MOUNT_MSDOS(8)

MOUNT_MSDOS(8) | NetBSD System Manager's Manual | MOUNT_MSDOS(8)

# NAME

mount_msdos — mount an MS-DOS file system

# SYNOPSIS

mount_msdos | [-9Gls] [-g gid] [-M mask] [-m mask] [-o options] [-t gmtoff] [-u uid] special node

# DESCRIPTION

The mount_msdos command attaches the MS-DOS filesystem residing on the device special to the global filesystem namespace at the location indicated by node. Both special and node are converted to absolute paths before use. 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).

Support for FAT16 and VFAT32 as well as long file names is available.

The options are as follows:

-9
  Ignore the special Win'95 directory entries even if deleting or renaming a file. This forces -s.
-G
  This option causes the filesystem to be interpreted as an Atari-Gemdos filesystem. The differences to the MS-DOS filesystem are minimal and limited to the boot block. This option enforces -s.
-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.
-l
  Force listing and generation of Win'95 long filenames and separate 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 the filesystem is not empty and no such entries are found, -s is the default. Otherwise -l is assumed.

-M mask
  Specify the maximum file permissions for directories in the file system. The value of -m is used if it is supplied and -M is omitted.
-m mask
  Specify the maximum file permissions for files in the file system. (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 value of -M is used if it is supplied and -m is omitted. The default mask is taken from the directory on which the file system is being mounted.
-o options
  Use the specified mount options, as described in mount(8).
-s
  Force behaviour to ignore and not generate Win'95 long filenames. See also -l.
-t gmtoff
  Set the time zone offset (in seconds) from UTC to gmtoff, with positive values indicating east of the Prime Meridian. If not set, the user's current time zone will be used.
-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.

# EXAMPLES

To remove the 'execute' permission bit for all files, but still keep directories searchable, use:

- mount_msdos -m 0644 -M 0755 /dev/wd0e /msdos

# SEE ALSO

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

# HISTORY

The mount_msdos utility first appeared in NetBSD 0.9. Its predecessor, the mount_pcfs utility appeared in NetBSD 0.8, and was abandoned in favor of the more aptly-named mount_msdos.

# BUGS

Compressed partitions are not supported.

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.

The default handling for -s and -l will result in empty filesystems to be populated with short filenames only. To generate long filenames on empty DOS filesystems use -l.

January 23, 2009 | NetBSD 5.99