id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	launchpad_bug
1357	'tahoe mount' command	davidsarah		"ticket:1353#comment:1 suggested a {{{tahoe mount}}} command, which would mount a Tahoe directory at a local mount point.

{{{
tahoe mount [OPTIONS] [-o MOUNT_OPTION[,...]] TAHOE_PATH MOUNT_POINT
}}}

(As for all other CLI commands, TAHOE_PATH could be given relative to the default {{{tahoe:}}} alias, an explicit alias, or an explicit URI.)

I propose implementing this using SFTP+sshfs. The SFTP frontend would be changed to allow logging in with an arbitrary cap URI as root directory (#1356). Then the above mount command would be implemented by invoking {{{sshfs}}} with the {{{-o password_stdin}}} option, and passing the URI on stdin. This avoids exposing the URI via the command line. Because any aliases in {{{TAHOE_PATH}}} are resolved by {{{tahoe mount}}}, it also avoids ambient authority weaknesses, even when an attacker is not prevented from connecting to the SFTP server.

The host and port of the SFTP server would be obtained by determining the node directory as usual, and looking for a {{{tahoe.cfg}}} with an {{{[sftpd]port}}} setting in that directory. (It might be useful to allow specifying this in a separate {{{sftp.url}}} file analogous to {{{node.url}}}, I'm not sure.)
"	defect	new	major	1.9.0	code-frontend-cli	1.8.2		sftp tahoe-mount