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 CURDIR()
 Return the current DOS directory
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 Syntax

     CURDIR([<cDrivespec>]) --> cDirectory

 Arguments

     <cDrivespec> specifies the letter of the disk drive to query.  If
     not specified, the default is the current DOS drive.

 Returns

     CURDIR() returns the current DOS directory of the drive specified by
     <cDrivespec> as a character string without either leading or trailing
     backslash (\) characters.

     If an error occurs, or the current directory of the specified drive is
     the root directory, CURDIR() returns a null string ("").

 Description

     CURDIR() is an environment function that gives you the name of the
     current DOS directory, ignoring the SET DEFAULT and SET PATH settings.

 Examples

     .  These examples illustrate various CURDIR() results:

        ? CURDIR("E:")     // Result: null string--root directory
        ? CURDIR("C")      // Result: CLIP53\SOURCE
        ? CURDIR("C:")     // Result: CLIP53\SOURCE
        ? CURDIR()         // Result: null string--root directory
        ? CURDIR("A")      // Result: null string--drive not ready

     .  This example changes the current DOS directory to a new value
        if it does not match a specified directory:

        IF CURDIR("C:") != "CLIP53\SOURCE"
           RUN CD \CLIP53\SOURCE
        ENDIF

 Files   Library is EXTEND.LIB, source file is SOURCE\SAMPLE\EXAMPLEA.ASM