129 lines
3.2 KiB
Groff
129 lines
3.2 KiB
Groff
.\"
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.\" Copyright (c) 1999 Chris Costello
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd July 15, 2008
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.Dt MODSTAT 2
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.Os
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.Sh NAME
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.Nm modstat
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.Nd get status of kernel module
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/param.h
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.In sys/module.h
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.Ft int
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.Fn modstat "int modid" "struct module_stat *stat"
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.Sh DESCRIPTION
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The
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.Fn modstat
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system call writes the info for the kernel module referred to by
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.Fa modid
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into
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.Fa stat .
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.Bd -literal
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struct module_stat {
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int version; /* set to sizeof(module_stat) */
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char name[MAXMODNAME];
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int refs;
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int id;
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modspecific_t data;
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};
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typedef union modspecific {
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int intval;
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u_int uintval;
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long longval;
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u_long ulongval;
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} modspecific_t;
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.Ed
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.Pp
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.Bl -tag -width XXXaddress
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.It version
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This field is set to the size of the structure mentioned above by the code
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calling
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.Fn modstat ,
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and not
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.Fn modstat
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itself.
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.It name
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The name of the module referred to by
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.Fa modid .
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.It refs
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The number of modules referenced by
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.Fa modid .
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.It id
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The id of the module specified in
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.Fa modid .
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.It data
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Module specific data.
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.El
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.Sh RETURN VALUES
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.Rv -std modstat
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.Sh ERRORS
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The information for the module referred to by
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.Fa modid
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is filled into the structure pointed to by
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.Fa stat
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unless:
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.Bl -tag -width Er
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.It Bq Er ENOENT
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The module was not found (probably not loaded).
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.It Bq Er EINVAL
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The version specified in the
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.Fa version
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field of stat is not the proper version.
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You would need to rebuild world, the
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kernel, or your application, if this error occurs, given that you did properly
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fill in the
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.Fa version
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field.
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.It Bq Er EFAULT
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There was a problem copying one, some, or all of the fields into
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.Fa stat
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in the
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.Xr copyout 9
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function.
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.El
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.Sh SEE ALSO
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.Xr kldfind 2 ,
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.Xr kldfirstmod 2 ,
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.Xr kldload 2 ,
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.Xr kldnext 2 ,
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.Xr kldstat 2 ,
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.Xr kldsym 2 ,
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.Xr kldunload 2 ,
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.Xr modfind 2 ,
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.Xr modfnext 2 ,
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.Xr modnext 2 ,
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.Xr kld 4 ,
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.Xr kldstat 8
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.Sh HISTORY
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The
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.Nm kld
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interface first appeared in
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.Fx 3.0 .
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