Processed: Re: Bug#829591: hurd: pseudoterminal hangs when I press ^O (flush)
Processing control commands: > retitle -1 term should clear discard-output flag in more situations Bug #829591 [hurd] hurd: should clear discard-output flag when pseudoterminal is destroyed Changed Bug title to 'term should clear discard-output flag in more situations' from 'hurd: should clear discard-output flag when pseudoterminal is destroyed'. -- 829591: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=829591 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems
Bug#829591: hurd: pseudoterminal hangs when I press ^O (flush)
Control: retitle -1 term should clear discard-output flag in more situations Although the FreeBSD manual page for termios(4) https://www.freebsd.org/cgi/man.cgi?query=termios=0=4=FreeBSD+10.3-RELEASE+and+Ports=default=html documents the DISCARD key, the kernel doesn't appear to implement it: https://svnweb.freebsd.org/base/stable/10/sys/kern/tty_ttydisc.c?revision=256281=markup#l897 There, the ttydisc_rint function recognizes VLNEXT but not VDISCARD. In contrast, NetBSD implements DISCARD: http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/kern/tty.c?rev=1.271=text/x-cvsweb-markup_with_tag=MAIN There, the ttyinput_wlock function recognizes VDISCARD and toggles the FLUSHO flag. This flag is also cleared in several more places: * At the end of ttyinput_wlock, except in these cases: - a break, parity error, or a framing error was ignored - the DISCARD or STOP character was just received - output remains suspended with STOP. * In the ttioctl function, if the TIOCSTART ioctl is used. * In the ttioctl function, if the TIOCSETA, TIOCSETAW, or TIOCSETAF ioctl is used. It actually copies the flag from the FLUSHO bit of termios::c_lflag. * In the ttyrub function, if the ECHO flag is set and the EXTPROC flag is not set. This function is called when a previously typed character needs to be deleted. * In the ttyecho function, unless it's being called because the user pressed the TAB key. The term translator should thus be changed: * Clear the discard-output flag when the user types almost any other character, like the glibc documentation said. * Clear the discard-output flag when TIOCSTART is used. This is term/users.c (S_tioctl_tiocstart), I believe. * Copy the discard-output flag from the FLUSHO bit of termios::c_lflag, when TIOCSETA, TIOCSETAW, or TIOCSETAF is used. This is term/users.c (set_state), I believe. The GNU C Library already defines FLUSHO in both and . With those changes, I think my previous open_hook patch would no longer be necessary because sshd would call tcsetattr without FLUSHO and thereby clear the flag.
Bug#829591: hurd: pseudoterminal hangs when I press ^O (flush)
Hello, Kalle Olavi Niemitalo, on Thu 07 Jul 2016 23:32:19 +0300, wrote: > I patched term/users.c (open_hook) so it clears the FLUSH_OUTPUT > flag if the tty was not already open. There again, such few-lines change is not copyrightable, and thus doesn't need copyright assignment. Samuel
Bug#829591: hurd: pseudoterminal hangs when I press ^O (flush)
I patched term/users.c (open_hook) so it clears the FLUSH_OUTPUT flag if the tty was not already open. I built hurd from commit bc170131016969f1d79409337833046ae1f4501b (2016-06-14 "pfinet: fix memory leak") + the following changes: * debian/patches/exec_filename_*.patch from the Debian hurd 1:0.8.git20160522-4 sources, for https://savannah.gnu.org/bugs/?28934 * term/users.c change described above * trans/streamio.c change for https://savannah.gnu.org/bugs/?48371 * libpipe/pipe.c change for https://savannah.gnu.org/bugs/?48372 I installed /hurd/exec, /hurd/exec.static, /hurd/ext2fs, /hurd/ext2fs.static, /hurd/fifo, /hurd/new-fifo, /hurd/pflocal, /hurd/streamio, /hurd/term, /lib/i386-gnu/libpipe.a, and /lib/i386-gnu/libpipe.so.0.3. Then rebooted. To test the change, I connected to the Hurd VM via SSH and got /dev/ttyp0. Then ran cat, typed abc, pressed ^O, typed def (which did not appear), killed the ssh client, and connected again. The motd and the shell prompt appeared OK, and the tty command showed that this was /dev/ttyp0 again. I also built vim-7.4.1829 and ran its test suite, which passed.
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Still Failing: g-i-installation_debian_sid_daily_hurd_lxde/189
See https://jenkins.debian.net/job/g-i-installation_debian_sid_daily_hurd_lxde/189/ and https://jenkins.debian.net/job/g-i-installation_debian_sid_daily_hurd_lxde/189//console and https://jenkins.debian.net/job/g-i-installation_debian_sid_daily_hurd_lxde/189//artifact/results/ if there are any.
