noble (1) qrap.1.gz

NAME

       qrap - temporary qemu wrapper connecting UNIX domain socket to file descriptor

SYNOPSIS

       qrap [FDNUM QEMU_CMD] [QEMU_ARG]...

DESCRIPTION

       qrap  is  a  wrapper, designed specifically for usage with qemu(1) and passt(1), connecting a UNIX domain
       socket to a file descriptor, and running qemu(1) with given arguments.

       A running instance of passt(1) is probed checking for UNIX domain sockets, answering a dummy ARP request,
       with names starting from /tmp/passt_1.socket up to /tmp/passt_64.socket.

       If  first  and  second  arguments are not a socket number and a command, that is, respectively, FDNUM and
       QEMU_CMD, qrap will try to locate a qemu executable in PATH and patch  the  command  line  to  specify  a
       network device and a netdev back-end for usage with passt(1).

       If qrap patches the command line, it will remove any potentially conflicting network device, that is, any
       -netdev or -net option, or any -device option with argument starting  with  virtio-net-pci,,  virtio-net-
       ccw,, e1000,, e1000e,, or rtl8139,.

EXAMPLES

       Start qemu explicitly passing its command name and a socket number
              $ ./qrap 5 kvm test.qcow2 -m 1024 -display none -nodefaults -nographic -net socket,fd=5 -net nic,model=virtio

       Start qemu without command name and socket number, patching arguments
              $ ./qrap test.qcow2 -m 1024 -display none -nodefaults -nographic

NOTES

       This  wrapper  is  temporary: qemu commit 13c6be96618c ("net: stream: add unix socket") introduces native
       AF_UNIX socket support, and it should be included in qemu starting from  the  7.2  release.  It  will  be
       around for a little bit longer to give users enough time to switch.

AUTHOR

       Stefano Brivio <sbrivio@redhat.com>

REPORTING BUGS

       No  public  bug  tracker is available at this time. For the moment being, report issues to Stefano Brivio
       <sbrivio@redhat.com>.

COPYRIGHT

       Copyright (c) 2020-2021 Red Hat GmbH.

       qrap is free software: you can redistribute is and/or modify it under the terms of the GNU Affero General
       Public License as published by the Free Software Foundation, either version 3 of the License, or (at your
       option) any later version.

SEE ALSO

       qemu(1), passt(1).

       High-level documentation is available at https://passt.top/passt/about/.

                                                                                                         qrap(1)