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/* very primitive wrapper around the `add partition' ioctl */
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#ifdef HAVE_LINUX_COMPILER_H
#include <linux/compiler.h>
#endif
#include <linux/blkpg.h>
int
main(int argc, char **argv){
int fd;
struct blkpg_ioctl_arg a;
struct blkpg_partition p;
if (argc != 5) {
fprintf(stderr,
"usage: %s diskdevice partitionnr start length\n",
argv[0]);
exit(1);
}
if ((fd = open(argv[1], O_RDONLY)) < 0) {
perror(argv[1]);
exit(1);
}
p.pno = atoi(argv[2]);
p.start = 512 * ((long long) atol(argv[3]));
p.length = 512 * ((long long) atol(argv[4]));
p.devname[0] = 0;
p.volname[0] = 0;
a.op = BLKPG_ADD_PARTITION;
a.flags = 0;
a.datalen = sizeof(p);
a.data = &p;
if (ioctl(fd, BLKPG, &a) == -1) {
perror("BLKPG");
exit(1);
}
return 0;
}
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