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/*
* 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 <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <alloca.h>
#include <sys/stat.h>
#include <malloc.h>
#include <fcntl.h>
#include <syslog.h>
#include <mdesc.h>
#include <string.h>
#include <errno.h>
#define MDESC_PATH "/devices/pseudo/mdesc@0:mdesc"
#define SIZE 8192
md_t *
mdesc_devinit(void)
{
int fh;
uint8_t *bufp = NULL;
int res;
int size;
int offset;
md_t *mdp;
fh = open(MDESC_PATH, O_RDONLY, 0);
if (fh < 0) {
return (NULL);
}
size = SIZE; /* initial size */
offset = 0;
bufp = malloc(size);
if (NULL == bufp) {
return (NULL);
}
/* OK read until we get a EOF */
do {
int len;
len = size - offset;
while (len < SIZE) {
size += SIZE;
bufp = realloc(bufp, size);
if (NULL == bufp)
return (NULL);
len = size - offset;
}
do {
res = read(fh, bufp+offset, len);
} while ((res < 0) && (errno == EAGAIN));
if (res < 0) {
free(bufp);
return (NULL);
}
offset += res;
} while (res > 0);
(void) close(fh);
bufp = realloc(bufp, offset);
if (NULL == bufp)
return (NULL);
mdp = md_init_intern((uint64_t *)bufp, malloc, free);
if (NULL == mdp) {
free(bufp);
return (NULL);
}
return (mdp);
}
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