@database cli_dtc.doc
@master doc/cli_dtc.doc
@node main "cli_dtc.doc"
@toc xref.library_xreffile@main
@{settabs 40}@{" cli.datatype " link "cli.datatype"}	
@endnode
@node "cli.datatype" "cli.datatype/cli.datatype"
    @{b}NAME@{ub}
        cli.datatype - data type for launching extern programs and
            displaying the command's standard output
    @{b}FUNCTION@{ub}
        This datatype launches an extern command and displays the standard
        output of that command. This is useful to view the contents of a
        archive like lha or tar archives without writing a complete datatype.
        The standard output is placed in a tempory file in "T:", because the
        datatypes.library can't handle pipes. From V39.2 the cli.datatype
        uses NewDTObject() for the tempory file. So it's possible to display
        files, which have special datatypes (e.g. Unix-Manual-Pages).
    @{b}PREFS@{ub}
        The cli datatype is configured by a preference file "cli.prefs" in
        "PROGDIR:Prefs/Datatypes/" or "Env:Datatypes/".
        The file is parsed using @{"ReadArgs()" link "dos/ReadArgs()"} with the following template :
        "@{"DATATYPE" link "AG:SysInc/datatypes/datatypes.h/main" 174}/A,STACK/N/K,SUFFIX/K,COMMAND/F/K/A"
        @{"DATATYPE" link "AG:SysInc/datatypes/datatypes.h/main" 174} - specifies the datatype
        STACK    - size of stack to use for the command
        SUFFIX   - suffix to use for tempory file, thus the datatypes.library
            can determine the type of the file (e.g: ".0" for Man-Datatype)
        COMMAND  - specifies the command to launch for that datatype, a "%s"
            in the command string is replaced by the real filename.
    @{b}EXAMPLE@{ub}
        ; cli.datatype preference file
        Lha                         COMMAND=lha v %s
        Tar                         COMMAND=tar tvf %s
        NRoff STACK=50000 SUFFIX=.0 COMMAND=bin:groff -man -Tascii %s
    @{b}METHODS@{ub}
        @{"OM_NEW" link "AG:SysInc/intuition/classusr.h/main" 63} - create a new object and launch the extern command
        @{"OM_DISPOSE" link "AG:SysInc/intuition/classusr.h/main" 64} - delete the object
    @{b}TAGS@{ub}
        none
    @{b}NOTE@{ub}
        With the used method of creating and handling of tempory output, it's
        also possible to create a special datatype for crunshed files through
        PowerPacker or XPK. All what have to be done is to create a tempory
        file and then call NewDTObject() on that. The source of the
        cli.datatype gives a the skeleton for such datatypes. Please feel
        free
        to implement XPK or PowerPacker datatypes. I don't do this.
    @{b}SEE ALSO@{ub}
        text.datatype, @{"ascii.datatype" link "ascii_dtc/ascii.datatype"}, datatypes.library
@endnode