Question

Is there utility in Solaris which can get realpath.

cd /home/me/test
realpath ..  # got /home/me in linux

I can do realpath in linux, but it seems lack on solaris.

Answer 1

function realpath {
  [ -d "$1" ] && (
      CDPATH= \cd "$1"
      /bin/pwd
  ) || (
      CDPATH= \cd "$(dirname "$1")" &&
          printf "%s/%s\n" "$(/bin/pwd)" "$(basename $1)"
  )
}

Some comments:

While function is non POSIX, it is recommended to use it instead of the legacy name() { ... } syntax at least on ksh which is probably the most used shell under Solaris.

\cd is used vs cd to prevent something else than the cd shell builtin to be used and then avoid unwanted side effects.
/bin/pwd is used to call pwd as a non builtin command because it has no idea about how the parent shell went to the current directory and so can only get the real path of it.