:I was just playing with mmap() really for the first time, and I noticed
:something a bit odd. When you mmap() a file for writing, it also appears
:to require that you give it read permissions, else it dies on a signal 10.
:Any reason for this? (I'm using 3.3-STABLE (11/30/99) with the following
:program)
: -Brian
I've got a few hundred terrabytes of WOM to sell ya!
This is just a byproduct of the MMU implementation. Most MMU's do
not support write-only maps because most do not implement separate
read and write bits. You get a valid and a write-enable bit instead,
or you just get a valid bit and have to use the dirty bit to make the
page writable (no write-enable bit at all).
-Matt
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