1 PLEASE LOOK AT THE TOP OF EACH FILE BEFORE EDITING TO SEE WHETHER IT
2 IS AUTOMATICALLY GENERATED OR NOT.
5 ----------------------------------------------------------------------
7 All action functions are generated automatically, so there are only
8 two files you need to edit:
10 (1) generator/generator_actions.ml: Add your new action, parameters,
11 description, etc. to the big list at the top of this file.
13 (2) Edit/create a C file in daemon/ subdirectory which implements your
14 'do_action' function. Take a look at one of the numerous examples
18 ----------------------------------------------------------------------
20 Try to use GNU / Emacs default formatting, following the convention
21 used elsewhere in the source.
23 Please make sure that the code compiles without warnings.
25 Please test any changes.
28 make syntax-check Checks the syntax of the C code.
29 make check Runs the test suite.
31 Enable warnings, and fix any you find:
32 ./configure --enable-gcc-warnings
35 ----------------------------------------------------------------------
36 Our C source code generally adheres to some basic code-formatting
37 conventions. The existing code base is not totally consistent on this
38 front, but we do prefer that contributed code be formatted similarly.
39 In short, use spaces-not-TABs for indentation, use 2 spaces for each
40 indentation level, and other than that, follow the K&R style.
42 If you use Emacs, add the following to one of one of your start-up files
43 (e.g., ~/.emacs), to help ensure that you get indentation right:
45 ;;; In libguestfs, indent with spaces everywhere (not TABs).
46 ;;; Exceptions: Makefile and ChangeLog modes.
47 (add-hook 'find-file-hook
48 '(lambda () (if (and buffer-file-name
49 (string-match "/libguestfs\\>" (buffer-file-name))
50 (not (string-equal mode-name "Change Log"))
51 (not (string-equal mode-name "Makefile")))
52 (setq indent-tabs-mode nil))))
54 ;;; When editing C sources in libguestfs, use this style.
55 (defun libguestfs-c-mode ()
56 "C mode with adjusted defaults for use with libguestfs."
59 (setq c-indent-level 2)
60 (setq c-basic-offset 2))
61 (add-hook 'c-mode-hook
62 '(lambda () (if (string-match "/libguestfs\\>" (buffer-file-name))
63 (libguestfs-c-mode))))
66 ----------------------------------------------------------------------
69 The qemu appliance, build scripts and so on.
72 Automated tests of the C API.
75 Outside contributions, experimental parts.
78 Experimental C# bindings.
81 The daemon that runs inside the guest and carries out actions.
87 Guestfish (the command-line program / shell)
90 FUSE (userspace filesystem) built on top of libguestfs.
93 The crucially important generator, used to automatically
94 generate large amounts of boilerplate C code for things like
100 hivex/ [removed in 1.0.85]
101 This used to contain the hivex library for reading and
102 writing Windows Registry binary hive files. This is now
103 available as a separate upstream project.
106 Some guest images to test against. These are gzipped to save
107 space. You have to unzip them before use.
109 Also contains some files used by the test suite.
112 Virtual machine image inspector (virt-inspector).
118 M4 macros used by autoconf.
124 Translations of simple gettext strings. For translations of
125 longer documents, see po-docs/.
128 The build infrastructure and PO files for translations of
129 manpages and POD files. Eventually this will be combined
130 with the po/ directory, but that is rather complicated.
145 Command line tools like virt-cat, virt-df, virt-edit and more.
146 In versions <= 1.0.73 these were all in separate directories
147 like cat/, df/, edit/, but since then we moved them all into
148 one directory to simplify builds.
151 Source code to the C library.
154 Interactive qemu/kernel test tool.
157 ----------------------------------------------------------------------
159 It's a good idea to use guestfish to try out new commands.
161 Debugging the daemon is a problem because it runs inside a minimal
162 qemu environment. However you can print messages from the daemon, and
163 they will show up if you use 'guestfish -v'.
166 ----------------------------------------------------------------------
168 Submit patches to the mailing list:
169 http://www.redhat.com/mailman/listinfo/libguestfs
170 and CC to rjones@redhat.com
173 ----------------------------------------------------------------------
175 We support i18n (gettext anyhow) in the library.
177 However many messages come from the daemon, and we don't translate
178 those at the moment. One reason is that the appliance generally has
179 all locale files removed from it, because they take up a lot of space.
180 So we'd have to readd some of those, as well as copying our PO files
183 Debugging messages are never translated, since they are intended for
187 ----------------------------------------------------------------------
189 In the daemon code we have created custom printf formatters %Q and %R,
190 which are used to do shell quoting.
192 %Q => Simple shell quoted string. Any spaces or other shell characters
195 %R => Same as %Q except the string is treated as a path which is prefixed
200 asprintf (&cmd, "cat %R", path);
201 ==> "cat /sysroot/some\ path\ with\ spaces"
203 Note: Do NOT use these when you are passing parameters to the
204 command{,r,v,rv}() functions. These parameters do NOT need to be
205 quoted because they are not passed via the shell (instead, straight to
206 exec). You probably want to use the sysroot_path() function however.