DLPI_FD(3DLPI) Data Link Provider Interface Library Functions

NAME

dlpi_fd - get DLPI file descriptor

SYNOPSIS

cc [ flag ... ] file ... -ldlpi [ library ... ]
#include <libdlpi.h>

int dlpi_fd(dlpi_handle_t dh);

DESCRIPTION

The dlpi_fd() function returns the integer file descriptor that can
be used to directly operate on the open DLPI stream associated with
the DLPI handle dh. This file descriptor can be used to perform
non-DLPI operations that do not alter the state of the DLPI stream,
such as waiting for an event using poll(2), or pushing and
configuring additional STREAMS modules, such as pfmod(4M). If DLPI
operations are directly performed on the file descriptor, or a
STREAMS module is pushed that alters the message-passing interface
such that DLPI operations can no longer be issued, future operations
on dh might not behave as documented.


The returned file descriptor is managed by libdlpi(3LIB) and the
descriptor must not be closed.

RETURN VALUES

The function returns the integer file descriptor associated with the
DLPI handle dh. If dh is invalid, -1 is returned.

ATTRIBUTES

See attributes(7) for description of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Committed |
+--------------------+-----------------+
|MT-Level | Safe |
+--------------------+-----------------+

SEE ALSO

poll(2), libdlpi(3LIB), pfmod(4M), dlpi(4P), attributes(7)

June 15, 2007 DLPI_FD(3DLPI)