[Bug 200445] login into system on serial line /dev/cuaU0 hangs if login shell is /bin/sh
bugzilla-noreply at freebsd.org
bugzilla-noreply at freebsd.org
Mon May 25 19:08:21 UTC 2015
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200445
Bug ID: 200445
Summary: login into system on serial line /dev/cuaU0 hangs if
login shell is /bin/sh
Product: Base System
Version: 11.0-CURRENT
Hardware: i386
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: freebsd-bugs at FreeBSD.org
Reporter: guru at unixarea.de
what is not working:
- if I login as any other unpriv user (and I created a new one for this)
it hangs after presenting the /etc/motd file; it just hangs
login: valentin
Password: .....
Last login: ....
FreeBSD 11.0-CURRENT (GENERIC) #1 r276659M: Tue Apr 28 15:50:23 CEST 2015
Welcome to FreeBSD!
(hanging)
I figured out what is causing it: the type of the login shell; it works
with /bin/csh, it does not work with /bin/sh.
When it hangs, if you launch a truss on the hanging process /bin/sh
this process resumes normal operation and you can login.
I have two more observations on this:
- when it hangs in the login shell /bin/sh, a Ctrl-C on the terminal
cancels the hang and a new "login:" appears;
- regardless of the shell, if one starts the MUA 'mutt' (an alpha-mode
MUA) and below this a 'vim' to write the mail, on return from 'vim' to
'mutt' (the vim is already terminated as process) the 'mutt' hangs too
and on Ctrl-C it resumes normal operation;
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