Date: Wed, 27 May 2015 08:01:13 +0200 From: Matthias Apitz <guru@unixarea.de> To: freebsd-current@freebsd.org Subject: after login through serial line, open(2) on /dev/tty hangs Message-ID: <20150527060113.GA2166@c720-r276659>
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Hello, I'm preparing something for an exposition on some Vintage Computer Event and connected an old original VT102 to my netbook running CURRENT. See here: http://www.unixarea.de/freebsd-vt102.jpg The system is r276659 on i386. The VT102 is connected through an USB-serial adapter and getty spawns nicely login: to /dev/cuaU0. Login works as well, but only with /bin/csh as login-shell, not with /bin/sh. After some digging, I figured out that the real problem is the hanging open(2) syscall on /dev/tty: no proc can't open this file after login through /dev/cuaU0.. More details in the issue in bugzilla: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200445 What part of the kernel should I instrument with more debugging log to get light into this problem? Any other ideas? Thanks matthias -- Matthias Apitz, guru@unixarea.de, http://www.unixarea.de/ +49-170-4527211 +49-176-38902045 "Wenn der Mensch von den Umständen gebildet wird, so muß man die Umstände menschlich bilden." "Si el hombre es formado por las circunstancias entonces es necesario formar humanamente las circunstancias", Karl Marx in Die heilige Familie / La sagrada familia (MEW 2, 138)
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