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[src/trunk]: src/usr.sbin/fstyp fstyp: Add exFAT support



details:   https://anonhg.NetBSD.org/src/rev/ab1bc2e6d6fd
branches:  trunk
changeset: 966853:ab1bc2e6d6fd
user:      tkusumi <tkusumi%NetBSD.org@localhost>
date:      Mon Nov 18 14:53:34 2019 +0000

description:
fstyp: Add exFAT support

Taken-from: FreeBSD and DragonFlyBSD

diffstat:

 usr.sbin/fstyp/Makefile |   4 +-
 usr.sbin/fstyp/exfat.c  |  78 +++++++++++++++++++++++++++++++++++++++++++++++++
 usr.sbin/fstyp/fstyp.8  |   8 +++-
 usr.sbin/fstyp/fstyp.c  |   5 +-
 usr.sbin/fstyp/fstyp.h  |   3 +-
 5 files changed, 90 insertions(+), 8 deletions(-)

diffs (176 lines):

diff -r 4e3d30c215ae -r ab1bc2e6d6fd usr.sbin/fstyp/Makefile
--- a/usr.sbin/fstyp/Makefile   Mon Nov 18 12:06:26 2019 +0000
+++ b/usr.sbin/fstyp/Makefile   Mon Nov 18 14:53:34 2019 +0000
@@ -1,9 +1,9 @@
-#      $NetBSD: Makefile,v 1.5 2019/06/24 08:27:21 hannken Exp $
+#      $NetBSD: Makefile,v 1.6 2019/11/18 14:53:34 tkusumi Exp $
 
 .include <bsd.own.mk>
 
 PROG=  fstyp
-SRCS=  cd9660.c ext2fs.c fstyp.c msdosfs.c ntfs.c ufs.c
+SRCS=  cd9660.c exfat.c ext2fs.c fstyp.c msdosfs.c ntfs.c ufs.c
 
 .if (${MKZFS} != "no")
 SRCS+= zfs.c
diff -r 4e3d30c215ae -r ab1bc2e6d6fd usr.sbin/fstyp/exfat.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/usr.sbin/fstyp/exfat.c    Mon Nov 18 14:53:34 2019 +0000
@@ -0,0 +1,78 @@
+/*     $NetBSD: exfat.c,v 1.1 2019/11/18 14:53:34 tkusumi Exp $        */
+
+/*
+ * Copyright (c) 2017 Conrad Meyer <cem%FreeBSD.org@localhost>
+ * 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 AUTHOR 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 AUTHOR 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.
+ */
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: exfat.c,v 1.1 2019/11/18 14:53:34 tkusumi Exp $");
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "fstyp.h"
+
+struct exfat_vbr {
+       char            ev_jmp[3];
+       char            ev_fsname[8];
+       char            ev_zeros[53];
+       uint64_t        ev_part_offset;
+       uint64_t        ev_vol_length;
+       uint32_t        ev_fat_offset;
+       uint32_t        ev_fat_length;
+       uint32_t        ev_cluster_offset;
+       uint32_t        ev_cluster_count;
+       uint32_t        ev_rootdir_cluster;
+       uint32_t        ev_vol_serial;
+       uint16_t        ev_fs_revision;
+       uint16_t        ev_vol_flags;
+       uint8_t         ev_log_bytes_per_sect;
+       uint8_t         ev_log_sect_per_clust;
+       uint8_t         ev_num_fats;
+       uint8_t         ev_drive_sel;
+       uint8_t         ev_percent_used;
+} __packed;
+
+int
+fstyp_exfat(FILE *fp, char *label, size_t size)
+{
+       struct exfat_vbr *ev;
+
+       ev = (struct exfat_vbr *)read_buf(fp, 0, 512);
+       if (ev == NULL || strncmp(ev->ev_fsname, "EXFAT   ", 8) != 0)
+               goto fail;
+
+       /*
+        * Reading the volume label requires walking the root directory to look
+        * for a special label file.  Left as an exercise for the reader.
+        */
+       free(ev);
+       return (0);
+
+fail:
+       free(ev);
+       return (1);
+}
diff -r 4e3d30c215ae -r ab1bc2e6d6fd usr.sbin/fstyp/fstyp.8
--- a/usr.sbin/fstyp/fstyp.8    Mon Nov 18 12:06:26 2019 +0000
+++ b/usr.sbin/fstyp/fstyp.8    Mon Nov 18 14:53:34 2019 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: fstyp.8,v 1.2 2018/01/09 09:41:29 wiz Exp $
+.\" $NetBSD: fstyp.8,v 1.3 2019/11/18 14:53:34 tkusumi Exp $
 .\"
 .\" Copyright (c) 2017 The NetBSD Foundation, Inc.
 .\" Copyright (c) 2016 The DragonFly Project
@@ -34,7 +34,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd November 25, 2017
+.Dd November 19, 2019
 .Dt FSTYP 8
 .Os
 .Sh NAME
@@ -48,7 +48,7 @@
 The
 .Nm
 utility is used to determine the file system type on a given device.
-It can recognize ISO-9660, Ext2, FAT, NTFS, and UFS file systems.
+It can recognize ISO-9660, exFAT, Ext2, FAT, NTFS, and UFS file systems.
 When the
 .Fl u
 flag is specified,
@@ -64,6 +64,8 @@
 .It
 cd9660
 .It
+exfat
+.It
 ext2fs
 .It
 msdosfs
diff -r 4e3d30c215ae -r ab1bc2e6d6fd usr.sbin/fstyp/fstyp.c
--- a/usr.sbin/fstyp/fstyp.c    Mon Nov 18 12:06:26 2019 +0000
+++ b/usr.sbin/fstyp/fstyp.c    Mon Nov 18 14:53:34 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fstyp.c,v 1.2 2018/01/09 10:47:57 martin Exp $ */
+/*     $NetBSD: fstyp.c,v 1.3 2019/11/18 14:53:34 tkusumi Exp $        */
 
 /*-
  * Copyright (c) 2017 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
  *
  */
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: fstyp.c,v 1.2 2018/01/09 10:47:57 martin Exp $");
+__RCSID("$NetBSD: fstyp.c,v 1.3 2019/11/18 14:53:34 tkusumi Exp $");
 
 #include <sys/disklabel.h>
 #include <sys/dkio.h>
@@ -64,6 +64,7 @@
        bool            unmountable;
 } fstypes[] = {
        { "cd9660", &fstyp_cd9660, false },
+       { "exfat", &fstyp_exfat, false },
        { "ext2fs", &fstyp_ext2fs, false },
        { "msdosfs", &fstyp_msdosfs, false },
        { "ntfs", &fstyp_ntfs, false },
diff -r 4e3d30c215ae -r ab1bc2e6d6fd usr.sbin/fstyp/fstyp.h
--- a/usr.sbin/fstyp/fstyp.h    Mon Nov 18 12:06:26 2019 +0000
+++ b/usr.sbin/fstyp/fstyp.h    Mon Nov 18 14:53:34 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fstyp.h,v 1.1 2018/01/09 03:31:15 christos Exp $       */
+/*     $NetBSD: fstyp.h,v 1.2 2019/11/18 14:53:34 tkusumi Exp $        */
 
 /*-
  * Copyright (c) 2017 The NetBSD Foundation, Inc.
@@ -44,6 +44,7 @@
 void   rtrim(char *, size_t);
 
 int    fstyp_cd9660(FILE *, char *, size_t);
+int    fstyp_exfat(FILE *fp, char *label, size_t size);
 int    fstyp_ext2fs(FILE *, char *, size_t);
 int    fstyp_msdosfs(FILE *, char *, size_t);
 int    fstyp_ntfs(FILE *, char *, size_t);



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