AT_EXIT(9)

NAME
at_exit, rm_at_exit - ask that a function be run at exit

SYNOPSIS
#include <sys/types.h>
#include <sys/systm.h>
typedef void (exitlist_fn) (struct proc *);

int
at_exit(exitlist_fn func);
int
rm_at_exit(exitlist_fn func);

DESCRIPTION
The at_exit facility allows a kernel module to ensure that it is notified at any process exit. The function func is called with the a pointer to the exiting process's proc structure.

If the requirement for notification is removed, then the function rm_at_exit() must be called with the exact func argument as the corresponding call to at_exit().

RETURN VALUES
The at_exit() function returns an errno, 0 meaning success. The rm_at_exit() function returns the number of items removed (should be 0 or 1).

SEE ALSO
_exit(2)

HISTORY
The at_exit() function appeared in FreeBSD 2.2.

AUTHORS
The function was written by Julian Elischer <julian@FreeBSD.org>.