reactos/ntoskrnl/io/symlink.c

   1 /* $Id: symlink.c,v 1.34 2004/08/15 16:39:03 chorns Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/io/symlink.c
   6  * PURPOSE:         Implements symbolic links
   7  * PROGRAMMER:      David Welch (welch@mcmail.com)
   8  * UPDATE HISTORY:
   9  *                  Created 22/05/98
  10  */
  11
  12 /* INCLUDES *****************************************************************/
  13
  14 #include <ntoskrnl.h>
  15 #define NDEBUG
  16 #include <internal/debug.h>
  17
  18
  19 /* FUNCTIONS ****************************************************************/
  20
  21 /**********************************************************************
  22  * NAME                                                 EXPORTED
  23  *      IoCreateSymbolicLink
  24  *
  25  * DESCRIPTION
  26  *
  27  * ARGUMENTS
  28  *
  29  * RETURN VALUE
  30  *
  31  * REVISIONS
  32  *
  33  * @implemented
  34  */
  35 NTSTATUS STDCALL
  36 IoCreateSymbolicLink(PUNICODE_STRING SymbolicLinkName,
  37                      PUNICODE_STRING DeviceName)
  38 {
  39   OBJECT_ATTRIBUTES ObjectAttributes;
  40   HANDLE Handle;
  41   NTSTATUS Status;
  42
  43   assert_irql(PASSIVE_LEVEL);
  44
  45   DPRINT("IoCreateSymbolicLink(SymbolicLinkName %wZ, DeviceName %wZ)\n",
  46          SymbolicLinkName,
  47          DeviceName);
  48
  49   InitializeObjectAttributes(&ObjectAttributes,
  50                              SymbolicLinkName,
  51                              OBJ_PERMANENT,
  52                              NULL,
  53                              SePublicDefaultSd);
  54
  55   Status = NtCreateSymbolicLinkObject(&Handle,
  56                                       SYMBOLIC_LINK_ALL_ACCESS,
  57                                       &ObjectAttributes,
  58                                       DeviceName);
  59   if (!NT_SUCCESS(Status))
  60     {
  61       DPRINT1("NtCreateSymbolicLinkObject() failed (Status %lx)\n", Status);
  62       return(Status);
  63     }
  64
  65   NtClose(Handle);
  66
  67   return(STATUS_SUCCESS);
  68 }
  69
  70
  71 /**********************************************************************
  72  * NAME                                                 EXPORTED
  73  *      IoCreateUnprotectedSymbolicLink
  74  *
  75  * DESCRIPTION
  76  *
  77  * ARGUMENTS
  78  *
  79  * RETURN VALUE
  80  *
  81  * REVISIONS
  82  *
  83  * @implemented
  84  */
  85 NTSTATUS STDCALL
  86 IoCreateUnprotectedSymbolicLink(PUNICODE_STRING SymbolicLinkName,
  87                                 PUNICODE_STRING DeviceName)
  88 {
  89   SECURITY_DESCRIPTOR SecurityDescriptor;
  90   OBJECT_ATTRIBUTES ObjectAttributes;
  91   HANDLE Handle;
  92   NTSTATUS Status;
  93
  94   assert_irql(PASSIVE_LEVEL);
  95
  96   DPRINT("IoCreateUnprotectedSymbolicLink(SymbolicLinkName %wZ, DeviceName %wZ)\n",
  97          SymbolicLinkName,
  98          DeviceName);
  99
 100   Status = RtlCreateSecurityDescriptor(&SecurityDescriptor,
 101                                        SECURITY_DESCRIPTOR_REVISION);
 102   if (!NT_SUCCESS(Status))
 103     {
 104       DPRINT1("RtlCreateSecurityDescriptor() failed (Status %lx)\n", Status);
 105       return(Status);
 106     }
 107
 108   Status = RtlSetDaclSecurityDescriptor(&SecurityDescriptor,
 109                                         TRUE,
 110                                         NULL,
 111                                         TRUE);
 112   if (!NT_SUCCESS(Status))
 113     {
 114       DPRINT1("RtlSetDaclSecurityDescriptor() failed (Status %lx)\n", Status);
 115       return(Status);
 116     }
 117
 118   InitializeObjectAttributes(&ObjectAttributes,
 119                              SymbolicLinkName,
 120                              OBJ_PERMANENT,
 121                              NULL,
 122                              &SecurityDescriptor);
 123
 124   Status = NtCreateSymbolicLinkObject(&Handle,
 125                                       SYMBOLIC_LINK_ALL_ACCESS,
 126                                       &ObjectAttributes,
 127                                       DeviceName);
 128   if (!NT_SUCCESS(Status))
 129     {
 130       DPRINT1("NtCreateSymbolicLinkObject() failed (Status %lx)\n", Status);
 131       return(Status);
 132     }
 133
 134   NtClose(Handle);
 135
 136   return(STATUS_SUCCESS);
 137 }
 138
 139
 140 /**********************************************************************
 141  * NAME                                                 EXPORTED
 142  *      IoDeleteSymbolicLink
 143  *
 144  * DESCRIPTION
 145  *
 146  * ARGUMENTS
 147  *
 148  * RETURN VALUE
 149  *
 150  * REVISIONS
 151  *
 152  * @implemented
 153  */
 154 NTSTATUS STDCALL
 155 IoDeleteSymbolicLink(PUNICODE_STRING SymbolicLinkName)
 156 {
 157   OBJECT_ATTRIBUTES ObjectAttributes;
 158   HANDLE Handle;
 159   NTSTATUS Status;
 160
 161   assert_irql(PASSIVE_LEVEL);
 162
 163   DPRINT("IoDeleteSymbolicLink (SymbolicLinkName %S)\n",
 164          SymbolicLinkName->Buffer);
 165
 166   InitializeObjectAttributes(&ObjectAttributes,
 167                              SymbolicLinkName,
 168                              OBJ_OPENLINK,
 169                              NULL,
 170                              NULL);
 171
 172   Status = NtOpenSymbolicLinkObject(&Handle,
 173                                     SYMBOLIC_LINK_ALL_ACCESS,
 174                                     &ObjectAttributes);
 175   if (!NT_SUCCESS(Status))
 176     return(Status);
 177
 178   Status = NtMakeTemporaryObject(Handle);
 179   NtClose(Handle);
 180
 181   return(Status);
 182 }
 183
 184 /* EOF */