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tests: Pretend the RNG is initialized withinthe VM

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We don't particularly care about the quality of random numbers
during the test. So far, there hasn't been an issue with the
RNG not being initialized completely, we only get a few prints
about uninitialized reads from urandom. However, if some tool
were to actually use /dev/random, it might get stuck. Call the
RNDADDTOENTCNT ioctl to unblock this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-04-11 11:41:20 +02:00 committed by Jouni Malinen
parent 52e2516f1d
commit 2f336ca580
1 changed files with 5 additions and 0 deletions
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5
tests/hwsim/vm/inside.sh
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@ -58,6 +58,11 @@ ln -s /proc/self/fd/0 /dev/stdin
ln -s /proc/self/fd/1 /dev/stdout
ln -s /proc/self/fd/2 /dev/stderr
# pretend we've initialized the RNG, we don't care here
# about the actual quality of the randomness. The ioctl
# is RNDADDTOENTCNT (at least on x86).
PYTHONHASHSEED=0 python3 -c 'import fcntl; fd=open("/dev/random", "w"); fcntl.ioctl(fd.fileno(), 0x40045201, b"\x00\x01\x00\x00")'
echo "VM has started up" > /dev/ttyS0
# create stub sudo - everything runs as uid 0