Opening an active text file

[Andrew Duane X5993]

In <4320 at june.cs.washington.edu>, Kenneth Almquist indicates
that the following actions are illegal (ETXTBUSY):

	1)  Opening a file that is being executed.
	2)  Executing an open file.
	3)  Deleting the last link to a file that is being executed.

(1) and (2) are somewhat wrong. Only WRITE access is
incompatible with execute access. (1) should be "opening a file
for writing that is being executed", and (2) should be
"executing a file that is open for write". Check the manual
pages on this [try intro(2) and exec*(2)]

(3) is handled invisibly by the kernel. The image stays around
as long as it is being executed, then disappears.

Andrew L. Duane (JOT-7)  w:(617)-658-5600 X5993  h:(617)-475-9188
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