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/*
* Ntdll path functions
*
* Copyright 2002, 2003 Alexandre Julliard
* Copyright 2003 Eric Pouech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winternl.h"
#include "wine/unicode.h"
#include "wine/debug.h"
#include "ntdll_misc.h"
WINE_DEFAULT_DEBUG_CHANNEL(file);
static const WCHAR DeviceRootW[] = {'\\','\\','.','\\',0};
static const WCHAR NTDosPrefixW[] = {'\\','?','?','\\',0};
static const WCHAR UncPfxW[] = {'U','N','C','\\',0};
#define IS_SEPARATOR(ch) ((ch) == '\\' || (ch) == '/')
/***********************************************************************
* RtlDetermineDosPathNameType_U (NTDLL.@)
*/
DOS_PATHNAME_TYPE WINAPI RtlDetermineDosPathNameType_U( PCWSTR path )
{
if (IS_SEPARATOR(path[0]))
{
if (!IS_SEPARATOR(path[1])) return ABSOLUTE_PATH; /* "/foo" */
if (path[2] != '.') return UNC_PATH; /* "//foo" */
if (IS_SEPARATOR(path[3])) return DEVICE_PATH; /* "//./foo" */
if (path[3]) return UNC_PATH; /* "//.foo" */
return UNC_DOT_PATH; /* "//." */
}
else
{
if (!path[0] || path[1] != ':') return RELATIVE_PATH; /* "foo" */
if (IS_SEPARATOR(path[2])) return ABSOLUTE_DRIVE_PATH; /* "c:/foo" */
return RELATIVE_DRIVE_PATH; /* "c:foo" */
}
}
/******************************************************************
* RtlDoesFileExists_U
*
* FIXME: should not use CreateFileW
*/
BOOLEAN WINAPI RtlDoesFileExists_U(LPCWSTR file_name)
{
HANDLE handle = CreateFileW( file_name, 0, FILE_SHARE_READ|FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, 0 );
if (handle == INVALID_HANDLE_VALUE) return FALSE;
NtClose( handle );
return TRUE;
}
/***********************************************************************
* RtlIsDosDeviceName_U (NTDLL.@)
*
* Check if the given DOS path contains a DOS device name.
*
* Returns the length of the device name in the low word and its
* position in the high word (both in bytes, not WCHARs), or 0 if no
* device name is found.
*/
ULONG WINAPI RtlIsDosDeviceName_U( PCWSTR dos_name )
{
static const WCHAR consoleW[] = {'\\','\\','.','\\','C','O','N',0};
static const WCHAR auxW[3] = {'A','U','X'};
static const WCHAR comW[3] = {'C','O','M'};
static const WCHAR conW[3] = {'C','O','N'};
static const WCHAR lptW[3] = {'L','P','T'};
static const WCHAR nulW[3] = {'N','U','L'};
static const WCHAR prnW[3] = {'P','R','N'};
const WCHAR *start, *end, *p;
switch(RtlDetermineDosPathNameType_U( dos_name ))
{
case INVALID_PATH:
case UNC_PATH:
return 0;
case DEVICE_PATH:
if (!strcmpiW( dos_name, consoleW ))
return MAKELONG( sizeof(conW), 4 * sizeof(WCHAR) ); /* 4 is length of \\.\ prefix */
return 0;
default:
break;
}
end = dos_name + strlenW(dos_name) - 1;
if (end >= dos_name && *end == ':') end--; /* remove trailing ':' */
/* find start of file name */
for (start = end; start >= dos_name; start--)
{
if (IS_SEPARATOR(start[0])) break;
/* check for ':' but ignore if before extension (for things like NUL:.txt) */
if (start[0] == ':' && start[1] != '.') break;
}
start++;
/* remove extension */
if ((p = strchrW( start, '.' )))
{
end = p - 1;
if (end >= dos_name && *end == ':') end--; /* remove trailing ':' before extension */
}
else
{
/* no extension, remove trailing spaces */
while (end >= dos_name && *end == ' ') end--;
}
/* now we have a potential device name between start and end, check it */
switch(end - start + 1)
{
case 3:
if (strncmpiW( start, auxW, 3 ) &&
strncmpiW( start, conW, 3 ) &&
strncmpiW( start, nulW, 3 ) &&
strncmpiW( start, prnW, 3 )) break;
return MAKELONG( 3 * sizeof(WCHAR), (start - dos_name) * sizeof(WCHAR) );
case 4:
if (strncmpiW( start, comW, 3 ) && strncmpiW( start, lptW, 3 )) break;
if (*end <= '0' || *end > '9') break;
return MAKELONG( 4 * sizeof(WCHAR), (start - dos_name) * sizeof(WCHAR) );
default: /* can't match anything */
break;
}
return 0;
}
/**************************************************************************
* RtlDosPathNameToNtPathName_U [NTDLL.@]
*
* dos_path: a DOS path name (fully qualified or not)
* ntpath: pointer to a UNICODE_STRING to hold the converted
* path name
* file_part:will point (in ntpath) to the file part in the path
* cd: directory reference (optional)
*
* FIXME:
* + fill the cd structure
*/
BOOLEAN WINAPI RtlDosPathNameToNtPathName_U(PWSTR dos_path,
PUNICODE_STRING ntpath,
PWSTR* file_part,
CURDIR* cd)
{
static const WCHAR LongFileNamePfxW[4] = {'\\','\\','?','\\'};
ULONG sz, ptr_sz, offset;
WCHAR local[MAX_PATH];
LPWSTR ptr;
TRACE("(%s,%p,%p,%p)\n",
debugstr_w(dos_path), ntpath, file_part, cd);
if (cd)
{
FIXME("Unsupported parameter\n");
memset(cd, 0, sizeof(*cd));
}
if (!dos_path || !*dos_path) return FALSE;
if (!memcmp(dos_path, LongFileNamePfxW, sizeof(LongFileNamePfxW)))
{
dos_path += sizeof(LongFileNamePfxW) / sizeof(WCHAR);
ptr = NULL;
ptr_sz = 0;
}
else
{
ptr = local;
ptr_sz = sizeof(local);
}
sz = RtlGetFullPathName_U(dos_path, ptr_sz, ptr, file_part);
if (sz == 0) return FALSE;
if (sz > ptr_sz)
{
ptr = RtlAllocateHeap(ntdll_get_process_heap(), 0, sz);
sz = RtlGetFullPathName_U(dos_path, sz, ptr, file_part);
}
ntpath->MaximumLength = sz + (4 /* unc\ */ + 4 /* \??\ */) * sizeof(WCHAR);
ntpath->Buffer = RtlAllocateHeap(ntdll_get_process_heap(), 0, ntpath->MaximumLength);
if (!ntpath->Buffer)
{
if (ptr != local) RtlFreeHeap(ntdll_get_process_heap(), 0, ptr);
return FALSE;
}
strcpyW(ntpath->Buffer, NTDosPrefixW);
offset = 0;
switch (RtlDetermineDosPathNameType_U(ptr))
{
case UNC_PATH: /* \\foo */
if (ptr[2] != '?')
{
offset = 2;
strcatW(ntpath->Buffer, UncPfxW);
}
break;
case DEVICE_PATH: /* \\.\foo */
offset = 4;
break;
default: break; /* needed to keep gcc quiet */
}
strcatW(ntpath->Buffer, ptr + offset);
ntpath->Length = strlenW(ntpath->Buffer) * sizeof(WCHAR);
if (file_part && *file_part)
*file_part = ntpath->Buffer + ntpath->Length / sizeof(WCHAR) - strlenW(*file_part);
/* FIXME: cd filling */
if (ptr != local) RtlFreeHeap(ntdll_get_process_heap(), 0, ptr);
return TRUE;
}
/******************************************************************
* RtlDosSearchPath_U
*
* Searchs a file of name 'name' into a ';' separated list of paths
* (stored in paths)
* Doesn't seem to search elsewhere than the paths list
* Stores the result in buffer (file_part will point to the position
* of the file name in the buffer)
* FIXME:
* - how long shall the paths be ??? (MAX_PATH or larger with \\?\ constructs ???)
*/
ULONG WINAPI RtlDosSearchPath_U(LPCWSTR paths, LPCWSTR search, LPCWSTR ext,
ULONG buffer_size, LPWSTR buffer,
LPWSTR* file_part)
{
DOS_PATHNAME_TYPE type = RtlDetermineDosPathNameType_U(search);
ULONG len = 0;
if (type == RELATIVE_PATH)
{
ULONG allocated = 0, needed, filelen;
WCHAR *name = NULL;
filelen = 1 /* for \ */ + strlenW(search) + 1 /* \0 */;
/* Windows only checks for '.' without worrying about path components */
if (strchrW( search, '.' )) ext = NULL;
if (ext != NULL) filelen += strlenW(ext);
while (*paths)
{
LPCWSTR ptr;
for (needed = 0, ptr = paths; *ptr != 0 && *ptr++ != ';'; needed++);
if (needed + filelen > allocated)
{
name = (WCHAR*)RtlReAllocateHeap(ntdll_get_process_heap(), 0,
name, (needed + filelen) * sizeof(WCHAR));
if (!name) return 0;
allocated = needed + filelen;
}
memmove(name, paths, needed * sizeof(WCHAR));
/* append '\\' if none is present */
if (needed > 0 && name[needed - 1] != '\\') name[needed++] = '\\';
strcpyW(&name[needed], search);
if (ext) strcatW(&name[needed], ext);
if (RtlDoesFileExists_U(name))
{
len = RtlGetFullPathName_U(name, buffer_size, buffer, file_part);
break;
}
paths = ptr;
}
RtlFreeHeap(ntdll_get_process_heap(), 0, name);
}
else if (RtlDoesFileExists_U(search))
{
len = RtlGetFullPathName_U(search, buffer_size, buffer, file_part);
}
return len;
}
/******************************************************************
* get_full_path_helper
*
* Helper for RtlGetFullPathName_U
*/
static ULONG get_full_path_helper(LPCWSTR name, LPWSTR buffer, ULONG size)
{
ULONG reqsize, mark = 0;
DOS_PATHNAME_TYPE type;
LPWSTR ptr;
UNICODE_STRING* cd;
reqsize = sizeof(WCHAR); /* '\0' at the end */
RtlAcquirePebLock();
cd = &ntdll_get_process_pmts()->CurrentDirectoryName;
switch (type = RtlDetermineDosPathNameType_U(name))
{
case UNC_PATH: /* \\foo */
case DEVICE_PATH: /* \\.\foo */
if (reqsize <= size) buffer[0] = '\0';
break;
case ABSOLUTE_DRIVE_PATH: /* c:\foo */
reqsize += sizeof(WCHAR);
if (reqsize <= size)
{
buffer[0] = toupperW(name[0]);
buffer[1] = '\0';
}
name++;
break;
case RELATIVE_DRIVE_PATH: /* c:foo */
if (toupperW(name[0]) != toupperW(cd->Buffer[0]) || cd->Buffer[1] != ':')
{
WCHAR drive[4];
UNICODE_STRING var, val;
drive[0] = '=';
drive[1] = name[0];
drive[2] = ':';
drive[3] = '\0';
var.Length = 6;
var.MaximumLength = 8;
var.Buffer = drive;
val.Length = 0;
val.MaximumLength = size;
val.Buffer = buffer;
name += 2;
switch (RtlQueryEnvironmentVariable_U(NULL, &var, &val))
{
case STATUS_SUCCESS:
/* FIXME: Win2k seems to check that the environment variable actually points
* to an existing directory. If not, root of the drive is used
* (this seems also to be the only spot in RtlGetFullPathName that the
* existence of a part of a path is checked)
*/
/* fall thru */
case STATUS_BUFFER_TOO_SMALL:
reqsize += val.Length;
/* append trailing \\ */
reqsize += sizeof(WCHAR);
if (reqsize <= size)
{
buffer[reqsize / sizeof(WCHAR) - 2] = '\\';
buffer[reqsize / sizeof(WCHAR) - 1] = '\0';
}
break;
case STATUS_VARIABLE_NOT_FOUND:
reqsize += 3 * sizeof(WCHAR);
if (reqsize <= size)
{
buffer[0] = drive[1];
buffer[1] = ':';
buffer[2] = '\\';
buffer[3] = '\0';
}
break;
default:
ERR("Unsupported status code\n");
break;
}
break;
}
name += 2;
/* fall through */
case RELATIVE_PATH: /* foo */
reqsize += cd->Length;
if (reqsize <= size)
{
memcpy(buffer, cd->Buffer, cd->Length);
buffer[cd->Length / sizeof(WCHAR)] = 0;
}
if (cd->Buffer[1] != ':')
{
ptr = strchrW(cd->Buffer + 2, '\\');
if (ptr) ptr = strchrW(ptr + 1, '\\');
if (!ptr) ptr = cd->Buffer + strlenW(cd->Buffer);
mark = ptr - cd->Buffer;
}
break;
case ABSOLUTE_PATH: /* \xxx */
if (cd->Buffer[1] == ':')
{
reqsize += 2 * sizeof(WCHAR);
if (reqsize <= size)
{
buffer[0] = cd->Buffer[0];
buffer[1] = ':';
buffer[2] = '\0';
}
}
else
{
unsigned len;
ptr = strchrW(cd->Buffer + 2, '\\');
if (ptr) ptr = strchrW(ptr + 1, '\\');
if (!ptr) ptr = cd->Buffer + strlenW(cd->Buffer);
len = (ptr - cd->Buffer) * sizeof(WCHAR);
reqsize += len;
mark = len / sizeof(WCHAR);
if (reqsize <= size)
{
memcpy(buffer, cd->Buffer, len);
buffer[len / sizeof(WCHAR)] = '\0';
}
else
buffer[0] = '\0';
}
break;
case UNC_DOT_PATH: /* \\. */
reqsize += 4 * sizeof(WCHAR);
name += 3;
if (reqsize <= size)
{
buffer[0] = '\\';
buffer[1] = '\\';
buffer[2] = '.';
buffer[3] = '\\';
buffer[4] = '\0';
}
break;
case INVALID_PATH:
reqsize = 0;
goto done;
}
reqsize += strlenW(name) * sizeof(WCHAR);
if (reqsize > size) goto done;
strcatW(buffer, name);
/* convert every / into a \ */
for (ptr = buffer; ptr < buffer + size / sizeof(WCHAR); ptr++)
if (*ptr == '/') *ptr = '\\';
reqsize -= sizeof(WCHAR); /* don't count trailing \0 */
/* mark is non NULL for UNC names, so start path collapsing after server & share name
* otherwise, it's a fully qualified DOS name, so start after the drive designation
*/
for (ptr = buffer + (mark ? mark : 2); ptr < buffer + reqsize / sizeof(WCHAR); )
{
WCHAR* p = strchrW(ptr, '\\');
if (!p) break;
p++;
if (p[0] == '.')
{
switch (p[1])
{
case '.':
switch (p[2])
{
case '\\':
{
WCHAR* prev = p - 2;
while (prev >= buffer + mark && *prev != '\\') prev--;
/* either collapse \foo\.. into \ or \.. into \ */
if (prev < buffer + mark) prev = p - 1;
reqsize -= (p + 2 - prev) * sizeof(WCHAR);
memmove(prev, p + 2, buffer + reqsize - prev + sizeof(WCHAR));
p = prev;
}
break;
case '\0':
reqsize -= 2 * sizeof(WCHAR);
*p = 0;
break;
}
break;
case '\\':
reqsize -= 2 * sizeof(WCHAR);
memmove(ptr, ptr + 2, buffer + reqsize - ptr + sizeof(WCHAR));
break;
}
}
ptr = p;
}
done:
RtlReleasePebLock();
return reqsize;
}
/******************************************************************
* RtlGetFullPathName_U (NTDLL.@)
*
* Returns the number of bytes written to buffer (not including the
* terminating NULL) if the function succeeds, or the required number of bytes
* (including the terminating NULL) if the buffer is too small.
*
* file_part will point to the filename part inside buffer (except if we use
* DOS device name, in which case file_in_buf is NULL)
*
*/
DWORD WINAPI RtlGetFullPathName_U(const WCHAR* name, ULONG size, WCHAR* buffer,
WCHAR** file_part)
{
WCHAR* ptr;
DWORD dosdev;
DWORD reqsize;
TRACE("(%s %lu %p %p)\n", debugstr_w(name), size, buffer, file_part);
if (!name || !*name) return 0;
if (file_part) *file_part = NULL;
/* check for DOS device name */
dosdev = RtlIsDosDeviceName_U(name);
if (dosdev)
{
DWORD offset = HIWORD(dosdev) / sizeof(WCHAR); /* get it in WCHARs, not bytes */
DWORD sz = LOWORD(dosdev); /* in bytes */
if (8 + sz + 2 > size) return sz + 10;
strcpyW(buffer, DeviceRootW);
memmove(buffer + 4, name + offset, sz);
buffer[4 + sz / sizeof(WCHAR)] = '\0';
/* file_part isn't set in this case */
return sz + 8;
}
reqsize = get_full_path_helper(name, buffer, size);
if (reqsize > size)
{
LPWSTR tmp = RtlAllocateHeap(ntdll_get_process_heap(), 0, reqsize);
reqsize = get_full_path_helper(name, tmp, reqsize);
if (reqsize > size) /* it may have worked the second time */
{
RtlFreeHeap(ntdll_get_process_heap(), 0, tmp);
return reqsize + sizeof(WCHAR);
}
memcpy( buffer, tmp, reqsize + sizeof(WCHAR) );
RtlFreeHeap(ntdll_get_process_heap(), 0, tmp);
}
/* find file part */
if (file_part && (ptr = strrchrW(buffer, '\\')) != NULL && ptr >= buffer + 2 && *++ptr)
*file_part = ptr;
return reqsize;
}
/*************************************************************************
* RtlGetLongestNtPathLength [NTDLL.@]
*
* Get the longest allowed path length
*
* PARAMS
* None.
*
* RETURNS
* The longest allowed path length (277 characters under Win2k).
*/
DWORD WINAPI RtlGetLongestNtPathLength(void)
{
return 277;
}
/******************************************************************
* RtlIsNameLegalDOS8Dot3 (NTDLL.@)
*
* Returns TRUE iff unicode is a valid DOS (8+3) name.
* If the name is valid, oem gets filled with the corresponding OEM string
* spaces is set to TRUE if unicode contains spaces
*/
BOOLEAN WINAPI RtlIsNameLegalDOS8Dot3( const UNICODE_STRING *unicode,
OEM_STRING *oem, BOOLEAN *spaces )
{
int dot = -1;
unsigned int i;
char buffer[12];
OEM_STRING oem_str;
BOOLEAN got_space = FALSE;
if (!oem)
{
oem_str.Length = sizeof(buffer);
oem_str.MaximumLength = sizeof(buffer);
oem_str.Buffer = buffer;
oem = &oem_str;
}
if (RtlUpcaseUnicodeStringToCountedOemString( oem, unicode, FALSE ) != STATUS_SUCCESS)
return FALSE;
if (oem->Length > 12) return FALSE;
/* a starting . is invalid, except for . and .. */
if (oem->Buffer[0] == '.')
{
if (oem->Length != 1 && (oem->Length != 2 || oem->Buffer[1] != '.')) return FALSE;
if (spaces) *spaces = FALSE;
return TRUE;
}
for (i = 0; i < oem->Length; i++)
{
switch (oem->Buffer[i])
{
case ' ':
/* leading/trailing spaces not allowed */
if (!i || i == oem->Length-1 || oem->Buffer[i+1] == '.') return FALSE;
got_space = TRUE;
break;
case '.':
if (dot != -1) return FALSE;
dot = i;
break;
default:
/* FIXME: check for invalid chars */
break;
}
}
/* check file part is shorter than 8, extension shorter than 3
* dot cannot be last in string
*/
if (dot == -1)
{
if (oem->Length > 8) return FALSE;
}
else
{
if (dot > 8 || (oem->Length - dot > 4) || dot == oem->Length - 1) return FALSE;
}
if (spaces) *spaces = got_space;
return TRUE;
}
/******************************************************************
* RtlGetCurrentDirectory_U (NTDLL.@)
*
*/
NTSTATUS WINAPI RtlGetCurrentDirectory_U(ULONG buflen, LPWSTR buf)
{
UNICODE_STRING* us;
ULONG len;
TRACE("(%lu %p)\n", buflen, buf);
RtlAcquirePebLock();
us = &ntdll_get_process_pmts()->CurrentDirectoryName;
len = us->Length / sizeof(WCHAR);
if (us->Buffer[len - 1] == '\\' && us->Buffer[len - 2] != ':')
len--;
if (buflen / sizeof(WCHAR) > len)
{
memcpy(buf, us->Buffer, len * sizeof(WCHAR));
buf[len] = '\0';
}
else
{
len++;
}
RtlReleasePebLock();
return len * sizeof(WCHAR);
}
/******************************************************************
* RtlSetCurrentDirectory_U (NTDLL.@)
*
*/
NTSTATUS WINAPI RtlSetCurrentDirectory_U(const UNICODE_STRING* dir)
{
UNICODE_STRING* curdir;
NTSTATUS nts = STATUS_SUCCESS;
ULONG size;
PWSTR buf = NULL;
TRACE("(%s)\n", debugstr_w(dir->Buffer));
RtlAcquirePebLock();
curdir = &ntdll_get_process_pmts()->CurrentDirectoryName;
size = curdir->MaximumLength;
buf = RtlAllocateHeap(ntdll_get_process_heap(), 0, size);
if (buf == NULL)
{
nts = STATUS_NO_MEMORY;
goto out;
}
size = RtlGetFullPathName_U(dir->Buffer, size, buf, 0);
if (!size)
{
nts = STATUS_OBJECT_NAME_INVALID;
goto out;
}
switch (RtlDetermineDosPathNameType_U(buf))
{
case ABSOLUTE_DRIVE_PATH:
case UNC_PATH:
break;
default:
FIXME("Don't support those cases yes\n");
nts = STATUS_NOT_IMPLEMENTED;
goto out;
}
/* FIXME: should check that the directory actually exists,
* and fill CurrentDirectoryHandle accordingly
*/
/* append trailing \ if missing */
if (buf[size / sizeof(WCHAR) - 1] != '\\')
{
buf[size / sizeof(WCHAR)] = '\\';
buf[size / sizeof(WCHAR) + 1] = '\0';
size += sizeof(WCHAR);
}
memmove(curdir->Buffer, buf, size + sizeof(WCHAR));
curdir->Length = size;
#if 0
if (curdir->Buffer[1] == ':')
{
UNICODE_STRING env;
WCHAR var[4];
var[0] = '=';
var[1] = curdir->Buffer[0];
var[2] = ':';
var[3] = 0;
env.Length = 3 * sizeof(WCHAR);
env.MaximumLength = 4 * sizeof(WCHAR);
env.Buffer = var;
RtlSetEnvironmentVariable(NULL, &env, curdir);
}
#endif
out:
if (buf) RtlFreeHeap(ntdll_get_process_heap(), 0, buf);
RtlReleasePebLock();
return nts;
}
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