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MOUNT_MSDOS(8)	       DragonFly System Manager's Manual	MOUNT_MSDOS(8)


mount_msdos -- mount an MS-DOS file system


mount_msdos [-9ls] [-D DOS_codepage] [-g gid] [-L locale] [-m mask] [-o options] [-u uid] special node


The mount_msdos command attaches the MS-DOS filesystem residing on the device special to the global filesystem namespace at the location indi- cated by node. This command is normally executed by mount(8) at boot time, but can be used by any user to mount an MS-DOS file system on any directory that they own (provided, of course, that they have appropriate access to the device that contains the file system). The options are as follows: -o options Use the specified mount options, as described in mount(8), or one of the MS-DOS filesystem-specific options shortnames, longnames or nowin95, all of which can be used to affect Windows name translation in the underlying filesystem. -u uid Set the owner of the files in the file system to uid. The default owner is the owner of the directory on which the file system is being mounted. -g gid Set the group of the files in the file system to gid. The default group is the group of the directory on which the file system is being mounted. -m mask Specify the maximum file permissions for files in the file sys- tem. (For example, a mask of 755 specifies that, by default, the owner should have read, write, and execute permissions for files, but others should only have read and execute permissions. See chmod(1) for more information about octal file modes.) Only the nine low-order bits of mask are used. The default mask is taken from the directory on which the file system is being mounted. -s Force behaviour to ignore and not generate Win'95 long filenames. -l Force listing and generation of Win'95 long filenames and sepa- rate creation/modification/access dates. If neither -s nor -l are given, mount_msdos searches the root directory of the filesystem to be mounted for any existing Win'95 long filenames. If no such entries are found, but short DOS filenames are found, -s is the default. Otherwise -l is assumed. -9 Ignore the special Win'95 directory entries even if deleting or renaming a file. This forces -s. -L locale Specify locale name used for internal uppercase and lowercase conversions for DOS and Win'95 names. By default ISO 8859-1 assumed as local character set. -D DOS_codepage Specify the MS-DOS code page (aka IBM/OEM code page) name used for file name conversions for DOS names.


mount(2), unmount(2), fstab(5), mount(8)


The predecessor to mount_msdos utility named mount_pcfs appeared in 386BSD. It was rewritten in NetBSD 1.0 and first appeared in FreeBSD 2.0.


Initial implementation as mount_pcfs was written by Paul Popelka <paulp@uts.amdahl.com>. It was rewritten by Christopher G. Demetriou <cgd@NetBSD.org>.


The use of the -9 flag could result in damaged filesystems, albeit the damage is in part taken care of by procedures similar to the ones used in Win'95. FreeBSD 2.1 and earlier versions could not handle cluster sizes larger than 16K. Just mounting an MS-DOS file system could cause corruption to any mounted file system. Cluster sizes larger than 16K are unavoidable for file system sizes larger than 1G, and also occur when filesystems larger than 1G are shrunk to smaller than 1G using FIPS. DragonFly 5.3 September 29, 2016 DragonFly 5.3

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