Grab a snapshot of Marcel's gpt tool. This is still a work-in-progress

but is useful to have handy.  EFI GPT partitions are used instead of the
fdisk+disklabel combination.  They are pure 64 bit LBA, are fully
extensible, support up to 16383 partitons per disk, etc.

1 files changed, 114 insertions, 0 deletions

diff --git a/sbin/gpt/destroy.c b/sbin/gpt/destroy.c
new file mode 100644
index 0000000..101f975
--- /dev/null
+++ b/sbin/gpt/destroy.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2002 Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <sys/uuid.h>
+#include <sys/gpt.h>
+
+#include <err.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "map.h"
+#include "gpt.h"
+
+int recoverable;
+
+static void
+usage_destroy(void)
+{
+
+	fprintf(stderr,
+	    "usage: %s [-r] device ...\n", getprogname());
+	exit(1);
+}
+
+static void
+destroy(int fd)
+{
+	map_t *pri_hdr, *sec_hdr;
+
+	pri_hdr = map_find(MAP_TYPE_PRI_GPT_HDR);
+	sec_hdr = map_find(MAP_TYPE_SEC_GPT_HDR);
+
+	if (pri_hdr == NULL && sec_hdr == NULL) {
+		warnx("%s: error: device doesn't contain a GPT", device_name);
+		return;
+	}
+
+	if (recoverable && sec_hdr == NULL) {
+		warnx("%s: error: recoverability not possible", device_name);
+		return;
+	}
+
+	if (pri_hdr != NULL) {
+		bzero(pri_hdr->map_data, secsz);
+		gpt_write(fd, pri_hdr);
+	}
+
+	if (!recoverable && sec_hdr != NULL) {
+		bzero(sec_hdr->map_data, secsz);
+		gpt_write(fd, sec_hdr);
+	}
+}
+
+int
+cmd_destroy(int argc, char *argv[])
+{
+	int ch, fd;
+
+	while ((ch = getopt(argc, argv, "r")) != -1) {
+		switch(ch) {
+		case 'r':
+			recoverable = 1;
+			break;
+		default:
+			usage_destroy();
+		}
+	}
+
+	if (argc == optind)
+		usage_destroy();
+
+	while (optind < argc) {
+		fd = gpt_open(argv[optind++]);
+		if (fd == -1) {
+			warn("unable to open device '%s'", device_name);
+			continue;
+		}
+
+		destroy(fd);
+
+		gpt_close(fd);
+	}
+
+	return (0);
+}