.\"	$OpenBSD: kvm_nlist.3,v 1.2 1996/05/05 14:57:30 deraadt 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.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\"
.\"     @(#)kvm_nlist.3	8.1 (Berkeley) 6/4/93
.\"
.Dd June 4, 1993
.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 n_name field is
.Dv NULL
(see
.Xr nlist 3 ) .
Each symbol is looked up using the n_name field, and if found, the
corresponding n_type and 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_netbsd.db -compact
.It Pa /var/db/kvm_netbsd.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