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zend_virtual_cwd.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) 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]> |
+----------------------------------------------------------------------+
*/
#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"
#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 IO_REPARSE_TAG_CLOUD
# define IO_REPARSE_TAG_CLOUD (0x9000001AL)
# endif
/* IO_REPARSE_TAG_CLOUD_1 through IO_REPARSE_TAG_CLOUD_F have values of 0x9000101AL
to 0x9000F01AL, they can be checked against the mask. */
#ifndef IO_REPARSE_TAG_CLOUD_MASK
#define IO_REPARSE_TAG_CLOUD_MASK (0x0000F000L)
#endif
#ifndef IO_REPARSE_TAG_ONEDRIVE
#define IO_REPARSE_TAG_ONEDRIVE (0x80000021L)
#endif
# ifndef IO_REPARSE_TAG_ACTIVISION_HSM
# define IO_REPARSE_TAG_ACTIVISION_HSM (0x00000047L)
# endif
# ifndef IO_REPARSE_TAG_PROJFS
# define IO_REPARSE_TAG_PROJFS (0x9000001CL)
# endif
# ifndef VOLUME_NAME_NT
# define VOLUME_NAME_NT 0x2
# endif
# ifndef VOLUME_NAME_DOS
# define VOLUME_NAME_DOS 0x0
# endif
# include <winioctl.h>
# include <winnt.h>
#endif
#define VIRTUAL_CWD_DEBUG 0
#include "TSRM.h"
/* Only need mutex for popen() in Windows because it doesn't chdir() on UNIX */
#if defined(ZEND_WIN32) && defined(ZTS)
MUTEX_T cwd_mutex;
#endif
#ifdef ZTS
ts_rsrc_id cwd_globals_id;
size_t cwd_globals_offset;
#else
virtual_cwd_globals cwd_globals;
#endif
static cwd_state main_cwd_state; /* True global */
#ifndef ZEND_WIN32
#include <unistd.h>
#else
#include <direct.h>
#include "zend_globals.h"
#include "zend_globals_macros.h"
#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); \
(s)->cwd_length = 0;
#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
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 realpath_cache_clean_helper(uint32_t max_entries, realpath_cache_bucket **cache, zend_long *cache_size)
{
uint32_t i;
for (i = 0; i < max_entries; i++) {
realpath_cache_bucket *p = cache[i];
while (p != NULL) {
realpath_cache_bucket *r = p;
p = p->next;
free(r);
}
cache[i] = NULL;
}
*cache_size = 0;
}
static void cwd_globals_dtor(virtual_cwd_globals *cwd_g) /* {{{ */
{
realpath_cache_clean_helper(sizeof(cwd_g->realpath_cache)/sizeof(cwd_g->realpath_cache[0]), cwd_g->realpath_cache, &cwd_g->realpath_cache_size);
}
/* }}} */
void virtual_cwd_main_cwd_init(uint8_t reinit) /* {{{ */
{
char cwd[MAXPATHLEN];
char *result;
if (reinit) {
free(main_cwd_state.cwd);
}
#ifdef ZEND_WIN32
ZeroMemory(&cwd, sizeof(cwd));
result = php_win32_ioutil_getcwd(cwd, sizeof(cwd));
#else
result = getcwd(cwd, sizeof(cwd));
#endif
if (!result) {
cwd[0] = '\0';
}
main_cwd_state.cwd_length = 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);
}
/* }}} */
CWD_API void virtual_cwd_startup(void) /* {{{ */
{
virtual_cwd_main_cwd_init(0);
#ifdef ZTS
ts_allocate_fast_id(&cwd_globals_id, &cwd_globals_offset, 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(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(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);
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);
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, size_t path_len) /* {{{ */
{
register zend_ulong h;
size_t bucket_key_len;
const char *bucket_key_start = tsrm_win32_get_path_sid_key(path, path_len, &bucket_key_len);
const char *bucket_key = bucket_key_start;
const char *e;
if (!bucket_key) {
return 0;
}
e = bucket_key + bucket_key_len;
for (h = Z_UL(2166136261); bucket_key < e;) {
h *= Z_UL(16777619);
h ^= *bucket_key++;
}
if (bucket_key_start != path) {
HeapFree(GetProcessHeap(), 0, (LPVOID)bucket_key_start);
}
return h;
}
/* }}} */
#else
static inline zend_ulong realpath_cache_key(const char *path, size_t 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) /* {{{ */
{
realpath_cache_clean_helper(sizeof(CWDG(realpath_cache))/sizeof(CWDG(realpath_cache)[0]), CWDG(realpath_cache), &CWDG(realpath_cache_size));
}
/* }}} */
CWD_API void realpath_cache_del(const char *path, size_t 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, size_t path_len, const char *realpath, size_t 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 > 0;
#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, size_t 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, size_t 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 size_t tsrm_realpath_r(char *path, size_t start, size_t len, int *ll, time_t *t, int use_realpath, bool is_dir, int *link_is_dir) /* {{{ */
{
size_t i, j;
int directory = 0, save;
#ifdef ZEND_WIN32
WIN32_FIND_DATAW dataw;
HANDLE hFind = INVALID_HANDLE_VALUE;
ALLOCA_FLAG(use_heap_large)
wchar_t *pathw = NULL;
int may_retry_reparse_point;
#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--;
}
assert(i < MAXPATHLEN);
if (i == len ||
(i + 1 == len && path[i] == '.')) {
/* remove double slashes and '.' */
len = EXPECTED(i > 0) ? i - 1 : 0;
is_dir = 1;
continue;
} else if (i + 2 == len && path[i] == '.' && path[i+1] == '.') {
/* remove '..' and previous directory */
is_dir = 1;
if (link_is_dir) {
*link_is_dir = 1;
}
if (i <= start + 1) {
return start ? start : len;
}
j = tsrm_realpath_r(path, start, i-1, ll, t, use_realpath, 1, NULL);
if (j > start && j != (size_t)-1) {
j--;
assert(i < MAXPATHLEN);
while (j > start && !IS_SLASH(path[j])) {
j--;
}
assert(i < MAXPATHLEN);
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 (size_t)-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
retry_reparse_point:
may_retry_reparse_point = 0;
if (save) {
pathw = php_win32_ioutil_any_to_w(path);
if (!pathw) {
return (size_t)-1;
}
hFind = FindFirstFileExW(pathw, FindExInfoBasic, &dataw, FindExSearchNameMatch, NULL, 0);
if (INVALID_HANDLE_VALUE == hFind) {
if (use_realpath == CWD_REALPATH) {
/* file not found */
FREE_PATHW()
return (size_t)-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);
retry_reparse_tag_cloud:
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;
PHP_WIN32_IOUTIL_REPARSE_DATA_BUFFER * pbuffer;
DWORD retlength = 0;
size_t bufindex = 0;
uint8_t isabsolute = 0;
wchar_t * reparsetarget;
BOOL isVolume = FALSE;
#if VIRTUAL_CWD_DEBUG
char *printname = NULL;
#endif
char *substitutename = NULL;
size_t substitutename_len;
size_t substitutename_off = 0;
wchar_t tmpsubstname[MAXPATHLEN];
if(++(*ll) > LINK_MAX) {
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
hLink = CreateFileW(pathw,
0,
PHP_WIN32_IOUTIL_DEFAULT_SHARE_MODE,
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 (size_t)-1;
}
pbuffer = (PHP_WIN32_IOUTIL_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 (size_t)-1;
}
if(!DeviceIoControl(hLink, FSCTL_GET_REPARSE_POINT, NULL, 0, pbuffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &retlength, NULL)) {
BY_HANDLE_FILE_INFORMATION fileInformation;
free_alloca(pbuffer, use_heap_large);
if ((dataw.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
(dataw.dwReserved0 & ~IO_REPARSE_TAG_CLOUD_MASK) == IO_REPARSE_TAG_CLOUD &&
EG(windows_version_info).dwMajorVersion >= 10 &&
EG(windows_version_info).dwMinorVersion == 0 &&
EG(windows_version_info).dwBuildNumber >= 18362 &&
GetFileInformationByHandle(hLink, &fileInformation) &&
!(fileInformation.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
dataw.dwFileAttributes = fileInformation.dwFileAttributes;
CloseHandle(hLink);
(*ll)--;
goto retry_reparse_tag_cloud;
}
free_alloca(tmp, use_heap);
CloseHandle(hLink);
FREE_PATHW()
return (size_t)-1;
}
CloseHandle(hLink);
if(pbuffer->ReparseTag == IO_REPARSE_TAG_SYMLINK) {
may_retry_reparse_point = 1;
reparsetarget = pbuffer->SymbolicLinkReparseBuffer.ReparseTarget;
isabsolute = pbuffer->SymbolicLinkReparseBuffer.Flags == 0;
#if VIRTUAL_CWD_DEBUG
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 (size_t)-1;
}
#endif
substitutename_len = pbuffer->MountPointReparseBuffer.SubstituteNameLength / sizeof(WCHAR);
if (substitutename_len >= MAXPATHLEN) {
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
memmove(tmpsubstname, reparsetarget + pbuffer->MountPointReparseBuffer.SubstituteNameOffset / sizeof(WCHAR), pbuffer->MountPointReparseBuffer.SubstituteNameLength);
tmpsubstname[substitutename_len] = L'\0';
substitutename = php_win32_cp_conv_w_to_any(tmpsubstname, substitutename_len, &substitutename_len);
if (!substitutename || substitutename_len >= MAXPATHLEN) {
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
free(substitutename);
#if VIRTUAL_CWD_DEBUG
free(printname);
#endif
FREE_PATHW()
return (size_t)-1;
}
}
else if(pbuffer->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) {
isabsolute = 1;
reparsetarget = pbuffer->MountPointReparseBuffer.ReparseTarget;
#if VIRTUAL_CWD_DEBUG
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 (size_t)-1;
}
#endif
substitutename_len = pbuffer->MountPointReparseBuffer.SubstituteNameLength / sizeof(WCHAR);
if (substitutename_len >= MAXPATHLEN) {
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
memmove(tmpsubstname, reparsetarget + pbuffer->MountPointReparseBuffer.SubstituteNameOffset / sizeof(WCHAR), pbuffer->MountPointReparseBuffer.SubstituteNameLength);
tmpsubstname[substitutename_len] = L'\0';
substitutename = php_win32_cp_conv_w_to_any(tmpsubstname, substitutename_len, &substitutename_len);
if (!substitutename || substitutename_len >= MAXPATHLEN) {
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
free(substitutename);
#if VIRTUAL_CWD_DEBUG
free(printname);
#endif
FREE_PATHW()
return (size_t)-1;
}
}
else if (pbuffer->ReparseTag == IO_REPARSE_TAG_DEDUP ||
/* Starting with 1709. */
(pbuffer->ReparseTag & ~IO_REPARSE_TAG_CLOUD_MASK) == IO_REPARSE_TAG_CLOUD ||
IO_REPARSE_TAG_ONEDRIVE == pbuffer->ReparseTag ||
IO_REPARSE_TAG_ACTIVISION_HSM == pbuffer->ReparseTag ||
IO_REPARSE_TAG_PROJFS == pbuffer->ReparseTag) {
isabsolute = 1;
substitutename = malloc((len + 1) * sizeof(char));
if (!substitutename) {
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
memcpy(substitutename, path, len + 1);
substitutename_len = len;
} else {
/* XXX this might be not the end, restart handling with REPARSE_GUID_DATA_BUFFER should be implemented. */
free_alloca(pbuffer, use_heap_large);
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
if(isabsolute && substitutename_len > 4) {
/* Do not resolve volumes (for now). A mounted point can
target a volume without a drive, it is not certain that
all IO functions we use in php and its deps support
path with volume GUID instead of the DOS way, like:
d:\test\mnt\foo
\\?\Volume{62d1c3f8-83b9-11de-b108-806e6f6e6963}\foo
*/
if (strncmp(substitutename, "\\??\\Volume{",11) == 0
|| strncmp(substitutename, "\\\\?\\Volume{",11) == 0
|| strncmp(substitutename, "\\??\\UNC\\", 8) == 0
) {
isVolume = TRUE;
substitutename_off = 0;
} else
/* do not use the \??\ and \\?\ prefix*/
if (strncmp(substitutename, "\\??\\", 4) == 0
|| strncmp(substitutename, "\\\\?\\", 4) == 0) {
substitutename_off = 4;
}
}
if (!isVolume) {
char * tmp2 = substitutename + substitutename_off;
for (bufindex = 0; bufindex + substitutename_off < substitutename_len; bufindex++) {
*(path + bufindex) = *(tmp2 + bufindex);
}
*(path + bufindex) = 0;
j = bufindex;
} else {
j = len;
}
#if VIRTUAL_CWD_DEBUG
fprintf(stderr, "reparse: print: %s ", printname);
fprintf(stderr, "sub: %s ", substitutename);
fprintf(stderr, "resolved: %s ", path);
free(printname);
#endif
free_alloca(pbuffer, use_heap_large);
free(substitutename);
if (may_retry_reparse_point) {
DWORD attrs;
FREE_PATHW()
pathw = php_win32_ioutil_any_to_w(path);
if (!pathw) {
return (size_t)-1;
}
attrs = GetFileAttributesW(pathw);
if (!isVolume && attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_REPARSE_POINT)) {
free_alloca(tmp, use_heap);
FREE_PATHW()
goto retry_reparse_point;
}
}
if(isabsolute == 1) {
if (!((j == 3) && (path[1] == ':') && (path[2] == '\\'))) {
/* use_realpath is 0 in the call below coz path is absolute*/
j = tsrm_realpath_r(path, 0, j, ll, t, 0, is_dir, &directory);
if(j == (size_t)-1) {
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
}
}
else {
if(i + j >= MAXPATHLEN - 1) {
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
memmove(path+i, path, j+1);
memcpy(path, tmp, i-1);
path[i-1] = DEFAULT_SLASH;
j = tsrm_realpath_r(path, start, i + j, ll, t, use_realpath, is_dir, &directory);
if(j == (size_t)-1) {
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
}
directory = (dataw.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
if(link_is_dir) {
*link_is_dir = directory;
}
}
else {
if (save) {
directory = (dataw.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
if (is_dir && !directory) {
/* not a directory */
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
}
#else
if (save && php_sys_lstat(path, &st) < 0) {
if (use_realpath == CWD_REALPATH) {
/* file not found */
return (size_t)-1;
}
/* continue resolution anyway but don't save result in the cache */
save = 0;
}
tmp = do_alloca(len+1, use_heap);
memcpy(tmp, path, len+1);
if (save && S_ISLNK(st.st_mode)) {
if (++(*ll) > LINK_MAX || (j = (size_t)php_sys_readlink(tmp, path, MAXPATHLEN)) == (size_t)-1) {
/* too many links or broken symlinks */
free_alloca(tmp, use_heap);
return (size_t)-1;
}
path[j] = 0;
if (IS_ABSOLUTE_PATH(path, j)) {
j = tsrm_realpath_r(path, 1, j, ll, t, use_realpath, is_dir, &directory);
if (j == (size_t)-1) {
free_alloca(tmp, use_heap);
return (size_t)-1;
}
} else {
if (i + j >= MAXPATHLEN-1) {
free_alloca(tmp, use_heap);
return (size_t)-1; /* buffer overflow */
}
memmove(path+i, path, j+1);
memcpy(path, tmp, i-1);
path[i-1] = DEFAULT_SLASH;
j = tsrm_realpath_r(path, start, i + j, ll, t, use_realpath, is_dir, &directory);
if (j == (size_t)-1) {
free_alloca(tmp, use_heap);
return (size_t)-1;
}
}
if (link_is_dir) {
*link_is_dir = directory;
}
} else {
if (save) {
directory = S_ISDIR(st.st_mode);
if (link_is_dir) {
*link_is_dir = directory;
}
if (is_dir && !directory) {
/* not a directory */
free_alloca(tmp, use_heap);
return (size_t)-1;
}
}
#endif
if (i <= start + 1) {
j = start;
} else {
/* some leading directories may be unaccessable */
j = tsrm_realpath_r(path, start, i-1, ll, t, save ? CWD_FILEPATH : use_realpath, 1, NULL);
if (j > start && j != (size_t)-1) {
path[j++] = DEFAULT_SLASH;
}
}
#ifdef ZEND_WIN32
if (j == (size_t)-1 || j + len >= MAXPATHLEN - 1 + i) {
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
if (save) {
size_t sz;
char *tmp_path = php_win32_ioutil_conv_w_to_any(dataw.cFileName, PHP_WIN32_CP_IGNORE_LEN, &sz);
if (!tmp_path) {
free_alloca(tmp, use_heap);
FREE_PATHW()
return (size_t)-1;
}
i = sz;
memcpy(path+j, tmp_path, i+1);
free(tmp_path);
j += i;
} else {
/* use the original file or directory name as it wasn't found */
memcpy(path+j, tmp+i, len-i+1);
j += (len-i);
}
}
#else
if (j == (size_t)-1 || j + len >= MAXPATHLEN - 1 + i) {
free_alloca(tmp, use_heap);
return (size_t)-1;
}
memcpy(path+j, tmp+i, len-i+1);
j += (len-i);
}
#endif
if (save && start && CWDG(realpath_cache_size_limit)) {
/* save absolute path in the cache */
realpath_cache_add(tmp, len, path, j, directory, *t);
}
free_alloca(tmp, use_heap);
#ifdef ZEND_WIN32
FREE_PATHW()
#undef FREE_PATHW
#endif