.\"	$OpenBSD: kvm_nlist.3,v 1.8 2007/05/31 19:19:35 jmc Exp $
.\"	$NetBSD: kvm_nlist.3,v 1.3 1996/03/18 22:33:48 thorpej Exp $
.\"
.\" Copyright (c) 1992, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" This code is derived from software developed by the Computer Systems
.\" Engineering group at Lawrence Berkeley Laboratory under DARPA contract
.\" BG 91-66 and contributed to Berkeley.
.\"
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.\" 3. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
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.\"     @(#)kvm_nlist.3	8.1 (Berkeley) 6/4/93
.\"
.Dd $Mdocdate: May 31 2007 $
.Dt KVM_NLIST 3
.Os
.Sh NAME
.Nm kvm_nlist
.Nd retrieve symbol table names from a kernel image
.Sh SYNOPSIS
.Fd #include <kvm.h>
.Fd #include <nlist.h>
.Ft int
.Fn kvm_nlist "kvm_t *kd" "struct nlist *nl"
.Sh DESCRIPTION
.Fn kvm_nlist
retrieves the symbol table entries indicated by the name list argument
.Fa \&nl .
This argument points to an array of nlist structures, terminated by
an entry whose
.Fa n_name
field is
.Dv NULL
(see
.Xr nlist 3 ) .
Each symbol is looked up using the
.Fa n_name
field, and if found, the
corresponding
.Fa n_type
and
.Fa n_value
fields are filled in.
These fields are set
to 0 if the symbol is not found.
.Pp
The program
.Xr kvm_mkdb 8
builds a database from the running kernel's namelist.
If the database matches the opened kernel,
.Fn kvm_nlist
uses it to speed lookups.
.Sh RETURN VALUES
The
.Fn kvm_nlist
function returns the number of invalid entries found.
If the kernel symbol table was unreadable, \-1 is returned.
.Sh FILES
.Bl -tag -width /var/db/kvm_bsd.db -compact
.It Pa /var/db/kvm_bsd.db
.El
.Sh SEE ALSO
.Xr kvm 3 ,
.Xr kvm_close 3 ,
.Xr kvm_getargv 3 ,
.Xr kvm_getenvv 3 ,
.Xr kvm_geterr 3 ,
.Xr kvm_getprocs 3 ,
.Xr kvm_open 3 ,
.Xr kvm_openfiles 3 ,
.Xr kvm_read 3 ,
.Xr kvm_write 3 ,
.Xr kvm_mkdb 8