qrap(1) General Commands Manual qrap(1)
NAME
qrap - temporary qemu wrapper connecting UNIX domain socket to file de-
scriptor
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 run-
ning qemu(1) with given arguments.
A running instance of passt(1) is probed checking for UNIX domain sock-
ets, 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 con-
flicting 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 General Public License as published by the Free
Software Foundation, either version 2 of the License, or (at your op-
tion) any later version.
SEE ALSO
qemu(1), passt(1).
High-level documentation is available at https://passt.top/passt/about/.
qrap(1)
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