Autzoo.1052
net.v7bugs
utzoo!henry
Sat Oct 24 19:27:01 1981
shell mail checking
Bill Reeves of Lucasfilm has found a subtle bug in the Bourne shell's
mail checking:  if the mailbox is temporarily nonexistent (some mail
systems remove an empty mailbox), the shell can get a garbage mail date
into its memory, which can effectively suppress mail checking thenceforth.
The fix is like this, in main.c (line numbers are approximate):

139,140c139,141
 			THEN
> 				IF mailtime THEN prs(mailmsg) FI
> 				mailtime=statb.st_mtime;
142d142

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article may be copied and distributed freely, provided:

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 Bruce Jones, Henry Spencer, David Wiseman.