DEV_MODULE(9) BSD Kernel Developer's Manual DEV_MODULE(9)NAMEDEV_MODULE — device driver module declaration macro
SYNOPSIS
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/conf.h>
DEV_MODULE(name, modeventhand_t evh, void *arg);
DESCRIPTION
The DEV_MODULE() macro declares a device driver kernel module. It fills
in a moduledata_t structure and then calls DECLARE_MODULE() with the cor‐
rect args, where name is the name of the module and evh (with its argu‐
ment arg) is the event handler for the module (refer to DECLARE_MODULE(9)
for more information). The event handler is supposed to create the
device with make_dev() on load and to destroy it when it is unloaded
using destroy_dev().
EXAMPLES
#include <sys/module.h>
#include <sys/conf.h>
static struct cdevsw foo_devsw = { ... };
static dev_t sdev;
static int
foo_load(module_t mod, int cmd, void *arg)
{
int err = 0;
switch (cmd) {
case MOD_LOAD:
sdev = make_dev(&foo_devsw, 0, UID_ROOT, GID_WHEEL, 0600, "foo");
break; /* Success*/
case MOD_UNLOAD:
case MOD_SHUTDOWN:
destroy_dev(sdev);
break; /* Success*/
default:
err = EINVAL;
break;
}
return(err);
}
DEV_MODULE(foo, foo_load, NULL);
SEE ALSODECLARE_MODULE(9), destroy_dev(9), make_dev(9), module(9)AUTHORS
This manual page was written by Alexander Langer ⟨alex@FreeBSD.org⟩.
BSD March 11, 2001 BSD
