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(mod

ule_stat) */
char name[MAXPATHLEN];
int refs;
int id;
modspecific_t data;

};
typedef union modspecific {

int intval;
u_int u_intval;
long longval;
u_long u_longval;

} 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) func

tion.

SEE ALSO

kldfind(2), kldfirstmod(2), kldload(2), kldnext(2), kld

stat(2),
kldsym(2), kldunload(2), modfind(2), modfnext(2), mod

next(2), kld(4),
kldstat(8)

HISTORY

The kld interface first appeared in FreeBSD 3.0.

BSD September 28, 2000

BSD