rules: Ubuntu merge - use group "cdrom"

[elogind.git] / extras / volume_id / lib / minix.c

diff --git a/extras/volume_id/lib/minix.c b/extras/volume_id/lib/minix.c
index 75e9c3acbd8b1c0dfb5a29ebbb9891489392253a..cca158560279a9c71f8409864fad3b34c085b764 100644 (file)
--- a/extras/volume_id/lib/minix.c
+++ b/extras/volume_id/lib/minix.c
@@ -1,21 +1,26 @@
 /*
  * volume_id - reads filesystem label and uuid
  *
- * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2005-2007 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.
+ * 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, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #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>
@@ -24,7 +29,15 @@
 #include <ctype.h>
 
 #include "libvolume_id.h"
-#include "util.h"
+#include "libvolume_id-private.h"
+
+#define MINIX_SUPERBLOCK_OFFSET                        0x400
+
+#define MINIX_SUPER_MAGIC                      0x137F
+#define MINIX_SUPER_MAGIC2                     0x138F
+#define MINIX2_SUPER_MAGIC                     0x2468
+#define MINIX2_SUPER_MAGIC2                    0x2478
+#define MINIX3_SUPER_MAGIC                     0x4d5a
 
 struct minix_super_block
 {
@@ -40,38 +53,63 @@ struct minix_super_block
        uint32_t        s_zones;
 } PACKED;
 
-#define MINIX_SUPERBLOCK_OFFSET                        0x400
+struct minix3_super_block {
+       uint32_t        s_ninodes;
+       uint16_t        s_pad0;
+       uint16_t        s_imap_blocks;
+       uint16_t        s_zmap_blocks;
+       uint16_t        s_firstdatazone;
+       uint16_t        s_log_zone_size;
+       uint16_t        s_pad1;
+       uint32_t        s_max_size;
+       uint32_t        s_zones;
+       uint16_t        s_magic;
+       uint16_t        s_pad2;
+       uint16_t        s_blocksize;
+       uint8_t         s_disk_version;
+} PACKED;
 
-int volume_id_probe_minix(struct volume_id *id, uint64_t off)
+int volume_id_probe_minix(struct volume_id *id, uint64_t off, uint64_t size)
 {
+       uint8_t *buf;
        struct minix_super_block *ms;
+       struct minix3_super_block *m3s;
 
-       dbg("probing at offset 0x%llx", (unsigned long long) off);
+       info("probing at offset 0x%" PRIx64 "\n", off);
 
-       ms = (struct minix_super_block *) volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
-       if (ms == NULL)
+       buf = volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
+       if (buf == NULL)
                return -1;
 
-       if (le16_to_cpu(ms->s_magic) == 0x137f) {
+       ms = (struct minix_super_block *) buf;
+
+       if (ms->s_magic == MINIX_SUPER_MAGIC ||
+           ms->s_magic == bswap_16(MINIX_SUPER_MAGIC)) {
                strcpy(id->type_version, "1");
                goto found;
        }
-
-       if (le16_to_cpu(ms->s_magic) == 0x1387) {
+       if (ms->s_magic == MINIX_SUPER_MAGIC2 ||
+           ms->s_magic == bswap_16(MINIX_SUPER_MAGIC2)) {
                strcpy(id->type_version, "1");
                goto found;
        }
-
-       if (le16_to_cpu(ms->s_magic) == 0x2468) {
+       if (ms->s_magic == MINIX2_SUPER_MAGIC ||
+           ms->s_magic == bswap_16(MINIX2_SUPER_MAGIC)) {
                strcpy(id->type_version, "2");
                goto found;
        }
-
-       if (le16_to_cpu(ms->s_magic) == 0x2478) {
+       if (ms->s_magic == MINIX2_SUPER_MAGIC2 ||
+           ms->s_magic == bswap_16(MINIX2_SUPER_MAGIC2)) {
                strcpy(id->type_version, "2");
                goto found;
        }
 
+       m3s = (struct minix3_super_block *) buf;
+       if (m3s->s_magic == MINIX3_SUPER_MAGIC ||
+           m3s->s_magic == bswap_16(MINIX3_SUPER_MAGIC)) {
+               strcpy(id->type_version, "3");
+               goto found;
+       }
        goto exit;
 
 found: