The HDIO_GETGEO ioctl allows to get the start of a partition, and the
BLKGETSIZE gets the size.
They are used in the following program. Usage:
blockinfo /dev/hda2 /dev/hda4 /dev/hda8 ...
Btw, this should also work on partitions which are not currently mounted.
Regards,
Alain
#include <sys/types.h>
#include <fcntl.h>
#include <stdio.h>
#include <linux/fs.h>
#include <linux/hdreg.h>
#include <unistd.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
struct hd_geometry loc;
int fd, size, i;
for(i=1; i < argc; i++) {
fd = open(argv[i], O_RDONLY);
if(fd < 0) {
perror("open");
exit(1);
}
if(ioctl(fd, HDIO_GETGEO, &loc) < 0) {
perror("ioctl start");
exit(1);
}
if(ioctl(fd, BLKGETSIZE, &size) < 0) {
perror("ioctl start");
exit(1);
}
printf("%s: h=%3d s=%3d c=%4d start=%8d size=%8d end=%8d\n",
argv[i],
loc.heads, (int)loc.sectors, loc.cylinders,
(int)loc.start, size, (int) loc.start + size -1);
close(fd);
}
exit(0);
}