dlls/ntdll/om.c

   1 /*
   2  *      Object management functions
   3  *
   4  * Copyright 1999, 2000 Juergen Schmied
   5  * Copyright 2005 Vitaliy Margolen
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #ifdef HAVE_IO_H
  28 # include <io.h>
  29 #endif
  30 #ifdef HAVE_UNISTD_H
  31 # include <unistd.h>
  32 #endif
  33
  34 #include "ntstatus.h"
  35 #define WIN32_NO_STATUS
  36 #include "wine/debug.h"
  37 #include "windef.h"
  38 #include "winternl.h"
  39 #include "ntdll_misc.h"
  40 #include "wine/server.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
  43
  44
  45 /*
  46  *      Generic object functions
  47  */
  48
  49 /******************************************************************************
  50  * NtQueryObject [NTDLL.@]
  51  * ZwQueryObject [NTDLL.@]
  52  */
  53 NTSTATUS WINAPI NtQueryObject(IN HANDLE handle,
  54                               IN OBJECT_INFORMATION_CLASS info_class,
  55                               OUT PVOID ptr, IN ULONG len, OUT PULONG used_len)
  56 {
  57     NTSTATUS status;
  58
  59     TRACE("(%p,0x%08x,%p,0x%08lx,%p): stub\n",
  60           handle, info_class, ptr, len, used_len);
  61
  62     if (used_len) *used_len = 0;
  63
  64     switch (info_class)
  65     {
  66     case ObjectDataInformation:
  67         {
  68             OBJECT_DATA_INFORMATION* p = (OBJECT_DATA_INFORMATION*)ptr;
  69
  70             if (len < sizeof(*p)) return STATUS_INVALID_BUFFER_SIZE;
  71
  72             SERVER_START_REQ( set_handle_info )
  73             {
  74                 req->handle = handle;
  75                 req->flags  = 0;
  76                 req->mask   = 0;
  77                 status = wine_server_call( req );
  78                 if (status == STATUS_SUCCESS)
  79                 {
  80                     p->InheritHandle = (reply->old_flags & HANDLE_FLAG_INHERIT) ? TRUE : FALSE;
  81                     p->ProtectFromClose = (reply->old_flags & HANDLE_FLAG_PROTECT_FROM_CLOSE) ? TRUE : FALSE;
  82                     if (used_len) *used_len = sizeof(*p);
  83                 }
  84             }
  85             SERVER_END_REQ;
  86         }
  87         break;
  88     default:
  89         FIXME("Unsupported information class %u\n", info_class);
  90         status = STATUS_NOT_IMPLEMENTED;
  91         break;
  92     }
  93     return status;
  94 }
  95
  96 /******************************************************************
  97  *              NtSetInformationObject [NTDLL.@]
  98  *              ZwSetInformationObject [NTDLL.@]
  99  *
 100  */
 101 NTSTATUS WINAPI NtSetInformationObject(IN HANDLE handle,
 102                                        IN OBJECT_INFORMATION_CLASS info_class,
 103                                        IN PVOID ptr, IN ULONG len)
 104 {
 105     NTSTATUS status;
 106
 107     TRACE("(%p,0x%08x,%p,0x%08lx): stub\n",
 108           handle, info_class, ptr, len);
 109
 110     switch (info_class)
 111     {
 112     case ObjectDataInformation:
 113         {
 114             OBJECT_DATA_INFORMATION* p = (OBJECT_DATA_INFORMATION*)ptr;
 115
 116             if (len < sizeof(*p)) return STATUS_INVALID_BUFFER_SIZE;
 117
 118             SERVER_START_REQ( set_handle_info )
 119             {
 120                 req->handle = handle;
 121                 req->flags  = 0;
 122                 req->mask   = HANDLE_FLAG_INHERIT | HANDLE_FLAG_PROTECT_FROM_CLOSE;
 123                 if (p->InheritHandle)    req->flags |= HANDLE_FLAG_INHERIT;
 124                 if (p->ProtectFromClose) req->flags |= HANDLE_FLAG_PROTECT_FROM_CLOSE;
 125                 status = wine_server_call( req );
 126             }
 127             SERVER_END_REQ;
 128         }
 129         break;
 130     default:
 131         FIXME("Unsupported information class %u\n", info_class);
 132         status = STATUS_NOT_IMPLEMENTED;
 133         break;
 134     }
 135     return status;
 136 }
 137
 138 /******************************************************************************
 139  *  NtQuerySecurityObject       [NTDLL.@]
 140  *
 141  * An ntdll analogue to GetKernelObjectSecurity().
 142  *
 143  * NOTES
 144  *  only the lowest 4 bit of SecurityObjectInformationClass are used
 145  *  0x7-0xf returns STATUS_ACCESS_DENIED (even running with system privileges)
 146  *
 147  * FIXME
 148  *  We are constructing a fake sid (Administrators:Full, System:Full, Everyone:Read)
 149  */
 150 NTSTATUS WINAPI
 151 NtQuerySecurityObject(
 152         IN HANDLE Object,
 153         IN SECURITY_INFORMATION RequestedInformation,
 154         OUT PSECURITY_DESCRIPTOR pSecurityDesriptor,
 155         IN ULONG Length,
 156         OUT PULONG ResultLength)
 157 {
 158         static SID_IDENTIFIER_AUTHORITY localSidAuthority = {SECURITY_NT_AUTHORITY};
 159         static SID_IDENTIFIER_AUTHORITY worldSidAuthority = {SECURITY_WORLD_SID_AUTHORITY};
 160         BYTE Buffer[256];
 161         PISECURITY_DESCRIPTOR_RELATIVE psd = (PISECURITY_DESCRIPTOR_RELATIVE)Buffer;
 162         UINT BufferIndex = sizeof(SECURITY_DESCRIPTOR_RELATIVE);
 163
 164         FIXME("(%p,0x%08lx,%p,0x%08lx,%p) stub!\n",
 165         Object, RequestedInformation, pSecurityDesriptor, Length, ResultLength);
 166
 167         RequestedInformation &= 0x0000000f;
 168
 169         if (RequestedInformation & SACL_SECURITY_INFORMATION) return STATUS_ACCESS_DENIED;
 170
 171         ZeroMemory(Buffer, 256);
 172         RtlCreateSecurityDescriptor((PSECURITY_DESCRIPTOR)psd, SECURITY_DESCRIPTOR_REVISION);
 173         psd->Control = SE_SELF_RELATIVE |
 174           ((RequestedInformation & DACL_SECURITY_INFORMATION) ? SE_DACL_PRESENT:0);
 175
 176         /* owner: administrator S-1-5-20-220*/
 177         if (OWNER_SECURITY_INFORMATION & RequestedInformation)
 178         {
 179           SID* psid = (SID*)&(Buffer[BufferIndex]);
 180
 181           psd->Owner = BufferIndex;
 182           BufferIndex += RtlLengthRequiredSid(2);
 183
 184           psid->Revision = SID_REVISION;
 185           psid->SubAuthorityCount = 2;
 186           psid->IdentifierAuthority = localSidAuthority;
 187           psid->SubAuthority[0] = SECURITY_BUILTIN_DOMAIN_RID;
 188           psid->SubAuthority[1] = DOMAIN_ALIAS_RID_ADMINS;
 189         }
 190
 191         /* group: built in domain S-1-5-12 */
 192         if (GROUP_SECURITY_INFORMATION & RequestedInformation)
 193         {
 194           SID* psid = (SID*) &(Buffer[BufferIndex]);
 195
 196           psd->Group = BufferIndex;
 197           BufferIndex += RtlLengthRequiredSid(1);
 198
 199           psid->Revision = SID_REVISION;
 200           psid->SubAuthorityCount = 1;
 201           psid->IdentifierAuthority = localSidAuthority;
 202           psid->SubAuthority[0] = SECURITY_LOCAL_SYSTEM_RID;
 203         }
 204
 205         /* discretionary ACL */
 206         if (DACL_SECURITY_INFORMATION & RequestedInformation)
 207         {
 208           /* acl header */
 209           PACL pacl = (PACL)&(Buffer[BufferIndex]);
 210           PACCESS_ALLOWED_ACE pace;
 211           SID* psid;
 212
 213           psd->Dacl = BufferIndex;
 214
 215           pacl->AclRevision = MIN_ACL_REVISION;
 216           pacl->AceCount = 3;
 217           pacl->AclSize = BufferIndex; /* storing the start index temporary */
 218
 219           BufferIndex += sizeof(ACL);
 220
 221           /* ACE System - full access */
 222           pace = (PACCESS_ALLOWED_ACE)&(Buffer[BufferIndex]);
 223           BufferIndex += sizeof(ACCESS_ALLOWED_ACE)-sizeof(DWORD);
 224
 225           pace->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
 226           pace->Header.AceFlags = CONTAINER_INHERIT_ACE;
 227           pace->Header.AceSize = sizeof(ACCESS_ALLOWED_ACE)-sizeof(DWORD) + RtlLengthRequiredSid(1);
 228           pace->Mask = DELETE | READ_CONTROL | WRITE_DAC | WRITE_OWNER  | 0x3f;
 229           pace->SidStart = BufferIndex;
 230
 231           /* SID S-1-5-12 (System) */
 232           psid = (SID*)&(Buffer[BufferIndex]);
 233
 234           BufferIndex += RtlLengthRequiredSid(1);
 235
 236           psid->Revision = SID_REVISION;
 237           psid->SubAuthorityCount = 1;
 238           psid->IdentifierAuthority = localSidAuthority;
 239           psid->SubAuthority[0] = SECURITY_LOCAL_SYSTEM_RID;
 240
 241           /* ACE Administrators - full access*/
 242           pace = (PACCESS_ALLOWED_ACE) &(Buffer[BufferIndex]);
 243           BufferIndex += sizeof(ACCESS_ALLOWED_ACE)-sizeof(DWORD);
 244
 245           pace->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
 246           pace->Header.AceFlags = CONTAINER_INHERIT_ACE;
 247           pace->Header.AceSize = sizeof(ACCESS_ALLOWED_ACE)-sizeof(DWORD) + RtlLengthRequiredSid(2);
 248           pace->Mask = DELETE | READ_CONTROL | WRITE_DAC | WRITE_OWNER  | 0x3f;
 249           pace->SidStart = BufferIndex;
 250
 251           /* S-1-5-12 (Administrators) */
 252           psid = (SID*)&(Buffer[BufferIndex]);
 253
 254           BufferIndex += RtlLengthRequiredSid(2);
 255
 256           psid->Revision = SID_REVISION;
 257           psid->SubAuthorityCount = 2;
 258           psid->IdentifierAuthority = localSidAuthority;
 259           psid->SubAuthority[0] = SECURITY_BUILTIN_DOMAIN_RID;
 260           psid->SubAuthority[1] = DOMAIN_ALIAS_RID_ADMINS;
 261
 262           /* ACE Everyone - read access */
 263           pace = (PACCESS_ALLOWED_ACE)&(Buffer[BufferIndex]);
 264           BufferIndex += sizeof(ACCESS_ALLOWED_ACE)-sizeof(DWORD);
 265
 266           pace->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
 267           pace->Header.AceFlags = CONTAINER_INHERIT_ACE;
 268           pace->Header.AceSize = sizeof(ACCESS_ALLOWED_ACE)-sizeof(DWORD) + RtlLengthRequiredSid(1);
 269           pace->Mask = READ_CONTROL| 0x19;
 270           pace->SidStart = BufferIndex;
 271
 272           /* SID S-1-1-0 (Everyone) */
 273           psid = (SID*)&(Buffer[BufferIndex]);
 274
 275           BufferIndex += RtlLengthRequiredSid(1);
 276
 277           psid->Revision = SID_REVISION;
 278           psid->SubAuthorityCount = 1;
 279           psid->IdentifierAuthority = worldSidAuthority;
 280           psid->SubAuthority[0] = 0;
 281
 282           /* calculate used bytes */
 283           pacl->AclSize = BufferIndex - pacl->AclSize;
 284         }
 285         *ResultLength = BufferIndex;
 286         TRACE("len=%lu\n", *ResultLength);
 287         if (Length < *ResultLength) return STATUS_BUFFER_TOO_SMALL;
 288         memcpy(pSecurityDesriptor, Buffer, *ResultLength);
 289
 290         return STATUS_SUCCESS;
 291 }
 292
 293
 294 /******************************************************************************
 295  *  NtDuplicateObject           [NTDLL.@]
 296  *  ZwDuplicateObject           [NTDLL.@]
 297  */
 298 NTSTATUS WINAPI NtDuplicateObject( HANDLE source_process, HANDLE source,
 299                                    HANDLE dest_process, PHANDLE dest,
 300                                    ACCESS_MASK access, ULONG attributes, ULONG options )
 301 {
 302     NTSTATUS ret;
 303     SERVER_START_REQ( dup_handle )
 304     {
 305         req->src_process = source_process;
 306         req->src_handle  = source;
 307         req->dst_process = dest_process;
 308         req->access      = access;
 309         req->attributes  = attributes;
 310         req->options     = options;
 311
 312         if (!(ret = wine_server_call( req )))
 313         {
 314             if (dest) *dest = reply->handle;
 315             if (reply->fd != -1) close( reply->fd );
 316         }
 317     }
 318     SERVER_END_REQ;
 319     return ret;
 320 }
 321
 322 /**************************************************************************
 323  *                 NtClose                              [NTDLL.@]
 324  *
 325  * Close a handle reference to an object.
 326  *
 327  * PARAMS
 328  *  Handle [I] handle to close
 329  *
 330  * RETURNS
 331  *  Success: ERROR_SUCCESS.
 332  *  Failure: An NTSTATUS error code.
 333  */
 334 NTSTATUS WINAPI NtClose( HANDLE Handle )
 335 {
 336     NTSTATUS ret;
 337     SERVER_START_REQ( close_handle )
 338     {
 339         req->handle = Handle;
 340         ret = wine_server_call( req );
 341         if (!ret && reply->fd != -1) close( reply->fd );
 342     }
 343     SERVER_END_REQ;
 344     return ret;
 345 }
 346
 347 /*
 348  *      Directory functions
 349  */
 350
 351 /**************************************************************************
 352  * NtOpenDirectoryObject [NTDLL.@]
 353  * ZwOpenDirectoryObject [NTDLL.@]
 354  *
 355  * Open a namespace directory object.
 356  *
 357  * PARAMS
 358  *  DirectoryHandle  [O] Destination for the new directory handle
 359  *  DesiredAccess    [I] Desired access to the directory
 360  *  ObjectAttributes [I] Structure describing the directory
 361  *
 362  * RETURNS
 363  *  Success: ERROR_SUCCESS.
 364  *  Failure: An NTSTATUS error code.
 365  */
 366 NTSTATUS WINAPI NtOpenDirectoryObject(PHANDLE DirectoryHandle, ACCESS_MASK DesiredAccess,
 367                                       POBJECT_ATTRIBUTES ObjectAttributes)
 368 {
 369     NTSTATUS ret;
 370     TRACE("(%p,0x%08lx)\n", DirectoryHandle, DesiredAccess);
 371     dump_ObjectAttributes(ObjectAttributes);
 372
 373     if (!DirectoryHandle) return STATUS_ACCESS_VIOLATION;
 374     if (!ObjectAttributes) return STATUS_INVALID_PARAMETER;
 375     /* Have to test it here because server won't know difference between
 376      * ObjectName == NULL and ObjectName == "" */
 377     if (!ObjectAttributes->ObjectName)
 378     {
 379         if (ObjectAttributes->RootDirectory)
 380             return STATUS_OBJECT_NAME_INVALID;
 381         else
 382             return STATUS_OBJECT_PATH_SYNTAX_BAD;
 383     }
 384
 385     SERVER_START_REQ(open_directory)
 386     {
 387         req->access = DesiredAccess;
 388         req->attributes = ObjectAttributes->Attributes;
 389         req->rootdir = ObjectAttributes->RootDirectory;
 390         if (ObjectAttributes->ObjectName)
 391             wine_server_add_data(req, ObjectAttributes->ObjectName->Buffer,
 392                                  ObjectAttributes->ObjectName->Length);
 393         ret = wine_server_call( req );
 394         *DirectoryHandle = reply->handle;
 395     }
 396     SERVER_END_REQ;
 397     return ret;
 398 }
 399
 400 /******************************************************************************
 401  *  NtCreateDirectoryObject     [NTDLL.@]
 402  *  ZwCreateDirectoryObject     [NTDLL.@]
 403  *
 404  * Create a namespace directory object.
 405  *
 406  * PARAMS
 407  *  DirectoryHandle  [O] Destination for the new directory handle
 408  *  DesiredAccess    [I] Desired access to the directory
 409  *  ObjectAttributes [I] Structure describing the directory
 410  *
 411  * RETURNS
 412  *  Success: ERROR_SUCCESS.
 413  *  Failure: An NTSTATUS error code.
 414  */
 415 NTSTATUS WINAPI NtCreateDirectoryObject(PHANDLE DirectoryHandle, ACCESS_MASK DesiredAccess,
 416                                         POBJECT_ATTRIBUTES ObjectAttributes)
 417 {
 418     NTSTATUS ret;
 419     TRACE("(%p,0x%08lx)\n", DirectoryHandle, DesiredAccess);
 420     dump_ObjectAttributes(ObjectAttributes);
 421
 422     if (!DirectoryHandle) return STATUS_ACCESS_VIOLATION;
 423
 424     SERVER_START_REQ(create_directory)
 425     {
 426         req->access = DesiredAccess;
 427         req->attributes = ObjectAttributes ? ObjectAttributes->Attributes : 0;
 428         req->rootdir = ObjectAttributes ? ObjectAttributes->RootDirectory : 0;
 429         if (ObjectAttributes && ObjectAttributes->ObjectName)
 430             wine_server_add_data(req, ObjectAttributes->ObjectName->Buffer,
 431                                  ObjectAttributes->ObjectName->Length);
 432         ret = wine_server_call( req );
 433         *DirectoryHandle = reply->handle;
 434     }
 435     SERVER_END_REQ;
 436     return ret;
 437 }
 438
 439 /******************************************************************************
 440  * NtQueryDirectoryObject [NTDLL.@]
 441  * ZwQueryDirectoryObject [NTDLL.@]
 442  *
 443  * Read information from a namespace directory.
 444  *
 445  * PARAMS
 446  *  DirectoryHandle   [I]   Handle to a directory object
 447  *  Buffer            [O]   Buffer to hold the read data
 448  *  BufferLength      [I]   Size of the buffer in bytes
 449  *  ReturnSingleEntry [I]   If TRUE, return a single entry, if FALSE, return as many as fit in the buffer
 450  *  RestartScan       [I]   If TRUE, start scanning from the start, if FALSE, scan from Context
 451  *  Context           [I/O] Indicates what point of the directory the scan is at
 452  *  ReturnLength      [O]   Caller supplied storage for the number of bytes written (or NULL)
 453  *
 454  * RETURNS
 455  *  Success: ERROR_SUCCESS.
 456  *  Failure: An NTSTATUS error code.
 457  */
 458 NTSTATUS WINAPI NtQueryDirectoryObject(IN HANDLE DirectoryHandle, OUT PDIRECTORY_BASIC_INFORMATION Buffer,
 459                                        IN ULONG BufferLength, IN BOOLEAN ReturnSingleEntry, IN BOOLEAN RestartScan,
 460                                        IN OUT PULONG Context, OUT PULONG ReturnLength OPTIONAL)
 461 {
 462     FIXME("(%p,%p,0x%08lx,0x%08x,0x%08x,%p,%p), stub\n", DirectoryHandle, Buffer, BufferLength, ReturnSingleEntry,
 463           RestartScan, Context, ReturnLength);
 464
 465     return STATUS_NOT_IMPLEMENTED;
 466 }
 467
 468 /*
 469  *      Link objects
 470  */
 471
 472 /******************************************************************************
 473  *  NtOpenSymbolicLinkObject    [NTDLL.@]
 474  *  ZwOpenSymbolicLinkObject    [NTDLL.@]
 475  *
 476  * Open a namespace symbolic link object.
 477  *
 478  * PARAMS
 479  *  LinkHandle       [O] Destination for the new symbolic link handle
 480  *  DesiredAccess    [I] Desired access to the symbolic link
 481  *  ObjectAttributes [I] Structure describing the symbolic link
 482  *
 483  * RETURNS
 484  *  Success: ERROR_SUCCESS.
 485  *  Failure: An NTSTATUS error code.
 486  */
 487 NTSTATUS WINAPI NtOpenSymbolicLinkObject(OUT PHANDLE LinkHandle, IN ACCESS_MASK DesiredAccess,
 488                                          IN POBJECT_ATTRIBUTES ObjectAttributes)
 489 {
 490     NTSTATUS ret;
 491     TRACE("(%p,0x%08lx,%p)\n",LinkHandle, DesiredAccess, ObjectAttributes);
 492     dump_ObjectAttributes(ObjectAttributes);
 493
 494     if (!LinkHandle) return STATUS_ACCESS_VIOLATION;
 495     if (!ObjectAttributes) return STATUS_INVALID_PARAMETER;
 496     /* Have to test it here because server won't know difference between
 497      * ObjectName == NULL and ObjectName == "" */
 498     if (!ObjectAttributes->ObjectName)
 499     {
 500         if (ObjectAttributes->RootDirectory)
 501             return STATUS_OBJECT_NAME_INVALID;
 502         else
 503             return STATUS_OBJECT_PATH_SYNTAX_BAD;
 504     }
 505
 506     SERVER_START_REQ(open_symlink)
 507     {
 508         req->access = DesiredAccess;
 509         req->attributes = ObjectAttributes->Attributes;
 510         req->rootdir = ObjectAttributes->RootDirectory;
 511         if (ObjectAttributes->ObjectName)
 512             wine_server_add_data(req, ObjectAttributes->ObjectName->Buffer,
 513                                  ObjectAttributes->ObjectName->Length);
 514         ret = wine_server_call( req );
 515         *LinkHandle = reply->handle;
 516     }
 517     SERVER_END_REQ;
 518     return ret;
 519 }
 520
 521 /******************************************************************************
 522  *  NtCreateSymbolicLinkObject  [NTDLL.@]
 523  *  ZwCreateSymbolicLinkObject  [NTDLL.@]
 524  *
 525  * Open a namespace symbolic link object.
 526  *
 527  * PARAMS
 528  *  SymbolicLinkHandle [O] Destination for the new symbolic link handle
 529  *  DesiredAccess      [I] Desired access to the symbolic link
 530  *  ObjectAttributes   [I] Structure describing the symbolic link
 531  *  TargetName         [I] Name of the target symbolic link points to
 532  *
 533  * RETURNS
 534  *  Success: ERROR_SUCCESS.
 535  *  Failure: An NTSTATUS error code.
 536  */
 537 NTSTATUS WINAPI NtCreateSymbolicLinkObject(OUT PHANDLE SymbolicLinkHandle,IN ACCESS_MASK DesiredAccess,
 538                                            IN POBJECT_ATTRIBUTES ObjectAttributes,
 539                                            IN PUNICODE_STRING TargetName)
 540 {
 541     NTSTATUS ret;
 542     TRACE("(%p,0x%08lx,%p, -> %s)\n", SymbolicLinkHandle, DesiredAccess, ObjectAttributes,
 543                                       debugstr_us(TargetName));
 544     dump_ObjectAttributes(ObjectAttributes);
 545
 546     if (!SymbolicLinkHandle || !TargetName) return STATUS_ACCESS_VIOLATION;
 547     if (!TargetName->Buffer) return STATUS_INVALID_PARAMETER;
 548
 549     SERVER_START_REQ(create_symlink)
 550     {
 551         req->access = DesiredAccess;
 552         req->attributes = ObjectAttributes ? ObjectAttributes->Attributes : 0;
 553         req->rootdir = ObjectAttributes ? ObjectAttributes->RootDirectory : 0;
 554         if (ObjectAttributes->ObjectName)
 555         {
 556             req->name_len = ObjectAttributes->ObjectName->Length;
 557             wine_server_add_data(req, ObjectAttributes->ObjectName->Buffer,
 558                                  ObjectAttributes->ObjectName->Length);
 559         }
 560         else
 561             req->name_len = 0;
 562         wine_server_add_data(req, TargetName->Buffer, TargetName->Length);
 563         ret = wine_server_call( req );
 564         *SymbolicLinkHandle = reply->handle;
 565     }
 566     SERVER_END_REQ;
 567     return ret;
 568 }
 569
 570 /******************************************************************************
 571  *  NtQuerySymbolicLinkObject   [NTDLL.@]
 572  *  ZwQuerySymbolicLinkObject   [NTDLL.@]
 573  *
 574  * Query a namespace symbolic link object target name.
 575  *
 576  * PARAMS
 577  *  LinkHandle     [I] Handle to a symbolic link object
 578  *  LinkTarget     [O] Destination for the symbolic link target
 579  *  ReturnedLength [O] Size of returned data
 580  *
 581  * RETURNS
 582  *  Success: ERROR_SUCCESS.
 583  *  Failure: An NTSTATUS error code.
 584  */
 585 NTSTATUS WINAPI NtQuerySymbolicLinkObject(IN HANDLE LinkHandle, IN OUT PUNICODE_STRING LinkTarget,
 586                                           OUT PULONG ReturnedLength OPTIONAL)
 587 {
 588     NTSTATUS ret;
 589     TRACE("(%p,%p,%p)\n", LinkHandle, LinkTarget, ReturnedLength);
 590
 591     if (!LinkTarget) return STATUS_ACCESS_VIOLATION;
 592
 593     SERVER_START_REQ(query_symlink)
 594     {
 595         req->handle = LinkHandle;
 596         wine_server_set_reply( req, LinkTarget->Buffer, LinkTarget->MaximumLength );
 597         if (!(ret = wine_server_call( req )))
 598         {
 599             LinkTarget->Length = wine_server_reply_size(reply);
 600             if (ReturnedLength) *ReturnedLength = LinkTarget->Length;
 601         }
 602     }
 603     SERVER_END_REQ;
 604     return ret;
 605 }
 606
 607 /******************************************************************************
 608  *  NtAllocateUuids   [NTDLL.@]
 609  */
 610 NTSTATUS WINAPI NtAllocateUuids(
 611         PULARGE_INTEGER Time,
 612         PULONG Range,
 613         PULONG Sequence)
 614 {
 615         FIXME("(%p,%p,%p), stub.\n", Time, Range, Sequence);
 616         return 0;
 617 }