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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <stdio.h>
#include <libintl.h>
#include <errno.h>
#include <assert.h>
#include <unistd.h>
#include "bblk_einfo.h"
#include "boot_utils.h"
boolean_t boot_debug = B_FALSE;
boolean_t nowrite = B_FALSE;
void
boot_gdebug(const char *funcname, char *format, ...)
{
va_list ap;
if (boot_debug == B_FALSE)
return;
(void) fprintf(stdout, "%s(): ", funcname);
va_start(ap, format);
/* LINTED: E_SEC_PRINTF_VAR_FMT */
(void) vfprintf(stdout, format, ap);
va_end(ap);
}
/*
* Common functions to write out and read in block-sized data to a file
* descriptor.
*/
int
write_out(int fd, void *buffer, size_t size, off_t off)
{
int ret;
char *buf = buffer;
if (size % SECTOR_SIZE != 0)
BOOT_DEBUG("Expected block-sized data, got: %d\n", size);
/* Dry run. */
if (nowrite)
return (BC_SUCCESS);
for (;;) {
again:
ret = pwrite(fd, buf, size, off);
if (ret == -1) {
if (errno == EAGAIN)
goto again;
else
return (BC_ERROR);
}
if (ret < size) {
size -= ret;
off += ret;
buf += ret;
} else {
break;
}
}
return (BC_SUCCESS);
}
int
read_in(int fd, void *buffer, size_t size, off_t off)
{
int ret;
char *buf = buffer;
if (size % SECTOR_SIZE != 0)
BOOT_DEBUG("Expected block-sized data, got: %d\n", size);
for (;;) {
again:
ret = pread(fd, buf, size, off);
if (ret == -1) {
if (errno == EAGAIN)
goto again;
else
return (BC_ERROR);
}
if (ret < size) {
size -= ret;
off += ret;
buf += ret;
} else {
break;
}
}
return (BC_SUCCESS);
}
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