► |  | Reading Writing ".DS_ Store" Files

1 | ".DS_ Store" Files and Entries
2 | Finder Aliases
| Bibliography

Reading Writing ".DS_ Store" Files
1`` ".DS_ Store" Files and Entries
read-ds-store
write-ds-store
ds
iloc
fwind
2`` Finder Aliases
path->alias-bytes
Bibliography

8.2
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## Reading Writing ".DS_Store" Files

A ".DS_Store" file is a metadata file on Mac OS X that holds information about folder and icons as viewed and manipulated in Finder. One common reason to manipulate ".DS_Store" files is to create a nice-looking disk image for a Mac OS X installer.

".DS_Store" reading and writing is based on a reverse-engineered description of the file format [DS_Store].

### 1`` ".DS_Store" Files and Entries

(require ds-store) | package: ds-store-lib

> > procedure

> > (read-ds-store path [#:verbose verbose?]) → (listof ds?)

> path : path-string?
> verbose? : any/c = #f

Reads the ".DS_Store" file at path returning a list of store items.

> > procedure

> > (write-ds-store path dses) → void?

> path : path-string?
> dses : (listof ds?)

Writes dses to the ".DS_Store" file at path, replacing the file’s current content.

> > struct

> > (struct |  | ds (path id type data)

> #:transparent)
> path : (or/c path-element? 'same)
> id : symbol?
> type : (or/c 'long 'shor 'bool 'type 'ustr 'blob)

> data

> :

> (or/c exact-integer? boolean? symbol? string?
> bytes? iloc? fwind?)

Represents a entry in a ".DS_Store" file. A ".DS_Store" file typically has multiple entries for a single file or directory in the same directory as the ".DS_Store".

The path should be 'same only for a volume root directory; information about a directory is otherwise recorded in its parent directory’s ".DS_Store" file.

The id symbols should each have four ASCII characters. See the ".DS_Store" format description [DS_Store] for more information id and type values.

The data field long should be an exact integer for 'long and 'shor types, a boolean for the 'bool type, a 4-character ASCII symbol for the 'type type, a string for the 'ustr type, and either a byte string, iloc, or fwind for the 'blob type.

> > struct

> > (struct |  | iloc (x y)

> #:transparent)
> x : exact-integer?
> y : exact-integer?

Represents an icon location for an 'Iloc entry.

> > struct

> > (struct |  | fwind (t l b r mode sideview?)

> #:transparent)
> t : exact-integer?
> l : exact-integer?
> b : exact-integer?
> r : exact-integer?
> mode : symbol?
> sideview? : any/c

Represent a window location for a 'fwi0 entry. The mode field should have four ASCII characters, and recognized modes include 'icnv, 'clmv, and 'Nlsv.

### 2`` Finder Aliases

A 'pict entry in a ".DS_Store" file references a file through a Finder alias.

(require ds-store/alias) | package: ds-store-lib

> > procedure

> > (path->alias-bytes path [#:wrt wrt-dir]) → (or/c bytes? #f)

> path : path-string?
> wrt-dir : (or/c #f path-string?) = #f

Constructs a byte string to represent a Finder alias but using the "CoreFoundation" library on Mac OS X.

### Bibliography

[DS_Store] |  | Wim Lewis and Mark Mentovai, “DS_Store Format.” http://search.cpan.org/~wiml/Mac-Finder-DSStore/DSStoreFormat.pod

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