IoSetShareAccessEx - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// wdm.h

VOID IoSetShareAccessEx(
  [in]           ACCESS_MASK   DesiredAccess,
  [in]           ULONG         DesiredShareAccess,
  [in, out]      PFILE_OBJECT  FileObject,
  [out]          PSHARE_ACCESS ShareAccess,
  [in, optional] PBOOLEAN      WritePermission
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-wdm-iosetshareaccessex)

IoSetShareAccessEx function

Description

The IoSetShareAccessEx routine sets the access rights for sharing the specified file object.

Parameters

DesiredAccess [in]

Specifies an ACCESS_MASK value that represents the type of access requested for the file object. See IoCreateFile for a complete list of system-defined DesiredAccess flags.

DesiredShareAccess [in]

Specifies the type of share access to be set for the file object. This value can be zero, or any combination of the following flags:

FILE_SHARE_READ

FILE_SHARE_WRITE

FILE_SHARE_DELETE

FileObject [in, out]

A pointer to the file object whose share access is being set or reset.

ShareAccess [out]

A pointer to the SHARE_ACCESS structure that is associated with FileObject. Drivers should treat this structure as opaque.

WritePermission [in, optional]

A pointer to the value that specifies whether the file object has write permission. This value is TRUE if the share has write permission; otherwise, it is FALSE. If the value is FALSE and the caller attempts to take exclusive read access, the write permission is downgraded to FILE_SHARE_READ.

See also

ACCESS_MASK

IoCreateFile

View the official Windows Driver Kit DDI reference

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