Community wiki

Community wiki
VFS System

VFS Classes

Virtual File System.
The new VFS Classes are realized via Stream Wrappers.
Most documentation is done in the classes itself.

The class is

  • instatiated class
  • and static functions.


  • iface_stream_wrapper
  • oldvfs_stream_wrapper
  • vfs_stream_wrapper
  • sqlfs_stream_wrapper
  • egw_vfs

oldvfs_stream_wrapper instantiates the iface_stream_wrapper
all methods must be implemented (since the iface_stream_wrapper is defined as php5 interface)
Some more functions are implemented with the derived classes (touch, chown, chmod, etc).

main thing is, that there is a whole lot of stats for all possible actions regarding files and dirs, these will
be cached in a stat-cache, that improves performance for that request.

vfs_stream_wrapper does implement a new class/style sqlfs with fstab and the possibility of mounting any allowed
vfs path. The path is resolved first thing before accessing the URL given by the request.
a call may be:
./cli.php ls -l vfs://ralf:PASSWORD@default
./cli.php ls -l vfs://root_USER:PASSWORD@default where USER is the Config or headeradmin user and PASSSWORD its password.
./cli.php ls -l oldvfs://ralf:PASSWORD@default
Security is realized via a user concept. Mounts or any access must be realized using a existing user.
A concept of a root user is implemented, as known for most Linux/Unix users. This user is specified
by prepending root_ before the USER:PASSWORD Sequence.

We make extensive use of the new find function, since it gives the possibility of recursively accessing
the mounted path. the find function allowes for a callback of the desired functionality.

SQLFS implements Groupfolders with inheritance of user rights of from top to childs, that way files
can be accessed by all groupmembers. Even if a file is created only with userrights.
If you have only readrights in a folder, you see only the objects you are allowed to see/access.

The native StreamWrapper? uses the WebServer? User to determine readability and writeablity.
The derived classes do use virtual users/group rights derived from known eGroupware users/groups.


oldvfs stream wrapper interface
all in memory done all in chunks
  filter/encoding possible while reading/writing
  SqlFS uses the php pdo interface to access blobs of all possible databases via stream reading/writing (you need to install the pdo extension for php)

Commandline Interface

Commandline interface must be run with root or webserver rights.
[root@farm01 inc]# ../../filemanager/cli.php                                                                      
Usage:  cli.php ls [-r|--recursive] URL [URL2 ...]                                                                
        cli.php cat URL [URL2 ...]                                                                                
        cli.php cp [-r|--recursive] [-p|--perms] URL-from URL-to                                                  
        cli.php cp [-r|--recursive] [-p|--perms] URL-from [URL-from2 ...] URL-to-directory                        
        cli.php rm [-r|--recursive] URL [URL2 ...]                                                                
        cli.php mkdir [-p|--parents] URL [URL2 ...]                                                               
        cli.php rmdir URL [URL2 ...]                                                                              
        cli.php touch [-r|--recursive] [-d|--date time] URL [URL2 ...]                                            
        cli.php chmod [-r|--recursive] mode=[ugoa]*[+-=][rwx]+,... URL [URL2 ...]                                 
        cli.php chown [-r|--recursive] user URL [URL2 ...]                                                        
        cli.php chgrp [-r|--recursive] group URL [URL2 ...]                                                       
        cli.php find URL [URL2 ...] [-type (d|f)][-dirs_last][-mime type[/sub]][-name pattern][-path pattern]
           [-uid id][-user name][-nouser][-gid id][-group name][-nogroup][-size N][-cmin N][-ctime N][-mmin N]
           [-mtime N] (N: +n --> >n, -n --> <n, n --> =n)                                                                                        
        cli.php mount URL [path] (without path prints out the mounts)                                             
        cli.php umount URL|path                                                                                   
URL: {vfs|sqlfs|oldvfs}://user:password@domain/home/user/file, /dir/file, ...                                     
Use root_{header-admin|config-user} as user and according password for root access (no user specific access control and chown).                                                                                                     

Example Calls

An example call for a readonly mount, given that the setup user name is "admin" with "adminPassword":
./filemanager/cli.php mount 'filesystem://root_admin:adminPassword@default/home/user?user=groupwareUser&mode=005' /home/groupwareUser/harddrive
Note that the user given in the "user=" option must exist in eGroupware. It defaults to "root". Usually the option "user=root" will not work because "root" is not a valid egroupware user but just a name for the superuser (setup user).

An example for a mount list:
./filemanager/cli.php mount --user root_admin --password adminPassword

More options for the URL syntax can be found in the Stream Wrapper Source Code.

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