Hi,
I'm confused about the directory function both in its usage and
documentation.
The documentation reads:
Returns the current directory, changing it to *newdirectory* if an argument
> is supplied and the named directory exists. If *newdirectory* is not
> specified, the name of the current directory is returned. Otherwise, an
> attempt is made to change to the specified *newdirectory*. If successful,
> the name of the *newdirectory* is returned; if an error occurred, null is
> returned.
>
The opening sentence looks to be clear. The directory function will:
1. Obtain the current directory and
2. Change to a new directory (assuming it exist).
The second sentence is also clear. If you don't include an argument,
you'll get the name of the current directory and no attempt to change to a
new directory will occur.
What I don't understand are the last two sentences and how they relate to
the first two sentences. They seem in conflict.
"Otherwise" OK, otherwise to not having an argument (e.g. new directory),
sure, it is what occurs in the opening sentence IF the directory exists.
*All right, instead of analyzing the documentation maybe a simpler way to
ask/say all this is:*
*HOW DO I GET THE DIRECTORY FUNCTION TO OPERATE AS DESCRIBED IN THE OPENING
SENTENCE? The given is the directory specified by newdirectory does
exists.*
Basically what I would like is to code:
Current_Directory = directory(New_Directory)
and when New_Directory exists I get the Current Directory, if the New
Directory doesn't exists I get null.
It is how I read the opening sentence to the Directory function.
What I am seeing though, is either the new directory or null and never the
current directory, as described in the opening sentence.
What am I trying to do is write a very simple function to:
1. State (like FSSTATE in CMS) the existence of a directory (new
directory).
2. If it exists, cool, return and depending upon arguments leave the
directory as either the new directory or the caller's current directory.
3. If it does not exist, then make the new directory, return, and like
#2 leave the directory per arguments.
*Yes, I can code based upon the behavior I'm seeing, but I'd like to
understand how to get Rexx to behave as described in the opening sentence,
PLEASE and Thank You.*
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