Adding upstream version 2.38.1.upstream/2.38.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 102 insertions, 0 deletions

diff --git a/libblkid/src/partitions/minix.c b/libblkid/src/partitions/minix.c
new file mode 100644
index 0000000..43c9d9a
--- /dev/null
+++ b/libblkid/src/partitions/minix.c
@@ -0,0 +1,102 @@
+/*
+ * Minix partition parsing code
+ *
+ * Copyright (C) 2009 Karel Zak <kzak@redhat.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "partitions.h"
+#include "minix.h"
+
+static int probe_minix_pt(blkid_probe pr,
+		const struct blkid_idmag *mag __attribute__((__unused__)))
+{
+	struct dos_partition *p;
+	blkid_parttable tab = NULL;
+	blkid_partition parent;
+	blkid_partlist ls;
+	unsigned char *data;
+	int i;
+
+	data = blkid_probe_get_sector(pr, 0);
+	if (!data) {
+		if (errno)
+			return -errno;
+		goto nothing;
+	}
+
+	ls = blkid_probe_get_partlist(pr);
+	if (!ls)
+		goto nothing;
+
+	/* Parent is required, because Minix uses the same PT as DOS and
+	 * difference is only in primary partition (parent) type.
+	 */
+	parent = blkid_partlist_get_parent(ls);
+	if (!parent)
+		goto nothing;
+
+	if (blkid_partition_get_type(parent) != MBR_MINIX_PARTITION)
+		goto nothing;
+
+	if (blkid_partitions_need_typeonly(pr))
+		/* caller does not ask for details about partitions */
+		return BLKID_PROBE_OK;
+
+	tab = blkid_partlist_new_parttable(ls, "minix", MBR_PT_OFFSET);
+	if (!tab)
+		goto err;
+
+	for (i = 0, p = mbr_get_partition(data, 0);
+			i < MINIX_MAXPARTITIONS; i++, p++) {
+
+		uint32_t start, size;
+		blkid_partition par;
+
+		if (p->sys_ind != MBR_MINIX_PARTITION)
+			continue;
+
+		start = dos_partition_get_start(p);
+		size = dos_partition_get_size(p);
+
+		if (parent && !blkid_is_nested_dimension(parent, start, size)) {
+			DBG(LOWPROBE, ul_debug(
+				"WARNING: minix partition (%d) overflow "
+				"detected, ignore", i));
+			continue;
+		}
+
+		par = blkid_partlist_add_partition(ls, tab, start, size);
+		if (!par)
+			goto err;
+
+		blkid_partition_set_type(par, p->sys_ind);
+		blkid_partition_set_flags(par, p->boot_ind);
+	}
+
+	return BLKID_PROBE_OK;
+
+nothing:
+	return BLKID_PROBE_NONE;
+err:
+	return -ENOMEM;
+}
+
+/* same as DOS */
+const struct blkid_idinfo minix_pt_idinfo =
+{
+	.name		= "minix",
+	.probefunc	= probe_minix_pt,
+	.magics		=
+	{
+		{ .magic = "\x55\xAA", .len = 2, .sboff = 510 },
+		{ NULL }
+	}
+};
+