sh/tests/builtins/cd4.0

   1 # $FreeBSD: head/bin/sh/tests/builtins/cd4.0 222154 2011-05-20 22:55:18Z jilles $
   2
   3 # This test assumes that whatever mechanism cd -P uses to determine the
   4 # pathname to the current directory if it is longer than PATH_MAX requires
   5 # read permission on all parent directories. It also works if this
   6 # requirement always applies.
   7
   8 set -e
   9 L=$(getconf PATH_MAX / 2>/dev/null) || L=4096
  10 [ "$L" -lt 100000 ] 2>/dev/null || L=4096
  11 L=$((L+100))
  12 T=$(mktemp -d ${TMPDIR:-/tmp}/sh-test.XXXXXX)
  13 trap 'chmod u+r ${T}; rm -rf ${T}' 0
  14 cd -Pe $T
  15 D=$(pwd)
  16 chmod u-r "$D"
  17 if [ -r "$D" ]; then
  18         # Running as root, cannot test.
  19         exit 0
  20 fi
  21 set +e
  22 while [ ${#D} -lt $L ]; do
  23         mkdir veryverylongdirectoryname || exit
  24         cd -Pe veryverylongdirectoryname 2>/dev/null
  25         r=$?
  26         [ $r -gt 1 ] && exit $r
  27         if [ $r -eq 1 ]; then
  28                 # Verify that the directory was changed correctly.
  29                 cd -Pe .. || exit
  30                 [ "$(pwd)" = "$D" ] || exit
  31                 # Verify that omitting -e results in success.
  32                 cd -P veryverylongdirectoryname 2>/dev/null || exit
  33                 exit 0
  34         fi
  35         D=$D/veryverylongdirectoryname
  36 done
  37 echo "cd -Pe never returned 1"
  38 exit 0