prom_vername.c revision fa9e4066f08beec538e775443c5be79dd423fcab
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/promif.h>
#include <sys/promimpl.h>
/*
* Return a character string in buf,buflen representing the running
* version of the firmware. Systems that have no concept of such a
* string may return the string "unknown".
*
* Return the actual length of the string, including the NULL terminator.
* Copy at most buflen bytes into the caller's buffer, always providing
* NULL termination.
*
* Returns the actual length of the string, plus copies data in the callers
* buf copying at most buflen bytes. Returns -1 if an internal error occurs.
*/
int
prom_version_name(char *buf, int buflen)
{
pnode_t nodeid;
int proplen;
char *unknown = "unknown";
*buf = *(buf + buflen - 1) = (char)0; /* Force NULL termination */
/*
* On sun4u systems, the /openprom "version" property
* contains the running version of the prom. Some older
* pre-FCS proms may not have the "version" property, so
* in that case we just return "unknown".
*/
nodeid = prom_finddevice("/openprom");
if (nodeid == (pnode_t)-1)
return (-1);
proplen = prom_bounded_getprop(nodeid, "version", buf, buflen - 1);
if (proplen <= 0) {
(void) prom_strncpy(buf, unknown, buflen - 1);
return (prom_strlen(unknown) + 1);
}
return (proplen);
}