KATTACH(2) LAM LOCAL LIBRARY KATTACH(2)NAME
kattach, kdetach - Attach/detach a process to/from the local LAM dae‐
mon.
SYNOPSIS
int kattach (int priority);
int kdetach (int pid);
DESCRIPTION
These functions allow a process to join and leave a LAM session. An
existing process running under the native operating system calls kat‐
tach() to register with the local LAM daemon. The LAM daemon must
already be running or the operation fails and an error is returned.
kattach() is eventually called by kenter(2) and is therefore typically
used in rare cases when a process wishes to change priority or return
to the LAM session after temporarily detaching. kattach() cannot be
called before kenter(2). The priority argument determines the synchro‐
nization priority of the calling process. See kenter(2).
kdetach() de-registers a process from the local LAM daemon. The
process "dies" as far as the LAM daemon is concerned. It effectively
undoes what kattach() did. kdetach() is eventually called by kexit(2)
and is therefore typically used in rare cases when a process wishes to
leave LAM control without terminating. The pid argument is the process
ID of the process to be detached. A process ID of 0 is interpreted as
a request to detach the calling process, and is the normal usage of
kdetach(). Detaching peer LAM processes is intended as an emergency
clean up measure and is not normal usage.
ERRORS
ENOKERNEL The LAM daemon is not running.
ENOTATTACHED The calling process is not a LAM process.
SEE ALSOkenter(2), kexit(2)LAM 7.1.2 March, 2006 KATTACH(2)