Add fstyp(8). This utility, named after its SVR4 counterpart, detects

filesystems.  It differs from file(1) in that it gives machine-parseable
output, it outputs filesystem labels, doesn't get confused by other
formats metadata, and runs in Capsicum sandbox.

Differential Revision:	https://reviews.freebsd.org/D1255
Relnotes:	yes
Sponsored by:	The FreeBSD Foundation

1 files changed, 140 insertions, 0 deletions

diff --git a/usr.sbin/fstyp/msdosfs.h b/usr.sbin/fstyp/msdosfs.h
new file mode 100644
index 0000000..a04b87f
--- /dev/null
+++ b/usr.sbin/fstyp/msdosfs.h
@@ -0,0 +1,140 @@
+/*-
+ * Copyright (c) 2006 Tobias Reifenberger
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+
+/*
+ * Conversion macros for little endian encoded unsigned integers
+ * in byte streams to the local unsigned integer format.
+ */
+#define UINT16BYTES(p) ((uint32_t)((p)[0] + (256*(p)[1])))
+#define UINT32BYTES(p) ((uint32_t)((p)[0] + (256*(p)[1]) +		\
+	    (65536*(p)[2]) + (16777216*(p)[3])))
+
+/*
+ * All following structures are according to:
+ *
+ * Microsoft Extensible Firmware Initiative FAT32 File System Specification
+ * FAT: General Overview of On-Disk Format
+ * Version 1.03, December 6, 2000
+ * Microsoft Corporation
+ */
+
+/*
+ * FAT boot sector and boot parameter block for
+ * FAT12 and FAT16 volumes
+ */
+typedef struct fat_bsbpb {
+	/* common fields */
+	uint8_t BS_jmpBoot[3];
+	uint8_t BS_OEMName[8];
+	uint8_t BPB_BytsPerSec[2];
+	uint8_t BPB_SecPerClus;
+	uint8_t BPB_RsvdSecCnt[2];
+	uint8_t BPB_NumFATs;
+	uint8_t BPB_RootEntCnt[2];
+	uint8_t BPB_TotSec16[2];
+	uint8_t BPB_Media;
+	uint8_t BPB_FATSz16[2];
+	uint8_t BPB_SecPerTrack[2];
+	uint8_t BPB_NumHeads[2];
+	uint8_t BPB_HiddSec[4];
+	uint8_t BPB_TotSec32[4];
+	/* FAT12/FAT16 only fields */
+	uint8_t BS_DrvNum;
+	uint8_t BS_Reserved1;
+	uint8_t BS_BootSig;
+	uint8_t BS_VolID[4];
+	uint8_t BS_VolLab[11];
+	uint8_t BS_FilSysType[8];
+} FAT_BSBPB; /* 62 bytes */
+
+/*
+ * FAT boot sector and boot parameter block for
+ * FAT32 volumes
+ */
+typedef struct fat32_bsbpb {
+	/* common fields */
+	uint8_t BS_jmpBoot[3];
+	uint8_t BS_OEMName[8];
+	uint8_t BPB_BytsPerSec[2];
+	uint8_t BPB_SecPerClus;
+	uint8_t BPB_RsvdSecCnt[2];
+	uint8_t BPB_NumFATs;
+	uint8_t BPB_RootEntCnt[2];
+	uint8_t BPB_TotSec16[2];
+	uint8_t BPB_Media;
+	uint8_t BPB_FATSz16[2];
+	uint8_t BPB_SecPerTrack[2];
+	uint8_t BPB_NumHeads[2];
+	uint8_t BPB_HiddSec[4];
+	uint8_t BPB_TotSec32[4];
+	/* FAT32 only fields */
+	uint8_t BPB_FATSz32[4];
+	uint8_t BPB_ExtFlags[2];
+	uint8_t BPB_FSVer[2];
+	uint8_t BPB_RootClus[4];
+	uint8_t BPB_FSInfo[2];
+	uint8_t BPB_BkBootSec[2];
+	uint8_t BPB_Reserved[12];
+	uint8_t BS_DrvNum;
+	uint8_t BS_Reserved1;
+	uint8_t BS_BootSig;
+	uint8_t BS_VolID[4];
+	uint8_t BS_VolLab[11];
+	uint8_t BS_FilSysType[8];
+} FAT32_BSBPB; /* 90 bytes */
+
+/*
+ * FAT directory entry structure
+ */
+#define	FAT_DES_ATTR_READ_ONLY	0x01
+#define	FAT_DES_ATTR_HIDDEN	0x02
+#define	FAT_DES_ATTR_SYSTEM	0x04
+#define	FAT_DES_ATTR_VOLUME_ID	0x08
+#define	FAT_DES_ATTR_DIRECTORY	0x10
+#define	FAT_DES_ATTR_ARCHIVE	0x20
+#define	FAT_DES_ATTR_LONG_NAME	(FAT_DES_ATTR_READ_ONLY |		\
+				 FAT_DES_ATTR_HIDDEN |			\
+				 FAT_DES_ATTR_SYSTEM |			\
+				 FAT_DES_ATTR_VOLUME_ID)
+
+typedef struct fat_des {
+	uint8_t DIR_Name[11];
+	uint8_t DIR_Attr;
+	uint8_t DIR_NTRes;
+	uint8_t DIR_CrtTimeTenth;
+	uint8_t DIR_CrtTime[2];
+	uint8_t DIR_CrtDate[2];
+	uint8_t DIR_LstAccDate[2];
+	uint8_t DIR_FstClusHI[2];
+	uint8_t DIR_WrtTime[2];
+	uint8_t DIR_WrtDate[2];
+	uint8_t DIR_FstClusLO[2];
+	uint8_t DIR_FileSize[4];
+} FAT_DES;