PKON
Section: System Calls (2)
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NAME
pkon, pkoff - establish packet protocol
SYNOPSIS
pkon(fd, size)
pkoff(fd)
DESCRIPTION
Pkon
establishes packet protocol (see
pk(4))
on the open character special file whose file
descriptor is
fd.
Size
is a desired packet size, a power of 2 in the range
32<size<4096.
The size is negotiated with a remote packet driver,
and a possibly smaller actual packet size is returned.
An asynchronous line used for packet
communication should be in raw mode;
see
tty(4).
Pkoff
turns off the packet driver on the channel whose
file descriptor is
fd.
SEE ALSO
pk(4), pkopen(3), tty(4), signal(2)
DIAGNOSTICS
Pkon
returns -1 if
fd
does not describe an open file, or if
packet communication cannot
be established.
Pkoff
returns -1 for an unknown file descriptor.
Writing on a packet driver link that has been shut down
by
close
or
pkoff
at the other end raises signal SIGPIPE
in the writing process.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- SEE ALSO
-
- DIAGNOSTICS
-
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