> On Jun 11, 2018, at 7:35 AM, iry <i...@riseup.net> wrote: > > Dear Tor developers, > > I met a problem when trying to use the snowflake-client binary > extracted from TBB 8.0a8 with the system Tor. > > Specifically, it seems snowflake-client cannot be run by debian-tor > user, regardless of the permissions it is given. > > I am posting the full steps below. A better formatted version of it > can be found here: > http://forums.whonix.org/t/replacing-meek-snowflake/5190/18 > > > Here is the original permission and ownership of snowflake-client: > > > > user@host:~$ ls -l snowflake-client -rwx------ 1 user user 14160744 > > Jun 4 06:17 snowflake-client > > > > It can be executed by user user: > > > > user@host:~$ sudo -u user ./snowflake-client 2018/06/04 06:18:21 > > > > > > --- Starting Snowflake Client --- 2018/06/04 06:18:21 No HTTP > > signaling detected. Using manual copy-paste signaling. 2018/06/04 > > 06:18:21 Waiting for a "signal" pipe... ^C > > > > We now change the permission to let it executable by user > > debian-tor: > > > > user@host:~$ sudo chmod 777 snowflake-client > > > > > > user@host:~$ sudo -u debian-tor ./snowflake-client 2018/06/04 > > 06:18:43 > > > > Noticed the permission denied: > > > > --- Starting Snowflake Client --- 2018/06/04 06:18:43 No HTTP > > signaling detected. Using manual copy-paste signaling. 2018/06/04 > > 06:18:43 Waiting for a "signal" pipe... 2018/06/04 06:18:43 open > > signal: permission denied > > > > We now change its ownership to debian-tor:debian-tor: > > > > user@host:~$ sudo chown debian-tor:debian-tor snowflake-client > > user@host:~$ ls -l snowflake-client -rwxrwxrwx 1 debian-tor > > debian-tor 14160744 Jun 4 06:17 snowflake-client > > > > Still, permission denied: > > > > user@host:~$ sudo -u debian-tor ./snowflake-client 2018/06/04 > > 06:19:15 > > > > > > --- Starting Snowflake Client --- 2018/06/04 06:19:15 No HTTP > > signaling detected. Using manual copy-paste signaling. 2018/06/04 > > 06:19:15 Waiting for a "signal" pipe... 2018/06/04 06:19:15 open > > signal: permission denied > > > > However, when executing it by user, it works fine: > > > > user@host:~$ sudo -u user ./snowflake-client 2018/06/04 06:19:22 > > > > > > --- Starting Snowflake Client --- 2018/06/04 06:19:22 No HTTP > > signaling detected. Using manual copy-paste signaling. 2018/06/04 > > 06:19:22 Waiting for a "signal" pipe... ^C > > I didn't find any special requirement for the user who runs > snowflake-client from the documentation, so it would be extremely > helpful and appreciated if you could share some insights on this > problem. :)
When you launch the client binary without providing a broker url it tries to create a named pipe (mkfifo) to do signalling. https://gitweb.torproject.org/pluggable-transports/snowflake.git/tree/client/rendezvous.go#n161 Try providing a -url as in, https://gitweb.torproject.org/pluggable-transports/snowflake.git/tree/client/torrc > Best Regards, > iry > _______________________________________________ > tor-dev mailing list > tor-dev@lists.torproject.org > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev _______________________________________________ tor-dev mailing list tor-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
