MODSTAT(2)						      BSD System Calls Manual							MODSTAT(2)

NAME

     modstat -- get status of kernel module

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <sys/param.h>
     #include <sys/module.h>

     int
     modstat(int modid, struct module_stat *stat);

DESCRIPTION

     The modstat() system call writes the info for the kernel module referred to by modid into stat.

     struct module_stat {
	     int	 version;	 /* set to sizeof(module_stat) */
	     char	 name[MAXMODNAME];
	     int	 refs;
	     int	 id;
	     modspecific_t data;
     };
     typedef union modspecific {
	     int	 intval;
	     u_int	 uintval;
	     long	 longval;
	     u_long	 ulongval;
     } modspecific_t;

     version	 This field is set to the size of the structure mentioned above by the code calling modstat(), and not modstat() itself.

     name	 The name of the module referred to by modid.

     refs	 The number of modules referenced by modid.

     id 	 The id of the module specified in modid.

     data	 Module specific data.

RETURN VALUES

     The modstat() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate
     the error.

ERRORS

     The information for the module referred to by modid is filled into the structure pointed to by stat unless:

     [ENOENT]		The module was not found (probably not loaded).

     [EINVAL]		The version specified in the version field of stat is not the proper version.  You would need to rebuild world, the ker-
			nel, or your application, if this error occurs, given that you did properly fill in the version field.

     [EFAULT]		There was a problem copying one, some, or all of the fields into stat in the copyout(9) function.

SEE ALSO

     kldfind(2), kldfirstmod(2), kldload(2), kldnext(2), kldstat(2), kldsym(2), kldunload(2), modfind(2), modfnext(2), modnext(2), kld(4),
     kldstat(8)

HISTORY

     The kld interface first appeared in FreeBSD 3.0.

BSD
								   July 15, 2008							       BSD