Access Rights to Named Pipes

The handle returned by the CreateNamedPipe function always has SYNCHRONIZE access. It also has GENERIC_READ, GENERIC_WRITE, or both, depending on the open mode of the pipe. The following are the access rights for each open mode.

Open mode	Access rights
PIPE_ACCESS_DUPLEX	GENERIC_READ, GENERIC_WRITE, and SYNCHRONIZE
PIPE_ACCESS_INBOUND	GENERIC_READ and SYNCHRONIZE
PIPE_ACCESS_OUTBOUND	GENERIC_WRITE and SYNCHRONIZE

GENERIC_READ access for a named pipe combines STANDARD_RIGHTS_READ access with rights that allow the process to read data from the named pipe and to read named-pipe attributes.

GENERIC_WRITE access for a named pipe combines STANDARD_RIGHTS_WRITE with rights that allow the process to write data to the named pipe and to write named-pipe attributes.

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