libblkid: add ultrix PT support

Signed-off-by: Karel Zak <kzak@redhat.com>

4 files changed, 91 insertions, 0 deletions

diff --git a/shlibs/blkid/src/partitions/Makefile.am b/shlibs/blkid/src/partitions/Makefile.am
index 6af2022ea..f617389d8 100644
--- a/shlibs/blkid/src/partitions/Makefile.am
+++ b/shlibs/blkid/src/partitions/Makefile.am
@@ -18,4 +18,5 @@ libblkid_partitions_la_SOURCES = partitions.c \
 				dos.c \
 				dos.h \
 				minix.c \
+				ultrix.c \
 				gpt.c
diff --git a/shlibs/blkid/src/partitions/partitions.c b/shlibs/blkid/src/partitions/partitions.c
index 219a19732..ad0c2f8cf 100644
--- a/shlibs/blkid/src/partitions/partitions.c
+++ b/shlibs/blkid/src/partitions/partitions.c
@@ -114,6 +114,7 @@ static const struct blkid_idinfo *idinfos[] =
 	&dos_pt_idinfo,
 	&gpt_pt_idinfo,
 	&mac_pt_idinfo,
+	&ultrix_pt_idinfo,
 	&bsd_pt_idinfo,
 	&unixware_pt_idinfo,
 	&solaris_x86_pt_idinfo,
diff --git a/shlibs/blkid/src/partitions/partitions.h b/shlibs/blkid/src/partitions/partitions.h
index 2a4d20af5..c4ccd3b65 100644
--- a/shlibs/blkid/src/partitions/partitions.h
+++ b/shlibs/blkid/src/partitions/partitions.h
@@ -57,5 +57,6 @@ extern const struct blkid_idinfo mac_pt_idinfo;
 extern const struct blkid_idinfo dos_pt_idinfo;
 extern const struct blkid_idinfo minix_pt_idinfo;
 extern const struct blkid_idinfo gpt_pt_idinfo;
+extern const struct blkid_idinfo ultrix_pt_idinfo;
 
 #endif /* BLKID_PARTITIONS_H */
diff --git a/shlibs/blkid/src/partitions/ultrix.c b/shlibs/blkid/src/partitions/ultrix.c
new file mode 100644
index 000000000..cc848d0a6
--- /dev/null
+++ b/shlibs/blkid/src/partitions/ultrix.c
@@ -0,0 +1,88 @@
+/*
+ * uktrix partition parsing code
+ *
+ * Copyright (C) 2010 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"
+
+#define ULTRIX_MAXPARTITIONS	8
+#define ULTRIX_MAGIC		0x032957
+
+/* sector with partition table */
+#define ULTRIX_SECTOR		((16384 - sizeof(struct ultrix_disklabel)) >> 9)
+/* position of partition table within ULTRIX_SECTOR */
+#define ULTRIX_OFFSET		(512 - sizeof(struct ultrix_disklabel))
+
+struct ultrix_disklabel {
+	int32_t	pt_magic;	/* magic no. indicating part. info exits */
+	int32_t	pt_valid;	/* set by driver if pt is current */
+	struct  pt_info {
+		int32_t		pi_nblocks; /* no. of sectors */
+		uint32_t	pi_blkoff;  /* block offset for start */
+	} pt_part[ULTRIX_MAXPARTITIONS];
+} __attribute__((packed));
+
+
+static int probe_ultrix_pt(blkid_probe pr, const struct blkid_idmag *mag)
+{
+	unsigned char *data;
+	struct ultrix_disklabel *l;
+	blkid_parttable tab = NULL;
+	blkid_partlist ls;
+	int i;
+
+	data = blkid_probe_get_sector(pr, ULTRIX_SECTOR);
+	if (!data)
+		goto nothing;
+
+	l = (struct ultrix_disklabel *) (data + ULTRIX_OFFSET);
+
+	if (l->pt_magic != ULTRIX_MAGIC || l->pt_valid != 1)
+		goto nothing;
+
+	if (blkid_partitions_need_typeonly(pr))
+		/* caller does not ask for details about partitions */
+		return 0;
+
+	ls = blkid_probe_get_partlist(pr);
+	if (!ls)
+		goto err;
+
+	tab = blkid_partlist_new_parttable(ls, "ultrix", 0);
+	if (!tab)
+		goto err;
+
+	for (i = 0; i < ULTRIX_MAXPARTITIONS; i++) {
+		if (!l->pt_part[i].pi_nblocks)
+			 blkid_partlist_increment_partno(ls);
+		else {
+			if (!blkid_partlist_add_partition(ls, tab,
+						l->pt_part[i].pi_blkoff,
+						l->pt_part[i].pi_nblocks))
+				goto err;
+		}
+	}
+
+	return 0;
+nothing:
+	return 1;
+err:
+	return -1;
+}
+
+const struct blkid_idinfo ultrix_pt_idinfo =
+{
+	.name		= "ultrix",
+	.probefunc	= probe_ultrix_pt,
+	.magics		= BLKID_NONE_MAGIC
+};
+