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#!/bin/sh
FTPL="${FAKETIME_TESTLIB:-../src/libfaketime.so.1}"
set -e
error=0
for iface in getrandom getentropy; do
printf "Testing %s() interception...\n" "$iface"
"./${iface}_test" > "${iface}.alone"
LD_PRELOAD="$FTPL" "./${iface}_test" > "${iface}.preload"
FAKERANDOM_SEED=0x12345678DEADBEEF LD_PRELOAD="$FTPL" "./${iface}_test" > "${iface}.preload.seed0"
FAKERANDOM_SEED=0x12345678DEADBEEF LD_PRELOAD="$FTPL" "./${iface}_test" > "${iface}.preload.seed1"
FAKERANDOM_SEED=0x0000000000000000 LD_PRELOAD="$FTPL" "./${iface}_test" > "${iface}.preload.seed2"
if diff -u "${iface}.alone" "${iface}.preload" > /dev/null; then
error=1
printf >&2 '%s() without the LD_PRELOAD matches a run without LD_PRELOAD\n' "$iface"
fi
if diff -u "${iface}.preload" "${iface}.preload.seed0" > /dev/null; then
error=2
printf >&2 '%s() without a seed produced the same data as a run with a seed!\n' "$iface"
fi
if ! diff -u "${iface}.preload.seed0" "${iface}.preload.seed1"; then
error=3
printf >&2 '%s() with identical seeds differed!\n' "$iface"
fi
if diff -u "${iface}.preload.seed1" "${iface}.preload.seed2" >/dev/null; then
error=4
printf >&2 '%s() with different seeds produced the same data!\n' "$iface"
fi
rm -f "${iface}.alone" "${iface}.preload" "${iface}.preload.seed0" "${iface}.preload.seed1" "${iface}.preload.seed2"
done
FAKERANDOM_SEED=0xDEADBEEFDEADBEEF LD_PRELOAD="$FTPL" ./repeat_random 3 5 > repeat3x5
FAKERANDOM_SEED=0xDEADBEEFDEADBEEF LD_PRELOAD="$FTPL" ./repeat_random 5 3 > repeat5x3
if ! diff -u repeat3x5 repeat5x3; then
error=5
printf >&2 '5 calls of getrandom(3) did not produce the same stream as 3 calls of getrandom(5)\n'
fi
rm -f repeat3x5 repeat5x3
if [ 0 = $error ]; then
printf 'getrandom interception test successful.\n'
fi
exit $error
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