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HP-UX 11i Version 3: February 2007

Technical documentation

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fdetach — detach a STREAMS-based file descriptor from a filename


fdetach path


The fdetach command detaches or disassociates a file descriptor for an open STREAMS device or pipe from its filename in the file system. The path argument is the path that was previously associated with the file descriptor by the fattach() function.

Operations on path will subsequently affect the file system node, not the STREAMS device or pipe. The permissions and status of the node are returned to the state that they were in before the STREAMS device or pipe was attached. Any other paths that the STREAMS device or pipe may be attached to are not affected.

To successfully issue the fdetach command, the user must be superuser or must be the owner of the file and have write permission.


fdetach returns 0 (zero) on success. If fdetach fails, it returns 1 and prints a message to stderr.


To detach the file descriptor for the STREAMS file /tmp/streamfile from its associated file system node, enter:

fdetach /tmp/streamfile



NLS catalog for fdetach.

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