Is the following expected?
# printf "\xa2" | dd of=/dev/port bs=1 count=1 skip=675
0+0 records in
0+0 records out
0 bytes transferred in 0.001999 seconds (0 bytes/sec)
# printf "$?\n"
0
I run it as root. Why there were 0 bytes transferred and still it is
a 0 return code? Is there any significance in the fact that there were
0+0 records in? A delay must be used? Should I use ioperm (2) before?
Anything else?
It is kernel 2.6.7-2 on a Debian system.
I believe I can read, although I am still try to verify that the
output is what is expected:
$ dd if=/dev/port bs=1 count=5 skip=672 | od -b
dd: opening `/dev/port': Permission denied
0000000
$
# dd if=/dev/port bs=1 count=5 skip=672 | od -b
5+0 records in
5+0 records out
5 bytes transferred in 0.000461 seconds (10846 bytes/sec)
0000000 377 377 377 000 000
0000005
#
--
"If you have an apple and I have an apple and we exchange apples then
you and I will still each have one apple. But if you have an idea and I
have an idea and we exchange these ideas, then each of us will have two
ideas." -- George Bernard Shaw (sent by shaulk @ 013 . net . il)
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