_existdir - UDM Built-in Variable

The _existdir built-in variable holds the results of the existdir command.

The _existdir variable is cleared when the command is executed; after execution, _existdir can contain either of four values:

• yes
  The directory exists.
• no
  Either the directory exists or the user does not have access rights.
• error
  An operating system or file error occurred while checking the file's existence.
• null character
  Initial state, directory existence has not been checked.

For example:

if $(_lastrc) EQ 0
    echo "The command ran correctly."
else
    echo "Check for error or warning messages."
end

echo ""
if <"$(_existdir)" EQ "yes">
    echo "The directory exists."
end

if <"$(_existdir)" EQ "no">
    echo "The directory does not exist."
end

if <"$(_existdir)" EQ "error">
    echo "A file or system error occurred."
end

if <"$(_existdir)" EQ "">
    echo "A command error occurred."
end