Support being used as a binfmt_misc handler. #54
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Unconditionally forward a range of ports to sockets named `$XDG_RUNTIME_DIR/krun/socket/port-$PORT`. This allows applications to dynamically bind to sockets at those paths and have them forwarded to the guest as vsock ports, after the krun VM is already running. The port range is currently hardcoded as 50000..50200. Signed-off-by: Asahi Lina <lina@asahilina.net> Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
After launching a process via the server, krun immediately closes and the
launched process' std{in,out,err} go nowhere. Add a --interactive flag that
allocates a pseudo-terminal, routes it to the host and connects to it.
Somewhat like '-it' in docker/podman exec.
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Aside from just being better UX, some commands are sensitive to it and will not work correctly without it. Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
This is always what you want if running via binfmt Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Launches the initial command via the server too. Server is set to linger for 10 seconds after last command finishes. Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Change the approach to environment variables to delete ones that are likely to cause problems instead of only passing through a pre-approved list. This will be neccessary to correctly work as a binfmt handler Fixes: AsahiLinux#52 Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Closes: AsahiLinux#24 Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
WhatAmISupposedToPutHere
requested review from
slp and
teohhanhui
as code owners
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This series allows krun to be used as a binfmt_misc handler: it uses interactive launch mode to make sure stdin/stdout are going where users expect, passes through the current working directory, expands the number of environment variables that are passed through, and daemonizes the vm process, so a process that waits on the first process launched via krun is not prevented from progressing by others.