proc_signal(9f) [opensolaris man page]

proc_signal(9F) 					   Kernel Functions for Drivers 					   proc_signal(9F)

NAME

       proc_signal, proc_ref, proc_unref - send a signal to a process

SYNOPSIS

       #include <sys/ddi.h>
       #include <sys/sunddi.h>
       #include <sys/signal.h>

       void *proc_ref(void)

       voidproc_unref(void *pref);

       int proc_signal(void *pref, int sig);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

PARAMETERS

       pref    A handle for the process to be signalled.

       sig     Signal number to be sent to the process.

DESCRIPTION

       This  set of routines allows a driver to send a signal to a process. The routine proc_ref() is used to retrieve an unambiguous reference to
       the process for signalling purposes. The return value can be used as a unique handle on the process, even if the process dies. Because sys-
       tem  resources  are  committed to a process reference, proc_unref() should be used to remove it as soon as it is no longer needed.proc_sig-
       nal() is used to send signal sig to the referenced process. The following set of signals may be sent to a process from a driver:

       SIGHUP	   The device has been disconnected.

       SIGINT	   The interrupt character has been received.

       SIGQUIT	   The quit character has been received.

       SIGPOLL	   A pollable event has occurred.

       SIGKILL	   Kill the process (cannot be caught or ignored).

       SIGWINCH    Window size change.

       SIGURG	   Urgent data are available.

       See signal.h(3HEAD) for more details on the meaning of these signals.

       If the process has exited at the time the signal was sent, proc_signal() returns an error code; the caller should remove the  reference	on
       the process by calling proc_unref().

       The driver writer must ensure that for each call made to proc_ref(), there is exactly one corresponding call to proc_unref().

RETURN VALUES

       The proc_ref() returns the following:

       pref    An opaque handle used to refer to the current process.

       The proc_signal() returns the following:

       0     The process existed before the signal was sent.

       -1    The process no longer exists; no signal was sent.

CONTEXT

       The  proc_unref()  and  proc_signal()  functions  can  be called from user, interrupt, or kernel context. The proc_ref() function should be
       called only from user context.

SEE ALSO

       signal.h(3HEAD), putnextctl1(9F)

       Writing Device Drivers

SunOS 5.11							    16 Jan 2006 						   proc_signal(9F)