A question about ARBIN

[ray]

I wish to use ⎕ARBIN to read from a "FIFO" (named pipe) on the Raspberry Pi.

Within the "Arbitrary Input" documentation, under "input" it states:

input
This is a simple numeric scalar that specifies the input device.

If it is positive or zero, it represents a file descriptor that must have been associated by the command that started Dyalog APL.
If it is negative, it represents the tie number of a file opened by ⎕NTIE or ⎕NCREATE.

Given a FIFO named "/home/pi/myfifo", how exactly would I associate it within the command line I use to start Dyalog APL?

[AndyS|Dyalog]

Hi Ray

Try

      ntn←'/home/pi/myfifo' ⎕ntie 0
⍬ ntn ⎕arbin''

[ray]

Hi Andy,

Thanks for your reply.

I am already using ⎕NTIE as in

Code: Select all

tie←fifo ⎕NTIE 0
....
((10+0 128)tie)⎕ARBIN ⍬


and this is now working well.

But I was more interested in the

If it is positive or zero, it represents a file descriptor that must have been associated by the command that started Dyalog APL

aspect, having never use a FIFO before and wanted to experiment.

Thanks anyway.