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CHAPTER 3: File System Access Using File and Folder objects 41

The home directory

A path name can start with a tilde (~) to indicate the user’s home directory. It corresponds to the platform’s

HOME environment variable.

UNIX and Mac OS assign the

HOME environment variable according to the user login. On Mac OS, the

default home directory is

/Users/username. In UNIX, it is typically /home/username or /users/username.

ExtendScript assigns the home directory value directly from the platform value.

On Windows, the

HOME environment variable is optional. If it is assigned, its value must be a Windows path

name or a path name referring to a remote server (such as

\\myhost\mydir). If the HOME environment

variable is undefined, the ExtendScript default is the user’s home directory, usually the

C:\Documents and

Settings\username

folder.

OTE: A script can access many of the folders that are specified with platform-specific variables through

static, globally available

Folder class properties; for instance, appData contains the folder that stores

application data for all users.

Volume and drive names

A volume or drive name can be the first part of an absolute path in URI notation. The values are interpreted

according to the platform.

Mac OS volumes

When Mac OS X starts, the startup volume is the root directory of the file system. All other volumes,

including remote volumes, are part of the

/Volumes directory. The File and Folder objects use these

rules to interpret the first element of a path name:

X If the name is the name of the startup volume, discard it.

X If the name is a volume name, prepend /Volumes.

X Otherwise, leave the path as is.

Mac OS 9 is not supported as an operating system, but the use of the colon as a path separator is still

supported and corresponds to URI and to Mac OS X paths as shown in the following table. These examples

assume that the startup volume is

MacOSX, and that there is a mounted volume Remote.

Windows drives

On Windows, volume names correspond to drive letters. The URI path

/c/temp/file normally translates

to the Windows path

C:\temp\file.

If a drive exists with a name matching the first part of the path, that part is always interpreted as that drive.

It is possible for there to be a folder in the root that has the same name as the drive; imagine, for example,

URI path name Mac OS 9 path name Mac OS X path name

/MacOSX/dir/file MacOSX:dir:file /dir/file

/Remote/dir/file Remote:dir:file /Volumes/Remote/dir/file

/root/dir/file Root:dir:file /root/dir/file

~/dir/file /Users/jdoe/dir/file

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 303 304

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