41 lines
980 B
Plaintext
41 lines
980 B
Plaintext
.TH STREAM 3
|
|
.SH NAME
|
|
stream \- fast sequential file access
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.B bind #¶ /fd
|
|
|
|
.B /fd/0stream
|
|
.B /fd/1stream
|
|
\&...
|
|
.fi
|
|
.SH DESCRIPTION
|
|
The
|
|
.I stream
|
|
device serves a one-level directory containing files of the form
|
|
.IR N stream
|
|
where
|
|
.I N
|
|
is a file descriptor of the current process.
|
|
.PP
|
|
An
|
|
.IR open (2)
|
|
returns a stream file descriptor connected to the original file
|
|
refered to by the file descriptor
|
|
.IR N .
|
|
When a stream was opend for reading, the device will start
|
|
continuously reading the file in the background until it reaches
|
|
the end of the file. A
|
|
.IR read (2)
|
|
on the stream consumes the prefetched data in sequential order.
|
|
.PP
|
|
When a stream is opend for writing, writes to the stream will
|
|
return immidiately without waiting for the data to be written
|
|
to the file. A zero-length write can be used to wait for the
|
|
buffered data to drain and return any previous write errors.
|
|
.SH SEE ALSO
|
|
.IR dup (3),
|
|
.IR pipe (3)
|
|
.SH SOURCE
|
|
.B /sys/src/9/port/devstream.c
|