1 files changed, 40 insertions, 0 deletions
diff --git a/fdisk/addpart.c b/fdisk/addpart.c
new file mode 100644
index 000000000..11d4305b9
--- /dev/null
+++ b/fdisk/addpart.c
@@ -0,0 +1,40 @@
+/* very primitive wrapper around the `add partition' ioctl */
+#include <stdio.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#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;
+}