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<H2><A NAME="s12">12. Format of Bootdisk_Contents</A></H2>
<P>
<P>For convenience, the format rules for entries in
<CODE>Bootdisk_Contents</CODE> is given in comments at the beginning of
that file. Here is a list of the allowable forms:
<P>
<UL>
<LI>Blank lines and whitespace may be used freely.</LI>
<LI>Lines beginning with # or % are comments.</LI>
<LI>Filenames may be either relative or absolute.
Any filename not beginning with a slash is relative and
will be resolved relative to the current directory.
</LI>
<LI>Lines of the form
<BLOCKQUOTE><CODE>
<PRE>
filename1 -> filename2
</PRE>
</CODE></BLOCKQUOTE>
will create symbolic (soft) links on the root filesystem. For example, if
you want <CODE>sh</CODE> linked to <CODE>bash</CODE> in the root filesystem, you specify:
<BLOCKQUOTE><CODE>
<PRE>
/bin/sh -> /bin/bash
</PRE>
</CODE></BLOCKQUOTE>
(There is no way to specify hard links, though hard linked files
that exist on the hard disk will be hard linked on the floppy.)
</LI>
<LI>Lines of the form <CODE>filename1 <= filename2</CODE> will cause filename2 to be
copied to filename1 on the boot disk. This is useful for specifying
trimmed-down replacements for /etc/passwd, /etc/inittab, etc. filename2 will
be found first by searching PATH, then by searching relative to the current
directory.
A useful variant of this is:
<BLOCKQUOTE><CODE>
<PRE>
filename1 <= /dev/null
</PRE>
</CODE></BLOCKQUOTE>
</LI>
<LI>Glob designations (?, * and [...]) are generally allowed, eg
<CODE>/dev/hd[ab]*</CODE>. Wildcards are not allowed in link specs or
replacement specs because no one knows what they mean.
</LI>
<LI>You may refer to environment variables in these specs by using
a dollar sign. $RELEASE will be set the the release string of
the kernel you specify (<CODE>$kernel</CODE>).
</LI>
</UL>
<P>In most cases you don't need to specify shared libraries or loaders. The
script will detect dependencies (via <CODE>ldd</CODE>) and include them
automatically. The exception for this is PAM.
<P>You don't need to explicitly specify intermediate directories unless you
just want to make sure they exist. For example, if you mention
/foo/bar/slog, Yard will make sure /foo and /foo/bar exist.
<P>
<P>
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