Date: Fri, 13 Jan 2017 02:12:58 +0000 (UTC) From: "Conrad E. Meyer" <cem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r312003 - head/usr.sbin/fstyp Message-ID: <201701130212.v0D2Cw0j092852@repo.freebsd.org>
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Author: cem Date: Fri Jan 13 02:12:58 2017 New Revision: 312003 URL: https://svnweb.freebsd.org/changeset/base/312003 Log: fstyp(8): Detect exFAT filesystems Simply detect the exFAT filesystem name in the Volume Boot Record (superblock). PR: 214908 Reported by: <vermaden at interia.pl> Added: head/usr.sbin/fstyp/exfat.c (contents, props changed) Modified: head/usr.sbin/fstyp/Makefile head/usr.sbin/fstyp/fstyp.8 head/usr.sbin/fstyp/fstyp.c head/usr.sbin/fstyp/fstyp.h Modified: head/usr.sbin/fstyp/Makefile ============================================================================== --- head/usr.sbin/fstyp/Makefile Fri Jan 13 02:11:16 2017 (r312002) +++ head/usr.sbin/fstyp/Makefile Fri Jan 13 02:12:58 2017 (r312003) @@ -3,7 +3,7 @@ .include <src.opts.mk> PROG= fstyp -SRCS= cd9660.c ext2fs.c fstyp.c geli.c msdosfs.c ntfs.c ufs.c +SRCS= cd9660.c exfat.c ext2fs.c fstyp.c geli.c msdosfs.c ntfs.c ufs.c .if ${MK_ZFS} != "no" SRCS += zfs.c Added: head/usr.sbin/fstyp/exfat.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/usr.sbin/fstyp/exfat.c Fri Jan 13 02:12:58 2017 (r312003) @@ -0,0 +1,77 @@ +/* + * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#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); +} Modified: head/usr.sbin/fstyp/fstyp.8 ============================================================================== --- head/usr.sbin/fstyp/fstyp.8 Fri Jan 13 02:11:16 2017 (r312002) +++ head/usr.sbin/fstyp/fstyp.8 Fri Jan 13 02:12:58 2017 (r312003) @@ -27,7 +27,7 @@ .\" .\" $FreeBSD$ .\" -.Dd February 28, 2016 +.Dd January 12, 2017 .Dt FSTYP 8 .Os .Sh NAME @@ -43,7 +43,7 @@ The .Nm utility is used to determine the filesystem type on a given device. -It can recognize ISO-9660, Ext2, FAT, NTFS, and UFS filesystems. +It can recognize ISO-9660, exFAT, Ext2, FAT, NTFS, and UFS filesystems. When the .Fl u flag is specified, @@ -61,6 +61,8 @@ as, respectively: .It cd9660 .It +exfat +.It ext2fs .It geli Modified: head/usr.sbin/fstyp/fstyp.c ============================================================================== --- head/usr.sbin/fstyp/fstyp.c Fri Jan 13 02:11:16 2017 (r312002) +++ head/usr.sbin/fstyp/fstyp.c Fri Jan 13 02:12:58 2017 (r312003) @@ -57,6 +57,7 @@ static struct { bool unmountable; } fstypes[] = { { "cd9660", &fstyp_cd9660, false }, + { "exfat", &fstyp_exfat, true }, { "ext2fs", &fstyp_ext2fs, false }, { "geli", &fstyp_geli, true }, { "msdosfs", &fstyp_msdosfs, false }, Modified: head/usr.sbin/fstyp/fstyp.h ============================================================================== --- head/usr.sbin/fstyp/fstyp.h Fri Jan 13 02:11:16 2017 (r312002) +++ head/usr.sbin/fstyp/fstyp.h Fri Jan 13 02:12:58 2017 (r312003) @@ -39,6 +39,7 @@ char *checked_strdup(const char *s); void rtrim(char *label, size_t size); int fstyp_cd9660(FILE *fp, char *label, size_t size); +int fstyp_exfat(FILE *fp, char *label, size_t size); int fstyp_ext2fs(FILE *fp, char *label, size_t size); int fstyp_geli(FILE *fp, char *label, size_t size); int fstyp_msdosfs(FILE *fp, char *label, size_t size);
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