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ntdll: Better support for NT path names in wine_nt_to_unix_file_name. 

Don't map NT namespace 1:1 to Unix, add a magic \??\unix device instead.
More generic support for \??\ devices, with fallback to the wineserver
for paths that don't exist.
This commit is contained in:
Alexandre Julliard 2007-03-22 16:35:51 +01:00
parent 54c7b7e81b
commit ee478bbada
1 changed files with 68 additions and 52 deletions
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120
dlls/ntdll/directory.c
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@ -1799,7 +1799,7 @@ static inline int get_dos_prefix_len( const UNICODE_STRING *name )
NTSTATUS wine_nt_to_unix_file_name( const UNICODE_STRING *nameW, ANSI_STRING *unix_name_ret,
UINT disposition, BOOLEAN check_case )
{
static const WCHAR uncW[] = {'U','N','C','\\'};
static const WCHAR unixW[] = {'u','n','i','x'};
static const WCHAR invalid_charsW[] = { INVALID_NT_CHARS, 0 };
NTSTATUS status = STATUS_SUCCESS;
@ -1807,71 +1807,87 @@ NTSTATUS wine_nt_to_unix_file_name( const UNICODE_STRING *nameW, ANSI_STRING *un
const WCHAR *name, *p;
struct stat st;
char *unix_name;
int pos, ret, name_len, unix_len, used_default;
int pos, ret, name_len, unix_len, prefix_len, used_default;
WCHAR prefix[MAX_DIR_ENTRY_LEN];
BOOLEAN is_unix = FALSE;
name = nameW->Buffer;
name_len = nameW->Length / sizeof(WCHAR);
if (!name_len || !IS_SEPARATOR(name[0])) return STATUS_OBJECT_PATH_SYNTAX_BAD;
if ((pos = get_dos_prefix_len( nameW )))
if (!(pos = get_dos_prefix_len( nameW )))
return STATUS_BAD_DEVICE_TYPE; /* no DOS prefix, assume NT native name */
name += pos;
name_len -= pos;
/* check for sub-directory */
for (pos = 0; pos < name_len; pos++)
{
BOOLEAN is_unc = FALSE;
if (IS_SEPARATOR(name[pos])) break;
if (name[pos] < 32 || strchrW( invalid_charsW, name[pos] ))
return STATUS_OBJECT_NAME_INVALID;
}
if (pos > MAX_DIR_ENTRY_LEN)
return STATUS_OBJECT_NAME_INVALID;
name += pos;
name_len -= pos;
if (pos == name_len) /* no subdir, plain DOS device */
return get_dos_device( name, name_len, unix_name_ret );
/* check for UNC prefix */
if (name_len > 4 && !memicmpW( name, uncW, 4 ))
{
name += 3;
name_len -= 3;
is_unc = TRUE;
}
else
{
/* check for a drive letter with path */
if (name_len < 3 || !isalphaW(name[0]) || name[1] != ':' || !IS_SEPARATOR(name[2]))
{
/* not a drive with path, try other DOS devices */
return get_dos_device( name, name_len, unix_name_ret );
}
name += 2; /* skip drive letter */
name_len -= 2;
}
for (prefix_len = 0; prefix_len < pos; prefix_len++)
prefix[prefix_len] = tolowerW(name[prefix_len]);
/* check for invalid characters */
name += prefix_len;
name_len -= prefix_len;
/* check for invalid characters (all chars except 0 are valid for unix) */
is_unix = (prefix_len == 4 && !memcmp( prefix, unixW, sizeof(unixW) ));
if (is_unix)
{
for (p = name; p < name + name_len; p++)
if (!*p) return STATUS_OBJECT_NAME_INVALID;
check_case = TRUE;
}
else
{
for (p = name; p < name + name_len; p++)
if (*p < 32 || strchrW( invalid_charsW, *p )) return STATUS_OBJECT_NAME_INVALID;
unix_len = ntdll_wcstoumbs( 0, name, name_len, NULL, 0, NULL, NULL );
unix_len += MAX_DIR_ENTRY_LEN + 3;
unix_len += strlen(config_dir) + sizeof("/dosdevices/") + 3;
if (!(unix_name = RtlAllocateHeap( GetProcessHeap(), 0, unix_len )))
return STATUS_NO_MEMORY;
strcpy( unix_name, config_dir );
strcat( unix_name, "/dosdevices/" );
pos = strlen(unix_name);
if (is_unc)
{
strcpy( unix_name + pos, "unc" );
pos += 3;
}
else
{
unix_name[pos++] = tolowerW( name[-2] );
unix_name[pos++] = ':';
unix_name[pos] = 0;
}
}
else /* no DOS prefix, assume NT native name, map directly to Unix */
unix_len = ntdll_wcstoumbs( 0, prefix, prefix_len, NULL, 0, NULL, NULL );
unix_len += ntdll_wcstoumbs( 0, name, name_len, NULL, 0, NULL, NULL );
unix_len += MAX_DIR_ENTRY_LEN + 3;
unix_len += strlen(config_dir) + sizeof("/dosdevices/");
if (!(unix_name = RtlAllocateHeap( GetProcessHeap(), 0, unix_len )))
return STATUS_NO_MEMORY;
strcpy( unix_name, config_dir );
strcat( unix_name, "/dosdevices/" );
pos = strlen(unix_name);
ret = ntdll_wcstoumbs( 0, prefix, prefix_len, unix_name + pos, unix_len - pos - 1,
NULL, &used_default );
if (!ret || used_default)
{
if (!name_len || !IS_SEPARATOR(name[0])) return STATUS_OBJECT_NAME_INVALID;
unix_len = ntdll_wcstoumbs( 0, name, name_len, NULL, 0, NULL, NULL );
unix_len += MAX_DIR_ENTRY_LEN + 3;
if (!(unix_name = RtlAllocateHeap( GetProcessHeap(), 0, unix_len )))
return STATUS_NO_MEMORY;
pos = 0;
RtlFreeHeap( GetProcessHeap(), 0, unix_name );
return STATUS_OBJECT_NAME_INVALID;
}
pos += ret;
/* check if prefix exists (except for DOS drives to avoid extra stat calls) */
if (prefix_len != 2 || prefix[1] != ':')
{
unix_name[pos] = 0;
if (lstat( unix_name, &st ) == -1 && errno == ENOENT)
{
if (!is_unix)
{
RtlFreeHeap( GetProcessHeap(), 0, unix_name );
return STATUS_BAD_DEVICE_TYPE;
}
pos = 0; /* fall back to unix root */
}
}
/* try a shortcut first */