tools/testing/selftests/sysctl/common_tests

   1 #!/bin/sh
   2
   3 TEST_FILE=$(mktemp)
   4
   5 echo "== Testing sysctl behavior against ${TARGET} =="
   6
   7 set_orig()
   8 {
   9         echo "${ORIG}" > "${TARGET}"
  10 }
  11
  12 set_test()
  13 {
  14         echo "${TEST_STR}" > "${TARGET}"
  15 }
  16
  17 verify()
  18 {
  19         local seen
  20         seen=$(cat "$1")
  21         if [ "${seen}" != "${TEST_STR}" ]; then
  22                 return 1
  23         fi
  24         return 0
  25 }
  26
  27 exit_test()
  28 {
  29         if [ ! -z ${old_strict} ]; then
  30                 echo ${old_strict} > ${WRITES_STRICT}
  31         fi
  32         exit $rc
  33 }
  34
  35 trap 'set_orig; rm -f "${TEST_FILE}"' EXIT
  36
  37 rc=0
  38
  39 echo -n "Writing test file ... "
  40 echo "${TEST_STR}" > "${TEST_FILE}"
  41 if ! verify "${TEST_FILE}"; then
  42         echo "FAIL" >&2
  43         exit 1
  44 else
  45         echo "ok"
  46 fi
  47
  48 echo -n "Checking sysctl is not set to test value ... "
  49 if verify "${TARGET}"; then
  50         echo "FAIL" >&2
  51         exit 1
  52 else
  53         echo "ok"
  54 fi
  55
  56 echo -n "Writing sysctl from shell ... "
  57 set_test
  58 if ! verify "${TARGET}"; then
  59         echo "FAIL" >&2
  60         exit 1
  61 else
  62         echo "ok"
  63 fi
  64
  65 echo -n "Resetting sysctl to original value ... "
  66 set_orig
  67 if verify "${TARGET}"; then
  68         echo "FAIL" >&2
  69         exit 1
  70 else
  71         echo "ok"
  72 fi
  73
  74 echo -n "Checking write strict setting ... "
  75 WRITES_STRICT="${SYSCTL}/kernel/sysctl_writes_strict"
  76 if [ ! -e ${WRITES_STRICT} ]; then
  77         echo "FAIL, but skip in case of old kernel" >&2
  78 else
  79         old_strict=$(cat ${WRITES_STRICT})
  80         if [ "$old_strict" = "1" ]; then
  81                 echo "ok"
  82         else
  83                 echo "FAIL, strict value is 0 but force to 1 to continue" >&2
  84                 echo "1" > ${WRITES_STRICT}
  85         fi
  86 fi
  87
  88 # Now that we've validated the sanity of "set_test" and "set_orig",
  89 # we can use those functions to set starting states before running
  90 # specific behavioral tests.
  91
  92 echo -n "Writing entire sysctl in single write ... "
  93 set_orig
  94 dd if="${TEST_FILE}" of="${TARGET}" bs=4096 2>/dev/null
  95 if ! verify "${TARGET}"; then
  96         echo "FAIL" >&2
  97         rc=1
  98 else
  99         echo "ok"
 100 fi
 101
 102 echo -n "Writing middle of sysctl after synchronized seek ... "
 103 set_test
 104 dd if="${TEST_FILE}" of="${TARGET}" bs=1 seek=1 skip=1 2>/dev/null
 105 if ! verify "${TARGET}"; then
 106         echo "FAIL" >&2
 107         rc=1
 108 else
 109         echo "ok"
 110 fi
 111
 112 echo -n "Writing beyond end of sysctl ... "
 113 set_orig
 114 dd if="${TEST_FILE}" of="${TARGET}" bs=20 seek=2 2>/dev/null
 115 if verify "${TARGET}"; then
 116         echo "FAIL" >&2
 117         rc=1
 118 else
 119         echo "ok"
 120 fi
 121
 122 echo -n "Writing sysctl with multiple long writes ... "
 123 set_orig
 124 (perl -e 'print "A" x 50;'; echo "${TEST_STR}") | \
 125         dd of="${TARGET}" bs=50 2>/dev/null
 126 if verify "${TARGET}"; then
 127         echo "FAIL" >&2
 128         rc=1
 129 else
 130         echo "ok"
 131 fi