dev_module(9)

NAME

DEV_MODULE - device driver module declaration macro

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/conf.h>
DEV_MODULE(name, modeventhand_t evh, void *arg);

The DEV_MODULE() macro declares a device driver kernel mod
ule. It fills
in a moduledata_t structure and then calls DECLARE_MODULE()
with the correct args, where name is the name of the module and evh
(with its argument arg) is the event handler for the module (refer to DE
CLARE_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().

#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);