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zend_virtual_cwd.c
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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2016 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <[email protected]> |
| Sascha Schumann <[email protected]> |
| Pierre Joye <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <stdio.h>
#include <limits.h>
#include <errno.h>
#include <stdlib.h>
#include <fcntl.h>
#include <time.h>
#include "zend.h"
#include "zend_virtual_cwd.h"
#include "tsrm_strtok_r.h"
#ifdef ZEND_WIN32
#include <io.h>
#include "tsrm_win32.h"
# ifndef IO_REPARSE_TAG_SYMLINK
# define IO_REPARSE_TAG_SYMLINK 0xA000000C
# endif
# ifndef IO_REPARSE_TAG_DEDUP
# define IO_REPARSE_TAG_DEDUP 0x80000013
# endif
# ifndef VOLUME_NAME_NT
# define VOLUME_NAME_NT 0x2
# endif
# ifndef VOLUME_NAME_DOS
# define VOLUME_NAME_DOS 0x0
# endif
#endif
#ifdef NETWARE
#include <fsio.h>
#endif
#ifndef HAVE_REALPATH
#define realpath(x,y) strcpy(y,x)
#endif
#define VIRTUAL_CWD_DEBUG 0
#include "TSRM.h"
/* Only need mutex for popen() in Windows and NetWare because it doesn't chdir() on UNIX */
#if (defined(ZEND_WIN32) || defined(NETWARE)) && defined(ZTS)
MUTEX_T cwd_mutex;
#endif
#ifdef ZTS
ts_rsrc_id cwd_globals_id;
#else
virtual_cwd_globals cwd_globals;
#endif
cwd_state main_cwd_state; /* True global */
#ifndef ZEND_WIN32
#include <unistd.h>
#else
#include <direct.h>
#endif
#ifdef ZEND_WIN32
#include <tchar.h>
#define tsrm_strtok_r(a,b,c) _tcstok((a),(b))
#define TOKENIZER_STRING "/\\"
static int php_check_dots(const char *element, int n)
{
while (n-- > 0) if (element[n] != '.') break;
return (n != -1);
}
#define IS_DIRECTORY_UP(element, len) \
(len >= 2 && !php_check_dots(element, len))
#define IS_DIRECTORY_CURRENT(element, len) \
(len == 1 && element[0] == '.')
#elif defined(NETWARE)
/* NetWare has strtok() (in LibC) and allows both slashes in paths, like Windows --
but rest of the stuff is like Unix */
/* strtok() call in LibC is abending when used in a different address space -- hence using
PHP's version itself for now */
/*#define tsrm_strtok_r(a,b,c) strtok((a),(b))*/
#define TOKENIZER_STRING "/\\"
#else
#define TOKENIZER_STRING "/"
#endif
/* default macros */
#ifndef IS_DIRECTORY_UP
#define IS_DIRECTORY_UP(element, len) \
(len == 2 && element[0] == '.' && element[1] == '.')
#endif
#ifndef IS_DIRECTORY_CURRENT
#define IS_DIRECTORY_CURRENT(element, len) \
(len == 1 && element[0] == '.')
#endif
/* define this to check semantics */
#define IS_DIR_OK(s) (1)
#ifndef IS_DIR_OK
#define IS_DIR_OK(state) (php_is_dir_ok(state) == 0)
#endif
#define CWD_STATE_COPY(d, s) \
(d)->cwd_length = (s)->cwd_length; \
(d)->cwd = (char *) emalloc((s)->cwd_length+1); \
memcpy((d)->cwd, (s)->cwd, (s)->cwd_length+1);
#define CWD_STATE_FREE(s) \
efree((s)->cwd);
#ifdef ZEND_WIN32
# define CWD_STATE_FREE_ERR(state) do { \
DWORD last_error = GetLastError(); \
CWD_STATE_FREE(state); \
SetLastError(last_error); \
} while (0)
#else
# define CWD_STATE_FREE_ERR(state) CWD_STATE_FREE(state)
#endif
#ifdef ZEND_WIN32
#ifdef CTL_CODE
#undef CTL_CODE
#endif
#define CTL_CODE(DeviceType,Function,Method,Access) (((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2) | (Method))
#define FILE_DEVICE_FILE_SYSTEM 0x00000009
#define METHOD_BUFFERED 0
#define FILE_ANY_ACCESS 0
#define FSCTL_GET_REPARSE_POINT CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 42, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define MAXIMUM_REPARSE_DATA_BUFFER_SIZE ( 16 * 1024 )
typedef struct {
unsigned long ReparseTag;
unsigned short ReparseDataLength;
unsigned short Reserved;
union {
struct {
unsigned short SubstituteNameOffset;
unsigned short SubstituteNameLength;
unsigned short PrintNameOffset;
unsigned short PrintNameLength;
unsigned long Flags;
wchar_t ReparseTarget[1];
} SymbolicLinkReparseBuffer;
struct {
unsigned short SubstituteNameOffset;
unsigned short SubstituteNameLength;
unsigned short PrintNameOffset;
unsigned short PrintNameLength;
wchar_t ReparseTarget[1];
} MountPointReparseBuffer;
struct {
unsigned char ReparseTarget[1];
} GenericReparseBuffer;
};
} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
#define SECS_BETWEEN_EPOCHS (__int64)11644473600
#define SECS_TO_100NS (__int64)10000000
static inline time_t FileTimeToUnixTime(const FILETIME *FileTime)
{
__int64 UnixTime;
long *nsec = NULL;
SYSTEMTIME SystemTime;
FileTimeToSystemTime(FileTime, &SystemTime);
UnixTime = ((__int64)FileTime->dwHighDateTime << 32) +
FileTime->dwLowDateTime;
UnixTime -= (SECS_BETWEEN_EPOCHS * SECS_TO_100NS);
if (nsec) {
*nsec = (UnixTime % SECS_TO_100NS) * (__int64)100;
}
UnixTime /= SECS_TO_100NS; /* now convert to seconds */
if ((time_t)UnixTime != UnixTime) {
UnixTime = 0;
}
return (time_t)UnixTime;
}
CWD_API int php_sys_readlink(const char *link, char *target, size_t target_len){ /* {{{ */
HANDLE hFile;
DWORD dwRet;
wchar_t *linkw = php_win32_ioutil_any_to_w(link), targetw[MAXPATHLEN];
size_t _tmp_len;
char *_tmp;
if (!linkw) {
return -1;
}
if (!target_len) {
free(linkw);
return -1;
}
hFile = CreateFileW(linkw, // file to open
GENERIC_READ, // open for reading
FILE_SHARE_READ, // share for reading
NULL, // default security
OPEN_EXISTING, // existing file only
FILE_FLAG_BACKUP_SEMANTICS, // normal file
NULL); // no attr. template
if( hFile == INVALID_HANDLE_VALUE) {
free(linkw);
return -1;
}
/* Despite MSDN has documented it won't to, the length returned by
GetFinalPathNameByHandleA includes the length of the
null terminator. This behavior is at least reproducible
with VS2012 and earlier, and seems not to be fixed till
now. Thus, correcting target_len so it's suddenly don't
overflown. */
dwRet = GetFinalPathNameByHandleW(hFile, targetw, MAXPATHLEN, VOLUME_NAME_DOS);
if(dwRet >= target_len || dwRet >= MAXPATHLEN || dwRet == 0) {
free(linkw);
CloseHandle(hFile);
return -1;
}
_tmp = php_win32_ioutil_conv_w_to_any(targetw, dwRet, &_tmp_len);
if (!_tmp || _tmp_len >= MAXPATHLEN) {
CloseHandle(hFile);
free(linkw);
return -1;
}
memcpy(target, _tmp, _tmp_len);
free(_tmp);
CloseHandle(hFile);
free(linkw);
if(dwRet > 4) {
/* Skip first 4 characters if they are "\??\" */
if(target[0] == '\\' && target[1] == '\\' && target[2] == '?' && target[3] == '\\') {
char tmp[MAXPATHLEN];
unsigned int offset = 4;
dwRet -= 4;
/* \??\UNC\ */
if (dwRet > 7 && target[4] == 'U' && target[5] == 'N' && target[6] == 'C') {
offset += 2;
dwRet -= 2;
target[offset] = '\\';
}
memcpy(tmp, target + offset, dwRet);
memcpy(target, tmp, dwRet);
}
}
target[dwRet] = '\0';
return dwRet;
}
/* }}} */
CWD_API int php_sys_stat_ex(const char *path, zend_stat_t *buf, int lstat) /* {{{ */
{
WIN32_FILE_ATTRIBUTE_DATA data;
LARGE_INTEGER t;
const size_t path_len = strlen(path);
wchar_t *pathw = php_win32_ioutil_any_to_w(path);
ALLOCA_FLAG(use_heap_large)
if (!pathw) {
return -1;
}
if (!GetFileAttributesExW(pathw, GetFileExInfoStandard, &data)) {
int ret;
#if ZEND_ENABLE_ZVAL_LONG64
ret = _wstat64(pathw, buf);
#else
ret = _wstat(pathw, (struct _stat32 *)buf);
#endif
free(pathw);
return ret;
}
if (path_len >= 1 && path[1] == ':') {
if (path[0] >= 'A' && path[0] <= 'Z') {
buf->st_dev = buf->st_rdev = path[0] - 'A';
} else {
buf->st_dev = buf->st_rdev = path[0] - 'a';
}
} else if (IS_UNC_PATH(path, path_len)) {
buf->st_dev = buf->st_rdev = 0;
} else {
wchar_t cur_path[MAXPATHLEN+1];
if (NULL != _wgetcwd(cur_path, sizeof(cur_path)/sizeof(wchar_t))) {
if (cur_path[1] == L':') {
if (pathw[0] >= L'A' && pathw[0] <= L'Z') {
buf->st_dev = buf->st_rdev = pathw[0] - L'A';
} else {
buf->st_dev = buf->st_rdev = pathw[0] - L'a';
}
} else {
buf->st_dev = buf->st_rdev = -1;
}
} else {
buf->st_dev = buf->st_rdev = -1;
}
}
buf->st_uid = buf->st_gid = buf->st_ino = 0;
if (lstat && data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
/* File is a reparse point. Get the target */
HANDLE hLink = NULL;
REPARSE_DATA_BUFFER * pbuffer;
DWORD retlength = 0;
hLink = CreateFileW(pathw, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT|FILE_FLAG_BACKUP_SEMANTICS, NULL);
if(hLink == INVALID_HANDLE_VALUE) {
free(pathw);
return -1;
}
pbuffer = (REPARSE_DATA_BUFFER *)do_alloca(MAXIMUM_REPARSE_DATA_BUFFER_SIZE, use_heap_large);
if(!DeviceIoControl(hLink, FSCTL_GET_REPARSE_POINT, NULL, 0, pbuffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &retlength, NULL)) {
free_alloca(pbuffer, use_heap_large);
CloseHandle(hLink);
free(pathw);
return -1;
}
CloseHandle(hLink);
if(pbuffer->ReparseTag == IO_REPARSE_TAG_SYMLINK) {
buf->st_mode = S_IFLNK;
buf->st_mode |= (data.dwFileAttributes & FILE_ATTRIBUTE_READONLY) ? (S_IREAD|(S_IREAD>>3)|(S_IREAD>>6)) : (S_IREAD|(S_IREAD>>3)|(S_IREAD>>6)|S_IWRITE|(S_IWRITE>>3)|(S_IWRITE>>6));
}
#if 0 /* Not used yet */
else if(pbuffer->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) {
buf->st_mode |=;
}
#endif
free_alloca(pbuffer, use_heap_large);
} else {
buf->st_mode = (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? (S_IFDIR|S_IEXEC|(S_IEXEC>>3)|(S_IEXEC>>6)) : S_IFREG;
buf->st_mode |= (data.dwFileAttributes & FILE_ATTRIBUTE_READONLY) ? (S_IREAD|(S_IREAD>>3)|(S_IREAD>>6)) : (S_IREAD|(S_IREAD>>3)|(S_IREAD>>6)|S_IWRITE|(S_IWRITE>>3)|(S_IWRITE>>6));
}
if ((data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0) {
size_t len = strlen(path);
if (path[len-4] == '.') {
if (_memicmp(path+len-3, "exe", 3) == 0 ||
_memicmp(path+len-3, "com", 3) == 0 ||
_memicmp(path+len-3, "bat", 3) == 0 ||
_memicmp(path+len-3, "cmd", 3) == 0) {
buf->st_mode |= (S_IEXEC|(S_IEXEC>>3)|(S_IEXEC>>6));
}
}
}
buf->st_nlink = 1;
t.HighPart = data.nFileSizeHigh;
t.LowPart = data.nFileSizeLow;
/* It's an overflow on 32 bit, however it won't fix as long
as zend_long is 32 bit. */
buf->st_size = (zend_long)t.QuadPart;
buf->st_atime = FileTimeToUnixTime(&data.ftLastAccessTime);
buf->st_ctime = FileTimeToUnixTime(&data.ftCreationTime);
buf->st_mtime = FileTimeToUnixTime(&data.ftLastWriteTime);
free(pathw);
return 0;
}
/* }}} */
#endif
static int php_is_dir_ok(const cwd_state *state) /* {{{ */
{
zend_stat_t buf;
if (php_sys_stat(state->cwd, &buf) == 0 && S_ISDIR(buf.st_mode))
return (0);
return (1);
}
/* }}} */
static int php_is_file_ok(const cwd_state *state) /* {{{ */
{
zend_stat_t buf;
if (php_sys_stat(state->cwd, &buf) == 0 && S_ISREG(buf.st_mode))
return (0);
return (1);
}
/* }}} */
static void cwd_globals_ctor(virtual_cwd_globals *cwd_g) /* {{{ */
{
CWD_STATE_COPY(&cwd_g->cwd, &main_cwd_state);
cwd_g->realpath_cache_size = 0;
cwd_g->realpath_cache_size_limit = REALPATH_CACHE_SIZE;
cwd_g->realpath_cache_ttl = REALPATH_CACHE_TTL;
memset(cwd_g->realpath_cache, 0, sizeof(cwd_g->realpath_cache));
}
/* }}} */
static void cwd_globals_dtor(virtual_cwd_globals *cwd_g) /* {{{ */
{
realpath_cache_clean();
}
/* }}} */
CWD_API void virtual_cwd_startup(void) /* {{{ */
{
char cwd[MAXPATHLEN];
char *result;
#ifdef NETWARE
result = getcwdpath(cwd, NULL, 1);
if(result)
{
char *c=cwd;
while(c = strchr(c, '\\'))
{
*c='/';
++c;
}
}
#else
#ifdef ZEND_WIN32
ZeroMemory(&cwd, sizeof(cwd));
#endif
result = getcwd(cwd, sizeof(cwd));
#endif
if (!result) {
cwd[0] = '\0';
}
main_cwd_state.cwd_length = (int)strlen(cwd);
#ifdef ZEND_WIN32
if (main_cwd_state.cwd_length >= 2 && cwd[1] == ':') {
cwd[0] = toupper(cwd[0]);
}
#endif
main_cwd_state.cwd = strdup(cwd);
#ifdef ZTS
ts_allocate_id(&cwd_globals_id, sizeof(virtual_cwd_globals), (ts_allocate_ctor) cwd_globals_ctor, (ts_allocate_dtor) cwd_globals_dtor);
#else
cwd_globals_ctor(&cwd_globals);
#endif
#if (defined(ZEND_WIN32) || defined(NETWARE)) && defined(ZTS)
cwd_mutex = tsrm_mutex_alloc();
#endif
}
/* }}} */
CWD_API void virtual_cwd_shutdown(void) /* {{{ */
{
#ifndef ZTS
cwd_globals_dtor(&cwd_globals);
#endif
#if (defined(ZEND_WIN32) || defined(NETWARE)) && defined(ZTS)
tsrm_mutex_free(cwd_mutex);
#endif
free(main_cwd_state.cwd); /* Don't use CWD_STATE_FREE because the non global states will probably use emalloc()/efree() */
}
/* }}} */
CWD_API int virtual_cwd_activate(void) /* {{{ */
{
if (CWDG(cwd).cwd == NULL) {
CWD_STATE_COPY(&CWDG(cwd), &main_cwd_state);
}
return 0;
}
/* }}} */
CWD_API int virtual_cwd_deactivate(void) /* {{{ */
{
if (CWDG(cwd).cwd != NULL) {
CWD_STATE_FREE(&CWDG(cwd));
CWDG(cwd).cwd = NULL;
}
return 0;
}
/* }}} */
CWD_API char *virtual_getcwd_ex(size_t *length) /* {{{ */
{
cwd_state *state;
state = &CWDG(cwd);
if (state->cwd_length == 0) {
char *retval;
*length = 1;
retval = (char *) emalloc(2);
if (retval == NULL) {
return NULL;
}
retval[0] = DEFAULT_SLASH;
retval[1] = '\0';
return retval;
}
#ifdef ZEND_WIN32
/* If we have something like C: */
if (state->cwd_length == 2 && state->cwd[state->cwd_length-1] == ':') {
char *retval;
*length = state->cwd_length+1;
retval = (char *) emalloc(*length+1);
if (retval == NULL) {
return NULL;
}
memcpy(retval, state->cwd, *length);
retval[0] = toupper(retval[0]);
retval[*length-1] = DEFAULT_SLASH;
retval[*length] = '\0';
return retval;
}
#endif
if (!state->cwd) {
*length = 0;
return NULL;
}
*length = state->cwd_length;
return estrdup(state->cwd);
}
/* }}} */
/* Same semantics as UNIX getcwd() */
CWD_API char *virtual_getcwd(char *buf, size_t size) /* {{{ */
{
size_t length;
char *cwd;
cwd = virtual_getcwd_ex(&length);
if (buf == NULL) {
return cwd;
}
if (length > size-1) {
efree(cwd);
errno = ERANGE; /* Is this OK? */
return NULL;
}
if (!cwd) {
return NULL;
}
memcpy(buf, cwd, length+1);
efree(cwd);
return buf;
}
/* }}} */
#ifdef ZEND_WIN32
static inline zend_ulong realpath_cache_key(const char *path, int path_len) /* {{{ */
{
register zend_ulong h;
char *bucket_key_start = tsrm_win32_get_path_sid_key(path);
char *bucket_key = (char *)bucket_key_start;
const char *e;
if (!bucket_key) {
return 0;
}
e = bucket_key + strlen(bucket_key);
for (h = Z_UL(2166136261); bucket_key < e;) {
h *= Z_UL(16777619);
h ^= *bucket_key++;
}
HeapFree(GetProcessHeap(), 0, (LPVOID)bucket_key_start);
return h;
}
/* }}} */
#else
static inline zend_ulong realpath_cache_key(const char *path, int path_len) /* {{{ */
{
register zend_ulong h;
const char *e = path + path_len;
for (h = Z_UL(2166136261); path < e;) {
h *= Z_UL(16777619);
h ^= *path++;
}
return h;
}
/* }}} */
#endif /* defined(ZEND_WIN32) */
CWD_API void realpath_cache_clean(void) /* {{{ */
{
uint32_t i;
for (i = 0; i < sizeof(CWDG(realpath_cache))/sizeof(CWDG(realpath_cache)[0]); i++) {
realpath_cache_bucket *p = CWDG(realpath_cache)[i];
while (p != NULL) {
realpath_cache_bucket *r = p;
p = p->next;
free(r);
}
CWDG(realpath_cache)[i] = NULL;
}
CWDG(realpath_cache_size) = 0;
}
/* }}} */
CWD_API void realpath_cache_del(const char *path, int path_len) /* {{{ */
{
zend_ulong key = realpath_cache_key(path, path_len);
zend_ulong n = key % (sizeof(CWDG(realpath_cache)) / sizeof(CWDG(realpath_cache)[0]));
realpath_cache_bucket **bucket = &CWDG(realpath_cache)[n];
while (*bucket != NULL) {
if (key == (*bucket)->key && path_len == (*bucket)->path_len &&
memcmp(path, (*bucket)->path, path_len) == 0) {
realpath_cache_bucket *r = *bucket;
*bucket = (*bucket)->next;
/* if the pointers match then only subtract the length of the path */
if(r->path == r->realpath) {
CWDG(realpath_cache_size) -= sizeof(realpath_cache_bucket) + r->path_len + 1;
} else {
CWDG(realpath_cache_size) -= sizeof(realpath_cache_bucket) + r->path_len + 1 + r->realpath_len + 1;
}
free(r);
return;
} else {
bucket = &(*bucket)->next;
}
}
}
/* }}} */
static inline void realpath_cache_add(const char *path, int path_len, const char *realpath, int realpath_len, int is_dir, time_t t) /* {{{ */
{
zend_long size = sizeof(realpath_cache_bucket) + path_len + 1;
int same = 1;
if (realpath_len != path_len ||
memcmp(path, realpath, path_len) != 0) {
size += realpath_len + 1;
same = 0;
}
if (CWDG(realpath_cache_size) + size <= CWDG(realpath_cache_size_limit)) {
realpath_cache_bucket *bucket = malloc(size);
zend_ulong n;
if (bucket == NULL) {
return;
}
bucket->key = realpath_cache_key(path, path_len);
bucket->path = (char*)bucket + sizeof(realpath_cache_bucket);
memcpy(bucket->path, path, path_len+1);
bucket->path_len = path_len;
if (same) {
bucket->realpath = bucket->path;
} else {
bucket->realpath = bucket->path + (path_len + 1);
memcpy(bucket->realpath, realpath, realpath_len+1);
}
bucket->realpath_len = realpath_len;
bucket->is_dir = is_dir;
#ifdef ZEND_WIN32
bucket->is_rvalid = 0;
bucket->is_readable = 0;
bucket->is_wvalid = 0;
bucket->is_writable = 0;
#endif
bucket->expires = t + CWDG(realpath_cache_ttl);
n = bucket->key % (sizeof(CWDG(realpath_cache)) / sizeof(CWDG(realpath_cache)[0]));
bucket->next = CWDG(realpath_cache)[n];
CWDG(realpath_cache)[n] = bucket;
CWDG(realpath_cache_size) += size;
}
}
/* }}} */
static inline realpath_cache_bucket* realpath_cache_find(const char *path, int path_len, time_t t) /* {{{ */
{
zend_ulong key = realpath_cache_key(path, path_len);
zend_ulong n = key % (sizeof(CWDG(realpath_cache)) / sizeof(CWDG(realpath_cache)[0]));
realpath_cache_bucket **bucket = &CWDG(realpath_cache)[n];
while (*bucket != NULL) {
if (CWDG(realpath_cache_ttl) && (*bucket)->expires < t) {
realpath_cache_bucket *r = *bucket;
*bucket = (*bucket)->next;
/* if the pointers match then only subtract the length of the path */
if(r->path == r->realpath) {
CWDG(realpath_cache_size) -= sizeof(realpath_cache_bucket) + r->path_len + 1;
} else {
CWDG(realpath_cache_size) -= sizeof(realpath_cache_bucket) + r->path_len + 1 + r->realpath_len + 1;
}
free(r);
} else if (key == (*bucket)->key && path_len == (*bucket)->path_len &&
memcmp(path, (*bucket)->path, path_len) == 0) {
return *bucket;
} else {
bucket = &(*bucket)->next;
}
}
return NULL;
}
/* }}} */
CWD_API realpath_cache_bucket* realpath_cache_lookup(const char *path, int path_len, time_t t) /* {{{ */
{
return realpath_cache_find(path, path_len, t);
}
/* }}} */
CWD_API zend_long realpath_cache_size(void)
{
return CWDG(realpath_cache_size);
}
CWD_API zend_long realpath_cache_max_buckets(void)
{
return (sizeof(CWDG(realpath_cache)) / sizeof(CWDG(realpath_cache)[0]));
}
CWD_API realpath_cache_bucket** realpath_cache_get_buckets(void)
{
return CWDG(realpath_cache);
}
#undef LINK_MAX
#define LINK_MAX 32
static int tsrm_realpath_r(char *path, int start, int len, int *ll, time_t *t, int use_realpath, int is_dir, int *link_is_dir) /* {{{ */
{
int i, j, save;
int directory = 0;
#ifdef ZEND_WIN32
WIN32_FIND_DATAW dataw;
HANDLE hFind = INVALID_HANDLE_VALUE;
ALLOCA_FLAG(use_heap_large)
wchar_t *pathw = NULL;
#define FREE_PATHW() \
do { free(pathw); } while(0);
#else
zend_stat_t st;
#endif
realpath_cache_bucket *bucket;
char *tmp;
ALLOCA_FLAG(use_heap)
while (1) {
if (len <= start) {
if (link_is_dir) {
*link_is_dir = 1;
}
return start;
}
i = len;
while (i > start && !IS_SLASH(path[i-1])) {
i--;
}
if (i == len ||
(i == len - 1 && path[i] == '.')) {
/* remove double slashes and '.' */
len = i - 1;
is_dir = 1;
continue;
} else if (i == len - 2 && path[i] == '.' && path[i+1] == '.') {
/* remove '..' and previous directory */
is_dir = 1;
if (link_is_dir) {
*link_is_dir = 1;
}
if (i - 1 <= start) {
return start ? start : len;
}
j = tsrm_realpath_r(path, start, i-1, ll, t, use_realpath, 1, NULL);
if (j > start) {
j--;
while (j > start && !IS_SLASH(path[j])) {
j--;
}
if (!start) {
/* leading '..' must not be removed in case of relative path */
if (j == 0 && path[0] == '.' && path[1] == '.' &&
IS_SLASH(path[2])) {
path[3] = '.';
path[4] = '.';
path[5] = DEFAULT_SLASH;
j = 5;
} else if (j > 0 &&
path[j+1] == '.' && path[j+2] == '.' &&
IS_SLASH(path[j+3])) {
j += 4;
path[j++] = '.';
path[j++] = '.';
path[j] = DEFAULT_SLASH;
}
}
} else if (!start && !j) {
/* leading '..' must not be removed in case of relative path */
path[0] = '.';
path[1] = '.';
path[2] = DEFAULT_SLASH;
j = 2;
}
return j;
}
path[len] = 0;
save = (use_realpath != CWD_EXPAND);
if (start && save && CWDG(realpath_cache_size_limit)) {
/* cache lookup for absolute path */
if (!*t) {
*t = time(0);
}
if ((bucket = realpath_cache_find(path, len, *t)) != NULL) {
if (is_dir && !bucket->is_dir) {
/* not a directory */
return -1;
} else {
if (link_is_dir) {
*link_is_dir = bucket->is_dir;
}
memcpy(path, bucket->realpath, bucket->realpath_len + 1);
return bucket->realpath_len;
}
}
}
#ifdef ZEND_WIN32
if (save) {
pathw = php_win32_ioutil_any_to_w(path);
if (!pathw) {
return -1;
}
hFind = FindFirstFileW(pathw, &dataw);
if (INVALID_HANDLE_VALUE == hFind) {
if (use_realpath == CWD_REALPATH) {
/* file not found */
FREE_PATHW()
return -1;
}
/* continue resolution anyway but don't save result in the cache */
save = 0;
} else {
FindClose(hFind);
}
}
tmp = do_alloca(len+1, use_heap);
memcpy(tmp, path, len+1);
if(save &&
!(IS_UNC_PATH(path, len) && len >= 3 && path[2] != '?') &&
(dataw.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
) {
/* File is a reparse point. Get the target */
HANDLE hLink = NULL;
REPARSE_DATA_BUFFER * pbuffer;
DWORD retlength = 0;
int bufindex = 0, isabsolute = 0;
wchar_t * reparsetarget;
BOOL isVolume = FALSE;
char *printname = NULL, *substitutename = NULL;
int substitutename_len;
int substitutename_off = 0;
if(++(*ll) > LINK_MAX) {
free_alloca(tmp, use_heap);
FREE_PATHW()
return -1;
}
hLink = CreateFileW(pathw, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT|FILE_FLAG_BACKUP_SEMANTICS, NULL);
if(hLink == INVALID_HANDLE_VALUE) {
free_alloca(tmp, use_heap);
FREE_PATHW()
return -1;
}
pbuffer = (REPARSE_DATA_BUFFER *)do_alloca(MAXIMUM_REPARSE_DATA_BUFFER_SIZE, use_heap_large);
if (pbuffer == NULL) {
CloseHandle(hLink);
free_alloca(tmp, use_heap);
FREE_PATHW()
return -1;
}
if(!DeviceIoControl(hLink, FSCTL_GET_REPARSE_POINT, NULL, 0, pbuffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &retlength, NULL)) {
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
CloseHandle(hLink);
FREE_PATHW()
return -1;
}
CloseHandle(hLink);
if(pbuffer->ReparseTag == IO_REPARSE_TAG_SYMLINK) {
reparsetarget = pbuffer->SymbolicLinkReparseBuffer.ReparseTarget;
isabsolute = (pbuffer->SymbolicLinkReparseBuffer.Flags == 0) ? 1 : 0;
printname = php_win32_ioutil_w_to_any(reparsetarget + pbuffer->MountPointReparseBuffer.PrintNameOffset / sizeof(WCHAR));
if (!printname) {
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
FREE_PATHW()
return -1;
}
substitutename_len = pbuffer->MountPointReparseBuffer.SubstituteNameLength / sizeof(WCHAR);
substitutename = php_win32_ioutil_w_to_any(reparsetarget + pbuffer->MountPointReparseBuffer.SubstituteNameOffset / sizeof(WCHAR));
if (!substitutename) {
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
free(printname);
FREE_PATHW()
return -1;
}
}
else if(pbuffer->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) {
isabsolute = 1;
reparsetarget = pbuffer->MountPointReparseBuffer.ReparseTarget;
printname = php_win32_ioutil_w_to_any(reparsetarget + pbuffer->MountPointReparseBuffer.PrintNameOffset / sizeof(WCHAR));
if (!printname) {
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
FREE_PATHW()
return -1;
}
substitutename_len = pbuffer->MountPointReparseBuffer.SubstituteNameLength / sizeof(WCHAR);
substitutename = php_win32_ioutil_w_to_any(reparsetarget + pbuffer->MountPointReparseBuffer.SubstituteNameOffset / sizeof(WCHAR));
if (!substitutename) {
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
free(printname);
FREE_PATHW()
return -1;
}
}
else if (pbuffer->ReparseTag == IO_REPARSE_TAG_DEDUP) {