#!/bin/sh
TEST_FILE=$(mktemp)
echo "== Testing sysctl behavior against ${TARGET} =="
set_orig()
{
echo "${ORIG}" > "${TARGET}"
}
set_test()
{
echo "${TEST_STR}" > "${TARGET}"
}
verify()
{
local seen
seen=$(cat "$1")
if [ "${seen}" != "${TEST_STR}" ]; then
return 1
fi
return 0
}
trap 'set_orig; rm -f "${TEST_FILE}"' EXIT
rc=0
echo -n "Writing test file ... "
echo "${TEST_STR}" > "${TEST_FILE}"
if ! verify "${TEST_FILE}"; then
echo "FAIL" >&2
exit 1
else
echo "ok"
fi
echo -n "Checking sysctl is not set to test value ... "
if verify "${TARGET}"; then
echo "FAIL" >&2
exit 1
else
echo "ok"
fi
echo -n "Writing sysctl from shell ... "
set_test
if ! verify "${TARGET}"; then
echo "FAIL" >&2
exit 1
else
echo "ok"
fi
echo -n "Resetting sysctl to original value ... "
set_orig
if verify "${TARGET}"; then
echo "FAIL" >&2
exit 1
else
echo "ok"
fi
# Now that we've validated the sanity of "set_test" and "set_orig",
# we can use those functions to set starting states before running
# specific behavioral tests.
echo -n "Writing entire sysctl in single write ... "
set_orig
dd if="${TEST_FILE}" of="${TARGET}" bs=4096 2>/dev/null
if ! verify "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
echo -n "Writing middle of sysctl after synchronized seek ... "
set_test
dd if="${TEST_FILE}" of="${TARGET}" bs=1 seek=1 skip=1 2>/dev/null
if ! verify "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
echo -n "Writing beyond end of sysctl ... "
set_orig
dd if="${TEST_FILE}" of="${TARGET}" bs=20 seek=2 2>/dev/null
if verify "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
echo -n "Writing sysctl with multiple long writes ... "
set_orig
(perl -e 'print "A" x 50;'; echo "${TEST_STR}") | \
dd of="${TARGET}" bs=50 2>/dev/null
if verify "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
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