modstat man page on FreeBSD

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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 kernel, 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
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