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/*
* Copyright: (C) 2002 by Florian Lohoff <flo@rfc822.org>
* (C) 2004 by Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, Version 2, as published by the
* Free Software Foundation.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "dvh.h"
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
#if 1
#define SECTORS_PER_TRACK 32
#define BYTES_PER_SECTOR 512
#else
#define SECTORS_PER_TRACK 8
#define BYTES_PER_SECTOR 2048
#endif
#define swab16(x) \
({ \
uint16_t __x = (x); \
((uint16_t)( \
(((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
(((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
})
#define swab32(x) \
({ \
uint32_t __x = (x); \
((uint32_t)( \
(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
})
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define be32_to_cpu(x) swab32((x))
#define be16_to_cpu(x) swab16((x))
#define cpu_to_be32(x) swab32((x))
#define cpu_to_be16(x) swab16((x))
#else
#define be32_to_cpu(x) ((uint32_t)(x))
#define be16_to_cpu(x) ((uint16_t)(x))
#define cpu_to_be32(x) ((uint32_t)(x))
#define cpu_to_be16(x) ((uint16_t)(x))
#endif
static void vh_calc_checksum(struct volume_header *vh)
{
uint32_t newsum = 0;
uint32_t *buffer = (uint32_t *)vh;
unsigned int i;
vh->vh_csum = 0;
for(i = 0; i < sizeof(struct volume_header)/sizeof(uint32_t); i++)
newsum -= be32_to_cpu(buffer[i]);
vh->vh_csum = cpu_to_be32(newsum);
}
static void swap_dp_out(struct device_parameters *dp)
{
cpu_to_be16(dp->dp_cyls);
cpu_to_be16(dp->dp_shd0);
cpu_to_be16(dp->dp_trks0);
cpu_to_be16(dp->dp_unused);
cpu_to_be16(dp->dp_secs);
cpu_to_be16(dp->dp_secbytes);
cpu_to_be16(dp->dp_interleave);
cpu_to_be32(dp->dp_flags);
cpu_to_be32(dp->dp_datarate);
cpu_to_be32(dp->dp_nretries);
cpu_to_be32(dp->dp_mspw);
cpu_to_be32(dp->dp_xgap1);
cpu_to_be32(dp->dp_xsync);
cpu_to_be32(dp->dp_xrdly);
cpu_to_be32(dp->dp_xgap2);
cpu_to_be32(dp->dp_xrgate);
cpu_to_be32(dp->dp_xwcont);
}
static void swap_vd_out(struct volume_directory *vd)
{
cpu_to_be32(vd->vd_lbn);
cpu_to_be32(vd->vd_nbytes);
}
static void swap_pt_out(struct partition_table *pt)
{
cpu_to_be32(pt->pt_nblks);
cpu_to_be32(pt->pt_firstlbn);
cpu_to_be32(pt->pt_type);
}
static void swap_vh_out(struct volume_header *vh)
{
cpu_to_be32(vh->vh_magic);
cpu_to_be16(vh->vh_rootpt);
cpu_to_be16(vh->vh_swappt);
swap_dp_out(&vh->vh_dp);
swap_vd_out(vh->vh_vd);
swap_pt_out(vh->vh_pt);
cpu_to_be32(vh->vh_csum);
cpu_to_be32(vh->vh_fill);
}
static void usage(void)
{
printf("Usage:\ngenisovh <isofile> [<name:sblock,size> ...]\n");
exit(1);
}
int main(int argc, char **argv)
{
int fd;
int i;
int v;
int block;
int size;
char *isoname;
char *pos;
struct stat st;
struct volume_header vh;
if (argc < 2)
usage();
isoname = argv[1];
if (!(fd = open(isoname, O_RDWR))) {
printf("File not found %s\n", isoname);
return 1;
}
if (fstat(fd, &st)) {
printf("Failed to stat file %s\n", isoname);
close(fd);
return 1;
}
memset(&vh, 0, sizeof(vh));
vh.vh_magic = VHMAGIC;
/* Values from an IRIX cd */
vh.vh_dp.dp_secbytes = BYTES_PER_SECTOR;
vh.vh_dp.dp_secs = SECTORS_PER_TRACK;
vh.vh_dp.dp_flags = DP_RESEEK|DP_IGNOREERRORS|DP_TRKFWD;
vh.vh_dp.dp_trks0 = 1;
vh.vh_dp.dp_cyls = (st.st_size + BYTES_PER_SECTOR - 1)
/ (SECTORS_PER_TRACK * BYTES_PER_SECTOR);
for(i = 2, v = 0; i < argc; i++, v++) {
char *cline = argv[i];
/* ip22:3838383,3333 */
if (!(pos = strchr(cline, ':'))) {
printf("Couldn't find : in parameter %s\n", cline);
usage();
}
/* copy name */
strncpy(vh.vh_vd[v].vd_name, cline, MIN(VDNAMESIZE, pos - cline));
cline = pos + 1;
if (!(pos = strchr(cline, ','))) {
printf("Couldn't find , in parameter %s\n", cline);
usage();
}
block = atoi(cline);
vh.vh_vd[v].vd_lbn = block;
cline = pos + 1;
size = atoi(cline);
vh.vh_vd[v].vd_nbytes = size;
}
/* Create volume partition on whole cd iso */
vh.vh_pt[10].pt_nblks = (st.st_size + (BYTES_PER_SECTOR - 1))
/ BYTES_PER_SECTOR;
vh.vh_pt[10].pt_firstlbn = 0;
vh.vh_pt[10].pt_type = PTYPE_VOLUME;
/* Create volume header partition, also on WHOLE cd iso */
vh.vh_pt[8].pt_nblks = (st.st_size + (BYTES_PER_SECTOR - 1))
/ BYTES_PER_SECTOR;
vh.vh_pt[8].pt_firstlbn = 0;
vh.vh_pt[8].pt_type = PTYPE_VOLHDR;
swap_vh_out(&vh);
/* Create checksum */
vh_calc_checksum(&vh);
if (write(fd, &vh, sizeof(vh)) != sizeof(vh)) {
printf("Failed to write volume header to iso image");
close(fd);
return 1;
}
close(fd);
return 0;
}
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