shithub: riscv

ref: 7367b8d2e75301fb33830404b66ded43bbd56356
dir: /sys/man/4/tftpfs/

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.TH TFTPFS 4
.SH NAME
tftpfs \- trivial file transfer protocol (TFTP) file system
.SH SYNOPSIS
.B ip/tftpfs
[
.B -D
] [
.B -s
.I srvname
] [
.B -m
.I mtpt
] [
.B -x
.I net
] [
.I ipaddr
]
.SH DESCRIPTION
.I Tftpfs
serves files from a TFTP server as a filesystem. TFTP
is mostly used by bootloaders to download kernel images for
network bootstrap (see
.IR dhcpd (8)).
As the protocol has no way of distinguishing files from
directories, the final path segment needs to conain a dot
(.) character to be recognized as a file. To access files that
have no dot in the filename, a trailing dot has to be added
and will be stripped before it is passed to the server.
.PP
The
.B -D
option enables 9P debugging messages.
.PP
The
.B -s
option causes 
.I tftpfs
to post the 9P service as
.BI /srv/ srvname
and disables the default mount.
.PP
The default mountpoint
.BR /n/tftp
can be changed with the
.B -B
.I mtpt
option.
.PP
The
.B -x
option specifies an alternate network directory
.RI ( e.g., 
.BR /net.alt ).
.PP
The ip address of the server can be passed in
as the last program argument,
.I ipaddr,
 or in the mount spec (see
.IR bind (1))
on a per mount basis.
.SH EXAMPLE
Boot a kernel from a tftp server (note the final
dot in the kernel path).
.IP
.EX
ip/tftpfs 10.192.254.53
echo reboot /n/tftp/386/9pc. >/dev/reboot
.EE
.SH SOURCE
.B /sys/src/cmd/ip/tftpfs.c
.SH "SEE ALSO"
.IR dhcpd (8).