A quick & dirty port of Gerhard Mueller's bla-handler program
(http://aminet.net/package/util/cli/BlaDevice10).

Installation:

1. copy bla-handler to L:
2. copy BLA to DEVS:DOSDrivers or SYS:Storage/DOSDrivers

If you copied the BLA file to Storage then you will have to mount the device
manually by entering "mount bla:" on the command line.

--- original readme ---

   NAME
     BlaDevice - small device that simulates the output of a file
                 as a file


   SYNOPSIS
     "Bla:<CLI-command with parameters>"


   DESCRIPTION
     BlaDevice is a small device that simulates the output of a program
     as a true file.

     Examples:

          type "bla:dir ram:"

          sort "bla: list ram: dirs lformat %N" to ram:y


     If you want to use arguements with '"', you can use *", e.g.:

          sort "bla:list ram: dirs lformat *"(DIR) %N*"" to ram:y


     Bla-device executes the given command asyncronly with the
     given parameters. The output of the command is linked to
     PIPE:<unique name>. This file is used to satisfy the read
     commands of the program that uses BLA:.

     If the using command closes the file before all data is read,
     BLA reads as much as it can read before it closeses the
     PIPE:<unique name> file.

     The following AmigaDos packets are supported:

        ACTION_FINDOUTPUT
        ACTION_FINDUPDATE
        ACTION_READ
        ACTION_END
        ACTION_DIE

   USAGE

     "Bla:<CLI-command with parameters>"


   BUGS
     none known (yet)


   VERSION
     1.0 - initial release


   COPYRIGHT
     BLA-device is full PD. You can do with it what you want. Bla
     device is "as is", THERE IS NO WARRANTY AT ALL. etc. etc.


   BACKGROUND
     BLA device was written mainly because the Amiga shell has no
     real piping. With BLA a lot of tempory files can be made
     obsolete, and the length of the temporary file is not limited.


   AUTHOR
     Gerhard Müller (internet: muellerginformatik.tu-muenchen.de
                     Fido    : Gerhard Mueller  2:2480/3508.38
                     Z-Netz  : GANDALFAMC.ZER)

     Klarweinstr. 32
     81247 München

     GERMANY

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                  218     297  73.4% -lh5- d58e Dec 15 23:03 bla-os4/BLA
[generic]                 2382    5788  41.2% -lh5- 1090 Dec 15 22:54 bla-os4/bla-handler.c
[generic]                  867    1790  48.4% -lh5- d8bc Apr 18  1994 bla-os4/Bla.doc
[generic]                 7027    8649  81.2% -lh5- 7990 Dec 15 23:02 bla-os4/BLA.info
[generic]                  449     865  51.9% -lh5- b86a Dec 15 23:10 bla-os4/Makefile
[generic]                  225     320  70.3% -lh5- 0853 Dec  3 21:52 bla-os4/MountList.BLA
[generic]                  311     475  65.5% -lh5- 5728 Dec 15 23:07 bla-os4/README.OS4
[generic]                 1900    4744  40.1% -lh5- 5bab Dec 15 23:15 bla-os4/bla-handler
[generic]                  116     205  56.6% -lh5- 931d Dec 15 23:15 bla-os4/bla-handler_rev.h
[generic]                  128     251  51.0% -lh5- 8439 Dec 15 23:15 bla-os4/bla-handler_rev.i
[generic]                    2       2 100.0% -lh0- 9795 Dec 15 23:15 bla-os4/bla-handler_rev.rev
[generic]                  133     264  50.4% -lh5- 372f Dec 15 23:15 bla-os4/bla-handler_rev.s
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        12 files   13758   23650  58.2%            Dec 16 00:23