--- plugins/tar/{tar.pl => nbdkit-tar-plugin.pod} | 145 ++------- configure.ac | 2 - plugins/tar/Makefile.am | 41 +-- tests/Makefile.am | 14 +- plugins/tar/tar.c | 286 ++++++++++++++++++ tests/test-dump-plugin.sh | 2 +- tests/test-help-plugin.sh | 2 +- tests/test-tar-info.sh | 67 ++++ tests/test-tar.sh | 22 +- tests/test-version-plugin.sh | 2 +- wrapper.c | 2 +- .gitignore | 1 - README | 4 +- 13 files changed, 427 insertions(+), 163 deletions(-) diff --git a/plugins/tar/tar.pl b/plugins/tar/nbdkit-tar-plugin.pod similarity index 52% rename from plugins/tar/tar.pl rename to plugins/tar/nbdkit-tar-plugin.pod index 9b05b83d..589e114b 100644 --- a/plugins/tar/tar.pl +++ b/plugins/tar/nbdkit-tar-plugin.pod @@ -1,21 +1,16 @@ -#!@sbindir@/nbdkit perl -# -*- perl -*- - -=pod - =head1 NAME nbdkit-tar-plugin - read and write files inside tar files without unpacking =head1 SYNOPSIS - nbdkit tar tar=FILENAME.tar file=PATH_INSIDE_TAR + nbdkit tar [tar=]FILENAME.tar file=PATH_INSIDE_TAR =head1 EXAMPLES =head2 Serve a single file inside a tarball - nbdkit tar tar=file.tar file=some/disk.img + nbdkit tar file.tar file=some/disk.img guestfish --format=raw -a nbd://localhost =head2 Opening a disk image inside an OVA file @@ -28,7 +23,7 @@ could access one file in an OVA like this: rhel.ovf rhel-disk1.vmdk rhel.mf - $ nbdkit -r tar tar=rhel.ova file=rhel-disk1.vmdk + $ nbdkit -r tar rhel.ova file=rhel-disk1.vmdk $ guestfish --ro --format=vmdk -a nbd://localhost In this case the tarball is opened readonly (I<-r> option). The @@ -55,6 +50,27 @@ modified. Without I<-r> writes will modify the tar file. The disk image cannot be resized. +=head1 PARAMETERS + +=over 4 + +=item [B<tar=>]FILENAME.tar + +The path of the tarball. This parameter is required. + +C<tar=> is a magic config key and may be omitted in most cases. +See L<nbdkit(1)/Magic parameters>. + +=item B<file=>PATH_INSIDE_TAR + +The path of the file inside the tarball to serve. This parameter is +required. It must exactly match the name stored in the tarball, so +use S<C<tar tf filename.tar>> + +=back + +=head1 NOTE + =head2 Alternatives to the tar plugin The tar plugin ought to be a filter so that you can extract files from @@ -94,11 +110,9 @@ C<nbdkit-tar-plugin> first appeared in nbdkit 1.2. =head1 SEE ALSO -L<https://github.com/libguestfs/nbdkit/blob/master/plugins/tar/tar.pl>, L<nbdkit(1)>, L<nbdkit-offset-filter(1)>, L<nbdkit-plugin(3)>, -L<nbdkit-perl-plugin(3)>, L<nbdkit-xz-filter(1)>, L<tar(1)>. @@ -111,114 +125,3 @@ Based on the virt-v2v OVA importer written by Tomáš Golembiovský. =head1 COPYRIGHT Copyright (C) 2017-2020 Red Hat Inc. - -=cut - -use strict; - -use Cwd qw(abs_path); -use IO::File; - -my $tar; # Tar file. -my $file; # File within the tar file. -my $offset; # Offset within tar file. -my $size; # Size of disk image within tar file. - -sub config -{ - my $k = shift; - my $v = shift; - - if ($k eq "tar") { - $tar = abs_path ($v); - } - elsif ($k eq "file") { - $file = $v; - } - else { - die "unknown parameter $k"; - } -} - -# Check all the config parameters were set. -sub config_complete -{ - die "tar or file parameter was not set\n" - unless defined $tar && defined $file; - - die "$tar: file not found\n" - unless -f $tar; -} - -# Find the extent of the file within the tar file. -sub get_ready -{ - open (my $pipe, "-|", "tar", "--no-auto-compress", "-tRvf", $tar, $file) - or die "$tar: could not open or parse tar file, see errors above"; - while (<$pipe>) { - if (/^block\s(\d+):\s\S+\s\S+\s(\d+)/) { - # Add one for the tar header, and multiply by the block size. - $offset = ($1 + 1) * 512; - $size = $2; - Nbdkit::debug ("tar: file: $file offset: $offset size: $size") - } - } - close ($pipe); - - die "offset or size could not be parsed. Probably the tar file is not a tar file or the file does not exist in the tar file. See any errors above.\n" - unless defined $offset && defined $size; -} - -# Accept a connection from a client, create and return the handle -# which is passed back to other calls. -sub open -{ - my $readonly = shift; - my $mode = "<"; - $mode = "+<" unless $readonly; - my $fh = IO::File->new; - $fh->open ($tar, $mode) or die "$tar: open: $!"; - $fh->binmode; - my $h = { fh => $fh, readonly => $readonly }; - return $h; -} - -# Close the connection. -sub close -{ - my $h = shift; - my $fh = $h->{fh}; - $fh->close; -} - -# Return the size. -sub get_size -{ - my $h = shift; - return $size; -} - -# Read. -sub pread -{ - my $h = shift; - my $fh = $h->{fh}; - my $count = shift; - my $offs = shift; - $fh->seek ($offset + $offs, 0) or die "seek: $!"; - my $r; - $fh->read ($r, $count) or die "read: $!"; - return $r; -} - -# Write. -sub pwrite -{ - my $h = shift; - my $fh = $h->{fh}; - my $buf = shift; - my $count = length ($buf); - my $offs = shift; - $fh->seek ($offset + $offs, 0) or die "seek: $!"; - print $fh ($buf); -} diff --git a/configure.ac b/configure.ac index af7e6e3b..237ecd75 100644 --- a/configure.ac +++ b/configure.ac @@ -1221,8 +1221,6 @@ feature "nbd .................................... " \ test "x$HAVE_LIBNBD_TRUE" = "x" feature "ssh .................................... " \ test "x$HAVE_SSH_TRUE" = "x" -feature "tar .................................... " \ - test "x$HAVE_PERL_TRUE" = "x" feature "torrent ................................ " \ test "x$HAVE_TORRENT_TRUE" = "x" feature "vddk ................................... " \ diff --git a/plugins/tar/Makefile.am b/plugins/tar/Makefile.am index 09a6caa9..14d57e04 100644 --- a/plugins/tar/Makefile.am +++ b/plugins/tar/Makefile.am @@ -1,5 +1,5 @@ # nbdkit -# Copyright (C) 2013-2020 Red Hat Inc. +# Copyright (C) 2018-2020 Red Hat Inc. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are @@ -31,34 +31,37 @@ include $(top_srcdir)/common-rules.mk -source = tar.pl +EXTRA_DIST = nbdkit-tar-plugin.pod -EXTRA_DIST = \ - $(source) \ - $(NULL) - -if HAVE_PERL +plugin_LTLIBRARIES = nbdkit-tar-plugin.la -plugin_SCRIPTS = nbdkit-tar-plugin -CLEANFILES += nbdkit-tar-plugin +nbdkit_tar_plugin_la_SOURCES = \ + tar.c \ + $(top_srcdir)/include/nbdkit-plugin.h \ + $(NULL) -# We have to do the rewriting here to avoid stupid exec_prefix. -nbdkit-tar-plugin: $(source) - rm -f $@ $@-t - sed 's,\@sbindir\@,${sbindir},g' < $< > $@-t - mv $@-t $@ - chmod 0555 $@ +nbdkit_tar_plugin_la_CPPFLAGS = \ + -I$(top_srcdir)/common/utils \ + -I$(top_srcdir)/include \ + -I. \ + $(NULL) +nbdkit_tar_plugin_la_CFLAGS = $(WARNINGS_CFLAGS) +nbdkit_tar_plugin_la_LDFLAGS = \ + -module -avoid-version -shared $(SHARED_LDFLAGS) \ + -Wl,--version-script=$(top_srcdir)/plugins/plugins.syms \ + $(NULL) +nbdkit_tar_plugin_la_LIBADD = \ + $(top_builddir)/common/utils/libutils.la \ + $(NULL) if HAVE_POD man_MANS = nbdkit-tar-plugin.1 CLEANFILES += $(man_MANS) -nbdkit-tar-plugin.1: $(source) - $(PODWRAPPER) --section=1 --name nbdkit-tar-plugin --man $@ \ +nbdkit-tar-plugin.1: nbdkit-tar-plugin.pod + $(PODWRAPPER) --section=1 --man $@ \ --html $(top_builddir)/html/$@.html \ $< endif HAVE_POD - -endif diff --git a/tests/Makefile.am b/tests/Makefile.am index 16043f49..9ab6a7af 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -828,11 +828,15 @@ test_streaming_SOURCES = test-streaming.c test_streaming_CFLAGS = $(WARNINGS_CFLAGS) $(LIBNBD_CFLAGS) test_streaming_LDADD = $(LIBNBD_LIBS) -# tar plugin test (written in perl). -if HAVE_PERL -TESTS += test-tar.sh -endif HAVE_PERL -EXTRA_DIST += test-tar.sh +# tar plugin test. +TESTS += \ + test-tar.sh \ + test-tar-info.sh \ + $(NULL) +EXTRA_DIST += \ + test-tar.sh \ + test-tar-info.sh \ + $(NULL) # tmpdisk plugin test. LIBGUESTFS_TESTS += test-tmpdisk diff --git a/plugins/tar/tar.c b/plugins/tar/tar.c new file mode 100644 index 00000000..fe298035 --- /dev/null +++ b/plugins/tar/tar.c @@ -0,0 +1,286 @@ +/* nbdkit + * Copyright (C) 2018-2020 Red Hat Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * * Neither the name of Red Hat nor the names of its contributors may be + * used to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <config.h> + +#include <stdio.h> +#include <stdlib.h> +#include <stdbool.h> +#include <stdint.h> +#include <inttypes.h> +#include <string.h> +#include <unistd.h> +#include <fcntl.h> +#include <assert.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include <nbdkit-plugin.h> + +#include "cleanup.h" +#include "utils.h" + +static char *tarfile; /* The tar file (tar= parameter). */ +static const char *file; /* File within tar (file=). */ +static uint64_t offset, size; /* Offset and size within tarball. */ + +static void +tar_unload (void) +{ + free (tarfile); +} + +static int +tar_config (const char *key, const char *value) +{ + if (strcmp (key, "tar") == 0) { + if (tarfile) { + nbdkit_error ("only one tar parameter can be given"); + return -1; + } + tarfile = nbdkit_realpath (value); + if (tarfile == NULL) + return -1; + } + else if (strcmp (key, "file") == 0) { + if (file) { + nbdkit_error ("only one file parameter can be given"); + return -1; + } + file = value; + } + else { + nbdkit_error ("unknown parameter '%s'", key); + return -1; + } + + return 0; +} + +static int +tar_config_complete (void) +{ + if (tarfile == NULL || file == NULL) { + nbdkit_error ("you must supply the tar=<TARFILE> and file=<FILENAME> " + "parameters"); + return -1; + } + + return 0; +} + +#define tar_config_help \ + "[tar=]<TARBALL> (required) The name of the tar file.\n" \ + "file=<FILENAME> The path inside the tar file to server." + +static int +tar_get_ready (void) +{ + FILE *fp; + CLEANUP_FREE char *cmd = NULL; + size_t len = 0; + bool scanned_ok; + char s[256]; + + /* Construct the tar command to examine the tar file. */ + fp = open_memstream (&cmd, &len); + if (fp == NULL) { + nbdkit_error ("open_memstream: %m"); + return -1; + } + fprintf (fp, "LANG=C tar --no-auto-compress -tRvf "); + shell_quote (tarfile, fp); + fputc (' ', fp); + shell_quote (file, fp); + if (fclose (fp) == EOF) { + nbdkit_error ("memstream failed: %m"); + return -1; + } + + /* Run the command and read the first line of the output. */ + nbdkit_debug ("%s", cmd); + fp = popen (cmd, "r"); + if (fp == NULL) { + nbdkit_error ("tar: %m"); + return -1; + } + scanned_ok = fscanf (fp, "block %" SCNu64 ": %*s %*s %" SCNu64, + &offset, &size) == 2; + /* We have to now read and discard the rest of the output until EOF. */ + while (fread (s, sizeof s, 1, fp) > 0) + ; + if (pclose (fp) != 0) { + nbdkit_error ("tar subcommand failed, " + "check that the file really exists in the tarball"); + return -1; + } + + if (!scanned_ok) { + nbdkit_error ("unexpected output from the tar subcommand"); + return -1; + } + + /* Adjust the offset: Add 1 for the tar header, then multiply by the + * block size. + */ + offset = (offset+1) * 512; + + nbdkit_debug ("tar: offset %" PRIu64 ", size %" PRIu64, offset, size); + + /* Check it looks sensible. XXX We ought to check it doesn't exceed + * the size of the tar file. + */ + if (offset >= INT64_MAX || size >= INT64_MAX) { + nbdkit_error ("internal error: calculated offset and size are wrong"); + return -1; + } + + return 0; +} + +struct handle { + int fd; +}; + +static void * +tar_open (int readonly) +{ + struct handle *h; + + assert (offset > 0); /* Cannot be zero because of tar header. */ + + h = calloc (1, sizeof *h); + if (h == NULL) { + nbdkit_error ("calloc: %m"); + return NULL; + } + h->fd = open (tarfile, (readonly ? O_RDONLY : O_RDWR) | O_CLOEXEC); + if (h->fd == -1) { + nbdkit_error ("%s: %m", tarfile); + free (h); + return NULL; + } + + return h; +} + +#define THREAD_MODEL NBDKIT_THREAD_MODEL_PARALLEL + +/* Get the file size. */ +static int64_t +tar_get_size (void *handle) +{ + return size; +} + +/* Serves the same data over multiple connections. */ +static int +tar_can_multi_conn (void *handle) +{ + return 1; +} + +static int +tar_can_cache (void *handle) +{ + /* Let nbdkit call pread to populate the file system cache. */ + return NBDKIT_CACHE_EMULATE; +} + +/* Read data from the file. */ +static int +tar_pread (void *handle, void *buf, uint32_t count, uint64_t offs) +{ + struct handle *h = handle; + + offs += offset; + + while (count > 0) { + ssize_t r = pread (h->fd, buf, count, offs); + if (r == -1) { + nbdkit_error ("pread: %m"); + return -1; + } + if (r == 0) { + nbdkit_error ("pread: unexpected end of file"); + return -1; + } + buf += r; + count -= r; + offs += r; + } + + return 0; +} + +/* Write data to the file. */ +static int +tar_pwrite (void *handle, const void *buf, uint32_t count, uint64_t offs) +{ + struct handle *h = handle; + + offs += offset; + + while (count > 0) { + ssize_t r = pwrite (h->fd, buf, count, offs); + if (r == -1) { + nbdkit_error ("pwrite: %m"); + return -1; + } + buf += r; + count -= r; + offs += r; + } + + return 0; +} + +static struct nbdkit_plugin plugin = { + .name = "tar", + .longname = "nbdkit tar plugin", + .version = PACKAGE_VERSION, + .unload = tar_unload, + .config = tar_config, + .config_complete = tar_config_complete, + .config_help = tar_config_help, + .magic_config_key = "tar", + .get_ready = tar_get_ready, + .open = tar_open, + .get_size = tar_get_size, + .can_multi_conn = tar_can_multi_conn, + .can_cache = tar_can_cache, + .pread = tar_pread, + .pwrite = tar_pwrite, + .errno_is_preserved = 1, +}; + +NBDKIT_REGISTER_PLUGIN(plugin) diff --git a/tests/test-dump-plugin.sh b/tests/test-dump-plugin.sh index 0b4c1ce1..6eb25a65 100755 --- a/tests/test-dump-plugin.sh +++ b/tests/test-dump-plugin.sh @@ -46,7 +46,7 @@ do_test () python-valgrind | ruby-valgrind | tcl-valgrind) echo "$0: skipping $1$vg because this language doesn't support valgrind" ;; - example4* | tar*) + example4*) # These tests are written in Perl so we have to check that # the Perl plugin was compiled. if nbdkit perl --version; then run_test $1; fi diff --git a/tests/test-help-plugin.sh b/tests/test-help-plugin.sh index 7dc26ece..f0dfa7df 100755 --- a/tests/test-help-plugin.sh +++ b/tests/test-help-plugin.sh @@ -46,7 +46,7 @@ do_test () python-valgrind | ruby-valgrind | tcl-valgrind) echo "$0: skipping $1$vg because this language doesn't support valgrind" ;; - example4* | tar*) + example4*) # These tests are written in Perl so we have to check that # the Perl plugin was compiled. if nbdkit perl --version; then run_test $1; fi diff --git a/tests/test-tar-info.sh b/tests/test-tar-info.sh new file mode 100755 index 00000000..efaa8ec8 --- /dev/null +++ b/tests/test-tar-info.sh @@ -0,0 +1,67 @@ +#!/usr/bin/env bash +# nbdkit +# Copyright (C) 2017-2020 Red Hat Inc. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# +# * Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# +# * Neither the name of Red Hat nor the names of its contributors may be +# used to endorse or promote products derived from this software without +# specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, +# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR +# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF +# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND +# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT +# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +# SUCH DAMAGE. + +# Test that qemu-img info works on a qcow2 file in a tar file. + +source ./functions.sh +set -e +set -x + +requires test -f disk +requires guestfish --version +requires tar --version +requires qemu-img --version +requires qemu-img info --output=json /dev/null +requires jq --version +requires stat --version + +disk=tar-info-disk.qcow2 +out=tar-info.out +tar=tar-info.tar +files="$disk $out $tar" +rm -f $files +cleanup_fn rm -f $files + +# Create a tar file containing a known qcow2 file. +qemu-img convert -f raw disk -O qcow2 $disk +tar cf $tar $disk + +# Run nbdkit. +nbdkit -U - tar $tar file=$disk --run 'qemu-img info --output=json $nbd' > $out +cat $out + +# Check various fields in the input. +# Virtual size must be the same as the size of the original raw disk. +test "$( jq -r -c '.["virtual-size"]' $out )" -eq "$( stat -c %s disk )" + +# Format must be qcow2. +test "$( jq -r -c '.["format"]' $out )" = "qcow2" diff --git a/tests/test-tar.sh b/tests/test-tar.sh index c6d726c4..3164b826 100755 --- a/tests/test-tar.sh +++ b/tests/test-tar.sh @@ -38,23 +38,27 @@ requires test -f disk requires guestfish --version requires tar --version -# The tar plugin requires some Perl modules, this checks if they are -# installed. -requires perl -MCwd -e 1 -requires perl -MIO::File -e 1 - sock=`mktemp -u` files="tar.pid tar.tar $sock" rm -f $files cleanup_fn rm -f $files -# Create a tar file containing the disk image. -tar cf tar.tar disk +# Create a tar file containing the disk image plus some other random +# files that hopefully will be ignored. +tar cf tar.tar test-tar.sh Makefile disk Makefile.am +tar tvvf tar.tar # Run nbdkit. start_nbdkit -P tar.pid -U $sock tar tar=tar.tar file=disk -# Now see if we can open the disk from the tar file. -guestfish -x --ro --format=raw -a "nbd://?socket=$sock" -m /dev/sda1 <<EOF +# Now see if we can open, read and write the disk from the tar file. +guestfish -x --format=raw -a "nbd://?socket=$sock" -m /dev/sda1 <<EOF cat /hello.txt + + # Write a new file. + write /test.txt "hello" + cat /test.txt EOF + +# Check that the tar file isn't corrupt. +tar tvvf tar.tar diff --git a/tests/test-version-plugin.sh b/tests/test-version-plugin.sh index 7d2ab072..c397afc2 100755 --- a/tests/test-version-plugin.sh +++ b/tests/test-version-plugin.sh @@ -46,7 +46,7 @@ do_test () python-valgrind | ruby-valgrind | tcl-valgrind) echo "$0: skipping $1$vg because this language doesn't support valgrind" ;; - example4* | tar*) + example4*) # These tests are written in Perl so we have to check that # the Perl plugin was compiled. if nbdkit perl --version; then run_test $1; fi diff --git a/wrapper.c b/wrapper.c index b1e2ce2f..c27afae0 100644 --- a/wrapper.c +++ b/wrapper.c @@ -85,7 +85,7 @@ static size_t len; static bool is_perl_plugin (const char *name) { - return strcmp (name, "example4") == 0 || strcmp (name, "tar") == 0; + return strcmp (name, "example4") == 0; } static void diff --git a/.gitignore b/.gitignore index f02d19dc..48a5302e 100644 --- a/.gitignore +++ b/.gitignore @@ -79,7 +79,6 @@ plugins/*/*.3 /plugins/ocaml/nbdkit-ocamlexample-plugin.so /plugins/rust/Cargo.lock /plugins/rust/target -/plugins/tar/nbdkit-tar-plugin /plugins/tmpdisk/default-command.c /podwrapper.pl /server/local/nbdkit.pc diff --git a/README b/README index 4f584828..7733761e 100644 --- a/README +++ b/README @@ -124,13 +124,13 @@ For the bittorrent plugin: - libtorrent-rasterbar (https://www.libtorrent.org) -For the Perl, example4 and tar plugins: +For the Perl and example4 plugins: - perl interpreter - perl development libraries - - perl modules ExtUtils::Embed, IO::File and Cwd + - perl modules ExtUtils::Embed For the Python plugin: -- 2.25.0