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dev_module(9) [debian man page]

DEV_MODULE(9)						   BSD Kernel Developer's Manual					     DEV_MODULE(9)

NAME

     DEV_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
     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
     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 ALSO

     DECLARE_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

Check Out this Related Man Page

SYSCALL_MODULE(9)					   BSD Kernel Developer's Manual					 SYSCALL_MODULE(9)

NAME

     SYSCALL_MODULE -- syscall kernel module declaration macro

SYNOPSIS

     #include <sys/param.h>
     #include <sys/kernel.h>
     #include <sys/proc.h>
     #include <sys/module.h>
     #include <sys/sysent.h>

     SYSCALL_MODULE(name, int *offset, struct sysent *new_sysent, modeventhand_t evh, void *arg);

DESCRIPTION

     The SYSCALL_MODULE() macro declares a new syscall.  SYSCALL_MODULE() expands into a kernel module declaration named as name.

     The rest of the arguments expected by this macro are:

     offset	 A pointer to an int which saves the offset in struct sysent where the syscall is allocated.

     new_sysent  is a pointer to a structure that specifies the function implementing the syscall and the number of arguments this function needs
		 (see <sys/sysent.h>).

     evh	 A pointer to the kernel module event handler function with the argument arg.  Please refer to module(9) for more information.

     arg	 The argument passed to the callback functions of the evh event handler when it is called.

EXAMPLES

     A minimal example for a syscall module can be found in /usr/share/examples/kld/syscall/module/syscall.c.

SEE ALSO

     module(9)

     /usr/share/examples/kld/syscall/module/syscall.c

AUTHORS

     This manual page was written by Alexander Langer <alex@FreeBSD.org>.

BSD
								  January 7, 2005							       BSD
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