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dll: POSIX interop:

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FspPosixMapPosixToWindowsPath, FspPosixMapWindowsToPosixPath
This commit is contained in:
Bill Zissimopoulos 2016-06-07 13:00:15 -07:00
parent 6bef445102
commit 8c8d80add3
2 changed files with 135 additions and 0 deletions
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3
inc/winfsp/winfsp.h
View File

@ -850,6 +850,9 @@ FSP_API NTSTATUS FspPosixMapPermissionsToSecurityDescriptor(
FSP_API NTSTATUS FspPosixMapSecurityDescriptorToPermissions(
PSECURITY_DESCRIPTOR SecurityDescriptor,
PUINT32 PUid, PUINT32 PGid, PUINT32 PMode);
FSP_API NTSTATUS FspPosixMapWindowsToPosixPath(PWSTR WindowsPath, const char **PPosixPath);
FSP_API NTSTATUS FspPosixMapPosixToWindowsPath(const char *PosixPath, PWSTR *PWindowsPath);
FSP_API VOID FspPosixDeletePath(void *Path);
/*
* Path Handling

132
src/dll/posix.c
View File

@ -770,3 +770,135 @@ lasterror:
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
/*
* Services for Macintosh and Cygwin compatible filename transformation:
* Transform characters invalid for Windows filenames to the Unicode
* private use area in the U+F0XX range.
*
* The invalid maps are produced by the following Python script:
* reserved = ['<', '>', ':', '"', '/', '|', '?', '*']
* l = [str(int(0 < i < 32 or chr(i) in reserved)) for i in xrange(0, 128)]
* print "0x%08x" % int("".join(l[0:32]), 2)
* print "0x%08x" % int("".join(l[32:64]), 2)
* print "0x%08x" % int("".join(l[64:96]), 2)
* print "0x%08x" % int("".join(l[96:128]), 2)
*/
static UINT32 FspPosixInvalidPathChars[4] =
{
0x7fffffff,
0x2021002b,
0x00000000,
0x00000008,
};
FSP_API NTSTATUS FspPosixMapWindowsToPosixPath(PWSTR WindowsPath, const char **PPosixPath)
{
NTSTATUS Result;
ULONG Size;
char *PosixPath = 0, *p, *q;
*PPosixPath = 0;
Size = WideCharToMultiByte(CP_UTF8, 0, WindowsPath, -1, 0, 0, 0, 0);
if (0 == Size)
goto lasterror;
PosixPath = MemAlloc(Size);
if (0 == PosixPath)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
Size = WideCharToMultiByte(CP_UTF8, 0, WindowsPath, -1, PosixPath, Size, 0, 0);
if (0 == Size)
goto lasterror;
for (p = PosixPath, q = p; *p; p++)
{
char c = *p;
if ('\\' == c)
*q++ = '/';
/* encode characters in the Unicode private use area: U+F0XX -> XX */
else if (0xef == c && 0x80 == (0xfc & p[1]) && 0x80 == (0xc0 & p[2]))
{
c = ((p[1] & 0x3) << 6) | (p[2] & 0x3f);
if (128 > c && (FspPosixInvalidPathChars[c >> 5] & (0x80000000 >> (c & 0x1f))))
*q++ = c;
else
*q++ = *p++, *q++ = *p++, *q++ = *p;
}
else
*q++ = c;
}
*q = '\0';
*PPosixPath = PosixPath;
Result = STATUS_SUCCESS;
exit:
if (!NT_SUCCESS(Result))
MemFree(PosixPath);
return Result;
lasterror:
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
FSP_API NTSTATUS FspPosixMapPosixToWindowsPath(const char *PosixPath, PWSTR *PWindowsPath)
{
NTSTATUS Result;
ULONG Size;
PWSTR WindowsPath = 0, p;
*PWindowsPath = 0;
Size = MultiByteToWideChar(CP_UTF8, 0, PosixPath, -1, 0, 0);
if (0 == Size)
goto lasterror;
WindowsPath = MemAlloc(Size);
if (0 == PosixPath)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
Size = MultiByteToWideChar(CP_UTF8, 0, PosixPath, -1, WindowsPath, Size);
if (0 == Size)
goto lasterror;
for (p = WindowsPath; *p; p++)
{
WCHAR c = *p;
if (L'/' == c)
*p = L'\\';
else if (128 > c && (FspPosixInvalidPathChars[c >> 5] & (0x80000000 >> (c & 0x1f))))
*p |= 0xf000;
}
*PWindowsPath = WindowsPath;
Result = STATUS_SUCCESS;
exit:
if (!NT_SUCCESS(Result))
MemFree(WindowsPath);
return Result;
lasterror:
Result = FspNtStatusFromWin32(GetLastError());
goto exit;
}
FSP_API VOID FspPosixDeletePath(void *Path)
{
MemFree(Path);
}