#include <sys/ddi.h> #include <sys/sunddi.h> #include <sys/signal.h>void *proc_ref(void);
Solaris DDI specific (Solaris DDI).
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 system resources are committed to a process reference, proc_unref() should be used to remove it as soon as it is no longer needed.proc_signal() is used to send signal sig to the referenced process. The following set of signals may be sent to a process from a driver:
The device has been disconnected.
The interrupt character has been received.
The quit character has been received.
A pollable event has occurred.
Kill the process (cannot be caught or ignored).
Window size change.
Urgent data are available.
See signal(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().
An opaque handle used to refer to the current process.
The process existed before the signal was sent.
The process no longer exists; no signal was sent.
proc_unref() and proc_signal() can be called from user or interrupt context. proc_ref() should only be called from user context.