Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!killer!texbell!nuchat!sugar!ficc!peter
From: peter@ficc.uu.net (Peter da Silva)
Newsgroups: comp.unix.wizards
Subject: Re: Demand paged executables
Keywords: SYSTEM V see Bach
Message-ID: <2994@ficc.uu.net>
Date: 3 Feb 89 19:18:07 GMT
References: <409@lakart.UUCP> <1997@solo12.cs.vu.nl> <2765@rti.UUCP> <314@spca6.UUCP>
Organization: Xenix Support
Lines: 19

In article <314@spca6.UUCP>, ray@spca6.UUCP (ray) should probably go back to
Bach's book and re-read the stuff about what happend when you delete an open
file...

> Consider what might happen if an a.out with shared text is started (process A).
> Next the actual file is allowed to be removed.
> Later an executable is created and happens to land at the same inode that the
> previous a.out used.

Can't happen. This is exactly equivalent to what happens when you delete an
open file. What would happen is that the inode and file would hang around
with the open count >= 1. When the last process using that image terminated,
open count would == 0 and link count would == 0, and the file would be
reclaimed. New files would get new inodes until reclamation.
-- 
Peter da Silva, Xenix Support, Ferranti International Controls Corporation.
Work: uunet.uu.net!ficc!peter, peter@ficc.uu.net, +1 713 274 5180.   `-_-'
Home: bigtex!texbell!sugar!peter, peter@sugar.uu.net.                 'U`
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