[gambit-list] open-input-file, read and fifos
Adrien Pierard
pierarda at iro.umontreal.ca
Fri Feb 1 06:33:19 EST 2008
First question is "how comes reading a fifo isn't blocking?"
% cd /tmp
% mkfifo fifo
% cat > test.scm
(let ((fifo-port (open-input-file "/tmp/fifo")))
(pretty-print (read fifo-port))
(close-port fifo-port))
% gsi test.scm
#!eof
% echo "hello" > fifo&
[1] 70455
% gsi test.scm
[1] + done echo "hello" > fifo
hello
Second question is "Why do I often have a 'device not configured' error
with code like the one above?" (Bug not reproduced here, but often happens
when I try to read or open where nothing is currently being written yet.)
Finally, I would like to know whether we could have a procedure
WITH-ERROR-TO-FILE to redirect the error port too.
Regards,
Adrien
--
"I am not a Church numeral; I am a free variable!"
(The Scheme Underground)
For every complex problem, there is a solution that is simple, neat, and wrong.
More information about the Gambit-list
mailing list