+#. type: =head1
+#: ../src/guestfs.pod:2096
+msgid "EXTENDING LIBGUESTFS"
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2098
+msgid "ADDING A NEW API ACTION"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2100
+msgid ""
+"Large amounts of boilerplate code in libguestfs (RPC, bindings, "
+"documentation) are generated, and this makes it easy to extend the "
+"libguestfs API."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2104
+msgid "To add a new API action there are two changes:"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2110
+msgid ""
+"You need to add a description of the call (name, parameters, return type, "
+"tests, documentation) to C<generator/generator_actions.ml>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2113
+msgid ""
+"There are two sorts of API action, depending on whether the call goes "
+"through to the daemon in the appliance, or is serviced entirely by the "
+"library (see L</ARCHITECTURE> above). L</guestfs_sync> is an example of the "
+"former, since the sync is done in the appliance. L</guestfs_set_trace> is "
+"an example of the latter, since a trace flag is maintained in the handle and "
+"all tracing is done on the library side."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2121
+msgid ""
+"Most new actions are of the first type, and get added to the "
+"C<daemon_functions> list. Each function has a unique procedure number used "
+"in the RPC protocol which is assigned to that action when we publish "
+"libguestfs and cannot be reused. Take the latest procedure number and "
+"increment it."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2127
+msgid ""
+"For library-only actions of the second type, add to the "
+"C<non_daemon_functions> list. Since these functions are serviced by the "
+"library and do not travel over the RPC mechanism to the daemon, these "
+"functions do not need a procedure number, and so the procedure number is set "
+"to C<-1>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2135
+msgid "Implement the action (in C):"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2137
+msgid ""
+"For daemon actions, implement the function C<do_E<lt>nameE<gt>> in the "
+"C<daemon/> directory."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2140
+msgid ""
+"For library actions, implement the function C<guestfs__E<lt>nameE<gt>> "
+"(note: double underscore) in the C<src/> directory."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2143
+msgid "In either case, use another function as an example of what to do."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2147
+msgid "After making these changes, use C<make> to compile."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2149
+msgid ""
+"Note that you don't need to implement the RPC, language bindings, manual "
+"pages or anything else. It's all automatically generated from the OCaml "
+"description."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2153
+msgid "ADDING TESTS FOR AN API ACTION"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2155
+msgid ""
+"You can supply zero or as many tests as you want per API call. The tests "
+"can either be added as part of the API description (C<generator/"
+"generator_actions.ml>), or in some rarer cases you may want to drop a script "
+"into C<regressions/>. Note that adding a script to C<regressions/> is "
+"slower, so if possible use the first method."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2161
+msgid ""
+"The following describes the test environment used when you add an API test "
+"in C<generator_actions.ml>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2164
+msgid "The test environment has 4 block devices:"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2168
+msgid "C</dev/sda> 500MB"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2170
+msgid "General block device for testing."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2172
+msgid "C</dev/sdb> 50MB"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2174
+msgid ""
+"C</dev/sdb1> is an ext2 filesystem used for testing filesystem write "
+"operations."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2177
+msgid "C</dev/sdc> 10MB"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2179
+msgid "Used in a few tests where two block devices are needed."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2181
+msgid "C</dev/sdd>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2183
+msgid "ISO with fixed content (see C<images/test.iso>)."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2187
+msgid ""
+"To be able to run the tests in a reasonable amount of time, the libguestfs "
+"appliance and block devices are reused between tests. So don't try testing "
+"L</guestfs_kill_subprocess> :-x"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2191
+msgid ""
+"Each test starts with an initial scenario, selected using one of the "
+"C<Init*> expressions, described in C<generator/generator_types.ml>. These "
+"initialize the disks mentioned above in a particular way as documented in "
+"C<generator_types.ml>. You should not assume anything about the previous "
+"contents of other disks that are not initialized."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2197
+msgid ""
+"You can add a prerequisite clause to any individual test. This is a run-"
+"time check, which, if it fails, causes the test to be skipped. Useful if "
+"testing a command which might not work on all variations of libguestfs "
+"builds. A test that has prerequisite of C<Always> means to run "
+"unconditionally."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2203
+msgid ""
+"In addition, packagers can skip individual tests by setting environment "
+"variables before running C<make check>."
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2206
+#, no-wrap
+msgid ""
+" SKIP_TEST_<CMD>_<NUM>=1\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2208
+msgid "eg: C<SKIP_TEST_COMMAND_3=1> skips test #3 of L</guestfs_command>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2210
+msgid "or:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2212
+#, no-wrap
+msgid ""
+" SKIP_TEST_<CMD>=1\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2214
+msgid "eg: C<SKIP_TEST_ZEROFREE=1> skips all L</guestfs_zerofree> tests."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2216
+msgid "Packagers can run only certain tests by setting for example:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2218
+#, no-wrap
+msgid ""
+" TEST_ONLY=\"vfs_type zerofree\"\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2220
+msgid ""
+"See C<capitests/tests.c> for more details of how these environment variables "
+"work."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2223
+msgid "DEBUGGING NEW API ACTIONS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2225
+msgid "Test new actions work before submitting them."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2227
+msgid "You can use guestfish to try out new commands."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2229
+msgid ""
+"Debugging the daemon is a problem because it runs inside a minimal "
+"environment. However you can fprintf messages in the daemon to stderr, and "
+"they will show up if you use C<guestfish -v>."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2233
+msgid "FORMATTING CODE AND OTHER CONVENTIONS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2235
+msgid ""
+"Our C source code generally adheres to some basic code-formatting "
+"conventions. The existing code base is not totally consistent on this "
+"front, but we do prefer that contributed code be formatted similarly. In "
+"short, use spaces-not-TABs for indentation, use 2 spaces for each "
+"indentation level, and other than that, follow the K&R style."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2241
+msgid ""
+"If you use Emacs, add the following to one of one of your start-up files (e."
+"g., ~/.emacs), to help ensure that you get indentation right:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2244
+#, no-wrap
+msgid ""
+" ;;; In libguestfs, indent with spaces everywhere (not TABs).\n"
+" ;;; Exceptions: Makefile and ChangeLog modes.\n"
+" (add-hook 'find-file-hook\n"
+" '(lambda () (if (and buffer-file-name\n"
+" (string-match \"/libguestfs\\\\>\"\n"
+" (buffer-file-name))\n"
+" (not (string-equal mode-name \"Change Log\"))\n"
+" (not (string-equal mode-name \"Makefile\")))\n"
+" (setq indent-tabs-mode nil))))\n"
+" \n"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2254
+#, no-wrap
+msgid ""
+" ;;; When editing C sources in libguestfs, use this style.\n"
+" (defun libguestfs-c-mode ()\n"
+" \"C mode with adjusted defaults for use with libguestfs.\"\n"
+" (interactive)\n"
+" (c-set-style \"K&R\")\n"
+" (setq c-indent-level 2)\n"
+" (setq c-basic-offset 2))\n"
+" (add-hook 'c-mode-hook\n"
+" '(lambda () (if (string-match \"/libguestfs\\\\>\"\n"
+" (buffer-file-name))\n"
+" (libguestfs-c-mode))))\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2266
+msgid "Enable warnings when compiling (and fix any problems this finds):"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2269
+#, no-wrap
+msgid ""
+" ./configure --enable-gcc-warnings\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2271
+msgid "Useful targets are:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2273
+#, no-wrap
+msgid ""
+" make syntax-check # checks the syntax of the C code\n"
+" make check # runs the test suite\n"
+"\n"
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2276
+msgid "DAEMON CUSTOM PRINTF FORMATTERS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2278
+msgid ""
+"In the daemon code we have created custom printf formatters C<%Q> and C<%R>, "
+"which are used to do shell quoting."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2283
+msgid "%Q"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2285
+msgid ""
+"Simple shell quoted string. Any spaces or other shell characters are "
+"escaped for you."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2288
+msgid "%R"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2290
+msgid ""
+"Same as C<%Q> except the string is treated as a path which is prefixed by "
+"the sysroot."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2295 ../fish/guestfish.pod:240 ../fish/guestfish.pod:594
+msgid "For example:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2297
+#, no-wrap
+msgid ""
+" asprintf (&cmd, \"cat %R\", path);\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2299
+msgid "would produce C<cat /sysroot/some\\ path\\ with\\ spaces>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2301
+msgid ""
+"I<Note:> Do I<not> use these when you are passing parameters to the C<command"
+"{,r,v,rv}()> functions. These parameters do NOT need to be quoted because "
+"they are not passed via the shell (instead, straight to exec). You probably "
+"want to use the C<sysroot_path()> function however."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2307
+msgid "SUBMITTING YOUR NEW API ACTIONS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2309
+msgid ""
+"Submit patches to the mailing list: L<http://www.redhat.com/mailman/listinfo/"
+"libguestfs> and CC to L<rjones@redhat.com>."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2313
+msgid "INTERNATIONALIZATION (I18N) SUPPORT"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2315
+msgid "We support i18n (gettext anyhow) in the library."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2317
+msgid ""
+"However many messages come from the daemon, and we don't translate those at "
+"the moment. One reason is that the appliance generally has all locale files "
+"removed from it, because they take up a lot of space. So we'd have to readd "
+"some of those, as well as copying our PO files into the appliance."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2323
+msgid ""
+"Debugging messages are never translated, since they are intended for the "
+"programmers."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2326
+msgid "SOURCE CODE SUBDIRECTORIES"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2330
+msgid "C<appliance>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2332
+msgid "The libguestfs appliance, build scripts and so on."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2334
+msgid "C<capitests>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2336
+msgid "Automated tests of the C API."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2338
+msgid "C<cat>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2340
+msgid ""
+"The L<virt-cat(1)>, L<virt-filesystems(1)> and L<virt-ls(1)> commands and "
+"documentation."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2343
+msgid "C<contrib>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2345
+msgid "Outside contributions, experimental parts."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2347
+msgid "C<daemon>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2349
+msgid ""
+"The daemon that runs inside the libguestfs appliance and carries out actions."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2352
+msgid "C<df>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2354
+msgid "L<virt-df(1)> command and documentation."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2356
+msgid "C<examples>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2358
+msgid "C API example code."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2360
+msgid "C<fish>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2362
+msgid "L<guestfish(1)>, the command-line shell."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2364
+msgid "C<fuse>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2366
+msgid ""
+"L<guestmount(1)>, FUSE (userspace filesystem) built on top of libguestfs."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2368
+msgid "C<generator>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2370
+msgid ""
+"The crucially important generator, used to automatically generate large "
+"amounts of boilerplate C code for things like RPC and bindings."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2373
+msgid "C<images>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2375
+msgid "Files used by the test suite."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2377
+msgid "Some \"phony\" guest images which we test against."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2379
+msgid "C<inspector>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2381
+msgid "L<virt-inspector(1)>, the virtual machine image inspector."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2383
+msgid "C<m4>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2385
+msgid "M4 macros used by autoconf."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2387
+msgid "C<po>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2389
+msgid "Translations of simple gettext strings."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2391
+msgid "C<po-docs>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2393
+msgid ""
+"The build infrastructure and PO files for translations of manpages and POD "
+"files. Eventually this will be combined with the C<po> directory, but that "
+"is rather complicated."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2397
+msgid "C<regressions>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2399
+msgid "Regression tests."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2401
+msgid "C<rescue>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2403
+msgid "L<virt-rescue(1)> command and documentation."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2405
+msgid "C<src>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2407
+msgid "Source code to the C library."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2409
+msgid "C<tools>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2411
+msgid "Command line tools written in Perl (L<virt-resize(1)> and many others)."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2413
+msgid "C<test-tool>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2415
+msgid ""
+"Test tool for end users to test if their qemu/kernel combination will work "
+"with libguestfs."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2418
+msgid "C<csharp>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2420
+msgid "C<haskell>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2422
+msgid "C<java>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2424
+msgid "C<ocaml>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2426
+msgid "C<php>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2428
+msgid "C<perl>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2430
+msgid "C<python>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2432
+msgid "C<ruby>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2434
+msgid "Language bindings."
+msgstr ""
+
git.annexia.org / libguestfs.git / commitdiff