
-+struct location_info {
-+        char code[2];
-+        double latitude, longitude;
-+        char name[64];
-+        char *comment;
-+        struct location_info *next;
-+};
-+
-+/* Cache of zone.tab. */
-+static struct location_info **system_location_table;
-+
-+/* Size of the zone.tab hash table; a random-ish prime big enough to
-+ * prevent too many collisions. */
-+#define LOCINFO_HASH_SIZE (1021)
-+
-+/* Compute a case insensitive hash of str */
-+static uint32_t tz_hash(const char *str)
-+{
-+    const unsigned char *p = (const unsigned char *)str;
-+    uint32_t hash = 5381;
-+    int c;
-+
-+    while ((c = tolower(*p++)) != '\0') {
-+        hash = (hash << 5) ^ hash ^ c;
-+    }
-+
-+    return hash % LOCINFO_HASH_SIZE;
-+}
-+
-+/* Parse an ISO-6709 date as used in zone.tab. Returns end of the
-+ * parsed string on success, or NULL on parse error.  On success,
-+ * writes the parsed number to *result. */
-+static char *parse_iso6709(char *p, double *result)
-+{
-+    double v, sign;
-+    char *pend;
-+    size_t len;
-+
-+    if (*p == '+')
-+        sign = 1.0;
-+    else if (*p == '-')
-+        sign = -1.0;
-+    else
-+        return NULL;
-+
-+    p++;
-+    for (pend = p; *pend >= '0' && *pend <= '9'; pend++)
-+        ;;
-+
-+    /* Annoying encoding used by zone.tab has no decimal point, so use
-+     * the length to determine the format:
-+     * 
-+     * 4 = DDMM
-+     * 5 = DDDMM
-+     * 6 = DDMMSS
-+     * 7 = DDDMMSS
-+     */
-+    len = pend - p;
-+    if (len < 4 || len > 7) {
-+        return NULL;
-+    }
-+
-+    /* p => [D]DD */
-+    v = (p[0] - '0') * 10.0 + (p[1] - '0');
-+    p += 2;
-+    if (len == 5 || len == 7)
-+        v = v * 10.0 + (*p++ - '0');
-+    /* p => MM[SS] */
-+    v += (10.0 * (p[0] - '0')
-+          + p[1] - '0') / 60.0;
-+    p += 2;
-+    /* p => [SS] */
-+    if (len > 5) {
-+        v += (10.0 * (p[0] - '0')
-+              + p[1] - '0') / 3600.0;
-+        p += 2;
-+    }
-+
-+    /* Round to five decimal place, not because it's a good idea,
-+     * but, because the builtin data uses rounded data, so, match
-+     * that. */
-+    *result = trunc(v * sign * 100000.0) / 100000.0;
-+
-+    return p;
-+}
-+
-+/* This function parses the zone.tab file to build up the mapping of
-+ * timezone to country code and geographic location, and returns a
-+ * hash table.  The hash table is indexed by the function:
-+ *
-+ *   tz_hash(timezone-name)
-+ */
-+static struct location_info **create_location_table(void)
-+{
-+    struct location_info **li, *i;
-+    char zone_tab[PATH_MAX];
-+    char line[512];
-+    FILE *fp;
-+
-+    strncpy(zone_tab, ZONEINFO_PREFIX "/zone.tab", sizeof zone_tab);
-+
-+    fp = fopen(zone_tab, "r");
-+    if (!fp) {
-+        return NULL;
-+    }
-+
-+    li = calloc(LOCINFO_HASH_SIZE, sizeof *li);
-+
-+    while (fgets(line, sizeof line, fp)) {
-+        char *p = line, *code, *name, *comment;
-+        uint32_t hash;
-+        double latitude, longitude;
-+
-+        while (isspace(*p))
-+            p++;
-+
-+        if (*p == '#' || *p == '\0' || *p == '\n')
-+            continue;
-+        
-+        if (!isalpha(p[0]) || !isalpha(p[1]) || p[2] != '\t')
-+            continue;
-+        
-+        /* code => AA */
-+        code = p;
-+        p[2] = 0;
-+        p += 3;
-+
-+        /* coords => [+-][D]DDMM[SS][+-][D]DDMM[SS] */
-+        p = parse_iso6709(p, &latitude);
-+        if (!p) {
-+            continue;
-+        }
-+        p = parse_iso6709(p, &longitude);
-+        if (!p) {
-+            continue;
-+        }
-+
-+        if (!p || *p != '\t') {
-+            continue;
-+        }
-+
-+        /* name = string */
-+        name = ++p;
-+        while (*p != '\t' && *p && *p != '\n')
-+            p++;
-+
-+        *p++ = '\0';
-+
-+        /* comment = string */
-+        comment = p;
-+        while (*p != '\t' && *p && *p != '\n')
-+            p++;
-+
-+        if (*p == '\n' || *p == '\t')
-+            *p = '\0';
-+        
-+        hash = tz_hash(name);
-+        i = malloc(sizeof *i);
-+        memcpy(i->code, code, 2);
-+        strncpy(i->name, name, sizeof i->name);
-+        i->comment = strdup(comment);
-+        i->longitude = longitude;
-+        i->latitude = latitude;
-+        i->next = li[hash];
-+        li[hash] = i;
-+        /* printf("%s [%u, %f, %f]\n", name, hash, latitude, longitude); */
-+    }
-+
-+    fclose(fp);
-+
-+    return li;
-+}
-+
-+/* Return location info from hash table, using given timezone name.
-+ * Returns NULL if the name could not be found. */
-+const struct location_info *find_zone_info(struct location_info **li, 
-+                                           const char *name)
-+{
-+    uint32_t hash = tz_hash(name);
-+    const struct location_info *l;
-+
-+    if (!li) {
-+        return NULL;
-+    }
-+
-+    for (l = li[hash]; l; l = l->next) {
-+        if (timelib_strcasecmp(l->name, name) == 0)
-+            return l;
-+    }
-+
-+    return NULL;
-+}    
-+
-+/* Filter out some non-tzdata files and the posix/right databases, if
-+ * present. */
-+static int index_filter(const struct dirent *ent)
-+{
-+	return strcmp(ent->d_name, ".") != 0
-+		&& strcmp(ent->d_name, "..") != 0
-+		&& strcmp(ent->d_name, "posix") != 0
-+		&& strcmp(ent->d_name, "posixrules") != 0
-+		&& strcmp(ent->d_name, "right") != 0
-+		&& strstr(ent->d_name, ".list") == NULL
-+		&& strstr(ent->d_name, ".tab") == NULL;
-+}
-+
-+static int sysdbcmp(const void *first, const void *second)
-+{
-+        const timelib_tzdb_index_entry *alpha = first, *beta = second;
-+
-+        return timelib_strcasecmp(alpha->id, beta->id);
-+}
-+
-+/* Retrieve tzdata version. */
-+static void retrieve_zone_version(timelib_tzdb *db)
-+{
-+    static char buf[30];
-+    char path[PATH_MAX];
-+    FILE *fp;
-+
-+    strncpy(path, ZONEINFO_PREFIX "/tzdata.zi", sizeof(path));
-+
-+    fp = fopen(path, "r");
-+    if (fp) {
-+		if (fgets(buf, sizeof(buf), fp)) {
-+			if (!memcmp(buf, "# version ", 10) &&
-+				isdigit(buf[10]) &&
-+				isdigit(buf[11]) &&
-+				isdigit(buf[12]) &&
-+				isdigit(buf[13]) &&
-+				islower(buf[14])) {
-+				if (buf[14] >= 't') {        /* 2022t = 2022.20 */
-+					buf[17] = 0;
-+					buf[16] = buf[14] - 't' + '0';
-+					buf[15] = '2';
-+				} else if (buf[14] >= 'j') { /* 2022j = 2022.10 */
-+					buf[17] = 0;
-+					buf[16] = buf[14] - 'j' + '0';
-+					buf[15] = '1';
-+				} else {                     /* 2022a = 2022.1  */
-+					buf[16] = 0;
-+					buf[15] = buf[14] - 'a' + '1';
-+				}
-+				buf[14] = '.';
-+				db->version = buf+10;
-+			}
-+		}
-+		fclose(fp);
-+    }
-+}
-+
-+
-+/* Create the zone identifier index by trawling the filesystem. */
-+static void create_zone_index(timelib_tzdb *db)
-+{
-+	size_t dirstack_size,  dirstack_top;
-+	size_t index_size, index_next;
-+	timelib_tzdb_index_entry *db_index;
-+	char **dirstack;
-+
-+	/* LIFO stack to hold directory entries to scan; each slot is a
-+	 * directory name relative to the zoneinfo prefix. */
-+	dirstack_size = 32;
-+	dirstack = malloc(dirstack_size * sizeof *dirstack);
-+	dirstack_top = 1;
-+	dirstack[0] = strdup("");
-+	
-+	/* Index array. */
-+	index_size = 64;
-+	db_index = malloc(index_size * sizeof *db_index);
-+	index_next = 0;
-+
-+	do {
-+		struct dirent **ents;
-+		char name[PATH_MAX], *top;
-+		int count;
-+
-+		/* Pop the top stack entry, and iterate through its contents. */
-+		top = dirstack[--dirstack_top];
-+		snprintf(name, sizeof name, ZONEINFO_PREFIX "/%s", top);
-+
-+		count = php_scandir(name, &ents, index_filter, php_alphasort);
-+
-+		while (count > 0) {
-+			struct stat st;
-+			const char *leaf = ents[count - 1]->d_name;
-+
-+			snprintf(name, sizeof name, ZONEINFO_PREFIX "/%s/%s", 
-+				 top, leaf);
-+			
-+			if (strlen(name) && stat(name, &st) == 0) {
-+				/* Name, relative to the zoneinfo prefix. */
-+				const char *root = top;
-+
-+				if (root[0] == '/') root++;
-+
-+				snprintf(name, sizeof name, "%s%s%s", root, 
-+					 *root ? "/": "", leaf);
-+
-+				if (S_ISDIR(st.st_mode)) {
-+					if (dirstack_top == dirstack_size) {
-+						dirstack_size *= 2;
-+						dirstack = realloc(dirstack, 
-+								   dirstack_size * sizeof *dirstack);
-+					}
-+					dirstack[dirstack_top++] = strdup(name);
-+				}
-+				else {
-+					if (index_next == index_size) {
-+						index_size *= 2;
-+						db_index = realloc(db_index,
-+								   index_size * sizeof *db_index);
-+					}
-+
-+					db_index[index_next++].id = strdup(name);
-+				}
-+			}
-+
-+			free(ents[--count]);
-+		}
-+		
-+		if (count != -1) free(ents);
-+		free(top);
-+	} while (dirstack_top);
-+
-+        qsort(db_index, index_next, sizeof *db_index, sysdbcmp);
-+
-+	if (!index_next) {
-+		db_index[index_next++].id = strdup("UTC");
-+	}
-+	db->index = db_index;
-+	db->index_size = index_next;
-+
-+	free(dirstack);
-+}
-+
-+#define FAKE_HEADER "1234\0??\1??"
-+#define FAKE_UTC_POS (7 - 4)
-+
-+/* Create a fake data segment for database 'sysdb'. */
-+static void fake_data_segment(timelib_tzdb *sysdb,
-+                              struct location_info **info)
-+{
-+        size_t n;
-+        char *data, *p;
-+        
-+        data = malloc(3 * sysdb->index_size + sizeof(FAKE_HEADER) - 1);
-+
-+        p = mempcpy(data, FAKE_HEADER, sizeof(FAKE_HEADER) - 1);
-+
-+        for (n = 0; n < sysdb->index_size; n++) {
-+                const struct location_info *li;
-+                timelib_tzdb_index_entry *ent;
-+
-+                ent = (timelib_tzdb_index_entry *)&sysdb->index[n];
-+
-+                /* Lookup the timezone name in the hash table. */
-+                if (strcmp(ent->id, "UTC") == 0) {
-+                        ent->pos = FAKE_UTC_POS;
-+                        continue;
-+                }
-+
-+                li = find_zone_info(info, ent->id);
-+                if (li) {
-+                        /* If found, append the BC byte and the
-+                         * country code; set the position for this
-+                         * section of timezone data.  */
-+                        ent->pos = (p - data) - 4;
-+                        *p++ = '\1';
-+                        *p++ = li->code[0];
-+                        *p++ = li->code[1];
-+                }
-+                else {
-+                        /* If not found, the timezone data can
-+                         * point at the header. */
-+                        ent->pos = 0;
-+                }
-+        }
-+        
-+        sysdb->data = (unsigned char *)data;
-+}
-+
-+/* Returns true if the passed-in stat structure describes a
-+ * probably-valid timezone file. */
-+static int is_valid_tzfile(const struct stat *st, int fd)
-+{
-+	if (fd) {
-+		char buf[20];
-+		if (read(fd, buf, 20)!=20) {
-+			return 0;
-+		}
-+		lseek(fd, SEEK_SET, 0);
-+		if (memcmp(buf, "TZif", 4)) {
-+			return 0;
-+		}
-+	}
-+	return S_ISREG(st->st_mode) && st->st_size > 20;
-+}
-+
-+/* To allow timezone names to be used case-insensitively, find the
-+ * canonical name for this timezone, if possible. */
-+static const char *canonical_tzname(const char *timezone)
-+{
-+    if (timezonedb_system) {
-+        timelib_tzdb_index_entry *ent, lookup;
-+
-+        lookup.id = (char *)timezone;
-+
-+        ent = bsearch(&lookup, timezonedb_system->index,
-+                      timezonedb_system->index_size, sizeof lookup,
-+                      sysdbcmp);
-+        if (ent) {
-+            return ent->id;
-+        }
-+    }
-+
-+    return timezone;
-+}
-+
-+/* Return the mmap()ed tzfile if found, else NULL.  On success, the
-+ * length of the mapped data is placed in *length. */
-+static char *map_tzfile(const char *timezone, size_t *length)
-+{
-+	char fname[PATH_MAX];
-+	struct stat st;
-+	char *p;
-+	int fd;
-+	
-+	if (timezone[0] == '\0' || strstr(timezone, "..") != NULL) {
-+		return NULL;
-+	}
-+
-+	snprintf(fname, sizeof fname, ZONEINFO_PREFIX "/%s", canonical_tzname(timezone));
-+
-+	fd = open(fname, O_RDONLY);
-+	if (fd == -1) {
-+		if (strcmp(timezone, "UTC")) {
-+			return NULL;
-+		} else {
-+			*length = sizeof(internal_utc);
-+			return internal_utc;
-+		}
-+	} else if (fstat(fd, &st) != 0 || !is_valid_tzfile(&st, fd)) {
-+		close(fd);
-+		return NULL;
-+	}
-+
-+	*length = st.st_size;
-+	p = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
-+	close(fd);
-+	
-+	return p != MAP_FAILED ? p : NULL;
-+}
-+
-+#endif
-+
-+static int inmem_seek_to_tz_position(const unsigned char **tzf, const char *timezone, const timelib_tzdb *tzdb)
- {
- 	int left = 0, right = tzdb->index_size - 1;
- 
-@@ -603,9 +1100,49 @@ static int seek_to_tz_position(const unsigned char **tzf, const char *timezone,
- 	return 0;
- }
- 
-+static int seek_to_tz_position(const unsigned char **tzf, const char *timezone,
-+			       char **map, size_t *maplen,
-+			       const timelib_tzdb *tzdb)
-+{
-+#ifdef HAVE_SYSTEM_TZDATA
-+	if (tzdb == timezonedb_system) {
-+		char *orig;
-+
-+		orig = map_tzfile(timezone, maplen);
-+		if (orig == NULL) {
-+			return 0;
-+		}
-+
-+		(*tzf) = (unsigned char *)orig;
-+		*map = orig;
-+        return 1;
-+	}
-+	else
-+#endif
-+	{
-+		return inmem_seek_to_tz_position(tzf, timezone, tzdb);
-+	}
-+}
-+
- const timelib_tzdb *timelib_builtin_db(void)
- {
-+#ifdef HAVE_SYSTEM_TZDATA
-+	if (timezonedb_system == NULL) {
-+		timelib_tzdb *tmp = malloc(sizeof *tmp);
-+
-+		tmp->version = "0";
-+		tmp->data = NULL;
-+		create_zone_index(tmp);
-+		retrieve_zone_version(tmp);
-+		system_location_table = create_location_table();
-+		fake_data_segment(tmp, system_location_table);
-+		timezonedb_system = tmp;
-+	}
-+
-+	return timezonedb_system;
-+#else
- 	return &timezonedb_builtin;
-+#endif
- }
- 
- const timelib_tzdb_index_entry *timelib_timezone_identifiers_list(const timelib_tzdb *tzdb, int *count)
-@@ -617,7 +1154,32 @@ const timelib_tzdb_index_entry *timelib_timezone_identifiers_list(const timelib_
- int timelib_timezone_id_is_valid(const char *timezone, const timelib_tzdb *tzdb)
- {
- 	const unsigned char *tzf;
--	return (seek_to_tz_position(&tzf, timezone, tzdb));
-+
-+#ifdef HAVE_SYSTEM_TZDATA
-+	if (tzdb == timezonedb_system) {
-+		char fname[PATH_MAX];
-+		struct stat st;
-+
-+		if (timezone[0] == '\0' || strstr(timezone, "..") != NULL) {
-+			return 0;
-+		}
-+		if (!strcmp(timezone, "UTC")) {
-+			return 1;
-+		}
-+		if (system_location_table) {
-+			if (find_zone_info(system_location_table, timezone) != NULL) {
-+				/* found in cache */
-+				return 1;
-+			}
-+		}
-+
-+		snprintf(fname, sizeof fname, ZONEINFO_PREFIX "/%s", canonical_tzname(timezone));
-+
-+		return stat(fname, &st) == 0 && is_valid_tzfile(&st, 0);
-+	}
-+#endif
-+
-+	return (inmem_seek_to_tz_position(&tzf, timezone, tzdb));
- }
- 
- static int skip_64bit_preamble(const unsigned char **tzf, timelib_tzinfo *tz)
-@@ -662,6 +1224,8 @@ static timelib_tzinfo* timelib_tzinfo_ctor(const char *name)
- timelib_tzinfo *timelib_parse_tzfile(const char *timezone, const timelib_tzdb *tzdb, int *error_code)
- {
- 	const unsigned char *tzf;
-+	char *memmap = NULL;
-+	size_t maplen;
- 	timelib_tzinfo *tmp;
- 	int version;
- 	int transitions_result, types_result;
-@@ -669,7 +1233,7 @@ timelib_tzinfo *timelib_parse_tzfile(const char *timezone, const timelib_tzdb *t
- 
- 	*error_code = TIMELIB_ERROR_NO_ERROR;
- 
--	if (seek_to_tz_position(&tzf, timezone, tzdb)) {
-+	if (seek_to_tz_position(&tzf, timezone, &memmap, &maplen, tzdb)) {
- 		tmp = timelib_tzinfo_ctor(timezone);
- 
- 		version = read_preamble(&tzf, tmp, &type);
-@@ -712,11 +1276,38 @@ timelib_tzinfo *timelib_parse_tzfile(const char *timezone, const timelib_tzdb *t
- 			return NULL;
- 		}
- 
-+#ifdef HAVE_SYSTEM_TZDATA
-+		if (memmap) {
-+			const struct location_info *li;
-+
-+			/* TZif-style - grok the location info from the system database,
-+			 * if possible. */
-+
-+			if ((li = find_zone_info(system_location_table, timezone)) != NULL) {
-+				tmp->location.comments = timelib_strdup(li->comment);
-+				strncpy(tmp->location.country_code, li->code, 2);
-+				tmp->location.longitude = li->longitude;
-+				tmp->location.latitude = li->latitude;
-+				tmp->bc = 1;
-+			}
-+			else {
-+				set_default_location_and_comments(&tzf, tmp);
-+			}
-+
-+			/* Now done with the mmap segment - discard it. */
-+			if (memmap != internal_utc) {
-+				munmap(memmap, maplen);
-+			}
-+		} else {
-+#endif
- 		if (type == TIMELIB_TZINFO_PHP) {
- 			read_location(&tzf, tmp);
- 		} else {
- 			set_default_location_and_comments(&tzf, tmp);
- 		}
-+#ifdef HAVE_SYSTEM_TZDATA
-+		}
-+#endif
- 	} else {
- 		*error_code = TIMELIB_ERROR_NO_SUCH_TIMEZONE;
- 		tmp = NULL;
-diff --git a/ext/date/php_date.c b/ext/date/php_date.c
-index 48c82bf7ec..443299c089 100644
---- a/ext/date/php_date.c
-+++ b/ext/date/php_date.c
-@@ -490,7 +490,11 @@ PHP_MINFO_FUNCTION(date)
- 	php_info_print_table_row(2, "date/time support", "enabled");
- 	php_info_print_table_row(2, "timelib version", TIMELIB_ASCII_VERSION);
- 	php_info_print_table_row(2, "\"Olson\" Timezone Database Version", tzdb->version);
-+#ifdef HAVE_SYSTEM_TZDATA
-+	php_info_print_table_row(2, "Timezone Database", "system");
-+#else
- 	php_info_print_table_row(2, "Timezone Database", php_date_global_timezone_db_enabled ? "external" : "internal");
-+#endif
- 	php_info_print_table_row(2, "Default timezone", guess_timezone(tzdb));
- 	php_info_print_table_end();
-