system/wine
system/wine
1
0
Fork 0
mirror of git://source.winehq.org/git/wine.git synced 2024-11-01 13:09:57 +00:00
Code Issues Projects Releases Packages Wiki Activity
wine/dlls/ntdll/path.c
Alexandre Julliard 0adec25f92 ntdll: Build the PE side without -DWINE_NO_LONG_TYPES.
2022-11-21 18:03:53 +01:00

989 lines
31 KiB
C
Raw Blame History

/*
* Ntdll path functions
*
* Copyright 2002, 2003, 2004 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <sys/types.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winioctl.h"
#include "wine/debug.h"
#include "ntdll_misc.h"
WINE_DEFAULT_DEBUG_CHANNEL(file);
#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] != '.' && path[2] != '?') return UNC_PATH; /* "//foo" */
if (IS_SEPARATOR(path[3])) return DEVICE_PATH; /* "//./foo" or "//?/foo" */
if (path[3]) return UNC_PATH; /* "//.foo" or "//?foo" */
return UNC_DOT_PATH; /* "//." or "//?" */
}
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" */
}
}
/***********************************************************************
* 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 auxW[] = {'A','U','X'};
static const WCHAR comW[] = {'C','O','M'};
static const WCHAR conW[] = {'C','O','N'};
static const WCHAR lptW[] = {'L','P','T'};
static const WCHAR nulW[] = {'N','U','L'};
static const WCHAR prnW[] = {'P','R','N'};
static const WCHAR coninW[] = {'C','O','N','I','N','$'};
static const WCHAR conoutW[] = {'C','O','N','O','U','T','$'};
const WCHAR *start, *end, *p;
switch(RtlDetermineDosPathNameType_U( dos_name ))
{
case INVALID_PATH:
case UNC_PATH:
return 0;
case DEVICE_PATH:
if (!wcsicmp( dos_name, L"\\\\.\\CON" ))
return MAKELONG( sizeof(conW), 4 * sizeof(WCHAR) ); /* 4 is length of \\.\ prefix */
return 0;
case ABSOLUTE_DRIVE_PATH:
case RELATIVE_DRIVE_PATH:
start = dos_name + 2; /* skip drive letter */
break;
default:
start = dos_name;
break;
}
/* find start of file name */
for (p = start; *p; p++) if (IS_SEPARATOR(*p)) start = p + 1;
/* truncate at extension and ':' */
for (end = start; *end; end++) if (*end == '.' || *end == ':') break;
end--;
/* remove trailing spaces */
while (end >= start && *end == ' ') end--;
/* now we have a potential device name between start and end, check it */
switch(end - start + 1)
{
case 3:
if (wcsnicmp( start, auxW, 3 ) &&
wcsnicmp( start, conW, 3 ) &&
wcsnicmp( start, nulW, 3 ) &&
wcsnicmp( start, prnW, 3 )) break;
return MAKELONG( 3 * sizeof(WCHAR), (start - dos_name) * sizeof(WCHAR) );
case 4:
if (wcsnicmp( start, comW, 3 ) && wcsnicmp( start, lptW, 3 )) break;
if (*end <= '0' || *end > '9') break;
return MAKELONG( 4 * sizeof(WCHAR), (start - dos_name) * sizeof(WCHAR) );
case 6:
if (wcsnicmp( start, coninW, ARRAY_SIZE(coninW) )) break;
return MAKELONG( sizeof(coninW), (start - dos_name) * sizeof(WCHAR) );
case 7:
if (wcsnicmp( start, conoutW, ARRAY_SIZE(conoutW) )) break;
return MAKELONG( sizeof(conoutW), (start - dos_name) * sizeof(WCHAR) );
default: /* can't match anything */
break;
}
return 0;
}
/******************************************************************
* is_valid_directory
*
* Helper for RtlDosPathNameToNtPathName_U_WithStatus.
* Test if the path is an existing directory.
*/
static BOOL is_valid_directory(LPCWSTR path)
{
OBJECT_ATTRIBUTES attr;
UNICODE_STRING ntpath;
IO_STATUS_BLOCK io;
HANDLE handle;
NTSTATUS nts;
if (!RtlDosPathNameToNtPathName_U(path, &ntpath, NULL, NULL))
return FALSE;
attr.Length = sizeof(attr);
attr.RootDirectory = 0;
attr.Attributes = OBJ_CASE_INSENSITIVE;
attr.ObjectName = &ntpath;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
nts = NtOpenFile(&handle, FILE_READ_ATTRIBUTES | SYNCHRONIZE, &attr, &io,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT);
RtlFreeUnicodeString(&ntpath);
if (nts != STATUS_SUCCESS)
return FALSE;
NtClose(handle);
return TRUE;
}
/**************************************************************************
* RtlDosPathNameToNtPathName_U_WithStatus [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
*/
NTSTATUS WINAPI RtlDosPathNameToNtPathName_U_WithStatus(const WCHAR *dos_path, UNICODE_STRING *ntpath,
WCHAR **file_part, CURDIR *cd)
{
static const WCHAR global_prefix[] = {'\\','\\','?','\\'};
static const WCHAR global_prefix2[] = {'\\','?','?','\\'};
NTSTATUS nts = STATUS_SUCCESS;
ULONG sz, offset, dosdev;
WCHAR local[MAX_PATH];
LPWSTR ptr = local;
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 STATUS_OBJECT_NAME_INVALID;
if (!memcmp(dos_path, global_prefix, sizeof(global_prefix)) ||
(!memcmp(dos_path, global_prefix2, sizeof(global_prefix2)) && dos_path[4]) ||
!wcsicmp( dos_path, L"\\\\.\\CON" ))
{
ntpath->Length = wcslen(dos_path) * sizeof(WCHAR);
ntpath->MaximumLength = ntpath->Length + sizeof(WCHAR);
ntpath->Buffer = RtlAllocateHeap(GetProcessHeap(), 0, ntpath->MaximumLength);
if (!ntpath->Buffer) return STATUS_NO_MEMORY;
memcpy( ntpath->Buffer, dos_path, ntpath->MaximumLength );
ntpath->Buffer[1] = '?'; /* change \\?\ to \??\ */
ntpath->Buffer[2] = '?';
if (file_part)
{
if ((ptr = wcsrchr( ntpath->Buffer, '\\' )) && ptr[1]) *file_part = ptr + 1;
else *file_part = NULL;
}
return STATUS_SUCCESS;
}
dosdev = RtlIsDosDeviceName_U(dos_path);
if ((offset = HIWORD(dosdev)))
{
sz = offset + sizeof(WCHAR);
if (sz > sizeof(local) &&
(!(ptr = RtlAllocateHeap(GetProcessHeap(), 0, sz))))
return STATUS_NO_MEMORY;
memcpy(ptr, dos_path, offset);
ptr[offset/sizeof(WCHAR)] = '\0';
if (!is_valid_directory(ptr))
{
nts = STATUS_OBJECT_NAME_INVALID;
goto out;
}
if (file_part) *file_part = NULL;
sz = LOWORD(dosdev);
wcscpy(ptr, L"\\\\.\\");
memcpy(ptr + 4, dos_path + offset / sizeof(WCHAR), sz);
ptr[4 + sz / sizeof(WCHAR)] = '\0';
sz += 4 * sizeof(WCHAR);
}
else
{
sz = RtlGetFullPathName_U(dos_path, sizeof(local), ptr, file_part);
if (sz == 0) return STATUS_OBJECT_NAME_INVALID;
if (sz > sizeof(local))
{
if (!(ptr = RtlAllocateHeap(GetProcessHeap(), 0, sz))) return STATUS_NO_MEMORY;
sz = RtlGetFullPathName_U(dos_path, sz, ptr, file_part);
}
}
sz += (1 /* NUL */ + 4 /* unc\ */ + 4 /* \??\ */) * sizeof(WCHAR);
if (sz > MAXWORD)
{
nts = STATUS_OBJECT_NAME_INVALID;
goto out;
}
ntpath->MaximumLength = sz;
ntpath->Buffer = RtlAllocateHeap(GetProcessHeap(), 0, ntpath->MaximumLength);
if (!ntpath->Buffer)
{
nts = STATUS_NO_MEMORY;
goto out;
}
wcscpy(ntpath->Buffer, L"\\??\\");
switch (RtlDetermineDosPathNameType_U(ptr))
{
case UNC_PATH: /* \\foo */
offset = 2;
wcscat(ntpath->Buffer, L"UNC\\");
break;
case DEVICE_PATH: /* \\.\foo */
offset = 4;
break;
default:
offset = 0;
break;
}
wcscat(ntpath->Buffer, ptr + offset);
ntpath->Length = wcslen(ntpath->Buffer) * sizeof(WCHAR);
if (file_part && *file_part)
*file_part = ntpath->Buffer + ntpath->Length / sizeof(WCHAR) - wcslen(*file_part);
/* FIXME: cd filling */
out:
if (ptr != local) RtlFreeHeap(GetProcessHeap(), 0, ptr);
return nts;
}
/**************************************************************************
* RtlDosPathNameToNtPathName_U [NTDLL.@]
*
* See RtlDosPathNameToNtPathName_U_WithStatus
*/
BOOLEAN WINAPI RtlDosPathNameToNtPathName_U(PCWSTR dos_path,
PUNICODE_STRING ntpath,
PWSTR* file_part,
CURDIR* cd)
{
return RtlDosPathNameToNtPathName_U_WithStatus(dos_path, ntpath, file_part, cd) == STATUS_SUCCESS;
}
/**************************************************************************
* RtlDosPathNameToRelativeNtPathName_U_WithStatus [NTDLL.@]
*
* See RtlDosPathNameToNtPathName_U_WithStatus (except the last parameter)
*/
NTSTATUS WINAPI RtlDosPathNameToRelativeNtPathName_U_WithStatus(const WCHAR *dos_path,
UNICODE_STRING *ntpath, WCHAR **file_part, RTL_RELATIVE_NAME *relative)
{
TRACE("(%s,%p,%p,%p)\n", debugstr_w(dos_path), ntpath, file_part, relative);
if (relative)
{
FIXME("Unsupported parameter\n");
memset(relative, 0, sizeof(*relative));
}
/* FIXME: fill parameter relative */
return RtlDosPathNameToNtPathName_U_WithStatus(dos_path, ntpath, file_part, NULL);
}
/**************************************************************************
* RtlDosPathNameToRelativeNtPathName_U [NTDLL.@]
*/
BOOLEAN WINAPI RtlDosPathNameToRelativeNtPathName_U(const WCHAR *dos_path, UNICODE_STRING *ntpath,
WCHAR **file_part, RTL_RELATIVE_NAME *relative)
{
return RtlDosPathNameToRelativeNtPathName_U_WithStatus(dos_path, ntpath, file_part, relative) == STATUS_SUCCESS;
}
/**************************************************************************
* RtlReleaseRelativeName [NTDLL.@]
*/
void WINAPI RtlReleaseRelativeName(RTL_RELATIVE_NAME *relative)
{
}
/******************************************************************
* RtlDosSearchPath_U
*
* Searches 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 \ */ + wcslen(search) + 1 /* \0 */;
/* Windows only checks for '.' without worrying about path components */
if (wcschr( search, '.' )) ext = NULL;
if (ext != NULL) filelen += wcslen(ext);
while (*paths)
{
LPCWSTR ptr;
for (needed = 0, ptr = paths; *ptr != 0 && *ptr++ != ';'; needed++);
if (needed + filelen > allocated)
{
if (!name) name = RtlAllocateHeap(GetProcessHeap(), 0,
(needed + filelen) * sizeof(WCHAR));
else
{
WCHAR *newname = RtlReAllocateHeap(GetProcessHeap(), 0, name,
(needed + filelen) * sizeof(WCHAR));
if (!newname) RtlFreeHeap(GetProcessHeap(), 0, name);
name = newname;
}
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++] = '\\';
wcscpy(&name[needed], search);
if (ext) wcscat(&name[needed], ext);
if (RtlDoesFileExists_U(name))
{
len = RtlGetFullPathName_U(name, buffer_size, buffer, file_part);
break;
}
paths = ptr;
}
RtlFreeHeap(GetProcessHeap(), 0, name);
}
else if (RtlDoesFileExists_U(search))
{
len = RtlGetFullPathName_U(search, buffer_size, buffer, file_part);
}
return len;
}
/******************************************************************
* collapse_path
*
* Helper for RtlGetFullPathName_U.
* Get rid of . and .. components in the path.
*/
static inline void collapse_path( WCHAR *path, UINT mark )
{
WCHAR *p, *next;
/* convert every / into a \ */
for (p = path; *p; p++) if (*p == '/') *p = '\\';
/* collapse duplicate backslashes */
next = path + max( 1, mark );
for (p = next; *p; p++) if (*p != '\\' || next[-1] != '\\') *next++ = *p;
*next = 0;
p = path + mark;
while (*p)
{
if (*p == '.')
{
switch(p[1])
{
case '\\': /* .\ component */
next = p + 2;
memmove( p, next, (wcslen(next) + 1) * sizeof(WCHAR) );
continue;
case 0: /* final . */
if (p > path + mark) p--;
*p = 0;
continue;
case '.':
if (p[2] == '\\') /* ..\ component */
{
next = p + 3;
if (p > path + mark)
{
p--;
while (p > path + mark && p[-1] != '\\') p--;
}
memmove( p, next, (wcslen(next) + 1) * sizeof(WCHAR) );
continue;
}
else if (!p[2]) /* final .. */
{
if (p > path + mark)
{
p--;
while (p > path + mark && p[-1] != '\\') p--;
if (p > path + mark) p--;
}
*p = 0;
continue;
}
break;
}
}
/* skip to the next component */
while (*p && *p != '\\') p++;
if (*p == '\\')
{
/* remove last dot in previous dir name */
if (p > path + mark && p[-1] == '.') memmove( p-1, p, (wcslen(p) + 1) * sizeof(WCHAR) );
else p++;
}
}
/* remove trailing spaces and dots (yes, Windows really does that, don't ask) */
while (p > path + mark && (p[-1] == ' ' || p[-1] == '.')) p--;
*p = 0;
}
/******************************************************************
* skip_unc_prefix
*
* Skip the \\share\dir\ part of a file name. Helper for RtlGetFullPathName_U.
*/
static const WCHAR *skip_unc_prefix( const WCHAR *ptr )
{
ptr += 2;
while (*ptr && !IS_SEPARATOR(*ptr)) ptr++; /* share name */
while (IS_SEPARATOR(*ptr)) ptr++;
while (*ptr && !IS_SEPARATOR(*ptr)) ptr++; /* dir name */
while (IS_SEPARATOR(*ptr)) ptr++;
return ptr;
}
/******************************************************************
* get_full_path_helper
*
* Helper for RtlGetFullPathName_U
* Note: name and buffer are allowed to point to the same memory spot
*/
static ULONG get_full_path_helper(LPCWSTR name, LPWSTR buffer, ULONG size)
{
ULONG reqsize = 0, mark = 0, dep = 0, deplen;
LPWSTR ins_str = NULL;
LPCWSTR ptr;
const UNICODE_STRING* cd;
WCHAR tmp[4];
/* return error if name only consists of spaces */
for (ptr = name; *ptr; ptr++) if (*ptr != ' ') break;
if (!*ptr) return 0;
RtlAcquirePebLock();
if (NtCurrentTeb()->Tib.SubSystemTib) /* FIXME: hack */
cd = &((WIN16_SUBSYSTEM_TIB *)NtCurrentTeb()->Tib.SubSystemTib)->curdir.DosPath;
else
cd = &NtCurrentTeb()->Peb->ProcessParameters->CurrentDirectory.DosPath;
switch (RtlDetermineDosPathNameType_U(name))
{
case UNC_PATH: /* \\foo */
ptr = skip_unc_prefix( name );
mark = (ptr - name);
break;
case DEVICE_PATH: /* \\.\foo */
mark = 4;
break;
case ABSOLUTE_DRIVE_PATH: /* c:\foo */
reqsize = sizeof(WCHAR);
tmp[0] = name[0];
ins_str = tmp;
dep = 1;
mark = 3;
break;
case RELATIVE_DRIVE_PATH: /* c:foo */
dep = 2;
if (wcsnicmp( name, cd->Buffer, 2 ))
{
UNICODE_STRING var, val;
tmp[0] = '=';
tmp[1] = name[0];
tmp[2] = ':';
tmp[3] = '\0';
var.Length = 3 * sizeof(WCHAR);
var.MaximumLength = 4 * sizeof(WCHAR);
var.Buffer = tmp;
val.Length = 0;
val.MaximumLength = size;
val.Buffer = RtlAllocateHeap(GetProcessHeap(), 0, size);
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 through */
case STATUS_BUFFER_TOO_SMALL:
reqsize = val.Length + sizeof(WCHAR); /* append trailing '\\' */
val.Buffer[val.Length / sizeof(WCHAR)] = '\\';
ins_str = val.Buffer;
break;
case STATUS_VARIABLE_NOT_FOUND:
reqsize = 3 * sizeof(WCHAR);
tmp[0] = name[0];
tmp[1] = ':';
tmp[2] = '\\';
ins_str = tmp;
RtlFreeHeap(GetProcessHeap(), 0, val.Buffer);
break;
default:
ERR("Unsupported status code\n");
RtlFreeHeap(GetProcessHeap(), 0, val.Buffer);
break;
}
mark = 3;
break;
}
/* fall through */
case RELATIVE_PATH: /* foo */
reqsize = cd->Length;
ins_str = cd->Buffer;
if (cd->Buffer[1] != ':')
{
ptr = skip_unc_prefix( cd->Buffer );
mark = ptr - cd->Buffer;
}
else mark = 3;
break;
case ABSOLUTE_PATH: /* \xxx */
if (name[0] == '/') /* may be a Unix path */
{
char *unix_name;
WCHAR *nt_str;
ULONG buflen;
NTSTATUS status;
UNICODE_STRING str;
OBJECT_ATTRIBUTES attr;
nt_str = RtlAllocateHeap( GetProcessHeap(), 0, (wcslen(name) + 9) * sizeof(WCHAR) );
wcscpy( nt_str, L"\\??\\unix" );
wcscat( nt_str, name );
RtlInitUnicodeString( &str, nt_str );
InitializeObjectAttributes( &attr, &str, 0, 0, NULL );
buflen = 3 * wcslen(name) + 1;
unix_name = RtlAllocateHeap( GetProcessHeap(), 0, buflen );
status = wine_nt_to_unix_file_name( &attr, unix_name, &buflen, FILE_OPEN_IF );
if (!status || status == STATUS_NO_SUCH_FILE)
{
buflen = wcslen(name) + 9;
status = wine_unix_to_nt_file_name( unix_name, nt_str, &buflen );
}
RtlFreeHeap( GetProcessHeap(), 0, unix_name );
if (!status && buflen > 6 && nt_str[5] == ':')
{
reqsize = (buflen - 4) * sizeof(WCHAR);
if (reqsize <= size)
{
memcpy( buffer, nt_str + 4, reqsize );
collapse_path( buffer, 3 );
reqsize -= sizeof(WCHAR);
}
RtlFreeHeap( GetProcessHeap(), 0, nt_str );
goto done;
}
RtlFreeHeap( GetProcessHeap(), 0, nt_str );
}
if (cd->Buffer[1] == ':')
{
reqsize = 2 * sizeof(WCHAR);
tmp[0] = cd->Buffer[0];
tmp[1] = ':';
ins_str = tmp;
mark = 3;
}
else
{
ptr = skip_unc_prefix( cd->Buffer );
reqsize = (ptr - cd->Buffer) * sizeof(WCHAR);
mark = reqsize / sizeof(WCHAR);
ins_str = cd->Buffer;
}
break;
case UNC_DOT_PATH: /* \\. */
reqsize = 4 * sizeof(WCHAR);
dep = 3;
tmp[0] = '\\';
tmp[1] = '\\';
tmp[2] = '.';
tmp[3] = '\\';
ins_str = tmp;
mark = 4;
break;
case INVALID_PATH:
goto done;
}
/* enough space ? */
deplen = wcslen(name + dep) * sizeof(WCHAR);
if (reqsize + deplen + sizeof(WCHAR) > size)
{
/* not enough space, return need size (including terminating '\0') */
reqsize += deplen + sizeof(WCHAR);
goto done;
}
memmove(buffer + reqsize / sizeof(WCHAR), name + dep, deplen + sizeof(WCHAR));
if (reqsize) memcpy(buffer, ins_str, reqsize);
if (ins_str != tmp && ins_str != cd->Buffer)
RtlFreeHeap(GetProcessHeap(), 0, ins_str);
collapse_path( buffer, mark );
reqsize = wcslen(buffer) * sizeof(WCHAR);
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;
wcscpy(buffer, L"\\\\.\\");
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) return 0;
if (reqsize > size)
{
LPWSTR tmp = RtlAllocateHeap(GetProcessHeap(), 0, reqsize);
reqsize = get_full_path_helper(name, tmp, reqsize);
if (reqsize + sizeof(WCHAR) > size) /* it may have worked the second time */
{
RtlFreeHeap(GetProcessHeap(), 0, tmp);
return reqsize + sizeof(WCHAR);
}
memcpy( buffer, tmp, reqsize + sizeof(WCHAR) );
RtlFreeHeap(GetProcessHeap(), 0, tmp);
}
/* find file part */
if (file_part && (ptr = wcsrchr(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 MAX_NT_PATH_LENGTH;
}
/******************************************************************
* RtlDoesFileExists_U (NTDLL.@)
*/
BOOLEAN WINAPI RtlDoesFileExists_U(LPCWSTR file_name)
{
UNICODE_STRING nt_name;
FILE_BASIC_INFORMATION basic_info;
OBJECT_ATTRIBUTES attr;
NTSTATUS status;
if (!RtlDosPathNameToNtPathName_U( file_name, &nt_name, NULL, NULL )) return FALSE;
InitializeObjectAttributes( &attr, &nt_name, OBJ_CASE_INSENSITIVE, 0, NULL );
status = NtQueryAttributesFile(&attr, &basic_info);
RtlFreeUnicodeString( &nt_name );
return !status;
}
/******************************************************************
* 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 )
{
static const char illegal[] = "*?<>|\"+=,;[]:/\\\345";
int dot = -1;
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->Length > 0 && 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:
if (strchr(illegal, oem->Buffer[i])) return FALSE;
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.@)
*
*/
ULONG WINAPI RtlGetCurrentDirectory_U(ULONG buflen, LPWSTR buf)
{
UNICODE_STRING* us;
ULONG len;
TRACE("(%lu %p)\n", buflen, buf);
RtlAcquirePebLock();
if (NtCurrentTeb()->Tib.SubSystemTib) /* FIXME: hack */
us = &((WIN16_SUBSYSTEM_TIB *)NtCurrentTeb()->Tib.SubSystemTib)->curdir.DosPath;
else
us = &NtCurrentTeb()->Peb->ProcessParameters->CurrentDirectory.DosPath;
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)
{
FILE_FS_DEVICE_INFORMATION device_info;
OBJECT_ATTRIBUTES attr;
UNICODE_STRING newdir;
IO_STATUS_BLOCK io;
CURDIR *curdir;
HANDLE handle;
NTSTATUS nts;
ULONG size;
PWSTR ptr;
newdir.Buffer = NULL;
RtlAcquirePebLock();
if (NtCurrentTeb()->Tib.SubSystemTib) /* FIXME: hack */
curdir = &((WIN16_SUBSYSTEM_TIB *)NtCurrentTeb()->Tib.SubSystemTib)->curdir;
else
curdir = &NtCurrentTeb()->Peb->ProcessParameters->CurrentDirectory;
if (!RtlDosPathNameToNtPathName_U( dir->Buffer, &newdir, NULL, NULL ))
{
nts = STATUS_OBJECT_NAME_INVALID;
goto out;
}
attr.Length = sizeof(attr);
attr.RootDirectory = 0;
attr.Attributes = OBJ_CASE_INSENSITIVE;
attr.ObjectName = &newdir;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
nts = NtOpenFile( &handle, FILE_TRAVERSE | SYNCHRONIZE, &attr, &io, FILE_SHARE_READ | FILE_SHARE_WRITE,
FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
if (nts != STATUS_SUCCESS) goto out;
/* don't keep the directory handle open on removable media */
if (!NtQueryVolumeInformationFile( handle, &io, &device_info,
sizeof(device_info), FileFsDeviceInformation ) &&
(device_info.Characteristics & FILE_REMOVABLE_MEDIA))
{
NtClose( handle );
handle = 0;
}
if (curdir->Handle) NtClose( curdir->Handle );
curdir->Handle = handle;
/* append trailing \ if missing */
size = newdir.Length / sizeof(WCHAR);
ptr = newdir.Buffer;
ptr += 4; /* skip \??\ prefix */
size -= 4;
if (size && ptr[size - 1] != '\\') ptr[size++] = '\\';
/* convert \??\UNC\ path to \\ prefix */
if (size >= 4 && !wcsnicmp(ptr, L"UNC\\", 4))
{
ptr += 2;
size -= 2;
*ptr = '\\';
}
memcpy( curdir->DosPath.Buffer, ptr, size * sizeof(WCHAR));
curdir->DosPath.Buffer[size] = 0;
curdir->DosPath.Length = size * sizeof(WCHAR);
TRACE( "curdir now %s %p\n", debugstr_w(curdir->DosPath.Buffer), curdir->Handle );
out:
RtlFreeUnicodeString( &newdir );
RtlReleasePebLock();
return nts;
}
Reference in a new issue View git blame Copy permalink