tools/testing/selftests/sysctl/run_stringtests

   1 #!/bin/sh
   2
   3 SYSCTL="/proc/sys"
   4 TARGET="${SYSCTL}/kernel/domainname"
   5 ORIG=$(cat "${TARGET}")
   6 TEST_STR="Testing sysctl"
   7
   8 . ./common_tests
   9
  10 # Only string sysctls support seeking/appending.
  11 MAXLEN=65
  12
  13 echo -n "Writing entire sysctl in short writes ... "
  14 set_orig
  15 dd if="${TEST_FILE}" of="${TARGET}" bs=1 2>/dev/null
  16 if ! verify "${TARGET}"; then
  17         echo "FAIL" >&2
  18         rc=1
  19 else
  20         echo "ok"
  21 fi
  22
  23 echo -n "Writing middle of sysctl after unsynchronized seek ... "
  24 set_test
  25 dd if="${TEST_FILE}" of="${TARGET}" bs=1 seek=1 2>/dev/null
  26 if verify "${TARGET}"; then
  27         echo "FAIL" >&2
  28         rc=1
  29 else
  30         echo "ok"
  31 fi
  32
  33 echo -n "Checking sysctl maxlen is at least $MAXLEN ... "
  34 set_orig
  35 perl -e 'print "A" x ('"${MAXLEN}"'-2), "B";' | \
  36         dd of="${TARGET}" bs="${MAXLEN}" 2>/dev/null
  37 if ! grep -q B "${TARGET}"; then
  38         echo "FAIL" >&2
  39         rc=1
  40 else
  41         echo "ok"
  42 fi
  43
  44 echo -n "Checking sysctl keeps original string on overflow append ... "
  45 set_orig
  46 perl -e 'print "A" x ('"${MAXLEN}"'-1), "B";' | \
  47         dd of="${TARGET}" bs=$(( MAXLEN - 1 )) 2>/dev/null
  48 if grep -q B "${TARGET}"; then
  49         echo "FAIL" >&2
  50         rc=1
  51 else
  52         echo "ok"
  53 fi
  54
  55 echo -n "Checking sysctl stays NULL terminated on write ... "
  56 set_orig
  57 perl -e 'print "A" x ('"${MAXLEN}"'-1), "B";' | \
  58         dd of="${TARGET}" bs="${MAXLEN}" 2>/dev/null
  59 if grep -q B "${TARGET}"; then
  60         echo "FAIL" >&2
  61         rc=1
  62 else
  63         echo "ok"
  64 fi
  65
  66 echo -n "Checking sysctl stays NULL terminated on overwrite ... "
  67 set_orig
  68 perl -e 'print "A" x ('"${MAXLEN}"'-1), "BB";' | \
  69         dd of="${TARGET}" bs=$(( $MAXLEN + 1 )) 2>/dev/null
  70 if grep -q B "${TARGET}"; then
  71         echo "FAIL" >&2
  72         rc=1
  73 else
  74         echo "ok"
  75 fi
  76
  77 exit $rc