[systemd-devel] nspawn: No Return key in machinectl login?

[Lennart Poettering]

On Tue, 26.05.15 21:40, Tobias Hunger (tobias.hunger at gmail.com) wrote:

> This is stty -a from outside the container:
> 
> speed 38400 baud; rows 46; columns 114; line = 0;
> intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = M-^?;
> eol2 = M-^?; swtch = <undef>; start = ^Q;
> stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O;
> min = 1; time = 0;
> -parenb -parodd -cmspar cs8 -hupcl -cstopb cread -clocal -crtscts
> -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl
> -ixon -ixoff -iuclc ixany imaxbel -iutf8
> opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
> isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop
> -echoprt echoctl echoke
> 
> This is stty -a inside the nspawn-container:
> 
> speed 38400 baud; rows 46; columns 114; line = 0;
> intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
> eol2 = <undef>; swtch = <undef>; start = ^Q;
> stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; flush = ^O;
> min = 1; time = 0;
> -parenb -parodd -cmspar cs8 hupcl -cstopb cread -clocal -crtscts
> -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl
> -ixon -ixoff -iuclc -ixany -imaxbel iutf8
> opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
> isig icanon -iexten echo echoe echok -echonl -noflsh -xcase -tostop
> -echoprt -echoctl echoke
> 
> The difference is:
> eol, eol2, -icrnl -ixany -imaxbel iutf8 -iexten -echoctl

Sorry for the late reply...

Hmm, I think the most interesting info would actually be to see stty
-a from a working instance, and from a non-working
instance. I.e. start the container, log into it, type "stty -a" command when
everything works, and when it doesn't, and let me know the diff of it.

Also, right after doing the "stty -a" in the container, please run the
same commands on the host, in a seperate xterm, but connect to the
host side container tty using "stty -a -F /dev/pts/xyz", where
/dev/pts/xyz is the pts that nspawn itself is running on.

Or to explain it in more steps:

a) open an xterm of some form

b) type "tty" into it, and remember the pty name it responds. It
   should be something like "/dev/pts/xyz".

c) now run systemd-nspawn inside the xterm, and login there, then type
   "stty -a" in it, and save the output that command generated
   somewhere.

d) now, leave everything as it is now, open a second xterm. In it run
   "stty -a -F /dev/pts/xyz", replacing "/dev/pts/xyz" with the pty
   name from step b) and save the output somwhere.

Then, close both xterms. Do these steps once for a container where
things work, and once for a container where things are borked. Then
let me know the diffs between the working and non-working outputs from
both runs of c), as we as the diffs between the working and
non-working outputs from both runs of d).

Make sure you take the stty snapshots at the exact same states each
time, because shells and so on tend to toggle some bits of it
depending on whether they are in the fg or not...

Also, it would be good, to check if different xterm implementations
(gnome, kde, original xterm) behave differently.

Lennart

-- 
Lennart Poettering, Red Hat