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mount.posixovl

mount.posixovl

Section: User Commands (1) Updated: 2010-06-15
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NAME

posixovl -- FUSE file system that provides POSIX functionality  

SYNOPSIS

    mount.posixovl [-F] [-S SOURCE_DIR] TARGET_DIR [-- fuseopts]

 

DESCRIPTION

If no source directory is given, the TARGET_DIR specifies both source and target (mount point), yielding an ``over mount''.

Supports: chmod, chown, hardlink, mkfifo, mknod, symlink/readlink ACLs/xattrs (only in passthrough mode, no emulation).  

NOTES

Using posixovl on an already POSIX-behaving file system (e.g. XFS) incurs some issues, since detecting whether a path is POSIX behaving or not is difficult. Hence, the following decision was made:

    - permissions will be set to the default permissions (see below) unless
      a HCB is found that can override these
    - all lower-level files will be operated on/created with the user who
      initiated the mount

If no HCB exists for a file or directory, the default permissions are 644 and 755, respectively. The owner and group of the inode will be the owner/group of the real file.

Each non-regular, non-directory virtual file will have a zero-size real file. Simplifies handling, and makes it apparent the object exists when using other operating system.

Command df(1) will show:

    $ df -Tah
    File System    Type    Size  Used Avail Use% Mounted on
    /dev/hda5     vfat    5.9G  2.1G  3.9G  35% /windows/D
    posix-overlay(/windows/D)
         fuse.posixovl    5.9G  2.1G  3.9G  35% /windows/D

 

OPTIONS

-F
Option -F will disable permission and ownership checks that would be required in case you have a POSIX mount over VFAT. For example, where /vfat is vfat, and /vfat/xfs is a POSIX-behaving file system.
 

EXAMPLES

In general, posixovl does not handle case-insensitivity of the underlying file system (in case of VFAT, for example). If you create a file X0 on VFAT, it is usually lowercased to x0, which may break some software, namely X.org. In order to make VFAT behave more POSIX-like, the following mount options are recommended:

    mount -t vfat /dev/sda5 /mnt/vfat -o check=s,shortname=mixed

 

ENVIRONMENT

None.  

FILES

None.  

SEE ALSO

mount(1) umount(1)  

AUTHORS

Program was written by Jan Engelhardt <jengelh@users.sourceforge.net>.

This manual page was written by Jari Aalto <jari.aalto@cante.net>, for the Debian GNU system (but may be used by others). Released under license GNU GPL version 2 or (at your option) any later version. For more information about license, visit <http://www.gnu.org/copyleft/gpl.html>.


 

Index

NAME
SYNOPSIS
DESCRIPTION
NOTES
OPTIONS
EXAMPLES
ENVIRONMENT
FILES
SEE ALSO
AUTHORS

This document was created by man2html, using the manual pages.
Time: 21:24:02 GMT, April 16, 2011