/* ----------------------------------------------------------------------------
(c) The University of Glasgow 2006
Useful Win32 bits
------------------------------------------------------------------------- */
#if defined(_WIN32)
/* Use Mingw's C99 print functions. */
#define __USE_MINGW_ANSI_STDIO 1
/* Using Secure APIs */
#define MINGW_HAS_SECURE_API 1
#include "HsBase.h"
#include <stdbool.h>
#include <stdint.h>
#include <wchar.h>
#include <windows.h>
#include <io.h>
#include <objbase.h>
#include <ntstatus.h>
#include <winternl.h>
#include "fs.h"
/* This is the error table that defines the mapping between OS error
codes and errno values */
struct errentry {
unsigned long oscode; /* OS return value */
int errnocode; /* System V error code */
};
static struct errentry errtable[] = {
{ ERROR_INVALID_FUNCTION, EINVAL }, /* 1 */
{ ERROR_FILE_NOT_FOUND, ENOENT }, /* 2 */
{ ERROR_PATH_NOT_FOUND, ENOENT }, /* 3 */
{ ERROR_TOO_MANY_OPEN_FILES, EMFILE }, /* 4 */
{ ERROR_ACCESS_DENIED, EACCES }, /* 5 */
{ ERROR_INVALID_HANDLE, EBADF }, /* 6 */
{ ERROR_ARENA_TRASHED, ENOMEM }, /* 7 */
{ ERROR_NOT_ENOUGH_MEMORY, ENOMEM }, /* 8 */
{ ERROR_INVALID_BLOCK, ENOMEM }, /* 9 */
{ ERROR_BAD_ENVIRONMENT, E2BIG }, /* 10 */
{ ERROR_BAD_FORMAT, ENOEXEC }, /* 11 */
{ ERROR_INVALID_ACCESS, EINVAL }, /* 12 */
{ ERROR_INVALID_DATA, EINVAL }, /* 13 */
{ ERROR_INVALID_DRIVE, ENOENT }, /* 15 */
{ ERROR_CURRENT_DIRECTORY, EACCES }, /* 16 */
{ ERROR_NOT_SAME_DEVICE, EXDEV }, /* 17 */
{ ERROR_NO_MORE_FILES, ENOENT }, /* 18 */
{ ERROR_LOCK_VIOLATION, EACCES }, /* 33 */
{ ERROR_BAD_NETPATH, ENOENT }, /* 53 */
{ ERROR_NETWORK_ACCESS_DENIED, EACCES }, /* 65 */
{ ERROR_BAD_NET_NAME, ENOENT }, /* 67 */
{ ERROR_FILE_EXISTS, EEXIST }, /* 80 */
{ ERROR_CANNOT_MAKE, EACCES }, /* 82 */
{ ERROR_FAIL_I24, EACCES }, /* 83 */
{ ERROR_INVALID_PARAMETER, EINVAL }, /* 87 */
{ ERROR_NO_PROC_SLOTS, EAGAIN }, /* 89 */
{ ERROR_DRIVE_LOCKED, EACCES }, /* 108 */
{ ERROR_BROKEN_PIPE, EPIPE }, /* 109 */
{ ERROR_DISK_FULL, ENOSPC }, /* 112 */
{ ERROR_INVALID_TARGET_HANDLE, EBADF }, /* 114 */
{ ERROR_INVALID_HANDLE, EINVAL }, /* 124 */
{ ERROR_WAIT_NO_CHILDREN, ECHILD }, /* 128 */
{ ERROR_CHILD_NOT_COMPLETE, ECHILD }, /* 129 */
{ ERROR_DIRECT_ACCESS_HANDLE, EBADF }, /* 130 */
{ ERROR_NEGATIVE_SEEK, EINVAL }, /* 131 */
{ ERROR_SEEK_ON_DEVICE, EACCES }, /* 132 */
{ ERROR_DIR_NOT_EMPTY, ENOTEMPTY }, /* 145 */
{ ERROR_NOT_LOCKED, EACCES }, /* 158 */
{ ERROR_BAD_PATHNAME, ENOENT }, /* 161 */
{ ERROR_MAX_THRDS_REACHED, EAGAIN }, /* 164 */
{ ERROR_LOCK_FAILED, EACCES }, /* 167 */
{ ERROR_ALREADY_EXISTS, EEXIST }, /* 183 */
{ ERROR_FILENAME_EXCED_RANGE, ENOENT }, /* 206 */
{ ERROR_NESTING_NOT_ALLOWED, EAGAIN }, /* 215 */
/* Windows returns this when the read end of a pipe is
* closed (or closing) and we write to it. */
{ ERROR_NO_DATA, EPIPE }, /* 232 */
{ ERROR_NOT_ENOUGH_QUOTA, ENOMEM } /* 1816 */
};
/* size of the table */
#define ERRTABLESIZE (sizeof(errtable)/sizeof(errtable[0]))
/* The following two constants must be the minimum and maximum
values in the (contiguous) range of Exec Failure errors. */
#define MIN_EXEC_ERROR ERROR_INVALID_STARTING_CODESEG
#define MAX_EXEC_ERROR ERROR_INFLOOP_IN_RELOC_CHAIN
/* These are the low and high value in the range of errors that are
access violations */
#define MIN_EACCES_RANGE ERROR_WRITE_PROTECT
#define MAX_EACCES_RANGE ERROR_SHARING_BUFFER_EXCEEDED
void maperrno(void)
{
errno = maperrno_func(GetLastError());
}
int maperrno_func(DWORD dwErrorCode)
{
int i;
/* check the table for the OS error code */
for (i = 0; i < ERRTABLESIZE; ++i)
if (dwErrorCode == errtable[i].oscode)
return errtable[i].errnocode;
/* The error code wasn't in the table. We check for a range of */
/* EACCES errors or exec failure errors (ENOEXEC). Otherwise */
/* EINVAL is returned. */
if (dwErrorCode >= MIN_EACCES_RANGE && dwErrorCode <= MAX_EACCES_RANGE)
return EACCES;
else if (dwErrorCode >= MIN_EXEC_ERROR && dwErrorCode <= MAX_EXEC_ERROR)
return ENOEXEC;
else
return EINVAL;
}
LPWSTR base_getErrorMessage(DWORD err)
{
LPWSTR what;
DWORD res;
res = FormatMessageW(
(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER),
NULL,
err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), /* Default language */
(LPWSTR) &what,
0,
NULL
);
if (res == 0)
return NULL;
return what;
}
int get_unique_file_info_hwnd(HANDLE h, HsWord64 *dev, HsWord64 *ino)
{
BY_HANDLE_FILE_INFORMATION info;
if (GetFileInformationByHandle(h, &info))
{
*dev = info.dwVolumeSerialNumber;
*ino = info.nFileIndexLow
| ((HsWord64)info.nFileIndexHigh << 32);
return 0;
}
return -1;
}
int get_unique_file_info(int fd, HsWord64 *dev, HsWord64 *ino)
{
HANDLE h = (HANDLE)_get_osfhandle(fd);
return get_unique_file_info_hwnd (h, dev, ino);
}
BOOL file_exists(LPCTSTR path)
{
DWORD r = GetFileAttributes(path);
return r != INVALID_FILE_ATTRIBUTES;
}
/* If true then caller needs to free tempFileName. */
bool __createUUIDTempFileErrNo (wchar_t* pathName, wchar_t* prefix,
wchar_t* suffix, wchar_t** tempFileName)
{
*tempFileName = NULL;
int retry = 5;
bool success = false;
while (retry-- > 0 && !success)
{
GUID guid;
ZeroMemory (&guid, sizeof (guid));
if (CoCreateGuid (&guid) != S_OK)
goto fail;
RPC_WSTR guidStr;
if (UuidToStringW ((UUID*)&guid, &guidStr) != S_OK)
goto fail;
/* We can't create a device path here since this path escapes the compiler
so instead return a normal path and have openFile deal with it. */
wchar_t* devName = malloc (sizeof (wchar_t) * (wcslen (pathName) + 1));
wcscpy (devName, pathName);
int len = wcslen (devName) + wcslen (suffix) + wcslen (prefix)
+ wcslen (guidStr) + 3;
*tempFileName = malloc (len * sizeof (wchar_t));
if (*tempFileName == NULL)
goto fail;
/* Only add a slash if path didn't already end in one, otherwise we create
an invalid path. */
bool slashed = devName[wcslen(devName)-1] == '\\';
wchar_t* sep = slashed ? L"" : L"\\";
if (-1 == swprintf_s (*tempFileName, len, L"%ls%ls%ls-%ls%ls",
devName, sep, prefix, guidStr, suffix))
goto fail;
free (devName);
RpcStringFreeW (&guidStr);
/* This should never happen because GUIDs are unique. But in case hell
froze over let's check anyway. */
DWORD dwAttrib = GetFileAttributesW (*tempFileName);
success = (dwAttrib == INVALID_FILE_ATTRIBUTES
|| (dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
if (!success)
free (*tempFileName);
}
return success;
fail:
if (*tempFileName != NULL) {
free (*tempFileName);
}
maperrno();
return false;
}
/* Seems to be part of the Windows SDK so provide an inline definition for
use and rename it so it doesn't conflict for people who do have the SDK. */
typedef struct _MY_PUBLIC_OBJECT_BASIC_INFORMATION {
ULONG Attributes;
ACCESS_MASK GrantedAccess;
ULONG HandleCount;
ULONG PointerCount;
ULONG Reserved[10];
} MY_PUBLIC_OBJECT_BASIC_INFORMATION, *PMY_PUBLIC_OBJECT_BASIC_INFORMATION;
ACCESS_MASK __get_handle_access_mask (HANDLE handle)
{
MY_PUBLIC_OBJECT_BASIC_INFORMATION obi;
if (STATUS_SUCCESS != NtQueryObject(handle, ObjectBasicInformation, &obi,
sizeof(obi), NULL))
{
return obi.GrantedAccess;
}
maperrno();
return 0;
}
bool getTempFileNameErrorNo (wchar_t* pathName, wchar_t* prefix,
wchar_t* suffix, uint32_t uUnique,
wchar_t* tempFileName)
{
int retry = 5;
bool success = false;
while (retry > 0 && !success)
{
// TODO: This needs to handle long file names.
if (!GetTempFileNameW(pathName, prefix, uUnique, tempFileName))
{
maperrno();
return false;
}
wchar_t* drive = malloc (sizeof(wchar_t) * _MAX_DRIVE);
wchar_t* dir = malloc (sizeof(wchar_t) * _MAX_DIR);
wchar_t* fname = malloc (sizeof(wchar_t) * _MAX_FNAME);
if (_wsplitpath_s (tempFileName, drive, _MAX_DRIVE, dir, _MAX_DIR,
fname, _MAX_FNAME, NULL, 0) != 0)
{
success = false;
maperrno ();
}
else
{
wchar_t* temp = _wcsdup (tempFileName);
if (wcsnlen(drive, _MAX_DRIVE) == 0)
swprintf_s(tempFileName, MAX_PATH, L"%s\%s%s",
dir, fname, suffix);
else
swprintf_s(tempFileName, MAX_PATH, L"%s\%s\%s%s",
drive, dir, fname, suffix);
success
= MoveFileExW(temp, tempFileName, MOVEFILE_WRITE_THROUGH
| MOVEFILE_COPY_ALLOWED) != 0;
errno = 0;
if (!success && (GetLastError () != ERROR_FILE_EXISTS || --retry < 0))
{
success = false;
maperrno ();
DeleteFileW (temp);
}
free(temp);
}
free(drive);
free(dir);
free(fname);
}
return success;
}
#endif