From 3e39ff63658ed76398d0ee98f361221744fe591f Mon Sep 17 00:00:00 2001 From: Karel Zak Date: Thu, 13 Nov 2008 17:32:14 +0100 Subject: [PATCH] volume_id: fat - move check for msdos signature (0x55 0xaa) Make the msdos signature (0x55 0xaa) at 510 and 511 optional when the standard FAT magic string is present. --- extras/volume_id/lib/fat.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/extras/volume_id/lib/fat.c b/extras/volume_id/lib/fat.c index 95735c2d..e30318cf 100644 --- a/extras/volume_id/lib/fat.c +++ b/extras/volume_id/lib/fat.c @@ -281,10 +281,6 @@ int volume_id_probe_vfat(struct volume_id *id, uint64_t off, uint64_t size) if (buf == NULL) return -1; - /* check signature */ - if (buf[510] != 0x55 || buf[511] != 0xaa) - return -1; - vs = (struct vfat_super_block *) buf; if (memcmp(vs->sysid, "NTFS", 4) == 0) return -1; @@ -305,6 +301,10 @@ int volume_id_probe_vfat(struct volume_id *id, uint64_t off, uint64_t size) if (memcmp(vs->type.fat.magic, "FAT12 ", 8) == 0) goto magic; + /* check signature */ + if (buf[510] != 0x55 || buf[511] != 0xaa) + return -1; + /* some old floppies don't have a magic, expect the boot jump address to match */ if ((vs->boot_jump[0] != 0xeb || vs->boot_jump[2] != 0x90) && vs->boot_jump[0] != 0xe9) -- 2.39.5