ENVIRO.ACC    &    AUTOENVR.PRG (*)

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       Freeware by Pascal Fellerich

       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~







PURPOSE:

  Use it to set the environment strings

WHY?

  Environment strings are used to transfer some information to other 
programs. The desktop, the original COMMAND.PRG by Atari and the 
RSRC_LOAD function use these strings. The standard string is: 
'PATH=;C:\' if you use a harddisk. Now, if you launch a program from 
an inactive window, it won't find it's RSC-file. If you had set the 
environment variable 'PATH=' to the right path, this would not have 
happened.

An example: all your utility programs are in as folder called 
'UTILITY', and most of your RSC-files are in a folder called 'RSC' - 
and now you set the environment the following way:



            PATH=;E:\UTILITY\;E:\RSC\;C:\



Now if you launch a program or try to find a resource file, the OS 
will use the paths specified after 'PATH='.



Another feature:

TOS has some functions to read and set the path for a 
clipboard-directory. Nowadays, there are some programs that use this 
feature (e.g. the GEMINI-shell). Simply type



            SCRAPDIR=X:\your\scrap_dir



and ENVIRO.ACC will set this path using the AES-function SCRP_WRITE()





IMPORTANT:

  The first variable must be 'PATH=;' - don't change it to avoid 
problems...





AUTOENVR.PRG:

  must be in the AUTO-folder as this program installs a special 
buffer for the AES-environment.



ENVIRO.ACC:

  Allows you to modify the current environment strings and sets the 
clipboard-path according to the environment variable 'SCRAPDIR='. 
This ACC runs also as a program, you only have to rename it.

* NOTE *: if you want only the scrapdir being set, you do not need 
ENVIRO.ACC if you use the DESKTOP-BUTLER JAMES v1.5c or higher.



DESKTOP.ENV:

  AutoEnvr searches in the root directory for a file called 
'DESKTOP.ENV'. If not available, then he OS-default will be used.





Technical Notes:

----------------

* AUTOENVR needs an entry in the 'cookie jar' of the OS. If there's 
already a cookie jar (TOS 1.6, POOLFIX 3&4 etc...) my program uses 
it; if there's none, it creates one. (logical, isn't it?)

My entry is 'ENVR', and the value is a pointer to a longword-array 
containing pointers and some other data.



DOC for programmers:

--------------------

The Cookie:

Entry:      ENVR

Data:       Pointer to LW-array



Array:      ARR[0] = Pointer to the AES-Environment-Buffer

            ARR[1] = Length of the buffer

            ARR[2] = Pointer to E_INFO - function

            ARR[3] =    "     " E_SFIRST     "

            ARR[4] =    "     " E_SNEXT      "



Functions:

----------

  The functions are called like a normal C-routine. They return 
something in register d0.



  1. E_INFO:

        C-Declaration:  long e_info()

     CALL:

        C:    version=e_info();

        GFA:  version%=C:e_info%()

     RETURN-VALUE:

        version: upper word: Release, lower word: rev.



  2. E_SFIRST:

        C-Declaration:  long e_sfirst(pattern)

                                char *pattern;

     CALL:

        C:    found=e_sfirst(pattern);

        GFA:  found%=C:e_sfirst(L:V:pattern$)

     RETURN-VALUE:

        pattern: nukll terminated string containing the

        search-pattern.

        found:   -1.L (failure) or pointer to matching string.



  3. E_SNEXT:

        C-Declaration:  long e_snext()

     CALL:

        C:    found=e_sfirst();

        GFA:  found%=C:e_sfirst()

     RETURN-VALUE:

        found:   -1.L (failure) or pointer to matching string.



  The search-string (pattern strin) must not exceed 20 chars. But it 
can be sa complicated as you want. There are two wildcards: '*' and 
'?'; they are used in exactly the same way as in TOS. An pattern 
string like ?*MS?D*?*O**S?* is valid! (Would return for example

          COMSPEC=D:\TOS\XYZ.PRG

            ^^    ^   ^^    



  Their further use is like the GEMDOS FSFIRST and FSNEXT functions.



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