Path: utzoo!utgpu!water!watmath!clyde!rutgers!cmcl2!nrl-cmf!ames!ptsfa!pacbell!tandem!narayan
From: narayan@tandem.UUCP (narayan mohanram TCP/IP Conso)
Newsgroups: comp.unix.wizards
Subject: Re: To find out the names of open files in a process
Message-ID: <339@tandem.UUCP>
Date: 20 Jan 88 18:03:00 GMT
References: <2346@mandrill.CWRU.Edu>
Organization: Tandem Computers, Cupertino,CA-development
Lines: 25

In article <2346@mandrill.CWRU.Edu>, garg@mandrill.CWRU.Edu (Dev Datt Garg) writes:
> 
 One of the features I am trying 
> to add is to be able to save the context of a process at any point in the 
> user program, so that at later stage program can be restarted from that point.
> I have got some success in doing that. I am having a problem, If the program,
> which I am debugging has some files open. I am unable to know which files were
>  open, so that the status of those files can be restored.

The conovoluted way to do that would be to look at the inode (incore)
by looking at u.u_ofile[x]->f_inode. This can then give you the
major/minor device number of the file that is open (You can also get
the seek pointers). You then have to search the mount table, and find
where this major/minor device is mounted, and then search the file system
for the necessary inode number. You can thus establish a path to the
file. 

Alternately you can write a simple character device driver that will
open a file given inode information. You can thus supply this as
an ioctl to the program that can then munge the internals of the
kernel data structures (XXX).

Narayan Mohanram

(narayan@ati.tis.llnl.gov)