ref: 41e27b2d10c6a60c49931332e8677438736a1e36
dir: /man/2/tftp/
.TH TFTP 2
.SH NAME
tftp \- Trivial File Transfer Protocol
.SH SYNOPSIS
.EX
tftp := load Tftp Tftp->PATH;
Tftp: module
{
init: fn(progress: int);
receive: fn(host: string, filename: string,
fd: ref Sys->FD): string;
};
.EE
.SH DESCRIPTION
.B Tftp
fetches files from an Internet TFTP server.
It is typically used only to fetch kernels or configuration files when booting.
Only one transfer can be active at any given time.
.PP
.B Init
must be called once before using any other function of the module.
If
.I progress
is non-zero,
.B receive
will periodically print a character as blocks are received:
.RB ` . '
for every 25 blocks,
.RB ` S '
for a sequence error,
.RB ` T '
for a timeout.
.PP
.B Receive
attempts to fetch the contents of
.I filename
from
.I host
and writes the blocks of data to
.I fd
as they are received.
It returns when the file transfer has completed,
returning a nil string on success or a diagnostic string otherwise.
When booting,
.I fd
is typically open on the
.B kexec
file of
.IR boot (3).
.SH SOURCE
.B /appl/lib/tftp.b
.SH SEE ALSO
.IR ip (2),
.IR bootpd (8)