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/*
* Copyright 2009 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Peter Jones <pjones@redhat.com>
*/
#ifndef DUMPET_H
#define DUMPET_H
#include <errno.h>
#include "iso9660.h"
#include "eltorito.h"
static inline off_t get_sector_offset(int sector_number)
{
Sector sector;
return sector_number * sizeof(sector);
}
static inline int read_sector(FILE *iso, int sector_number, Sector *sector)
{
size_t n;
fseek(iso, get_sector_offset(sector_number), SEEK_SET);
n = fread(sector, sizeof(*sector), 1, iso);
if (n != 1) {
int errnum = errno;
fprintf(stderr, "dumpet: Error reading image: %m\n");
errno = errnum;
return -errno;
}
return 0;
}
static inline int write_sector(FILE *iso, int sector_number, Sector *sector)
{
size_t n;
fseek(iso, get_sector_offset(sector_number), SEEK_SET);
n = fwrite(sector, sizeof(*sector), 1, iso);
if (n != 1) {
int errnum = errno;
fprintf(stderr, "dumpet: Error writing image: %m\n");
errno = errnum;
return -errno;
}
return 0;
}
#endif /* DUMPET_H */
/* vim:set shiftwidth=8 softtabstop=8: */
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