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ca2749e1bd
In practical terms, passt doesn't benefit from the additional protection offered by the AGPL over the GPL, because it's not suitable to be executed over a computer network. Further, restricting the distribution under the version 3 of the GPL wouldn't provide any practical advantage either, as long as the passt codebase is concerned, and might cause unnecessary compatibility dilemmas. Change licensing terms to the GNU General Public License Version 2, or any later version, with written permission from all current and past contributors, namely: myself, David Gibson, Laine Stump, Andrea Bolognani, Paul Holzinger, Richard W.M. Jones, Chris Kuhn, Florian Weimer, Giuseppe Scrivano, Stefan Hajnoczi, and Vasiliy Ulyanov. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
78 lines
2.5 KiB
Groff
78 lines
2.5 KiB
Groff
.\" SPDX-License-Identifier: GPL-2.0-or-later
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.\" Copyright (c) 2020-2021 Red Hat GmbH
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.\" Author: Stefano Brivio <sbrivio@redhat.com>
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.TH qrap 1
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.SH NAME
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.B qrap
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\- temporary qemu wrapper connecting UNIX domain socket to file descriptor
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.SH SYNOPSIS
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.B qrap
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[\fIFDNUM\fR \fIQEMU_CMD\fR] [\fIQEMU_ARG\fR]...
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.SH DESCRIPTION
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\fBqrap\fR is a wrapper, designed specifically for usage with \fBqemu\fR(1) and
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\fBpasst\fR(1), connecting a UNIX domain socket to a file descriptor, and
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running \fBqemu\fR(1) with given arguments.
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A running instance of \fBpasst\fR(1) is probed checking for UNIX domain sockets,
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answering a dummy ARP request, with names starting from
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\fI/tmp/passt_1.socket\fR up to \fI/tmp/passt_64.socket\fR.
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If first and second arguments are not a socket number and a command, that is,
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respectively, \fIFDNUM\fR and \fIQEMU_CMD\fR, \fBqrap\fR will try to locate a
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qemu executable in \fBPATH\fR and patch the command line to specify a network
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device and a \fInetdev\fR back-end for usage with \fBpasst\fR(1).
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If \fBqrap\fR patches the command line, it will remove any potentially
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conflicting network device, that is, any \fI-netdev\fR or \fI-net\fR option, or
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any \fI-device\fR option with argument starting with \fIvirtio-net-pci,\fR,
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\fIvirtio-net-ccw,\fR, \fIe1000,\fR, \fIe1000e,\fR, or \fIrtl8139,\fR.
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.SH EXAMPLES
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.BR "Start qemu explicitly passing its command name and a socket number"
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.RS
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.nf
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$ ./qrap 5 kvm test.qcow2 -m 1024 -display none -nodefaults -nographic -net socket,fd=5 -net nic,model=virtio
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.fi
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.RE
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.BR "Start qemu without command name and socket number, patching arguments"
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.RS
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.nf
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$ ./qrap test.qcow2 -m 1024 -display none -nodefaults -nographic
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.fi
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.RE
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.SH NOTES
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This wrapper is temporary: qemu commit 13c6be96618c ("net: stream: add unix
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socket") introduces native AF_UNIX socket support, and it should be included in
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qemu starting from the 7.2 release. It will be around for a little bit longer to
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give users enough time to switch.
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.SH AUTHOR
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Stefano Brivio <sbrivio@redhat.com>
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.SH REPORTING BUGS
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No public bug tracker is available at this time. For the moment being, report
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issues to Stefano Brivio <sbrivio@redhat.com>.
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.SH COPYRIGHT
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Copyright (c) 2020-2021 Red Hat GmbH.
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\fBqrap\fR is free software: you can redistribute is and/or modify it under the
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terms of the GNU Affero General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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.SH SEE ALSO
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\fBqemu\fR(1), \fBpasst\fR(1).
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High-level documentation is available at https://passt.top/passt/about/.
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