66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/* $NetBSD: iso9660.c,v 1.2 2005/09/14 09:41:24 drochner Exp $ */
|
|
|
|
#include <sys/types.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <err.h>
|
|
#include <isofs/cd9660/iso.h>
|
|
|
|
#include "mscdlabel.h"
|
|
|
|
#define BLKSIZ ISO_DEFAULT_BLOCK_SIZE
|
|
|
|
static void
|
|
printinfo(struct iso_primary_descriptor *vd)
|
|
{
|
|
char label[32 + 1], date[] = "yyyy/mm/dd hh:mm", *d;
|
|
|
|
strlcpy(label, vd->volume_id, sizeof(label));
|
|
/* strip trailing blanks */
|
|
d = label + strlen(label);
|
|
while (d > label && *(d - 1) == ' ')
|
|
d--;
|
|
*d = '\0';
|
|
|
|
d = vd->creation_date;
|
|
memcpy(date, d, 4); /* year */
|
|
memcpy(date + 5, d + 4, 2); /* month */
|
|
memcpy(date + 8, d + 6, 2); /* day */
|
|
memcpy(date + 11, d + 8, 2); /* hour */
|
|
memcpy(date + 14, d + 10, 2); /* min */
|
|
printf("ISO filesystem, label \"%s\", creation time: %s\n",
|
|
label, date);
|
|
}
|
|
|
|
int
|
|
check_primary_vd(int fd, int start, int len)
|
|
{
|
|
int i, res, isiso;
|
|
struct iso_primary_descriptor *vd;
|
|
|
|
isiso = 0;
|
|
vd = malloc(BLKSIZ);
|
|
|
|
for (i = 16; (i < 100) && (i < len); i++) {
|
|
res = pread(fd, vd, BLKSIZ, (start + i) * BLKSIZ);
|
|
if (res < 0) {
|
|
warn("read CD sector %d", start + i);
|
|
break;
|
|
}
|
|
|
|
if (memcmp(vd->id, ISO_STANDARD_ID, sizeof(vd->id)))
|
|
continue;
|
|
if (isonum_711(vd->type) == ISO_VD_PRIMARY) {
|
|
printinfo(vd);
|
|
isiso = 1;
|
|
break;
|
|
} else if (isonum_711(vd->type) == ISO_VD_END)
|
|
break;
|
|
}
|
|
|
|
free(vd);
|
|
return (isiso);
|
|
}
|