VFS class functions

VFS class functions Jason Wies June 2001 VFS class functions class vfs

abstract: virtual file system

description: Authors: Zone, Seek3r

class path_class

abstract: helper class for path_parts

vfs

abstract: constructor, sets up variables

function vfs ()

set_relative

abstract: Set path relativity

param: $mask Relative bitmask (see RELATIVE_ defines)

function set_relative ($mask)

get_relative

abstract: Return relativity bitmask

discussion: Returns relativity bitmask, or the default of "completely relative" if unset

function get_relative ()

sanitize

abstract: Removes leading .'s from $string

discussion: You should not pass all filenames through sanitize () unless you plan on rejecting

.files. Instead, pass the name through securitycheck () first, and if it fails,

pass it through sanitize

param: $string string to sanitize

result: $string without it's leading .'s

function sanitize ($string)

securitycheck

abstract: Security check function

discussion: Checks for basic violations such as ..

If securitycheck () fails, run your string through vfs->sanitize ()

param: $string string to check security of

result: Boolean True/False. True means secure, False means insecure

function securitycheck ($string)

db_clean

abstract: Clean $string for use in database queries

param: $string String to clean

result: Cleaned version of $string

function db_clean ($string)

path_parts

abstract: take a real or fake pathname and return an array of its component parts

param: $string full real or fake path

param: $relatives Relativity array

param: $object True returns an object instead of an array

result: $rarray/$robject Array or object containing the fake and real component parts of the path

discussion: Returned values are:

mask

outside

fake_full_path

fake_leading_dirs

fake_extra_path

fake_name

real_full_path

real_leading_dirs

real_extra_path

real_name

fake_full_path_clean

fake_leading_dirs_clean

fake_extra_path_clean

fake_name_clean

real_full_path_clean

real_leading_dirs_clean

real_extra_path_clean

real_name_clean

"clean" values are run through vfs->db_clean () and

are safe for use in SQL queries that use key='value'

They should be used ONLY for SQL queries, so are used

mostly internally

mask is either RELATIVE_NONE or RELATIVE_NONE|VFS_REAL,

and is used internally

outside is boolean, True if $relatives contains VFS_REAL

function path_parts ($string, $relatives = array (RELATIVE_CURRENT), $object = True)

getabsolutepath

abstract: get the absolute path

param: $target defaults to False, directory/file to get path of, relative to $relatives[0]

param: $mask Relativity bitmask (see RELATIVE_ defines). RELATIVE_CURRENT means use $this->relative

param: $fake Returns the "fake" path, ie /home/user/dir/file (not always possible. use path_parts () instead)

result: $basedir Full fake or real path

function getabsolutepath ($target = False, $relatives = array (RELATIVE_CURRENT), $fake = True)

abstract: Change directory

discussion: To cd to the files root "/", use cd ("/", False, array (RELATIVE_NONE));

param: $target default "/". directory to cd into. if "/" and $relative is True, uses "/home/<working_lid>";

param: $relative default True/relative means add target to current path, else pass $relative as mask to getabsolutepath()

function cd ($target = "/", $relative = True, $relatives = array (RELATIVE_CURRENT))

pwd

abstract: current working dir

param: $full default True returns full fake path, else just the extra dirs (false strips the leading /)

result: $currentdir currentdir

function pwd ($full = True)

read

abstract: return file contents

param: $file filename

param: $relatives Relativity array

result: $contents Contents of $file, or False if file cannot be read

function read ($file, $relatives = array (RELATIVE_CURRENT))

write

abstract: write to a file

param: $file file name

param: $relatives Relativity array

param: $contents contents

result: Boolean True/False

function write ($file, $relatives = array (RELATIVE_CURRENT), $contents)

touch

abstract: Create blank file $file or set the modification time and modified by of $file to current time and user

param: $file File to touch or set modifies

param: $relatives Relativity array

result: Boolean True/False

function touch ($file, $relatives = array (RELATIVE_CURRENT))

abstract: copy file

param: $from from file/directory

param: $to to file/directory

param: $relatives Relativity array

result: boolean True/False

function cp ($from, $to, $relatives = array (RELATIVE_CURRENT, RELATIVE_CURRENT))

abstract: move file/directory

param: $from from file/directory

param: $to to file/directory

param: $relatives Relativity array

result: boolean True/False

function mv ($from, $to, $relatives = array (RELATIVE_CURRENT, RELATIVE_CURRENT))

move

abstract: shortcut to mv

function move ($from, $to, $relatives = array (RELATIVE_CURRENT, RELATIVE_CURRENT))

abstract: delete file/directory

param: $string file/directory to delete

param: $relatives Relativity array

result: boolean True/False

function rm ($string, $relatives = array (RELATIVE_CURRENT))

delete

abstract: shortcut to rm

function delete ($string, $relatives = array (RELATIVE_CURRENT))

mkdir

abstract: make a new directory

param: $dir Directory name

param: $relatives Relativity array

result: boolean True on success

function mkdir ($dir, $relatives = array (RELATIVE_CURRENT))

set_attributes

abstract: Update database entry for $file with the attributes in $attributes

param: $file file/directory to update

param: $relatives Relativity array

param: $attributes keyed array of attributes. key is attribute name, value is attribute value

result: Boolean True/False

discussion: Valid attributes are:

owner_id

createdby_id

modifiedby_id

created

modified

size

mime_type

deleteable

comment

app

function set_attributes ($file, $relatives = array (RELATIVE_CURRENT), $attributes = array ())

correct_attributes

abstract: Set the correct attributes for $string (e.g. owner)

param: $string File/directory to correct attributes of

param: $relatives Relativity array

result: Boolean True/False

function correct_attributes ($string, $relatives = array (RELATIVE_CURRENT))

file_type

abstract: return file/dir type (MIME or other)

param: $file File or directory path (/home/user/dir/dir2/dir3, /home/user/dir/dir2/file)

param: $relatives Relativity array

result: MIME type, "Directory", or nothing if MIME type is not known

function file_type ($file, $relatives = array (RELATIVE_CURRENT))

file_exists

abstract: check if file/directory exists

param: $string file/directory to check existance of

param: $relatives Relativity array

result: Boolean True/False

function file_exists ($string, $relatives = array (RELATIVE_CURRENT))

checkperms

abstract: Check if you have write access to create files in $dir

discussion: This isn't perfect, because vfs->touch () returns True even

if only the database entry worked. ACLs need to be

implemented for better permission checking. It's

also pretty slow, so I wouldn't recommend using it

often

param: $dir Directory to check access of

param: $relatives Relativity array

result: Boolean True/False

function checkperms ($dir, $relatives = array (RELATIVE_CURRENT))

abstract: get directory listing

discussion: Note: the entries are not guaranteed to be returned in any logical order

param: $dir Directory

param: $relatives Relativity array

param: $checksubdirs Boolean, recursively list all sub directories as well?

param: $mime_type Only return entries matching MIME-type $mime_type. Can be "Directory" or "\" for those without MIME types

param: $nofiles Boolean. True means you want to return just the information about the directory $dir. If $dir is a file, $nofiles is implied. This is the equivalent of 'ls -ld $dir'

result: array of arrays. Subarrays contain full info for each file/dir.

function ls ($dir = False, $relatives = array (RELATIVE_CURRENT), $checksubdirs = True, $mime_type = False, $nofiles = False)

dir

abstract: shortcut to ls

function dir ($dir = False, $relatives = array (RELATIVE_CURRENT), $checksubdirs = True, $mime_type = False, $nofiles = False)