1nbdkit(1) NBDKIT nbdkit(1)
2
6 nbdkit - toolkit for creating NBD servers
7
9 nbdkit [-4|--ipv4-only] [-6|--ipv6-only]
10 [-D|--debug PLUGIN|FILTER|nbdkit.FLAG=N]
11 [--exit-with-parent] [-e|--exportname EXPORTNAME]
12 [--filter=FILTER ...] [-f|--foreground]
13 [-g|--group GROUP] [-i|--ipaddr IPADDR]
14 [--log=stderr|syslog|null] [--mask-handshake=MASK]
15 [-n|--newstyle] [--no-sr] [-o|--oldstyle]
16 [-P|--pidfile PIDFILE] [-p|--port PORT]
17 [-r|--readonly] [--run 'COMMAND ARGS ...']
18 [--selinux-label=LABEL] [-s|--single] [--swap]
19 [-t|--threads THREADS] [--tls=off|on|require]
20 [--tls-certificates=/path/to/certificates]
21 [--tls-psk=/path/to/pskfile] [--tls-verify-peer]
22 [-U|--unix SOCKET|-] [-u|--user USER]
23 [-v|--verbose] [--vsock]
24 PLUGIN [[KEY=]VALUE [KEY=VALUE [...]]]
25 nbdkit --dump-config
27 nbdkit PLUGIN --dump-plugin
29 nbdkit --help
31 nbdkit [-V|--version]
33
35 Network Block Device (NBD) is a network protocol for accessing block
36 devices over the network. Block devices are hard disks and things that
37 behave like hard disks such as disk images and virtual machines.
38 nbdkit is both a toolkit for creating NBD servers from “unconventional”
40 sources, and the name of an NBD server. nbdkit ships with many plugins
41 for performing common tasks like serving local files.
42 Plugins and filters
44 nbdkit is different from other NBD servers because you can easily
45 create new Network Block Device sources by writing a few glue
46 functions, possibly in C, or perhaps in a high level language like Perl
47 or Python. The liberal licensing of nbdkit is meant to allow you to
48 link nbdkit with proprietary libraries or to include nbdkit in
49 proprietary code.
50 If you want to write your own nbdkit plugin you should read
52 nbdkit-plugin(3).
53 nbdkit also has a concept of filters which can be layered on top of
55 plugins. Several filters are provided with nbdkit and if you want to
56 write your own you should read nbdkit-filter(3).
57
59 Basic file serving
60 • Serve file disk.img on port 10809 using nbdkit-file-plugin(1), and
61 connect to it using guestfish(1):
62 nbdkit file disk.img
64 guestfish --rw --format=raw -a nbd://localhost
65 • Serve file disk.img on port 10809, requiring clients to use
67 encrypted (TLS) connections:
68 nbdkit --tls=require file disk.img
70 Other nbdkit plugins
72 • Create a small disk containing test patterns using
73 nbdkit-data-plugin(1):
74 nbdkit data ' ( 0x55 0xAA )*2048 '
76 • Forward an NBD connection to a remote server over HTTPS or SSH
78 using nbdkit-curl-plugin(1) or nbdkit-ssh-plugin(1):
79 nbdkit -r curl https://example.com/disk.img
81 nbdkit ssh host=example.com /var/tmp/disk.img
83 • Create a sparse 1 terabyte RAM disk using nbdkit-memory-plugin(1)
85 and use it as a loop device (nbdkit-loop(1)):
86 nbdkit memory 1T
88 nbd-client localhost /dev/nbd0
89 • Create a floppy disk image containing files from a local directory
91 using nbdkit-floppy-plugin(1):
92 nbdkit floppy dir/
94 Combining plugins and filters
96 • Serve only the first partition from compressed disk image
97 disk.img.xz, combining nbdkit-partition-filter(1),
98 nbdkit-xz-filter(1) and nbdkit-file-plugin(1).
99 nbdkit --filter=partition --filter=xz file disk.img.xz partition=1
101 To understand this command line:
103 plugin name and plugin parameter
105 │
106 ┌───────┴──────┐
107 │ │
108 nbdkit --filter=partition --filter=xz file disk.img.xz partition=1
109 │ │ │
110 └──────────────┴────┬─────────────────────┘
111 │
112 filters and filter parameter
113 • Create a scratch, empty nbdkit device and inject errors and delays,
115 for testing clients, using nbdkit-memory-plugin(1),
116 nbdkit-error-filter(1) and nbdkit-delay-filter(1):
117 nbdkit --filter=error --filter=delay memory 100M \
119 error-rate=10% rdelay=1 wdelay=1
120 Writing plugins in shell script
122 • Write a simple, custom plugin in shell script using
123 nbdkit-sh-plugin(3):
124 nbdkit sh - <<'EOF'
126 case "$1" in
127 get_size) echo 1M ;;
128 pread) dd if=/dev/zero count=$3 iflag=count_bytes ;;
129 *) exit 2 ;;
130 esac
131 EOF
132 • The same example as above can be written entirely on the command
134 line using nbdkit-eval-plugin(1):
135 nbdkit eval get_size='echo 1M' \
137 pread='dd if=/dev/zero count=$3 iflag=count_bytes'
138 Display information
140 Display information about nbdkit or a specific plugin:
141 nbdkit --help
143 nbdkit --version
144 nbdkit --dump-config
145 nbdkit example1 --help
146 nbdkit example1 --dump-plugin
147
149 --help
150 Display brief command line usage information and exit.
151 -4
153 --ipv4-only
154 -6
155 --ipv6-only
156 When a non-numeric argument is passed to the -i option (such as a
157 Fully Qualified Domain Name, or a host name from "/etc/hosts"),
158 restrict the name resolution to IPv4 or IPv6 addresses.
159 When the -i option is omitted, listen on only the IPv4 or IPv6
161 address of all interfaces (0.0.0.0 or "::", respectively).
162 When both -4 and -6 options are present on the command line, the
164 last one takes effect.
165 -D PLUGIN.FLAG=N
167 -D FILTER.FLAG=N
168 --debug PLUGIN.FLAG=N
169 --debug FILTER.FLAG=N
170 Set the plugin or filter Debug Flag called "FLAG" to the integer
171 value "N". See "Debug Flags" in nbdkit-plugin(3).
172 -D nbdkit.FLAG=N
174 --debug nbdkit.FLAG=N
175 (nbdkit ≥ 1.18)
176 Set the nbdkit server Debug Flag called "FLAG" to the integer value
178 "N". See "SERVER DEBUG FLAGS" below.
179 --dump-config
181 Dump out the compile-time configuration values and exit. See
182 nbdkit-probing(1).
183 --dump-plugin
185 Dump out information about the plugin and exit. See
186 nbdkit-probing(1).
187 --exit-with-parent
189 If the parent process exits, we exit. This can be used to avoid
190 complicated cleanup or orphaned nbdkit processes. There are some
191 important caveats with this, see "EXIT WITH PARENT" in
192 nbdkit-captive(1).
193 An alternative to this is "CAPTIVE NBDKIT" in nbdkit-captive(1).
195 This option implies --foreground.
197 -e EXPORTNAME
199 --export=EXPORTNAME
200 --export-name=EXPORTNAME
201 --exportname=EXPORTNAME
202 Set a preferred exportname to expose in the shell environment
203 created during --run. The use of this option without --run has no
204 effect. This option does not change what nbdkit advertises as a
205 server, but can aid in writing a captive client that wants to
206 access particular content from a plugin that differentiates content
207 based on the client's choice of export name.
208 If not set, the --run environment is set to access the default
210 exportname "" (empty string).
211 --filter=FILTER
213 Add a filter before the plugin. This option may be given one or
214 more times to stack filters in front of the plugin. They are
215 processed in the order they appear on the command line. See
216 "FILTERS" and nbdkit-filter(3).
217 -f
219 --foreground
220 --no-fork
221 Don't fork into the background.
222 -g GROUP
224 --group=GROUP
225 Change group to "GROUP" after starting up. A group name or numeric
226 group ID can be used.
227 The server needs sufficient permissions to be able to do this.
229 Normally this would mean starting the server up as root.
230 See also -u.
232 -i IPADDR
234 --ip-addr=IPADDR
235 --ipaddr=IPADDR
236 Listen on the specified interface. The default is to listen on all
237 interfaces. See also -4, -6, and -p.
238 --log=stderr
240 --log=syslog
241 --log=null
242 Send error messages to standard error (--log=stderr), or to the
243 system log (--log=syslog), or discard them completely (--log=null,
244 not recommended for normal use).
245 The default is to send error messages to stderr, unless nbdkit
247 forks into the background in which case they are sent to syslog.
248 For more details see "LOGGING" in nbdkit-service(1).
250 --mask-handshake=MASK
252 This option can be used to mask off particular global features
253 which are advertised during new-style handshake (defaulting to all
254 supported bits set). See nbdkit-protocol(1).
255 -n
257 --new-style
258 --newstyle
259 Use the newstyle NBD protocol. This is the default in nbdkit ≥
260 1.3. In earlier versions the default was oldstyle. See
261 nbdkit-protocol(1).
262 --no-sr
264 Do not advertise structured replies. A client must request
265 structured replies to take advantage of block status and potential
266 sparse reads; however, as structured reads are not a mandatory part
267 of the newstyle NBD protocol, this option can be used to debug
268 client fallbacks for dealing with older servers. See
269 nbdkit-protocol(1).
270 -o
272 --old-style
273 --oldstyle
274 Use the oldstyle NBD protocol. This was the default in nbdkit ≤
275 1.2, but now the default is newstyle. Note this is incompatible
276 with newer features such as export names and TLS. See
277 nbdkit-protocol(1).
278 -P PIDFILE
280 --pid-file=PIDFILE
281 --pidfile=PIDFILE
282 Write "PIDFILE" (containing the process ID of the server) after
283 nbdkit becomes ready to accept connections.
284 If the file already exists, it is overwritten. nbdkit does not
286 delete the file when it exits.
287 -p PORT
289 --port=PORT
290 Change the TCP/IP port number on which nbdkit serves requests. The
291 default is 10809. See also -i.
292 -r
294 --read-only
295 --readonly
296 The export will be read-only. If a client writes, then it will get
297 an error.
298 Note that some plugins inherently don't support writes. With those
300 plugins the -r option is added implicitly.
301 nbdkit-cow-filter(1) can be placed over read-only plugins to
303 provide copy-on-write (or "snapshot") functionality. If you are
304 using qemu as a client then it also supports snapshots.
305 --run 'COMMAND ARGS ...'
307 Run nbdkit as a captive subprocess of the command. When the
308 command exits, nbdkit is killed. See "CAPTIVE NBDKIT" in
309 nbdkit-captive(1).
310 Note that the command is executed by /bin/sh. On some platforms
312 like Debian this might not be a full-featured shell.
313 This option implies --foreground.
315 --selinux-label=SOCKET-LABEL
317 Apply the SELinux label "SOCKET-LABEL" to the nbdkit listening
318 socket.
319 The common — perhaps only — use of this option is to allow libvirt
321 guests which are using SELinux and sVirt confinement to access
322 nbdkit Unix domain sockets. The example below shows how to do
323 this. Note that the socket and filesystem labels are different.
324 nbdkit -U /tmp/sock --selinux-label=system_u:object_r:svirt_socket_t:s0 ...
326 chcon system_u:object_r:svirt_image_t:s0 /tmp/sock
327 -s
329 --single
330 --stdin
331 Don't fork. Handle a single NBD connection on stdin/stdout. After
332 stdin closes, the server exits.
333 You can use this option to run nbdkit from inetd or similar
335 superservers; or just for testing; or if you want to run nbdkit in
336 a non-conventional way. Note that if you want to run nbdkit from
337 systemd, then it may be better to use "SOCKET ACTIVATION" in
338 nbdkit-service(1) instead of this option.
339 This option implies --foreground.
341 --swap
343 (nbdkit ≥ 1.18)
344 Specifies that the NBD device will be used as swap space loop
346 mounted on the same machine which is running nbdkit. To avoid
347 deadlocks this locks the whole nbdkit process into memory using
348 mlockall(2). This may require additional permissions, such as
349 starting the server as root or raising the "RLIMIT_MEMLOCK"
350 (ulimit(1) -l) limit on the process.
351 -t THREADS
353 --threads=THREADS
354 Set the number of threads to be used per connection, which in turn
355 controls the number of outstanding requests that can be processed
356 at once. Only matters for plugins with thread_model=parallel
357 (where it defaults to 16). To force serialized behavior (useful if
358 the client is not prepared for out-of-order responses), set this to
359 1.
360 --tls=off
362 --tls=on
363 --tls=require
364 Disable, enable or require TLS (authentication and encryption
365 support). See nbdkit-tls(1).
366 --tls-certificates=/path/to/certificates
368 Set the path to the TLS certificates directory. If not specified,
369 some built-in paths are checked. See nbdkit-tls(1) for more
370 details.
371 --tls-psk=/path/to/pskfile
373 Set the path to the pre-shared keys (PSK) file. If used, this
374 overrides certificate authentication. There is no built-in path.
375 See nbdkit-tls(1) for more details.
376 --tls-verify-peer
378 Enables TLS client certificate verification. The default is not to
379 check the client's certificate.
380 -U SOCKET
382 --unix=SOCKET
383 -U -
384 --unix -
385 Accept connections on the Unix domain socket "SOCKET" (which is a
386 path).
387 nbdkit creates this socket, but it will probably have incorrect
389 permissions (too permissive). If it is a problem that some
390 unauthorized user could connect to this socket between the time
391 that nbdkit starts up and the authorized user connects, then put
392 the socket into a directory that has restrictive permissions.
393 nbdkit does not delete the socket file when it exits. The caller
395 should delete the socket file after use (else if you try to start
396 nbdkit up again you will get an "Address already in use" error).
397 If the socket name is - then nbdkit generates a randomly named
399 private socket. This is useful with "CAPTIVE NBDKIT" in
400 nbdkit-captive(1).
401 -u USER
403 --user=USER
404 Change user to "USER" after starting up. A user name or numeric
405 user ID can be used.
406 The server needs sufficient permissions to be able to do this.
408 Normally this would mean starting the server up as root.
409 See also -g.
411 -v
413 --verbose
414 Enable verbose messages.
415 It's a good idea to use -f as well so the process does not fork
417 into the background (but not required).
418 -V
420 --version
421 Print the version number of nbdkit and exit.
422 The --dump-config option provides separate major and minor numbers
424 and may be easier to parse from shell scripts.
425 --vsock
427 (nbdkit ≥ 1.16)
428 Use the AF_VSOCK protocol (instead of TCP/IP). You must use this
430 in conjunction with -p/--port. See "AF_VSOCK" in
431 nbdkit-service(1).
432
434 You can give the full path to the plugin, like this:
435 nbdkit $libdir/nbdkit/plugins/nbdkit-file-plugin.so [...]
437 but it is usually more convenient to use this equivalent syntax:
439 nbdkit file [...]
441 $libdir is set at compile time. To print it out, do:
443 nbdkit --dump-config
445
447 After specifying the plugin name you can (optionally, it depends on the
448 plugin) give plugin configuration on the command line in the form of
449 "key=value". For example:
450 nbdkit file file=disk.img
452 To list all the options supported by a plugin, do:
454 nbdkit --help file
456 To dump information about a plugin, do:
458 nbdkit file --dump-plugin
460 Magic parameters
462 Some plugins declare a special "magic config key". This is a key which
463 is assumed if no "key=" part is present. For example:
464 nbdkit file disk.img
466 is assumed to be "file=disk.img" because the file plugin declares
468 "file" as its magic config key. There can be ambiguity in the parsing
469 of magic config keys if the value might look like a "key=value". If
470 there could be ambiguity then modify the value, eg. by prefixing it
471 with "./"
472 There is also a special exception for plugins which do not declare a
474 magic config key, but where the first plugin argument does not contain
475 an '=' character: it is assumed to be "script=value". This is used by
476 scripting language plugins:
477 nbdkit perl foo.pl [args...]
479 has the same meaning as:
481 nbdkit perl script=foo.pl [args...]
483 Shebang scripts
485 You can use "#!" to run nbdkit plugins written in most scripting
486 languages. The file should be executable. For example:
487 #!/usr/sbin/nbdkit perl
489 sub open {
490 # etc
491 }
492 (see nbdkit-perl-plugin(3) for a full example).
494
496 As well as enabling or disabling debugging in the server using
497 --verbose you can control extra debugging in the server using the
498 -D nbdkit.* flags listed in this section. Note these flags are an
499 internal implementation detail of the server and may be changed or
500 removed at any time in the future.
501 -D nbdkit.backend.controlpath=0
503 -D nbdkit.backend.controlpath=1
504 -D nbdkit.backend.datapath=0
505 -D nbdkit.backend.datapath=1
506 These flags control the verbosity of nbdkit backend debugging
507 messages (the ones which show every request processed by the
508 server). The default for both settings is 1 (normal debugging) but
509 you can set them to 0 to suppress these messages.
510 -D nbdkit.backend.datapath=0 is the more useful setting which lets
512 you suppress messages about pread, pwrite, zero, trim, etc.
513 commands. When transferring large amounts of data these messages
514 are numerous and not usually very interesting.
515 -D nbdkit.backend.controlpath=0 suppresses the non-datapath
517 commands (config, open, close, can_write, etc.)
518 -D nbdkit.tls.log=N
520 Enable TLS logging. "N" can be in the range 0 (no logging) to 99.
521 See gnutls_global_set_log_level(3).
522 -D nbdkit.tls.session=1
524 Print additional information about the TLS session, such as the
525 type of authentication and encryption, and client certificate
526 information.
527
529 nbdkit responds to the following signals:
530 "SIGINT"
532 "SIGQUIT"
533 "SIGTERM"
534 The server exits cleanly.
535 "SIGPIPE"
537 This signal is ignored.
538
540 "LISTEN_FDS"
541 "LISTEN_PID"
542 If present in the environment when nbdkit starts up, these trigger
543 "SOCKET ACTIVATION" in nbdkit-service(1).
544
546 Other topics
547 nbdkit-captive(1) — Run nbdkit under another process and have it
548 reliably cleaned up.
549 nbdkit-client(1) — How to mount NBD filesystems on a client machine.
551 nbdkit-loop(1) — Use nbdkit with the Linux kernel client to create loop
553 devices and loop mounts.
554 nbdkit-probing(1) — How to probe for nbdkit configuration and plugins.
556 nbdkit-protocol(1) — Which parts of the NBD protocol nbdkit supports.
558 nbdkit-security(1) — Lists past security issues in nbdkit.
560 nbdkit-service(1) — Running nbdkit as a service, and systemd socket
562 activation.
563 nbdkit-tls(1) — Authentication and encryption of NBD connections
565 (sometimes incorrectly called "SSL").
566 Plugins
568 nbdkit-cdi-plugin(1), nbdkit-curl-plugin(1), nbdkit-data-plugin(1),
569 nbdkit-eval-plugin(1), nbdkit-example1-plugin(1),
570 nbdkit-example2-plugin(1), nbdkit-example3-plugin(1),
571 nbdkit-example4-plugin(1), nbdkit-file-plugin(1),
572 nbdkit-floppy-plugin(1), nbdkit-full-plugin(1),
573 nbdkit-guestfs-plugin(1), nbdkit-info-plugin(1), nbdkit-iso-plugin(1),
574 nbdkit-libvirt-plugin(1), nbdkit-linuxdisk-plugin(1),
575 nbdkit-memory-plugin(1), nbdkit-nbd-plugin(1), nbdkit-null-plugin(1),
576 nbdkit-ondemand-plugin(1), nbdkit-partitioning-plugin(1),
577 nbdkit-pattern-plugin(1), nbdkit-random-plugin(1), nbdkit-S3-plugin(1),
578 nbdkit-sparse-random-plugin(1), nbdkit-split-plugin(1),
579 nbdkit-ssh-plugin(1), nbdkit-tmpdisk-plugin(1),
580 nbdkit-torrent-plugin(1), nbdkit-vddk-plugin(1), nbdkit-zero-plugin(1)
581 ; nbdkit-cc-plugin(3), nbdkit-golang-plugin(3), nbdkit-lua-plugin(3),
582 nbdkit-ocaml-plugin(3), nbdkit-perl-plugin(3), nbdkit-python-plugin(3),
583 nbdkit-ruby-plugin(3), nbdkit-rust-plugin(3), nbdkit-sh-plugin(3),
584 nbdkit-tcl-plugin(3) .
585 Filters
587 nbdkit-blocksize-filter(1), nbdkit-blocksize-policy-filter(1),
588 nbdkit-cache-filter(1), nbdkit-cacheextents-filter(1),
589 nbdkit-checkwrite-filter(1), nbdkit-cow-filter(1),
590 nbdkit-ddrescue-filter(1), nbdkit-delay-filter(1),
591 nbdkit-error-filter(1), nbdkit-exitlast-filter(1),
592 nbdkit-exitwhen-filter(1), nbdkit-exportname-filter(1),
593 nbdkit-ext2-filter(1), nbdkit-extentlist-filter(1),
594 nbdkit-fua-filter(1), nbdkit-gzip-filter(1), nbdkit-ip-filter(1),
595 nbdkit-limit-filter(1), nbdkit-log-filter(1), nbdkit-luks-filter(1),
596 nbdkit-multi-conn-filter(1), nbdkit-nocache-filter(1),
597 nbdkit-noextents-filter(1), nbdkit-nofilter-filter(1),
598 nbdkit-noparallel-filter(1), nbdkit-nozero-filter(1),
599 nbdkit-offset-filter(1), nbdkit-partition-filter(1),
600 nbdkit-pause-filter(1), nbdkit-protect-filter(1),
601 nbdkit-rate-filter(1), nbdkit-readahead-filter(1),
602 nbdkit-retry-filter(1), nbdkit-retry-request-filter(1),
603 nbdkit-scan-filter(1), nbdkit-stats-filter(1), nbdkit-swab-filter(1),
604 nbdkit-tar-filter(1), nbdkit-tls-fallback-filter(1),
605 nbdkit-truncate-filter(1), nbdkit-xz-filter(1) .
606 For developers
608 nbdkit-plugin(3), nbdkit-filter(3).
609 Writing plugins in other programming languages
611 nbdkit-cc-plugin(3), nbdkit-golang-plugin(3), nbdkit-lua-plugin(3),
612 nbdkit-ocaml-plugin(3), nbdkit-perl-plugin(3), nbdkit-python-plugin(3),
613 nbdkit-ruby-plugin(3), nbdkit-rust-plugin(3), nbdkit-sh-plugin(3),
614 nbdkit-tcl-plugin(3) .
615 Release notes for previous releases of nbdkit
617 nbdkit-release-notes-1.32(1), nbdkit-release-notes-1.30(1),
618 nbdkit-release-notes-1.28(1), nbdkit-release-notes-1.26(1),
619 nbdkit-release-notes-1.24(1), nbdkit-release-notes-1.22(1),
620 nbdkit-release-notes-1.20(1), nbdkit-release-notes-1.18(1),
621 nbdkit-release-notes-1.16(1), nbdkit-release-notes-1.14(1),
622 nbdkit-release-notes-1.12(1), nbdkit-release-notes-1.10(1),
623 nbdkit-release-notes-1.8(1), nbdkit-release-notes-1.6(1),
624 nbdkit-release-notes-1.4(1).
625 NBD clients
627 guestfish(1), libnbd(3), nbd-client(1), nbdcopy(1), nbdfuse(1),
628 nbdinfo(1), nbdsh(1), qemu(1).
629 nbdkit links
631 http://gitlab.com/nbdkit/nbdkit — Source code.
632 Other NBD servers
634 qemu-nbd(1), nbd-server(1), https://bitbucket.org/hirofuchi/xnbd.
635 Documentation for the NBD protocol
637 https://github.com/NetworkBlockDevice/nbd/blob/master/doc/proto.md,
638 https://nbd.sourceforge.io/.
639 Similar protocols
641 https://en.wikipedia.org/wiki/iSCSI,
642 https://en.wikipedia.org/wiki/ATA_over_Ethernet,
643 https://en.wikipedia.org/wiki/Fibre_Channel_over_Ethernet.
644 Other manual pages of interest
646 gnutls_priority_init(3), qemu-img(1), psktool(1), systemd.socket(5).
647
649 Eric Blake
650 Laszlo Ersek
652 Richard W.M. Jones
654 Yann E. MORIN
656 Nikolaus Rath
658 François Revol
660 Nir Soffer
662 Alan Somers
664 Pino Toscano
666
668 Copyright (C) 2013-2020 Red Hat Inc.
669
671 Redistribution and use in source and binary forms, with or without
672 modification, are permitted provided that the following conditions are
673 met:
674 • Redistributions of source code must retain the above copyright
676 notice, this list of conditions and the following disclaimer.
677 • Redistributions in binary form must reproduce the above copyright
679 notice, this list of conditions and the following disclaimer in the
680 documentation and/or other materials provided with the
681 distribution.
682 • Neither the name of Red Hat nor the names of its contributors may
684 be used to endorse or promote products derived from this software
685 without specific prior written permission.
686 THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND ANY
688 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
689 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
690 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR CONTRIBUTORS BE
691 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
692 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
693 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
694 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
695 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
696 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
697 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
698nbdkit-1.32.5 2023-01-03 nbdkit(1)