1 files changed, 133 insertions, 0 deletions
diff --git a/extras/volume_id/lib/sysv.c b/extras/volume_id/lib/sysv.c
new file mode 100644
index 0000000000..52349c0623
--- /dev/null
+++ b/extras/volume_id/lib/sysv.c
@@ -0,0 +1,133 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	This program is free software; you can redistribute it and/or modify it
+ *	under the terms of the GNU General Public License as published by the
+ *	Free Software Foundation version 2 of the License.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "libvolume_id.h"
+#include "util.h"
+
+#define SYSV_NICINOD			100
+#define SYSV_NICFREE			50
+
+struct sysv_super
+{
+	uint16_t	s_isize;
+	uint16_t	s_pad0;
+	uint32_t	s_fsize;
+	uint16_t	s_nfree;
+	uint16_t	s_pad1;
+	uint32_t	s_free[SYSV_NICFREE];
+	uint16_t	s_ninode;
+	uint16_t	s_pad2;
+	uint16_t	s_inode[SYSV_NICINOD];
+	uint8_t		s_flock;
+	uint8_t		s_ilock;
+	uint8_t		s_fmod;
+	uint8_t		s_ronly;
+	uint32_t	s_time;
+	uint16_t	s_dinfo[4];
+	uint32_t	s_tfree;
+	uint16_t	s_tinode;
+	uint16_t	s_pad3;
+	uint8_t		s_fname[6];
+	uint8_t		s_fpack[6];
+	uint32_t	s_fill[12];
+	uint32_t	s_state;
+	uint32_t	s_magic;
+	uint32_t	s_type;
+} PACKED;
+
+#define XENIX_NICINOD				100
+#define XENIX_NICFREE				100
+
+struct xenix_super {
+	uint16_t	s_isize;
+	uint32_t	s_fsize;
+	uint16_t	s_nfree;
+	uint32_t	s_free[XENIX_NICFREE];
+	uint16_t	s_ninode;
+	uint16_t	s_inode[XENIX_NICINOD];
+	uint8_t		s_flock;
+	uint8_t		s_ilock;
+	uint8_t		s_fmod;
+	uint8_t		s_ronly;
+	uint32_t	s_time;
+	uint32_t	s_tfree;
+	uint16_t	s_tinode;
+	uint16_t	s_dinfo[4];
+	uint8_t		s_fname[6];
+	uint8_t		s_fpack[6];
+	uint8_t		s_clean;
+	uint8_t		s_fill[371];
+	uint32_t	s_magic;
+	uint32_t	s_type;
+} PACKED;
+
+#define SYSV_SUPERBLOCK_BLOCK			0x01
+#define SYSV_MAGIC				0xfd187e20
+#define XENIX_SUPERBLOCK_BLOCK			0x18
+#define XENIX_MAGIC				0x2b5544
+#define SYSV_MAX_BLOCKSIZE			0x800
+
+int volume_id_probe_sysv(struct volume_id *id, uint64_t off)
+{
+	struct sysv_super *vs;
+	struct xenix_super *xs;
+	unsigned int boff;
+
+	dbg("probing at offset 0x%llx", (unsigned long long) off);
+
+	for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) {
+		vs = (struct sysv_super *)
+			volume_id_get_buffer(id, off + (boff * SYSV_SUPERBLOCK_BLOCK), 0x200);
+		if (vs == NULL)
+			return -1;
+
+		if (vs->s_magic == cpu_to_le32(SYSV_MAGIC) || vs->s_magic == cpu_to_be32(SYSV_MAGIC)) {
+			volume_id_set_label_raw(id, vs->s_fname, 6);
+			volume_id_set_label_string(id, vs->s_fname, 6);
+			id->type = "sysv";
+			goto found;
+		}
+	}
+
+	for (boff = 0x200; boff <= SYSV_MAX_BLOCKSIZE; boff <<= 1) {
+		xs = (struct xenix_super *)
+			volume_id_get_buffer(id, off + (boff + XENIX_SUPERBLOCK_BLOCK), 0x200);
+		if (xs == NULL)
+			return -1;
+
+		if (xs->s_magic == cpu_to_le32(XENIX_MAGIC) || xs->s_magic == cpu_to_be32(XENIX_MAGIC)) {
+			volume_id_set_label_raw(id, xs->s_fname, 6);
+			volume_id_set_label_string(id, xs->s_fname, 6);
+			id->type = "xenix";
+			goto found;
+		}
+	}
+
+	return -1;
+
+found:
+	volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
+	return 0;
+}