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authorJosh Poimboeuf <jpoimboe@redhat.com>2015-01-27 13:10:04 -0500
committerSteven Rostedt <rostedt@goodmis.org>2015-01-27 17:44:57 -0500
commit988427829bcd230c78106d28dbfa85d45d182909 (patch)
tree9860c7341452a0adbad74bf6951f10712233d33d /arch/mips/kernel/vdso.c
parentb53486e08377506179e5da0abe8b960dba5c483a (diff)
ktest: Restore tty settings after closing console
When ktest runs the console program as a child process, the parent and child share the same tty for stdin and stderr. This is problematic when using a libvirt target. The "virsh console" program makes a lot of changes to the tty settings, making ktest's output hard to read (carriage returns don't work). After ktest exits, the terminal is unusable (CRs broken, stdin isn't echoed). I think the best way to fix this issue would be to create a pseudoterminal (pty pair) so the child process would have a dedicated tty, and then use pipes to connect the two ttys. I'm not sure if that's overkill, but it's far beyond my current Perl abilities. This patch is a much easier way to (partially) fix this issue. It saves the tty settings before opening the console and restores them after closing it. There are still a few places where ktest prints mangled output while the console is open, but the output is much more legible overall, and the terminal works just fine after ktest exits. Link: http://lkml.kernel.org/r/1bb89abc0025cf1d6da657c7ba58bbeb4381a515.1422382008.git.jpoimboe@redhat.com Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'arch/mips/kernel/vdso.c')
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