🚀 go-pugleaf

In article <DEVEN.90Nov8180332@netserv2.rpi.edu> deven@rpi.edu (Deven T. Corzine) writes:
>
>On 7 Nov 90 18:52:24 GMT, gregg@cbnewsc.att.com (gregg.g.wonderly) said:
>
>gregg> The assignment of packet->dp_Arg1 = handle->fh_Args came from
>gregg> looking at the MSH handler.  I do not know what is really
>gregg> required here.
>
>According to the AmigaDOS Technical Reference Manual, (yes, it exists,
>but is very hard to read and understand) dp_Arg1 should be the BPTR to
>the file handle.  That is, that field should contain your return value
>from Open().
>Deven

This is when one of the ACTION_FINDwhatever packets is sent. The
dp_Arg1 field (i.e., the first argument of the PACKET) points to the
filehandle that you are supposed to fill in.  Further, the manual
claims that whatever is put into the fh_Arg1 (or fh_Args, whatever)
field of the FILEHANDLE, is passed as the first argument of the
ACTION_READ, -WRITE, -SEEK and -END packets.

What MSH does is that it puts a pointer to its own private kind of
filehandle in this field, since it usually does not need the AmigaDos
FileHandle in those functions. The SFS and FFS might use the address
of the FileHandle itself; I don't know or care.
--
Olaf 'Rhialto' Seibert                               rhialto@cs.kun.nl
How can you be so stupid if you're identical to me? -Robert Silverberg