From John.Meister@intermec.com Thu Dec 12 16:52:37 2002
From: "Meister, John" <John.Meister@intermec.com>

HP-UX 11i - ksh 

   Conditional Expressions.
      A conditional expression is used with the [[ compound command to test
      attributes of files and to compare strings.  Field splitting and file
      name generation are not performed on the words between [[ and ]]. Each
      expression can be constructed from one or more of the following unary
      or binary expressions:

      string    True, if string is not null.

      -a file   Same is -e below.  This is obsolete.
      -b file   True, if file exists and is a block special file.
      -c file   True, if file exists and is a character special file.
      -d file   True, if file exists and is a directory.
      -e file   True, if file exists.
      -f file   True, if file exists and is an ordinary file.
      -g file   True, if file exists and is has its setgid bit set.
      -k file   True, if file exists and is has its sticky bit set.
      -n string True, if length of string is non-zero.
      -o option True, if option named option is on.
      -p file   True, if file exists and is a fifo special file or a pipe.
      -r file   True, if file exists and is readable by current process.
      -s file   True, if file exists and has size greater than zero.
      -t fildes True, if file descriptor number fildes is open and
                associated with a terminal device.
      -u file   True, if file exists and is has its setuid bit set.
      -w file   True, if file exists and is writable by current process.
      -x file   True, if file exists and is executable by current process.
                If file exists and is a directory, then true if the current
                process has permission to search in the directory.
      -z string True, if length of string is zero.
      -L file   True, if file exists and is a symbolic link.
      -O file   True, if file exists and is owned by the effective user id
                of this process.

                                   - 17 -      Formatted:  December 12, 2002
 ksh(user cmd)                                                 ksh(user cmd)