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fs.c
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fs.c
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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <assert.h>
#include <malloc.h>
#include <direct.h>
#include <errno.h>
#include <fcntl.h>
#include <io.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/utime.h>
#include <stdio.h>
#include "uv.h"
#include "internal.h"
#include "req-inl.h"
#define UV_FS_FREE_PATHS 0x0002
#define UV_FS_FREE_PTR 0x0008
#define UV_FS_CLEANEDUP 0x0010
#define QUEUE_FS_TP_JOB(loop, req) \
do { \
if (!QueueUserWorkItem(&uv_fs_thread_proc, \
req, \
WT_EXECUTEDEFAULT)) { \
uv__set_sys_error((loop), GetLastError()); \
return -1; \
} \
uv__req_register(loop, req); \
} while (0)
#define SET_UV_LAST_ERROR_FROM_REQ(req) \
uv__set_error(req->loop, req->errorno, req->sys_errno_)
#define SET_REQ_RESULT(req, result_value) \
do { \
req->result = (result_value); \
if (req->result == -1) { \
req->sys_errno_ = _doserrno; \
req->errorno = uv_translate_sys_error(req->sys_errno_); \
} \
} while (0)
#define SET_REQ_WIN32_ERROR(req, sys_errno) \
do { \
req->result = -1; \
req->sys_errno_ = (sys_errno); \
req->errorno = uv_translate_sys_error(req->sys_errno_); \
} while (0)
#define SET_REQ_UV_ERROR(req, uv_errno, sys_errno) \
do { \
req->result = -1; \
req->sys_errno_ = (sys_errno); \
req->errorno = (uv_errno); \
} while (0)
#define VERIFY_FD(fd, req) \
if (fd == -1) { \
req->result = -1; \
req->errorno = UV_EBADF; \
req->sys_errno_ = ERROR_INVALID_HANDLE; \
return; \
}
#define FILETIME_TO_TIME_T(filetime) \
((*((uint64_t*) &(filetime)) - 116444736000000000ULL) / 10000000ULL)
#define TIME_T_TO_FILETIME(time, filetime_ptr) \
do { \
*(uint64_t*) (filetime_ptr) = ((int64_t) (time) * 10000000LL) + \
116444736000000000ULL; \
} while(0)
#define IS_SLASH(c) ((c) == L'\\' || (c) == L'/')
#define IS_LETTER(c) (((c) >= L'a' && (c) <= L'z') || \
((c) >= L'A' && (c) <= L'Z'))
const WCHAR JUNCTION_PREFIX[] = L"\\??\\";
const WCHAR JUNCTION_PREFIX_LEN = 4;
const WCHAR LONG_PATH_PREFIX[] = L"\\\\?\\";
const WCHAR LONG_PATH_PREFIX_LEN = 4;
void uv_fs_init() {
_fmode = _O_BINARY;
}
INLINE static int fs__capture_path(uv_loop_t* loop, uv_fs_t* req,
const char* path, const char* new_path, const int copy_path) {
char* buf;
char* pos;
ssize_t buf_sz = 0, path_len, pathw_len, new_pathw_len;
/* new_path can only be set if path is also set. */
assert(new_path == NULL || path != NULL);
if (path != NULL) {
pathw_len = MultiByteToWideChar(CP_UTF8,
0,
path,
-1,
NULL,
0);
if (pathw_len == 0) {
uv__set_sys_error(loop, GetLastError());
return -1;
}
buf_sz += pathw_len * sizeof(WCHAR);
}
if (path != NULL && copy_path) {
path_len = 1 + strlen(path);
buf_sz += path_len;
}
if (new_path != NULL) {
new_pathw_len = MultiByteToWideChar(CP_UTF8,
0,
new_path,
-1,
NULL,
0);
if (new_pathw_len == 0) {
uv__set_sys_error(loop, GetLastError());
return -1;
}
buf_sz += new_pathw_len * sizeof(WCHAR);
}
if (buf_sz == 0) {
req->pathw = NULL;
req->new_pathw = NULL;
req->path = NULL;
return 0;
}
buf = (char*) malloc(buf_sz);
if (buf == NULL) {
uv__set_artificial_error(loop, UV_ENOMEM);
return -1;
}
pos = buf;
if (path != NULL) {
DWORD r = MultiByteToWideChar(CP_UTF8,
0,
path,
-1,
(WCHAR*) pos,
pathw_len);
assert(r == pathw_len);
req->pathw = (WCHAR*) pos;
pos += r * sizeof(WCHAR);
} else {
req->pathw = NULL;
}
if (new_path != NULL) {
DWORD r = MultiByteToWideChar(CP_UTF8,
0,
new_path,
-1,
(WCHAR*) pos,
new_pathw_len);
assert(r == new_pathw_len);
req->new_pathw = (WCHAR*) pos;
pos += r * sizeof(WCHAR);
} else {
req->new_pathw = NULL;
}
if (!copy_path) {
req->path = path;
} else if (path) {
memcpy(pos, path, path_len);
assert(path_len == buf_sz - (pos - buf));
req->path = pos;
} else {
req->path = NULL;
}
req->flags |= UV_FS_FREE_PATHS;
return 0;
}
INLINE static void uv_fs_req_init(uv_loop_t* loop, uv_fs_t* req,
uv_fs_type fs_type, const uv_fs_cb cb) {
uv_req_init(loop, (uv_req_t*) req);
req->type = UV_FS;
req->loop = loop;
req->flags = 0;
req->fs_type = fs_type;
req->result = 0;
req->ptr = NULL;
req->errorno = UV_OK;
req->path = NULL;
if (cb != NULL) {
req->cb = cb;
memset(&req->overlapped, 0, sizeof(req->overlapped));
}
}
static int is_path_dir(const WCHAR* path) {
DWORD attr = GetFileAttributesW(path);
if (attr != INVALID_FILE_ATTRIBUTES) {
return attr & FILE_ATTRIBUTE_DIRECTORY ? 1 : 0;
} else {
return 0;
}
}
INLINE static int fs__readlink_handle(HANDLE handle, char** target_ptr,
int64_t* target_len_ptr) {
char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
REPARSE_DATA_BUFFER* reparse_data = (REPARSE_DATA_BUFFER*) buffer;
WCHAR *w_target;
DWORD w_target_len;
char* target;
int target_len;
DWORD bytes;
if (!DeviceIoControl(handle,
FSCTL_GET_REPARSE_POINT,
NULL,
0,
buffer,
sizeof buffer,
&bytes,
NULL)) {
return -1;
}
if (reparse_data->ReparseTag == IO_REPARSE_TAG_SYMLINK) {
/* Real symlink */
w_target = reparse_data->SymbolicLinkReparseBuffer.PathBuffer +
(reparse_data->SymbolicLinkReparseBuffer.SubstituteNameOffset /
sizeof(WCHAR));
w_target_len =
reparse_data->SymbolicLinkReparseBuffer.SubstituteNameLength /
sizeof(WCHAR);
/* Real symlinks can contain pretty much everything, but the only thing */
/* we really care about is undoing the implicit conversion to an NT */
/* namespaced path that CreateSymbolicLink will perform on absolute */
/* paths. If the path is win32-namespaced then the user must have */
/* explicitly made it so, and we better just return the unmodified */
/* reparse data. */
if (w_target_len >= 4 &&
w_target[0] == L'\\' &&
w_target[1] == L'?' &&
w_target[2] == L'?' &&
w_target[3] == L'\\') {
/* Starts with \??\ */
if (w_target_len >= 6 &&
((w_target[4] >= L'A' && w_target[4] <= L'Z') ||
(w_target[4] >= L'a' && w_target[4] <= L'z')) &&
w_target[5] == L':' &&
(w_target_len == 6 || w_target[6] == L'\\')) {
/* \??\«drive»:\ */
w_target += 4;
w_target_len -= 4;
} else if (w_target_len >= 8 &&
(w_target[4] == L'U' || w_target[4] == L'u') &&
(w_target[5] == L'N' || w_target[5] == L'n') &&
(w_target[6] == L'C' || w_target[6] == L'c') &&
w_target[7] == L'\\') {
/* \??\UNC\«server»\«share»\ - make sure the final path looks like */
/* \\«server»\«share»\ */
w_target += 6;
w_target[0] = L'\\';
w_target_len -= 6;
}
}
} else if (reparse_data->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) {
/* Junction. */
w_target = reparse_data->MountPointReparseBuffer.PathBuffer +
(reparse_data->MountPointReparseBuffer.SubstituteNameOffset /
sizeof(WCHAR));
w_target_len = reparse_data->MountPointReparseBuffer.SubstituteNameLength /
sizeof(WCHAR);
/* Only treat junctions that look like \??\«drive»:\ as symlink. */
/* Junctions can also be used as mount points, like \??\Volume{«guid»}, */
/* but that's confusing for programs since they wouldn't be able to */
/* actually understand such a path when returned by uv_readlink(). */
/* UNC paths are never valid for junctions so we don't care about them. */
if (!(w_target_len >= 6 &&
w_target[0] == L'\\' &&
w_target[1] == L'?' &&
w_target[2] == L'?' &&
w_target[3] == L'\\' &&
((w_target[4] >= L'A' && w_target[4] <= L'Z') ||
(w_target[4] >= L'a' && w_target[4] <= L'z')) &&
w_target[5] == L':' &&
(w_target_len == 6 || w_target[6] == L'\\'))) {
SetLastError(ERROR_SYMLINK_NOT_SUPPORTED);
return -1;
}
/* Remove leading \??\ */
w_target += 4;
w_target_len -= 4;
} else {
/* Reparse tag does not indicate a symlink. */
SetLastError(ERROR_SYMLINK_NOT_SUPPORTED);
return -1;
}
/* If needed, compute the length of the target. */
if (target_ptr != NULL || target_len_ptr != NULL) {
/* Compute the length of the target. */
target_len = WideCharToMultiByte(CP_UTF8,
0,
w_target,
w_target_len,
NULL,
0,
NULL,
NULL);
if (target_len == 0) {
return -1;
}
}
/* If requested, allocate memory and convert to UTF8. */
if (target_ptr != NULL) {
int r;
target = (char*) malloc(target_len + 1);
if (target == NULL) {
SetLastError(ERROR_OUTOFMEMORY);
return -1;
}
r = WideCharToMultiByte(CP_UTF8,
0,
w_target,
w_target_len,
target,
target_len,
NULL,
NULL);
assert(r == target_len);
target[target_len] = '\0';
*target_ptr = target;
}
if (target_len_ptr != NULL) {
*target_len_ptr = target_len;
}
return 0;
}
void fs__open(uv_fs_t* req) {
DWORD access;
DWORD share;
DWORD disposition;
DWORD attributes = 0;
HANDLE file;
int fd, current_umask;
int flags = req->file_flags;
/* Obtain the active umask. umask() never fails and returns the previous */
/* umask. */
current_umask = umask(0);
umask(current_umask);
/* convert flags and mode to CreateFile parameters */
switch (flags & (_O_RDONLY | _O_WRONLY | _O_RDWR)) {
case _O_RDONLY:
access = FILE_GENERIC_READ;
attributes |= FILE_FLAG_BACKUP_SEMANTICS;
break;
case _O_WRONLY:
access = FILE_GENERIC_WRITE;
break;
case _O_RDWR:
access = FILE_GENERIC_READ | FILE_GENERIC_WRITE;
break;
default:
goto einval;
}
if (flags & _O_APPEND) {
access &= ~FILE_WRITE_DATA;
access |= FILE_APPEND_DATA;
attributes &= ~FILE_FLAG_BACKUP_SEMANTICS;
}
/*
* Here is where we deviate significantly from what CRT's _open()
* does. We indiscriminately use all the sharing modes, to match
* UNIX semantics. In particular, this ensures that the file can
* be deleted even whilst it's open, fixing issue #1449.
*/
share = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
switch (flags & (_O_CREAT | _O_EXCL | _O_TRUNC)) {
case 0:
case _O_EXCL:
disposition = OPEN_EXISTING;
break;
case _O_CREAT:
disposition = OPEN_ALWAYS;
break;
case _O_CREAT | _O_EXCL:
case _O_CREAT | _O_TRUNC | _O_EXCL:
disposition = CREATE_NEW;
break;
case _O_TRUNC:
case _O_TRUNC | _O_EXCL:
disposition = TRUNCATE_EXISTING;
break;
case _O_CREAT | _O_TRUNC:
disposition = CREATE_ALWAYS;
break;
default:
goto einval;
}
attributes |= FILE_ATTRIBUTE_NORMAL;
if (flags & _O_CREAT) {
if (!((req->mode & ~current_umask) & _S_IWRITE)) {
attributes |= FILE_ATTRIBUTE_READONLY;
}
}
if (flags & _O_TEMPORARY ) {
attributes |= FILE_FLAG_DELETE_ON_CLOSE | FILE_ATTRIBUTE_TEMPORARY;
access |= DELETE;
}
if (flags & _O_SHORT_LIVED) {
attributes |= FILE_ATTRIBUTE_TEMPORARY;
}
switch (flags & (_O_SEQUENTIAL | _O_RANDOM)) {
case 0:
break;
case _O_SEQUENTIAL:
attributes |= FILE_FLAG_SEQUENTIAL_SCAN;
break;
case _O_RANDOM:
attributes |= FILE_FLAG_RANDOM_ACCESS;
break;
default:
goto einval;
}
/* Setting this flag makes it possible to open a directory. */
attributes |= FILE_FLAG_BACKUP_SEMANTICS;
file = CreateFileW(req->pathw,
access,
share,
NULL,
disposition,
attributes,
NULL);
if (file == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
if (error == ERROR_FILE_EXISTS && (flags & _O_CREAT) &&
!(flags & _O_EXCL)) {
/* Special case: when ERROR_FILE_EXISTS happens and O_CREAT was */
/* specified, it means the path referred to a directory. */
SET_REQ_UV_ERROR(req, UV_EISDIR, error);
} else {
SET_REQ_WIN32_ERROR(req, GetLastError());
}
return;
}
fd = _open_osfhandle((intptr_t) file, flags);
if (fd < 0) {
/* The only known failure mode for _open_osfhandle() is EMFILE, in which
* case GetLastError() will return zero. However we'll try to handle other
* errors as well, should they ever occur.
*/
if (errno == EMFILE)
SET_REQ_UV_ERROR(req, UV_EMFILE, ERROR_TOO_MANY_OPEN_FILES);
else if (GetLastError() != ERROR_SUCCESS)
SET_REQ_WIN32_ERROR(req, GetLastError());
else
SET_REQ_WIN32_ERROR(req, UV_UNKNOWN);
return;
}
SET_REQ_RESULT(req, fd);
return;
einval:
SET_REQ_UV_ERROR(req, UV_EINVAL, ERROR_INVALID_PARAMETER);
}
void fs__close(uv_fs_t* req) {
int fd = req->fd;
int result;
VERIFY_FD(fd, req);
result = _close(fd);
SET_REQ_RESULT(req, result);
}
void fs__read(uv_fs_t* req) {
int fd = req->fd;
size_t length = req->length;
int64_t offset = req->offset;
HANDLE handle;
OVERLAPPED overlapped, *overlapped_ptr;
LARGE_INTEGER offset_;
DWORD bytes;
DWORD error;
VERIFY_FD(fd, req);
handle = (HANDLE) _get_osfhandle(fd);
if (handle == INVALID_HANDLE_VALUE) {
SET_REQ_RESULT(req, -1);
return;
}
if (length > INT_MAX) {
SET_REQ_WIN32_ERROR(req, ERROR_INSUFFICIENT_BUFFER);
return;
}
if (offset != -1) {
memset(&overlapped, 0, sizeof overlapped);
offset_.QuadPart = offset;
overlapped.Offset = offset_.LowPart;
overlapped.OffsetHigh = offset_.HighPart;
overlapped_ptr = &overlapped;
} else {
overlapped_ptr = NULL;
}
if (ReadFile(handle, req->buf, req->length, &bytes, overlapped_ptr)) {
SET_REQ_RESULT(req, bytes);
} else {
error = GetLastError();
if (error == ERROR_HANDLE_EOF) {
SET_REQ_RESULT(req, bytes);
} else {
SET_REQ_WIN32_ERROR(req, error);
}
}
}
void fs__write(uv_fs_t* req) {
int fd = req->fd;
size_t length = req->length;
int64_t offset = req->offset;
HANDLE handle;
OVERLAPPED overlapped, *overlapped_ptr;
LARGE_INTEGER offset_;
DWORD bytes;
VERIFY_FD(fd, req);
handle = (HANDLE) _get_osfhandle(fd);
if (handle == INVALID_HANDLE_VALUE) {
SET_REQ_RESULT(req, -1);
return;
}
if (length > INT_MAX) {
SET_REQ_WIN32_ERROR(req, ERROR_INSUFFICIENT_BUFFER);
return;
}
if (offset != -1) {
memset(&overlapped, 0, sizeof overlapped);
offset_.QuadPart = offset;
overlapped.Offset = offset_.LowPart;
overlapped.OffsetHigh = offset_.HighPart;
overlapped_ptr = &overlapped;
} else {
overlapped_ptr = NULL;
}
if (WriteFile(handle, req->buf, length, &bytes, overlapped_ptr)) {
SET_REQ_RESULT(req, bytes);
} else {
SET_REQ_WIN32_ERROR(req, GetLastError());
}
}
void fs__rmdir(uv_fs_t* req) {
int result = _wrmdir(req->pathw);
SET_REQ_RESULT(req, result);
}
void fs__unlink(uv_fs_t* req) {
const WCHAR* pathw = req->pathw;
HANDLE handle;
BY_HANDLE_FILE_INFORMATION info;
FILE_DISPOSITION_INFORMATION disposition;
IO_STATUS_BLOCK iosb;
NTSTATUS status;
handle = CreateFileW(pathw,
FILE_READ_ATTRIBUTES | DELETE,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL,
OPEN_EXISTING,
FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS,
NULL);
if (handle == INVALID_HANDLE_VALUE) {
SET_REQ_WIN32_ERROR(req, GetLastError());
return;
}
if (!GetFileInformationByHandle(handle, &info)) {
SET_REQ_WIN32_ERROR(req, GetLastError());
CloseHandle(handle);
return;
}
if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
/* Do not allow deletion of directories, unless it is a symlink. When */
/* the path refers to a non-symlink directory, report EPERM as mandated */
/* by POSIX.1. */
/* Check if it is a reparse point. If it's not, it's a normal directory. */
if (!(info.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)) {
SET_REQ_WIN32_ERROR(req, ERROR_ACCESS_DENIED);
CloseHandle(handle);
return;
}
/* Read the reparse point and check if it is a valid symlink. */
/* If not, don't unlink. */
if (fs__readlink_handle(handle, NULL, NULL) < 0) {
DWORD error = GetLastError();
if (error == ERROR_SYMLINK_NOT_SUPPORTED)
error = ERROR_ACCESS_DENIED;
SET_REQ_WIN32_ERROR(req, error);
CloseHandle(handle);
return;
}
}
/* Try to set the delete flag. */
disposition.DeleteFile = TRUE;
status = pNtSetInformationFile(handle,
&iosb,
&disposition,
sizeof disposition,
FileDispositionInformation);
if (NT_SUCCESS(status)) {
SET_REQ_SUCCESS(req);
} else {
SET_REQ_WIN32_ERROR(req, pRtlNtStatusToDosError(status));
}
CloseHandle(handle);
}
void fs__mkdir(uv_fs_t* req) {
/* TODO: use req->mode. */
int result = _wmkdir(req->pathw);
SET_REQ_RESULT(req, result);
}
void fs__readdir(uv_fs_t* req) {
WCHAR* pathw = req->pathw;
size_t len = wcslen(pathw);
int result, size;
WCHAR* buf = NULL, *ptr, *name;
HANDLE dir;
WIN32_FIND_DATAW ent = { 0 };
size_t buf_char_len = 4096;
WCHAR* path2;
const WCHAR* fmt;
if (len == 0) {
fmt = L"./*";
} else if (pathw[len - 1] == L'/' || pathw[len - 1] == L'\\') {
fmt = L"%s*";
} else {
fmt = L"%s\\*";
}
/* Figure out whether path is a file or a directory. */
if (!(GetFileAttributesW(pathw) & FILE_ATTRIBUTE_DIRECTORY)) {
req->result = -1;
req->errorno = UV_ENOTDIR;
req->sys_errno_ = ERROR_SUCCESS;
return;
}
path2 = (WCHAR*)malloc(sizeof(WCHAR) * (len + 4));
if (!path2) {
uv_fatal_error(ERROR_OUTOFMEMORY, "malloc");
}
#ifdef _MSC_VER
swprintf(path2, len + 3, fmt, pathw);
#else
swprintf(path2, fmt, pathw);
#endif
dir = FindFirstFileW(path2, &ent);
free(path2);
if(dir == INVALID_HANDLE_VALUE) {
SET_REQ_WIN32_ERROR(req, GetLastError());
return;
}
result = 0;
do {
name = ent.cFileName;
if (name[0] != L'.' || (name[1] && (name[1] != L'.' || name[2]))) {
len = wcslen(name);
if (!buf) {
buf = (WCHAR*)malloc(buf_char_len * sizeof(WCHAR));
if (!buf) {
uv_fatal_error(ERROR_OUTOFMEMORY, "malloc");
}
ptr = buf;
}
while ((ptr - buf) + len + 1 > buf_char_len) {
buf_char_len *= 2;
path2 = buf;
buf = (WCHAR*)realloc(buf, buf_char_len * sizeof(WCHAR));
if (!buf) {
uv_fatal_error(ERROR_OUTOFMEMORY, "realloc");
}
ptr = buf + (ptr - path2);
}
wcscpy(ptr, name);
ptr += len + 1;
result++;
}
} while(FindNextFileW(dir, &ent));
FindClose(dir);
if (buf) {
/* Convert result to UTF8. */
size = uv_utf16_to_utf8(buf, buf_char_len, NULL, 0);
if (!size) {
SET_REQ_WIN32_ERROR(req, GetLastError());
return;
}
req->ptr = (char*)malloc(size + 1);
if (!req->ptr) {
uv_fatal_error(ERROR_OUTOFMEMORY, "malloc");
}
size = uv_utf16_to_utf8(buf, buf_char_len, (char*)req->ptr, size);
if (!size) {
free(buf);
free(req->ptr);
req->ptr = NULL;
SET_REQ_WIN32_ERROR(req, GetLastError());
return;
}
free(buf);
((char*)req->ptr)[size] = '\0';
req->flags |= UV_FS_FREE_PTR;
} else {
req->ptr = NULL;
}
SET_REQ_RESULT(req, result);
}
INLINE static int fs__stat_handle(HANDLE handle, uv_statbuf_t* statbuf) {
BY_HANDLE_FILE_INFORMATION info;
if (!GetFileInformationByHandle(handle, &info)) {
return -1;
}
/* TODO: set st_dev, st_rdev and st_ino to something meaningful. */
statbuf->st_ino = 0;
statbuf->st_dev = 0;
statbuf->st_rdev = 0;
statbuf->st_gid = 0;
statbuf->st_uid = 0;
statbuf->st_mode = 0;
if (info.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
if (fs__readlink_handle(handle, NULL, &statbuf->st_size) != 0) {
return -1;
}
statbuf->st_mode |= S_IFLNK;
} else if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
statbuf->st_mode |= _S_IFDIR;
statbuf->st_size = 0;
} else {
statbuf->st_mode |= _S_IFREG;
statbuf->st_size = ((int64_t) info.nFileSizeHigh << 32) +
(int64_t) info.nFileSizeLow;
}
if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY) {
statbuf->st_mode |= (_S_IREAD + (_S_IREAD >> 3) + (_S_IREAD >> 6));
} else {
statbuf->st_mode |= ((_S_IREAD|_S_IWRITE) + ((_S_IREAD|_S_IWRITE) >> 3) +
((_S_IREAD|_S_IWRITE) >> 6));
}
statbuf->st_mtime = FILETIME_TO_TIME_T(info.ftLastWriteTime);
statbuf->st_atime = FILETIME_TO_TIME_T(info.ftLastAccessTime);
statbuf->st_ctime = FILETIME_TO_TIME_T(info.ftCreationTime);
statbuf->st_nlink = (info.nNumberOfLinks <= SHRT_MAX) ?
(short) info.nNumberOfLinks : SHRT_MAX;
return 0;
}
INLINE static void fs__stat_prepare_path(WCHAR* pathw) {
size_t len = wcslen(pathw);
/* TODO: ignore namespaced paths. */
if (len > 1 && pathw[len - 2] != L':' &&
(pathw[len - 1] == L'\\' || pathw[len - 1] == L'/')) {
pathw[len - 1] = '\0';
}
}
INLINE static void fs__stat_impl(uv_fs_t* req, int do_lstat) {
HANDLE handle;
DWORD flags;
flags = FILE_FLAG_BACKUP_SEMANTICS;
if (do_lstat) {
flags |= FILE_FLAG_OPEN_REPARSE_POINT;
}
handle = CreateFileW(req->pathw,
FILE_READ_ATTRIBUTES,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL,
OPEN_EXISTING,
flags,
NULL);
if (handle == INVALID_HANDLE_VALUE) {
SET_REQ_WIN32_ERROR(req, GetLastError());
return;
}
if (fs__stat_handle(handle, &req->statbuf) != 0) {
DWORD error = GetLastError();
if (do_lstat && error == ERROR_SYMLINK_NOT_SUPPORTED) {
/* We opened a reparse point but it was not a symlink. Try again. */
fs__stat_impl(req, 0);
} else {
/* Stat failed. */
SET_REQ_WIN32_ERROR(req, GetLastError());
}
CloseHandle(handle);
return;
}
req->ptr = &req->statbuf;
req->result = 0;
CloseHandle(handle);
}
static void fs__stat(uv_fs_t* req) {
fs__stat_prepare_path(req->pathw);
fs__stat_impl(req, 0);
}
static void fs__lstat(uv_fs_t* req) {
fs__stat_prepare_path(req->pathw);
fs__stat_impl(req, 1);
}
static void fs__fstat(uv_fs_t* req) {
int fd = req->fd;
HANDLE handle;
VERIFY_FD(fd, req);
handle = (HANDLE) _get_osfhandle(fd);
if (handle == INVALID_HANDLE_VALUE) {
SET_REQ_WIN32_ERROR(req, ERROR_INVALID_HANDLE);
return;
}
if (fs__stat_handle(handle, &req->statbuf) != 0) {
SET_REQ_WIN32_ERROR(req, GetLastError());
return;
}
req->ptr = &req->statbuf;
req->result = 0;
}
static void fs__rename(uv_fs_t* req) {
if (!MoveFileExW(req->pathw, req->new_pathw, MOVEFILE_REPLACE_EXISTING)) {
SET_REQ_WIN32_ERROR(req, GetLastError());
return;
}
SET_REQ_RESULT(req, 0);
}
INLINE static void fs__sync_impl(uv_fs_t* req) {
int fd = req->fd;
int result;
VERIFY_FD(fd, req);
result = FlushFileBuffers((HANDLE) _get_osfhandle(fd)) ? 0 : -1;
if (result == -1) {
SET_REQ_WIN32_ERROR(req, GetLastError());
} else {
SET_REQ_RESULT(req, result);
}
}
static void fs__fsync(uv_fs_t* req) {
fs__sync_impl(req);
}