134 lines
3.5 KiB
Groff
134 lines
3.5 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 March 28, 2012
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.Dt KLDSTAT 2
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.Os
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.Sh NAME
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.Nm kldstat
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.Nd get status of kld file
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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/linker.h
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.Ft int
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.Fn kldstat "int fileid" "struct kld_file_stat *stat"
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.Sh DESCRIPTION
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The
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.Fn kldstat
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system call writes the info for the file referred to by
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.Fa fileid
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into
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.Fa stat .
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.Bd -literal
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struct kld_file_stat {
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int version; /* set to sizeof(struct kld_file_stat) */
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char name[MAXPATHLEN];
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int refs;
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int id;
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caddr_t address;
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size_t size;
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char pathname[MAXPATHLEN];
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};
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.Ed
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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 kldstat ,
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and not
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.Fn kldstat
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itself.
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.It name
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The name of the file referred to by
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.Fa fileid .
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.It refs
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The number of modules referenced by
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.Fa fileid .
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.It id
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The id of the file specified in
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.Fa fileid .
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.It address
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The load address of the kld file.
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.It size
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The amount of memory in bytes allocated by the file.
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.It pathname
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The full name of the file referred to by
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.Fa fileid ,
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including the path.
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.El
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.Sh RETURN VALUES
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.Rv -std kldstat
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.Sh ERRORS
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The information for the file referred to by
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.Fa fileid
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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 file 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 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 modstat 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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.Sh BUGS
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The pathname may not be accurate if the file system mounts have
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changed since the module was loaded, or if this function is called
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within a chrooted environment.
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