[FFmpeg-devel] [PATCHv2] ffmpeg: modify tty state when stderr is redirected
gajjanag at mit.edu
Mon Oct 12 14:39:53 CEST 2015
On Mon, Oct 12, 2015 at 8:24 AM, wm4 <nfxjfg at googlemail.com> wrote:
> On Mon, 12 Oct 2015 08:14:14 -0400
> Ganesh Ajjanagadde <gajjanag at mit.edu> wrote:
>> On Mon, Oct 12, 2015 at 8:03 AM, Michael Niedermayer
>> <michael at niedermayer.cc> wrote:
>> > On Mon, Oct 12, 2015 at 01:46:19PM +0200, Michael Niedermayer wrote:
>> >> On Fri, Jul 31, 2015 at 01:48:18PM +0200, Nicolas George wrote:
>> >> [...]
>> >> > -> "ttyctl -f" in ~/.zshrc, "bash_tty_mode=$(stty -g);
>> >> > PROMPT_COMMAND='stty $bash_tty_mode'" in ~/.bashrc; that can be added in
>> >> > the FAQ or the wiki.
>> >> the patch was applied and this does not work
>> >> the first segfault i see breaks the terminal
>> >> a testcase is a script like:
>> >> #!/bin/sh
>> >> valgrind ./ffmpeg_g -i matrixbench_mpeg2.mpg -encryption_key 0123456789abcdef0011223344556677 -encryption_iv aabbccddeeff11335577999876542222 crypto:file-crypt.nut
>> >> (with the aesni patches or anything else that causes a segfault)
>> >> ls -alF /bin/sh
>> >> lrwxrwxrwx 1 root root 4 Mar 29 2012 /bin/sh -> dash*
>> >> (this is default on ubuntu)
>> > i think i got it working as long as bash is the users shell with
>> > the suggested stty commands
>> So it does not work with dash?
> dash isn't meant to be used interactively anyway?
Good point, just now read up on this weird shell I have never heard
of: https://en.wikipedia.org/wiki/Debian_Almquist_shell. However,
Michael does bring up a point in that /bin/sh by default symlinks to
dash on a rather large platform, namely Ubuntu. We need to find out a
workaround for it. I am of no use here; hopefully Michael finds
something and posts.
I will then collect them all and add to the wiki.
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