reactos/ntoskrnl/io/iomgr/symlink.c

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            ntoskrnl/io/symlink.c
   5  * PURPOSE:         I/O Wrappers for Symbolic Links
   6  * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
   7  *                  Eric Kohl
   8  */
   9
  10 /* INCLUDES *****************************************************************/
  11
  12 #include <ntoskrnl.h>
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 /* FUNCTIONS ****************************************************************/
  17
  18 /*
  19  * @implemented
  20  */
  21 NTSTATUS
  22 NTAPI
  23 IoCreateSymbolicLink(IN PUNICODE_STRING SymbolicLinkName,
  24                      IN PUNICODE_STRING DeviceName)
  25 {
  26     OBJECT_ATTRIBUTES ObjectAttributes;
  27     HANDLE Handle;
  28     NTSTATUS Status;
  29     PAGED_CODE();
  30
  31     /* Initialize the object attributes and create the link */
  32     InitializeObjectAttributes(&ObjectAttributes,
  33                                SymbolicLinkName,
  34                                OBJ_PERMANENT | OBJ_CASE_INSENSITIVE,
  35                                NULL,
  36                                SePublicDefaultSd);
  37     Status = ZwCreateSymbolicLinkObject(&Handle,
  38                                         SYMBOLIC_LINK_ALL_ACCESS,
  39                                         &ObjectAttributes,
  40                                         DeviceName);
  41     if (NT_SUCCESS(Status)) ZwClose(Handle);
  42
  43     /* Return status */
  44     return Status;
  45 }
  46
  47 /*
  48  * @implemented
  49  */
  50 NTSTATUS
  51 NTAPI
  52 IoCreateUnprotectedSymbolicLink(IN PUNICODE_STRING SymbolicLinkName,
  53                                 IN PUNICODE_STRING DeviceName)
  54 {
  55     SECURITY_DESCRIPTOR SecurityDescriptor;
  56     OBJECT_ATTRIBUTES ObjectAttributes;
  57     HANDLE Handle;
  58     NTSTATUS Status;
  59     PAGED_CODE();
  60
  61     /* Create an SD */
  62     Status = RtlCreateSecurityDescriptor(&SecurityDescriptor,
  63                                          SECURITY_DESCRIPTOR_REVISION);
  64     if (!NT_SUCCESS(Status)) return Status;
  65
  66     /* Set the DACL */
  67     Status = RtlSetDaclSecurityDescriptor(&SecurityDescriptor,
  68                                           TRUE,
  69                                           NULL,
  70                                           TRUE);
  71     if (!NT_SUCCESS(Status)) return Status;
  72
  73     /* Initialize the object attributes and create the link */
  74     InitializeObjectAttributes(&ObjectAttributes,
  75                                SymbolicLinkName,
  76                                OBJ_PERMANENT | OBJ_CASE_INSENSITIVE,
  77                                NULL,
  78                                &SecurityDescriptor);
  79     Status = ZwCreateSymbolicLinkObject(&Handle,
  80                                         SYMBOLIC_LINK_ALL_ACCESS,
  81                                         &ObjectAttributes,
  82                                         DeviceName);
  83     if (NT_SUCCESS(Status)) ZwClose(Handle);
  84
  85     /* Return status */
  86     return Status;
  87 }
  88
  89 /*
  90  * @implemented
  91  */
  92 NTSTATUS
  93 NTAPI
  94 IoDeleteSymbolicLink(IN PUNICODE_STRING SymbolicLinkName)
  95 {
  96     OBJECT_ATTRIBUTES ObjectAttributes;
  97     HANDLE Handle;
  98     NTSTATUS Status;
  99     PAGED_CODE();
 100
 101     /* Initialize the object attributes and open the link */
 102     InitializeObjectAttributes(&ObjectAttributes,
 103                                SymbolicLinkName,
 104                                OBJ_CASE_INSENSITIVE,
 105                                NULL,
 106                                NULL);
 107     Status = ZwOpenSymbolicLinkObject(&Handle, DELETE, &ObjectAttributes);
 108     if (!NT_SUCCESS(Status)) return Status;
 109
 110     /* Make the link temporary and close its handle */
 111     Status = ZwMakeTemporaryObject(Handle);
 112     if (NT_SUCCESS(Status)) ZwClose(Handle);
 113
 114     /* Return status */
 115     return Status;
 116 }
 117
 118 /* EOF */