kernel/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}" != "${TEST_STR}" ]; then
  22                 return 1
  23         fi
  24         return 0
  25 }
  26
  27 trap 'set_orig; rm -f "${TEST_FILE}"' EXIT
  28
  29 rc=0
  30
  31 echo -n "Writing test file ... "
  32 echo "${TEST_STR}" > "${TEST_FILE}"
  33 if ! verify "${TEST_FILE}"; then
  34         echo "FAIL" >&2
  35         exit 1
  36 else
  37         echo "ok"
  38 fi
  39
  40 echo -n "Checking sysctl is not set to test value ... "
  41 if verify "${TARGET}"; then
  42         echo "FAIL" >&2
  43         exit 1
  44 else
  45         echo "ok"
  46 fi
  47
  48 echo -n "Writing sysctl from shell ... "
  49 set_test
  50 if ! verify "${TARGET}"; then
  51         echo "FAIL" >&2
  52         exit 1
  53 else
  54         echo "ok"
  55 fi
  56
  57 echo -n "Resetting sysctl to original value ... "
  58 set_orig
  59 if verify "${TARGET}"; then
  60         echo "FAIL" >&2
  61         exit 1
  62 else
  63         echo "ok"
  64 fi
  65
  66 # Now that we've validated the sanity of "set_test" and "set_orig",
  67 # we can use those functions to set starting states before running
  68 # specific behavioral tests.
  69
  70 echo -n "Writing entire sysctl in single write ... "
  71 set_orig
  72 dd if="${TEST_FILE}" of="${TARGET}" bs=4096 2>/dev/null
  73 if ! verify "${TARGET}"; then
  74         echo "FAIL" >&2
  75         rc=1
  76 else
  77         echo "ok"
  78 fi
  79
  80 echo -n "Writing middle of sysctl after synchronized seek ... "
  81 set_test
  82 dd if="${TEST_FILE}" of="${TARGET}" bs=1 seek=1 skip=1 2>/dev/null
  83 if ! verify "${TARGET}"; then
  84         echo "FAIL" >&2
  85         rc=1
  86 else
  87         echo "ok"
  88 fi
  89
  90 echo -n "Writing beyond end of sysctl ... "
  91 set_orig
  92 dd if="${TEST_FILE}" of="${TARGET}" bs=20 seek=2 2>/dev/null
  93 if verify "${TARGET}"; then
  94         echo "FAIL" >&2
  95         rc=1
  96 else
  97         echo "ok"
  98 fi
  99
 100 echo -n "Writing sysctl with multiple long writes ... "
 101 set_orig
 102 (perl -e 'print "A" x 50;'; echo "${TEST_STR}") | \
 103         dd of="${TARGET}" bs=50 2>/dev/null
 104 if verify "${TARGET}"; then
 105         echo "FAIL" >&2
 106         rc=1
 107 else
 108         echo "ok"
 109 fi