#!/bin/sh SYSCTL="/proc/sys"TARGET="${SYSCTL}/kernel/domainname"ORIG=$(cat "${TARGET}")TEST_STR="Testing sysctl" . ./common_tests # Only string sysctls support seeking/appending.MAXLEN=65 echo -n "Writing entire sysctl in short writes ... "set_origdd if="${TEST_FILE}" of="${TARGET}" bs=1 2>/dev/nullif ! verify "${TARGET}"; then echo "FAIL" >&2 rc=1else echo "ok"fi echo -n "Writing middle of sysctl after unsynchronized seek ... "set_testdd if="${TEST_FILE}" of="${TARGET}" bs=1 seek=1 2>/dev/nullif verify "${TARGET}"; then echo "FAIL" >&2 rc=1else echo "ok"fi echo -n "Checking sysctl maxlen is at least $MAXLEN ... "set_origperl -e 'print "A" x ('"${MAXLEN}"'-2), "B";' | \ dd of="${TARGET}" bs="${MAXLEN}" 2>/dev/nullif ! grep -q B "${TARGET}"; then echo "FAIL" >&2 rc=1else echo "ok"fi echo -n "Checking sysctl keeps original string on overflow append ... "set_origperl -e 'print "A" x ('"${MAXLEN}"'-1), "B";' | \ dd of="${TARGET}" bs=$(( MAXLEN - 1 )) 2>/dev/nullif grep -q B "${TARGET}"; then echo "FAIL" >&2 rc=1else echo "ok"fi echo -n "Checking sysctl stays NULL terminated on write ... "set_origperl -e 'print "A" x ('"${MAXLEN}"'-1), "B";' | \ dd of="${TARGET}" bs="${MAXLEN}" 2>/dev/nullif grep -q B "${TARGET}"; then echo "FAIL" >&2 rc=1else echo "ok"fi echo -n "Checking sysctl stays NULL terminated on overwrite ... "set_origperl -e 'print "A" x ('"${MAXLEN}"'-1), "BB";' | \ dd of="${TARGET}" bs=$(( $MAXLEN + 1 )) 2>/dev/nullif grep -q B "${TARGET}"; then echo "FAIL" >&2 rc=1else echo "ok"fi exit $rc
#!/bin/sh
SYSCTL="/proc/sys"
TARGET="${SYSCTL}/kernel/domainname"
ORIG=$(cat "${TARGET}")
TEST_STR="Testing sysctl"
. ./common_tests
# Only string sysctls support seeking/appending.
MAXLEN=65
echo -n "Writing entire sysctl in short writes ... "
set_orig
dd if="${TEST_FILE}" of="${TARGET}" bs=1 2>/dev/null
if ! verify "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
echo -n "Writing middle of sysctl after unsynchronized seek ... "
set_test
dd if="${TEST_FILE}" of="${TARGET}" bs=1 seek=1 2>/dev/null
if verify "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
echo -n "Checking sysctl maxlen is at least $MAXLEN ... "
set_orig
perl -e 'print "A" x ('"${MAXLEN}"'-2), "B";' | \
dd of="${TARGET}" bs="${MAXLEN}" 2>/dev/null
if ! grep -q B "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
echo -n "Checking sysctl keeps original string on overflow append ... "
set_orig
perl -e 'print "A" x ('"${MAXLEN}"'-1), "B";' | \
dd of="${TARGET}" bs=$(( MAXLEN - 1 )) 2>/dev/null
if grep -q B "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
echo -n "Checking sysctl stays NULL terminated on write ... "
set_orig
perl -e 'print "A" x ('"${MAXLEN}"'-1), "B";' | \
dd of="${TARGET}" bs="${MAXLEN}" 2>/dev/null
if grep -q B "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
echo -n "Checking sysctl stays NULL terminated on overwrite ... "
set_orig
perl -e 'print "A" x ('"${MAXLEN}"'-1), "BB";' | \
dd of="${TARGET}" bs=$(( $MAXLEN + 1 )) 2>/dev/null
if grep -q B "${TARGET}"; then
echo "FAIL" >&2
rc=1
else
echo "ok"
fi
exit $rc