Message-Id:	<3.0.1.32.19980126152727.007f4b50@yacker.xiotech.com>
Date:	Mon, 26 Jan 1998 15:27:27 -0600
To:	djgpp-workers AT delorie DOT com
From:	Randy Maas <randym AT acm DOT org>
Subject:	invent inode docs
Mime-Version:	1.0

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Since I "needed" stat for a fsext and patched stat.c I found a very useful,
but not quite documented (as far as I know) function that can help fill out
a stat structure: _invent_inode.

I swiped the excellent coment (written by Eli?) out of the source and
modified it to be a txh file.  It's attached.

Randy

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@node _invent_inode, file system
@subheading Syntax
@example
ino_t
_invent_inode(const char *name, unsigned time_stamp, unsigned long fsize)
@end example

@subheading Description
This invents an inode number for those files which don't have valid DOS
cluster number.  These could be:
@itemize @bullet
@item
 devices like @file{/dev/nul} or file system extensions
 (@pxref{File System Extensions})

@item
 empty files which were not allocated disk space yet

@item
 or files on networked drives, for which the redirector doesn't bring the
 cluster number.
@end itemize

To ensure proper operation of this function, you must call it with a filename
in some canonical form.  E.g., with a name returned by @code{truename()}
(@pxref{truename}), or that returned by @code{_fixpath()} (@pxref{_fixpath}).
The point here is that the entire program @emph{must} abide by these
conventions through its operation, or else you risk getting different inode
numbers for the same file.

@subheading Return Value
0 on error, otherwise the invented inode number for the file


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