# Directory Structure Image (DSI) File Format.

# Lines starting with hash ('#') characteres are comments.
# Hash characters inline are comments
# Support for characters in filenames is limited to ASCII (not extended ASCII)

The general format of data lines (i.e. non-commment lines) is:

<Element> <ElementData>

where <Element> is one of a fixed set of single-character values, and <ElementData> depends on <Element>.

<Element> can be one of i, d, D, f, s,

The format of various element line types is

i <PkgTag> <PkgMajorVersion> <PkgMinorVersion> <PkgDescription>
d <RelPath> <Owner>:<Group> <Perms> <Timestamp>
D <RelPath> <Owner>:<Group> <RecusrivePerms>
f <RelPath> <Owner>:<Group> <Perms> <MD5Checksum> <Timestamp>
s <RelPath> <Target> <TargetMD5Checksum>

<PkgTag> is the tag name for a product, e.g. 'fgs' for the Friendly Greeting System product.

The <Owner>:<Group> defines the Operating System owner and group, wit

<Perms> contains permission data, of the form <OwnerPerms>:<GroupPerms>:<OtherPerms>

There can be only one 'i' entry per DSI file, and it must be the first entry.

# Sample Friendly Greeting System file format, with tag 'fgs':
i fgs 1.0.1 509210 Friendly Greeting System
d src unset:unset 750
f src/hello.h unset:unset 640
f src/hello.c unset:unset 640
f src/Makefile unset:unset 640
f src/build.sh unset:unset 750