2 * Copyright (C) 2009-2011 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 (* Please read generator/README first. *)
26 open Generator_docstrings
27 open Generator_api_versions
28 open Generator_optgroups
29 open Generator_actions
30 open Generator_structs
35 type optarg_proto = Dots | VA | Argv
37 (* Generate a C function prototype. *)
38 let rec generate_prototype ?(extern = true) ?(static = false)
40 ?(single_line = false) ?(indent = "") ?(newline = false)
42 ?(prefix = "") ?(suffix = "")
44 ?(optarg_proto = Dots)
45 name (ret, args, optargs) =
47 if extern then pr "extern ";
48 if static then pr "static ";
54 if single_line then pr " " else pr "\n%s" indent
57 if single_line then pr " " else pr "\n%s" indent
58 | RConstString _ | RConstOptString _ ->
60 if not single_line then pr "\n%s" indent
61 | RString _ | RBufferOut _ ->
63 if not single_line then pr "\n%s" indent
64 | RStringList _ | RHashtable _ ->
66 if not single_line then pr "\n%s" indent
68 if not in_daemon then pr "struct guestfs_%s *" typ
69 else pr "guestfs_int_%s *" typ;
70 if not single_line then pr "\n%s" indent
71 | RStructList (_, typ) ->
72 if not in_daemon then pr "struct guestfs_%s_list *" typ
73 else pr "guestfs_int_%s_list *" typ;
74 if not single_line then pr "\n%s" indent
76 let is_RBufferOut = match ret with RBufferOut _ -> true | _ -> false in
77 pr "%s%s%s (" prefix name suffix;
78 if handle = None && args = [] && optargs = [] && not is_RBufferOut then
81 let comma = ref false in
84 | Some handle -> pr "guestfs_h *%s" handle; comma := true
88 if single_line then pr ", "
90 let namelen = String.length prefix + String.length name +
91 String.length suffix + 2 in
92 pr ",\n%s%s" indent (spaces namelen)
100 | Device n | Dev_or_Path n
105 pr "const char *%s" n
106 | StringList n | DeviceList n ->
108 pr "char *const *%s" n
109 | Bool n -> next (); pr "int %s" n
110 | Int n -> next (); pr "int %s" n
111 | Int64 n -> next (); pr "int64_t %s" n
114 if not in_daemon then (next (); pr "const char *%s" n)
117 pr "const char *%s" n;
119 pr "size_t %s_size" n
124 if is_RBufferOut then (next (); pr "size_t *size_r");
125 if optargs <> [] then (
127 match optarg_proto with
129 | VA -> pr "va_list args"
130 | Argv -> pr "const struct guestfs_%s_argv *optargs" name
134 if semicolon then pr ";";
135 if newline then pr "\n"
137 (* Generate C call arguments, eg "(handle, foo, bar)" *)
138 and generate_c_call_args ?handle ?(implicit_size_ptr = "&size")
139 (ret, args, optargs) =
141 let comma = ref false in
143 if !comma then pr ", ";
148 | Some handle -> pr "%s" handle; comma := true
157 pr "%s" (name_of_argt arg)
159 (* For RBufferOut calls, add implicit size pointer parameter. *)
163 pr "%s" implicit_size_ptr
166 (* For calls with optional arguments, add implicit optargs parameter. *)
167 if optargs <> [] then (
173 (* Generate the pod documentation for the C API. *)
174 and generate_actions_pod () =
176 fun (shortname, (ret, args, optargs as style), _, flags, _, _, longdesc) ->
177 if not (List.mem NotInDocs flags) then (
178 let name = "guestfs_" ^ shortname in
179 pr "=head2 %s\n\n" name;
180 generate_prototype ~extern:false ~indent:" " ~handle:"g" name style;
183 let uc_shortname = String.uppercase shortname in
184 if optargs <> [] then (
185 pr "You may supply a list of optional arguments to this call.\n";
186 pr "Use zero or more of the following pairs of parameters,\n";
187 pr "and terminate the list with C<-1> on its own.\n";
188 pr "See L</CALLS WITH OPTIONAL ARGUMENTS>.\n\n";
191 let n = name_of_argt argt in
192 let uc_n = String.uppercase n in
193 pr " GUESTFS_%s_%s, " uc_shortname uc_n;
195 | Bool n -> pr "int %s,\n" n
196 | Int n -> pr "int %s,\n" n
197 | Int64 n -> pr "int64_t %s,\n" n
198 | String n -> pr "const char *%s,\n" n
204 pr "%s\n\n" longdesc;
205 let ret, args, optargs = style in
208 pr "This function returns 0 on success or -1 on error.\n\n"
210 pr "On error this function returns -1.\n\n"
212 pr "On error this function returns -1.\n\n"
214 pr "This function returns a C truth value on success or -1 on error.\n\n"
216 pr "This function returns a string, or NULL on error.
217 The string is owned by the guest handle and must I<not> be freed.\n\n"
218 | RConstOptString _ ->
219 pr "This function returns a string which may be NULL.
220 There is no way to return an error from this function.
221 The string is owned by the guest handle and must I<not> be freed.\n\n"
223 pr "This function returns a string, or NULL on error.
224 I<The caller must free the returned string after use>.\n\n"
226 pr "This function returns a NULL-terminated array of strings
227 (like L<environ(3)>), or NULL if there was an error.
228 I<The caller must free the strings and the array after use>.\n\n"
229 | RStruct (_, typ) ->
230 pr "This function returns a C<struct guestfs_%s *>,
231 or NULL if there was an error.
232 I<The caller must call C<guestfs_free_%s> after use>.\n\n" typ typ
233 | RStructList (_, typ) ->
234 pr "This function returns a C<struct guestfs_%s_list *>,
235 or NULL if there was an error.
236 I<The caller must call C<guestfs_free_%s_list> after use>.\n\n" typ typ
238 pr "This function returns a NULL-terminated array of
239 strings, or NULL if there was an error.
240 The array of strings will always have length C<2n+1>, where
241 C<n> keys and values alternate, followed by the trailing NULL entry.
242 I<The caller must free the strings and the array after use>.\n\n"
244 pr "This function returns a buffer, or NULL on error.
245 The size of the returned buffer is written to C<*size_r>.
246 I<The caller must free the returned buffer after use>.\n\n"
248 if List.mem Progress flags then
249 pr "%s\n\n" progress_message;
250 if List.mem ProtocolLimitWarning flags then
251 pr "%s\n\n" protocol_limit_warning;
252 if List.mem DangerWillRobinson flags then
253 pr "%s\n\n" danger_will_robinson;
254 if List.exists (function Key _ -> true | _ -> false) (args@optargs) then
255 pr "This function takes a key or passphrase parameter which
256 could contain sensitive material. Read the section
257 L</KEYS AND PASSPHRASES> for more information.\n\n";
258 (match deprecation_notice flags with
260 | Some txt -> pr "%s\n\n" txt
262 (match lookup_api_version name with
263 | Some version -> pr "(Added in %s)\n\n" version
267 (* Handling of optional argument variants. *)
268 if optargs <> [] then (
269 pr "=head2 %s_va\n\n" name;
270 generate_prototype ~extern:false ~indent:" " ~handle:"g"
271 ~prefix:"guestfs_" ~suffix:"_va" ~optarg_proto:VA
274 pr "This is the \"va_list variant\" of L</%s>.\n\n" name;
275 pr "See L</CALLS WITH OPTIONAL ARGUMENTS>.\n\n";
276 pr "=head2 %s_argv\n\n" name;
277 generate_prototype ~extern:false ~indent:" " ~handle:"g"
278 ~prefix:"guestfs_" ~suffix:"_argv" ~optarg_proto:Argv
281 pr "This is the \"argv variant\" of L</%s>.\n\n" name;
282 pr "See L</CALLS WITH OPTIONAL ARGUMENTS>.\n\n";
285 ) all_functions_sorted
287 and generate_structs_pod () =
288 (* Structs documentation. *)
291 pr "=head2 guestfs_%s\n" typ;
293 pr " struct guestfs_%s {\n" typ;
296 | name, FChar -> pr " char %s;\n" name
297 | name, FUInt32 -> pr " uint32_t %s;\n" name
298 | name, FInt32 -> pr " int32_t %s;\n" name
299 | name, (FUInt64|FBytes) -> pr " uint64_t %s;\n" name
300 | name, FInt64 -> pr " int64_t %s;\n" name
301 | name, FString -> pr " char *%s;\n" name
303 pr " /* The next two fields describe a byte array. */\n";
304 pr " uint32_t %s_len;\n" name;
305 pr " char *%s;\n" name
307 pr " /* The next field is NOT nul-terminated, be careful when printing it: */\n";
308 pr " char %s[32];\n" name
309 | name, FOptPercent ->
310 pr " /* The next field is [0..100] or -1 meaning 'not present': */\n";
311 pr " float %s;\n" name
315 pr " struct guestfs_%s_list {\n" typ;
316 pr " uint32_t len; /* Number of elements in list. */\n";
317 pr " struct guestfs_%s *val; /* Elements. */\n" typ;
320 pr " void guestfs_free_%s (struct guestfs_free_%s *);\n" typ typ;
321 pr " void guestfs_free_%s_list (struct guestfs_free_%s_list *);\n"
326 and generate_availability_pod () =
327 (* Availability documentation. *)
331 fun (group, functions) ->
332 pr "=item B<%s>\n" group;
334 pr "The following functions:\n";
335 List.iter (pr "L</guestfs_%s>\n") functions;
341 (* Generate the guestfs.h file. *)
342 and generate_guestfs_h () =
343 generate_header CStyle LGPLv2plus;
346 /* ---------- IMPORTANT NOTE ----------
348 * All API documentation is in the manpage, 'guestfs(3)'.
349 * To read it, type: man 3 guestfs
350 * Or read it online here: http://libguestfs.org/guestfs.3.html
352 * Go and read it now, I'll be right here waiting for you
353 * when you come back.
355 * ------------------------------------
370 # define GUESTFS_GCC_VERSION \\
371 (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
375 #ifndef GUESTFS_TYPEDEF_H
376 #define GUESTFS_TYPEDEF_H 1
377 typedef struct guestfs_h guestfs_h;
380 /* Connection management. */
381 extern guestfs_h *guestfs_create (void);
382 extern void guestfs_close (guestfs_h *g);
384 /* Error handling. */
385 extern const char *guestfs_last_error (guestfs_h *g);
386 #define LIBGUESTFS_HAVE_LAST_ERRNO 1
387 extern int guestfs_last_errno (guestfs_h *g);
389 #ifndef GUESTFS_TYPEDEF_ERROR_HANDLER_CB
390 #define GUESTFS_TYPEDEF_ERROR_HANDLER_CB 1
391 typedef void (*guestfs_error_handler_cb) (guestfs_h *g, void *opaque, const char *msg);
394 #ifndef GUESTFS_TYPEDEF_ABORT_CB
395 #define GUESTFS_TYPEDEF_ABORT_CB 1
396 typedef void (*guestfs_abort_cb) (void) __attribute__((__noreturn__));
399 extern void guestfs_set_error_handler (guestfs_h *g, guestfs_error_handler_cb cb, void *opaque);
400 extern guestfs_error_handler_cb guestfs_get_error_handler (guestfs_h *g, void **opaque_rtn);
402 extern void guestfs_set_out_of_memory_handler (guestfs_h *g, guestfs_abort_cb);
403 extern guestfs_abort_cb guestfs_get_out_of_memory_handler (guestfs_h *g);
409 fun (name, bitmask) ->
410 pr "#define GUESTFS_EVENT_%-16s 0x%04x\n"
411 (String.uppercase name) bitmask
413 pr "#define GUESTFS_EVENT_%-16s UINT64_MAX\n" "ALL";
417 #ifndef GUESTFS_TYPEDEF_EVENT_CALLBACK
418 #define GUESTFS_TYPEDEF_EVENT_CALLBACK 1
419 typedef void (*guestfs_event_callback) (
425 const char *buf, size_t buf_len,
426 const uint64_t *array, size_t array_len);
429 #define LIBGUESTFS_HAVE_SET_EVENT_CALLBACK 1
430 extern int guestfs_set_event_callback (guestfs_h *g,
431 guestfs_event_callback cb,
432 uint64_t event_bitmask,
435 #define LIBGUESTFS_HAVE_DELETE_EVENT_CALLBACK 1
436 extern void guestfs_delete_event_callback (guestfs_h *g, int event_handle);
438 /* Old-style event handling. In new code use guestfs_set_event_callback. */
439 #ifndef GUESTFS_TYPEDEF_LOG_MESSAGE_CB
440 #define GUESTFS_TYPEDEF_LOG_MESSAGE_CB 1
441 typedef void (*guestfs_log_message_cb) (guestfs_h *g, void *opaque, char *buf, int len);
444 #ifndef GUESTFS_TYPEDEF_SUBPROCESS_QUIT_CB
445 #define GUESTFS_TYPEDEF_SUBPROCESS_QUIT_CB 1
446 typedef void (*guestfs_subprocess_quit_cb) (guestfs_h *g, void *opaque);
449 #ifndef GUESTFS_TYPEDEF_LAUNCH_DONE_CB
450 #define GUESTFS_TYPEDEF_LAUNCH_DONE_CB 1
451 typedef void (*guestfs_launch_done_cb) (guestfs_h *g, void *opaque);
454 #ifndef GUESTFS_TYPEDEF_CLOSE_CB
455 #define GUESTFS_TYPEDEF_CLOSE_CB 1
456 typedef void (*guestfs_close_cb) (guestfs_h *g, void *opaque);
459 #ifndef GUESTFS_TYPEDEF_PROGRESS_CB
460 #define GUESTFS_TYPEDEF_PROGRESS_CB 1
461 typedef void (*guestfs_progress_cb) (guestfs_h *g, void *opaque, int proc_nr, int serial, uint64_t position, uint64_t total);
464 extern void guestfs_set_log_message_callback (guestfs_h *g, guestfs_log_message_cb cb, void *opaque);
465 extern void guestfs_set_subprocess_quit_callback (guestfs_h *g, guestfs_subprocess_quit_cb cb, void *opaque);
466 extern void guestfs_set_launch_done_callback (guestfs_h *g, guestfs_launch_done_cb cb, void *opaque);
467 #define LIBGUESTFS_HAVE_SET_CLOSE_CALLBACK 1
468 extern void guestfs_set_close_callback (guestfs_h *g, guestfs_close_cb cb, void *opaque);
469 #define LIBGUESTFS_HAVE_SET_PROGRESS_CALLBACK 1
470 extern void guestfs_set_progress_callback (guestfs_h *g, guestfs_progress_cb cb, void *opaque);
472 /* Private data area. */
473 #define LIBGUESTFS_HAVE_SET_PRIVATE 1
474 extern void guestfs_set_private (guestfs_h *g, const char *key, void *data);
475 #define LIBGUESTFS_HAVE_GET_PRIVATE 1
476 extern void *guestfs_get_private (guestfs_h *g, const char *key);
477 #define LIBGUESTFS_HAVE_FIRST_PRIVATE 1
478 extern void *guestfs_first_private (guestfs_h *g, const char **key_rtn);
479 #define LIBGUESTFS_HAVE_NEXT_PRIVATE 1
480 extern void *guestfs_next_private (guestfs_h *g, const char **key_rtn);
485 (* The structures are carefully written to have exactly the same
486 * in-memory format as the XDR structures that we use on the wire to
487 * the daemon. The reason for creating copies of these structures
488 * here is just so we don't have to export the whole of
489 * guestfs_protocol.h (which includes much unrelated and
490 * XDR-dependent stuff that we don't want to be public, or required
493 * To reiterate, we will pass these structures to and from the client
494 * with a simple assignment or memcpy, so the format must be
495 * identical to what rpcgen / the RFC defines.
498 (* Public structures. *)
501 pr "struct guestfs_%s {\n" typ;
504 | name, FChar -> pr " char %s;\n" name
505 | name, FString -> pr " char *%s;\n" name
507 pr " uint32_t %s_len;\n" name;
508 pr " char *%s;\n" name
509 | name, FUUID -> pr " char %s[32]; /* this is NOT nul-terminated, be careful when printing */\n" name
510 | name, FUInt32 -> pr " uint32_t %s;\n" name
511 | name, FInt32 -> pr " int32_t %s;\n" name
512 | name, (FUInt64|FBytes) -> pr " uint64_t %s;\n" name
513 | name, FInt64 -> pr " int64_t %s;\n" name
514 | name, FOptPercent -> pr " float %s; /* [0..100] or -1 */\n" name
518 pr "struct guestfs_%s_list {\n" typ;
519 pr " uint32_t len;\n";
520 pr " struct guestfs_%s *val;\n" typ;
523 pr "extern void guestfs_free_%s (struct guestfs_%s *);\n" typ typ;
524 pr "extern void guestfs_free_%s_list (struct guestfs_%s_list *);\n" typ typ;
533 fun (shortname, (ret, args, optargs as style), _, flags, _, _, _) ->
535 List.exists (function DeprecatedBy _ -> true | _ -> false) flags in
537 String.length shortname >= 5 && String.sub shortname 0 5 = "test0" in
539 String.length shortname >= 5 && String.sub shortname 0 5 = "debug" in
540 if not deprecated && not test0 && not debug then
541 pr "#define LIBGUESTFS_HAVE_%s 1\n" (String.uppercase shortname);
543 generate_prototype ~single_line:true ~newline:true ~handle:"g"
544 ~prefix:"guestfs_" shortname style;
546 if optargs <> [] then (
547 generate_prototype ~single_line:true ~newline:true ~handle:"g"
548 ~prefix:"guestfs_" ~suffix:"_va" ~optarg_proto:VA
551 pr "struct guestfs_%s_argv {\n" shortname;
552 pr " uint64_t bitmask;\n";
559 | Int64 n -> "int64_t "
560 | String n -> "const char *"
561 | _ -> assert false (* checked in generator_checks *) in
562 let uc_shortname = String.uppercase shortname in
563 let n = name_of_argt argt in
564 let uc_n = String.uppercase n in
565 pr "#define GUESTFS_%s_%s %d\n" uc_shortname uc_n i;
566 pr "#define GUESTFS_%s_%s_BITMASK (UINT64_C(1)<<%d)\n" uc_shortname uc_n i;
567 pr "/* The field below is only valid in this struct if the\n";
568 pr " * GUESTFS_%s_%s_BITMASK bit is set\n" uc_shortname uc_n;
569 pr " * in the bitmask above, otherwise the contents are ignored.\n";
571 pr " %s%s;\n" c_type n
575 generate_prototype ~single_line:true ~newline:true ~handle:"g"
576 ~prefix:"guestfs_" ~suffix:"_argv" ~optarg_proto:Argv
581 ) all_functions_sorted;
585 /* Private functions.
587 * These are NOT part of the public, stable API, and can change at any
588 * time! We export them because they are used by some of the language
591 extern void *guestfs_safe_malloc (guestfs_h *g, size_t nbytes);
592 extern void *guestfs_safe_calloc (guestfs_h *g, size_t n, size_t s);
593 extern const char *guestfs_tmpdir (void);
594 #ifdef GUESTFS_PRIVATE_FOR_EACH_DISK
595 extern int guestfs___for_each_disk (guestfs_h *g, virDomainPtr dom, int (*)(guestfs_h *g, const char *filename, const char *format, void *data), void *data);
597 /* End of private functions. */
603 #endif /* GUESTFS_H_ */
606 (* Generate the guestfs-internal-actions.h file. *)
607 and generate_internal_actions_h () =
608 generate_header CStyle LGPLv2plus;
610 fun (shortname, style, _, _, _, _, _) ->
611 generate_prototype ~single_line:true ~newline:true ~handle:"g"
612 ~prefix:"guestfs__" ~optarg_proto:Argv
614 ) non_daemon_functions
616 (* Generate the client-side dispatch stubs. *)
617 and generate_client_actions () =
618 generate_header CStyle LGPLv2plus;
625 #include <inttypes.h>
627 #include <sys/types.h>
628 #include <sys/stat.h>
631 #include \"guestfs.h\"
632 #include \"guestfs-internal.h\"
633 #include \"guestfs-internal-actions.h\"
634 #include \"guestfs_protocol.h\"
635 #include \"errnostring.h\"
637 /* Check the return message from a call for validity. */
639 check_reply_header (guestfs_h *g,
640 const struct guestfs_message_header *hdr,
641 unsigned int proc_nr, unsigned int serial)
643 if (hdr->prog != GUESTFS_PROGRAM) {
644 error (g, \"wrong program (%%d/%%d)\", hdr->prog, GUESTFS_PROGRAM);
647 if (hdr->vers != GUESTFS_PROTOCOL_VERSION) {
648 error (g, \"wrong protocol version (%%d/%%d)\",
649 hdr->vers, GUESTFS_PROTOCOL_VERSION);
652 if (hdr->direction != GUESTFS_DIRECTION_REPLY) {
653 error (g, \"unexpected message direction (%%d/%%d)\",
654 hdr->direction, GUESTFS_DIRECTION_REPLY);
657 if (hdr->proc != proc_nr) {
658 error (g, \"unexpected procedure number (%%d/%%d)\", hdr->proc, proc_nr);
661 if (hdr->serial != serial) {
662 error (g, \"unexpected serial (%%d/%%d)\", hdr->serial, serial);
669 /* Check we are in the right state to run a high-level action. */
671 check_state (guestfs_h *g, const char *caller)
673 if (!guestfs__is_ready (g)) {
674 if (guestfs__is_config (g) || guestfs__is_launching (g))
675 error (g, \"%%s: call launch before using this function\\n(in guestfish, don't forget to use the 'run' command)\",
678 error (g, \"%%s called from the wrong state, %%d != READY\",
679 caller, guestfs__get_state (g));
685 /* Convenience wrapper for tracing. */
687 trace_open (guestfs_h *g)
689 assert (g->trace_fp == NULL);
692 g->trace_fp = open_memstream (&g->trace_buf, &g->trace_len);
700 trace_send_line (guestfs_h *g)
706 fclose (g->trace_fp);
709 /* The callback might invoke other libguestfs calls, so keep
710 * a copy of the pointer to the buffer and length.
715 guestfs___call_callbacks_message (g, GUESTFS_EVENT_TRACE, buf, len);
723 (* Generate code to check String-like parameters are not passed in
724 * as NULL (returning an error if they are).
726 let check_null_strings shortname (ret, args, optargs) =
727 let pr_newline = ref false in
730 (* parameters which should not be NULL *)
742 pr " if (%s == NULL) {\n" n;
743 pr " error (g, \"%%s: %%s: parameter cannot be NULL\",\n";
744 pr " \"%s\", \"%s\");\n" shortname n;
746 match errcode_of_ret ret with
747 | `CannotReturnError ->
748 if shortname = "test0rconstoptstring" then (* XXX hack *)
752 "%s: RConstOptString function has invalid parameter '%s'"
754 | (`ErrorIsMinusOne |`ErrorIsNULL) as e -> e in
755 pr " return %s;\n" (string_of_errcode errcode);
768 (* For optional arguments. *)
772 pr " if ((optargs->bitmask & GUESTFS_%s_%s_BITMASK) &&\n"
773 (String.uppercase shortname) (String.uppercase n);
774 pr " optargs->%s == NULL) {\n" n;
775 pr " error (g, \"%%s: %%s: optional parameter cannot be NULL\",\n";
776 pr " \"%s\", \"%s\");\n" shortname n;
778 match errcode_of_ret ret with
779 | `CannotReturnError -> assert false
780 | (`ErrorIsMinusOne |`ErrorIsNULL) as e -> e in
781 pr " return %s;\n" (string_of_errcode errcode);
786 | Bool _ | Int _ | Int64 _ -> ()
791 if !pr_newline then pr "\n";
794 (* Generate code to reject optargs we don't know about. *)
795 let reject_unknown_optargs shortname = function
798 let len = List.length optargs in
799 let mask = Int64.lognot (Int64.pred (Int64.shift_left 1L len)) in
800 pr " if (optargs->bitmask & UINT64_C(0x%Lx)) {\n" mask;
801 pr " error (g, \"%%s: unknown option in guestfs_%%s_argv->bitmask (this can happen if a program is compiled against a newer version of libguestfs, then dynamically linked to an older version)\",\n";
802 pr " \"%s\", \"%s\");\n" shortname shortname;
804 match errcode_of_ret ret with
805 | `CannotReturnError -> assert false
806 | (`ErrorIsMinusOne |`ErrorIsNULL) as e -> e in
807 pr " return %s;\n" (string_of_errcode errcode);
812 (* Generate code to generate guestfish call traces. *)
813 let trace_call shortname (ret, args, optargs) =
814 pr " if (trace_flag) {\n";
817 List.exists (function
818 | StringList _ | DeviceList _ -> true
819 | _ -> false) args in
825 pr " trace_fp = trace_open (g);\n";
827 pr " fprintf (trace_fp, \"%%s\", \"%s\");\n" shortname;
829 (* Required arguments. *)
832 | String n (* strings *)
838 (* guestfish doesn't support string escaping, so neither do we *)
839 pr " fprintf (trace_fp, \" \\\"%%s\\\"\", %s);\n" n
841 (* don't print keys *)
842 pr " fprintf (trace_fp, \" \\\"***\\\"\");\n"
843 | OptString n -> (* string option *)
844 pr " if (%s) fprintf (trace_fp, \" \\\"%%s\\\"\", %s);\n" n n;
845 pr " else fprintf (trace_fp, \" null\");\n"
847 | DeviceList n -> (* string list *)
848 pr " fputc (' ', trace_fp);\n";
849 pr " fputc ('\"', trace_fp);\n";
850 pr " for (i = 0; %s[i]; ++i) {\n" n;
851 pr " if (i > 0) fputc (' ', trace_fp);\n";
852 pr " fputs (%s[i], trace_fp);\n" n;
854 pr " fputc ('\"', trace_fp);\n";
855 | Bool n -> (* boolean *)
856 pr " fputs (%s ? \" true\" : \" false\", trace_fp);\n" n
858 pr " fprintf (trace_fp, \" %%d\", %s);\n" n
860 pr " fprintf (trace_fp, \" %%\" PRIi64, %s);\n" n
861 | BufferIn n -> (* RHBZ#646822 *)
862 pr " fputc (' ', trace_fp);\n";
863 pr " guestfs___print_BufferIn (trace_fp, %s, %s_size);\n" n n
865 pr " fprintf (trace_fp, \" (%s)%%p\", %s);\n" t n
868 (* Optional arguments. *)
871 let n = name_of_argt argt in
872 let uc_shortname = String.uppercase shortname in
873 let uc_n = String.uppercase n in
874 pr " if (optargs->bitmask & GUESTFS_%s_%s_BITMASK)\n"
878 pr " fprintf (trace_fp, \" \\\"%%s:%%s\\\"\", \"%s\", optargs->%s);\n" n n
880 pr " fprintf (trace_fp, \" \\\"%%s:%%s\\\"\", \"%s\", optargs->%s ? \"true\" : \"false\");\n" n n
882 pr " fprintf (trace_fp, \" \\\"%%s:%%d\\\"\", \"%s\", optargs->%s);\n" n n
884 pr " fprintf (trace_fp, \" \\\"%%s:%%\" PRIi64 \"\\\"\", \"%s\", optargs->%s);\n" n n
889 pr " trace_send_line (g);\n";
894 let trace_return ?(indent = 2) shortname (ret, _, _) rv =
895 let indent = spaces indent in
897 pr "%sif (trace_flag) {\n" indent;
901 | RStringList _ | RHashtable _ -> true
904 pr "%s size_t i;\n" indent;
908 pr "%s trace_fp = trace_open (g);\n" indent;
910 pr "%s fprintf (trace_fp, \"%%s = \", \"%s\");\n" indent shortname;
913 | RErr | RInt _ | RBool _ ->
914 pr "%s fprintf (trace_fp, \"%%d\", %s);\n" indent rv
916 pr "%s fprintf (trace_fp, \"%%\" PRIi64, %s);\n" indent rv
917 | RConstString _ | RString _ ->
918 pr "%s fprintf (trace_fp, \"\\\"%%s\\\"\", %s);\n" indent rv
919 | RConstOptString _ ->
920 pr "%s fprintf (trace_fp, \"\\\"%%s\\\"\", %s != NULL ? %s : \"NULL\");\n"
923 pr "%s guestfs___print_BufferOut (trace_fp, %s, *size_r);\n" indent rv
924 | RStringList _ | RHashtable _ ->
925 pr "%s fputs (\"[\", trace_fp);\n" indent;
926 pr "%s for (i = 0; %s[i]; ++i) {\n" indent rv;
927 pr "%s if (i > 0) fputs (\", \", trace_fp);\n" indent;
928 pr "%s fputs (\"\\\"\", trace_fp);\n" indent;
929 pr "%s fputs (%s[i], trace_fp);\n" indent rv;
930 pr "%s fputs (\"\\\"\", trace_fp);\n" indent;
932 pr "%s fputs (\"]\", trace_fp);\n" indent;
933 | RStruct (_, typ) ->
934 (* XXX There is code generated for guestfish for printing
935 * these structures. We need to make it generally available
938 pr "%s fprintf (trace_fp, \"<struct guestfs_%s *>\");\n"
940 | RStructList (_, typ) ->
941 pr "%s fprintf (trace_fp, \"<struct guestfs_%s_list *>\");\n"
944 pr "%s trace_send_line (g);\n" indent;
949 let trace_return_error ?(indent = 2) shortname (ret, _, _) errcode =
950 let indent = spaces indent in
952 pr "%sif (trace_flag)\n" indent;
954 pr "%s guestfs___trace (g, \"%%s = %%s (error)\",\n" indent;
955 pr "%s \"%s\", \"%s\");\n"
956 indent shortname (string_of_errcode errcode)
959 (* For non-daemon functions, generate a wrapper around each function. *)
961 fun (shortname, (ret, _, optargs as style), _, _, _, _, _) ->
963 generate_prototype ~extern:false ~semicolon:false ~newline:true
964 ~handle:"g" ~prefix:"guestfs_"
967 generate_prototype ~extern:false ~semicolon:false ~newline:true
968 ~handle:"g" ~prefix:"guestfs_" ~suffix:"_argv" ~optarg_proto:Argv
971 pr " int trace_flag = g->trace;\n";
972 pr " FILE *trace_fp;\n";
974 | RErr | RInt _ | RBool _ ->
979 pr " const char *r;\n"
980 | RConstOptString _ ->
981 pr " const char *r;\n"
982 | RString _ | RBufferOut _ ->
984 | RStringList _ | RHashtable _ ->
986 | RStruct (_, typ) ->
987 pr " struct guestfs_%s *r;\n" typ
988 | RStructList (_, typ) ->
989 pr " struct guestfs_%s_list *r;\n" typ
992 check_null_strings shortname style;
993 reject_unknown_optargs shortname style;
994 trace_call shortname style;
995 pr " r = guestfs__%s " shortname;
996 generate_c_call_args ~handle:"g" ~implicit_size_ptr:"size_r" style;
999 (match errcode_of_ret ret with
1000 | (`ErrorIsMinusOne | `ErrorIsNULL) as errcode ->
1001 pr " if (r != %s) {\n" (string_of_errcode errcode);
1002 trace_return ~indent:4 shortname style "r";
1004 trace_return_error ~indent:4 shortname style errcode;
1006 | `CannotReturnError ->
1007 trace_return shortname style "r";
1013 ) non_daemon_functions;
1015 (* Client-side stubs for each function. *)
1017 fun (shortname, (ret, args, optargs as style), _, _, _, _, _) ->
1018 let name = "guestfs_" ^ shortname in
1020 match errcode_of_ret ret with
1021 | `CannotReturnError -> assert false
1022 | (`ErrorIsMinusOne | `ErrorIsNULL) as e -> e in
1024 (* Generate the action stub. *)
1025 if optargs = [] then
1026 generate_prototype ~extern:false ~semicolon:false ~newline:true
1027 ~handle:"g" ~prefix:"guestfs_" shortname style
1029 generate_prototype ~extern:false ~semicolon:false ~newline:true
1030 ~handle:"g" ~prefix:"guestfs_" ~suffix:"_argv"
1031 ~optarg_proto:Argv shortname style;
1037 | _ -> pr " struct %s_args args;\n" name
1040 pr " guestfs_message_header hdr;\n";
1041 pr " guestfs_message_error err;\n";
1045 | RConstString _ | RConstOptString _ ->
1046 failwithf "RConstString|RConstOptString cannot be used by daemon functions"
1048 | RBool _ | RString _ | RStringList _
1049 | RStruct _ | RStructList _
1050 | RHashtable _ | RBufferOut _ ->
1051 pr " struct %s_ret ret;\n" name;
1054 pr " int serial;\n";
1056 pr " int trace_flag = g->trace;\n";
1057 pr " FILE *trace_fp;\n";
1059 | RErr | RInt _ | RBool _ ->
1062 pr " int64_t ret_v;\n"
1063 | RConstString _ | RConstOptString _ ->
1064 pr " const char *ret_v;\n"
1065 | RString _ | RBufferOut _ ->
1066 pr " char *ret_v;\n"
1067 | RStringList _ | RHashtable _ ->
1068 pr " char **ret_v;\n"
1069 | RStruct (_, typ) ->
1070 pr " struct guestfs_%s *ret_v;\n" typ
1071 | RStructList (_, typ) ->
1072 pr " struct guestfs_%s_list *ret_v;\n" typ
1076 List.exists (function FileIn _ -> true | _ -> false) args in
1077 if has_filein then (
1078 pr " uint64_t progress_hint = 0;\n";
1079 pr " struct stat progress_stat;\n";
1081 pr " const uint64_t progress_hint = 0;\n";
1084 check_null_strings shortname style;
1085 reject_unknown_optargs shortname style;
1086 trace_call shortname style;
1088 (* Calculate the total size of all FileIn arguments to pass
1089 * as a progress bar hint.
1094 pr " if (stat (%s, &progress_stat) == 0 &&\n" n;
1095 pr " S_ISREG (progress_stat.st_mode))\n";
1096 pr " progress_hint += progress_stat.st_size;\n";
1101 (* Check we are in the right state for sending a request. *)
1102 pr " if (check_state (g, \"%s\") == -1) {\n" shortname;
1103 trace_return_error ~indent:4 shortname style errcode;
1104 pr " return %s;\n" (string_of_errcode errcode);
1106 pr " guestfs___set_busy (g);\n";
1109 (* Send the main header and arguments. *)
1110 if args = [] && optargs = [] then (
1111 pr " serial = guestfs___send (g, GUESTFS_PROC_%s, progress_hint, 0,\n"
1112 (String.uppercase shortname);
1113 pr " NULL, NULL);\n"
1117 | Pathname n | Device n | Dev_or_Path n | String n | Key n ->
1118 pr " args.%s = (char *) %s;\n" n n
1120 pr " args.%s = %s ? (char **) &%s : NULL;\n" n n n
1121 | StringList n | DeviceList n ->
1122 pr " args.%s.%s_val = (char **) %s;\n" n n n;
1123 pr " for (args.%s.%s_len = 0; %s[args.%s.%s_len]; args.%s.%s_len++) ;\n" n n n n n n n;
1125 pr " args.%s = %s;\n" n n
1127 pr " args.%s = %s;\n" n n
1129 pr " args.%s = %s;\n" n n
1130 | FileIn _ | FileOut _ -> ()
1132 pr " /* Just catch grossly large sizes. XDR encoding will make this precise. */\n";
1133 pr " if (%s_size >= GUESTFS_MESSAGE_MAX) {\n" n;
1134 trace_return_error ~indent:4 shortname style errcode;
1135 pr " error (g, \"%%s: size of input buffer too large\", \"%s\");\n"
1137 pr " guestfs___end_busy (g);\n";
1138 pr " return %s;\n" (string_of_errcode errcode);
1140 pr " args.%s.%s_val = (char *) %s;\n" n n n;
1141 pr " args.%s.%s_len = %s_size;\n" n n n
1142 | Pointer _ -> assert false
1147 let n = name_of_argt argt in
1148 let uc_shortname = String.uppercase shortname in
1149 let uc_n = String.uppercase n in
1150 pr " if ((optargs->bitmask & GUESTFS_%s_%s_BITMASK))\n"
1156 pr " args.%s = optargs->%s;\n" n n;
1158 pr " args.%s = 0;\n" n
1160 pr " args.%s = (char *) optargs->%s;\n" n n;
1162 pr " args.%s = (char *) \"\";\n" n
1167 pr " serial = guestfs___send (g, GUESTFS_PROC_%s,\n"
1168 (String.uppercase shortname);
1169 pr " progress_hint, %s,\n"
1170 (if optargs <> [] then "optargs->bitmask" else "0");
1171 pr " (xdrproc_t) xdr_%s_args, (char *) &args);\n"
1174 pr " if (serial == -1) {\n";
1175 pr " guestfs___end_busy (g);\n";
1176 trace_return_error ~indent:4 shortname style errcode;
1177 pr " return %s;\n" (string_of_errcode errcode);
1181 (* Send any additional files (FileIn) requested. *)
1182 let need_read_reply_label = ref false in
1186 pr " r = guestfs___send_file (g, %s);\n" n;
1187 pr " if (r == -1) {\n";
1188 pr " guestfs___end_busy (g);\n";
1189 trace_return_error ~indent:4 shortname style errcode;
1190 pr " /* daemon will send an error reply which we discard */\n";
1191 pr " guestfs___recv_discard (g, \"%s\");\n" shortname;
1192 pr " return %s;\n" (string_of_errcode errcode);
1194 pr " if (r == -2) /* daemon cancelled */\n";
1195 pr " goto read_reply;\n";
1196 need_read_reply_label := true;
1201 (* Wait for the reply from the remote end. *)
1202 if !need_read_reply_label then pr " read_reply:\n";
1203 pr " memset (&hdr, 0, sizeof hdr);\n";
1204 pr " memset (&err, 0, sizeof err);\n";
1205 if has_ret then pr " memset (&ret, 0, sizeof ret);\n";
1207 pr " r = guestfs___recv (g, \"%s\", &hdr, &err,\n " shortname;
1211 pr "(xdrproc_t) xdr_guestfs_%s_ret, (char *) &ret" shortname;
1214 pr " if (r == -1) {\n";
1215 pr " guestfs___end_busy (g);\n";
1216 trace_return_error ~indent:4 shortname style errcode;
1217 pr " return %s;\n" (string_of_errcode errcode);
1221 pr " if (check_reply_header (g, &hdr, GUESTFS_PROC_%s, serial) == -1) {\n"
1222 (String.uppercase shortname);
1223 pr " guestfs___end_busy (g);\n";
1224 trace_return_error ~indent:4 shortname style errcode;
1225 pr " return %s;\n" (string_of_errcode errcode);
1229 pr " if (hdr.status == GUESTFS_STATUS_ERROR) {\n";
1230 trace_return_error ~indent:4 shortname style errcode;
1231 pr " int errnum = 0;\n";
1232 pr " if (err.errno_string[0] != '\\0')\n";
1233 pr " errnum = guestfs___string_to_errno (err.errno_string);\n";
1234 pr " if (errnum <= 0)\n";
1235 pr " error (g, \"%%s: %%s\", \"%s\", err.error_message);\n"
1238 pr " guestfs_error_errno (g, errnum, \"%%s: %%s\", \"%s\",\n"
1240 pr " err.error_message);\n";
1241 pr " free (err.error_message);\n";
1242 pr " free (err.errno_string);\n";
1243 pr " guestfs___end_busy (g);\n";
1244 pr " return %s;\n" (string_of_errcode errcode);
1248 (* Expecting to receive further files (FileOut)? *)
1252 pr " if (guestfs___recv_file (g, %s) == -1) {\n" n;
1253 pr " guestfs___end_busy (g);\n";
1254 trace_return_error ~indent:4 shortname style errcode;
1255 pr " return %s;\n" (string_of_errcode errcode);
1261 pr " guestfs___end_busy (g);\n";
1266 | RInt n | RInt64 n | RBool n ->
1267 pr " ret_v = ret.%s;\n" n
1268 | RConstString _ | RConstOptString _ ->
1269 failwithf "RConstString|RConstOptString cannot be used by daemon functions"
1271 pr " ret_v = ret.%s; /* caller will free */\n" n
1272 | RStringList n | RHashtable n ->
1273 pr " /* caller will free this, but we need to add a NULL entry */\n";
1274 pr " ret.%s.%s_val =\n" n n;
1275 pr " safe_realloc (g, ret.%s.%s_val,\n" n n;
1276 pr " sizeof (char *) * (ret.%s.%s_len + 1));\n"
1278 pr " ret.%s.%s_val[ret.%s.%s_len] = NULL;\n" n n n n;
1279 pr " ret_v = ret.%s.%s_val;\n" n n
1281 pr " /* caller will free this */\n";
1282 pr " ret_v = safe_memdup (g, &ret.%s, sizeof (ret.%s));\n" n n
1283 | RStructList (n, _) ->
1284 pr " /* caller will free this */\n";
1285 pr " ret_v = safe_memdup (g, &ret.%s, sizeof (ret.%s));\n" n n
1287 pr " /* RBufferOut is tricky: If the buffer is zero-length, then\n";
1288 pr " * _val might be NULL here. To make the API saner for\n";
1289 pr " * callers, we turn this case into a unique pointer (using\n";
1290 pr " * malloc(1)).\n";
1292 pr " if (ret.%s.%s_len > 0) {\n" n n;
1293 pr " *size_r = ret.%s.%s_len;\n" n n;
1294 pr " ret_v = ret.%s.%s_val; /* caller will free */\n" n n;
1296 pr " free (ret.%s.%s_val);\n" n n;
1297 pr " char *p = safe_malloc (g, 1);\n";
1298 pr " *size_r = ret.%s.%s_len;\n" n n;
1302 trace_return shortname style "ret_v";
1303 pr " return ret_v;\n";
1307 (* Functions to free structures. *)
1308 pr "/* Structure-freeing functions. These rely on the fact that the\n";
1309 pr " * structure format is identical to the XDR format. See note in\n";
1310 pr " * generator.ml.\n";
1317 pr "guestfs_free_%s (struct guestfs_%s *x)\n" typ typ;
1319 pr " xdr_free ((xdrproc_t) xdr_guestfs_int_%s, (char *) x);\n" typ;
1325 pr "guestfs_free_%s_list (struct guestfs_%s_list *x)\n" typ typ;
1327 pr " xdr_free ((xdrproc_t) xdr_guestfs_int_%s_list, (char *) x);\n" typ;
1334 (* Functions which have optional arguments have two generated variants. *)
1337 | shortname, (ret, args, (_::_ as optargs) as style), _, _, _, _, _ ->
1338 let uc_shortname = String.uppercase shortname in
1340 (* Get the name of the last regular argument. *)
1343 | RBufferOut _ -> "size_r"
1347 | args -> name_of_argt (List.hd (List.rev args)) in
1351 | RErr | RInt _ | RBool _ -> "int "
1352 | RInt64 _ -> "int64_t "
1353 | RConstString _ | RConstOptString _ -> "const char *"
1354 | RString _ | RBufferOut _ -> "char *"
1355 | RStringList _ | RHashtable _ -> "char **"
1356 | RStruct (_, typ) -> sprintf "struct guestfs_%s *" typ
1357 | RStructList (_, typ) ->
1358 sprintf "struct guestfs_%s_list *" typ in
1360 (* The regular variable args function, just calls the _va variant. *)
1361 generate_prototype ~extern:false ~semicolon:false ~newline:true
1362 ~handle:"g" ~prefix:"guestfs_" shortname style;
1364 pr " va_list optargs;\n";
1366 pr " va_start (optargs, %s);\n" last_arg;
1367 pr " %sr = guestfs_%s_va " rtype shortname;
1368 generate_c_call_args ~handle:"g" ~implicit_size_ptr:"size_r" style;
1370 pr " va_end (optargs);\n";
1375 generate_prototype ~extern:false ~semicolon:false ~newline:true
1376 ~handle:"g" ~prefix:"guestfs_" ~suffix:"_va" ~optarg_proto:VA
1379 pr " struct guestfs_%s_argv optargs_s;\n" shortname;
1380 pr " struct guestfs_%s_argv *optargs = &optargs_s;\n" shortname;
1383 pr " optargs_s.bitmask = 0;\n";
1385 pr " while ((i = va_arg (args, int)) >= 0) {\n";
1386 pr " switch (i) {\n";
1390 let n = name_of_argt argt in
1391 let uc_n = String.uppercase n in
1392 pr " case GUESTFS_%s_%s:\n" uc_shortname uc_n;
1393 pr " optargs_s.%s = va_arg (args, " n;
1395 | Bool _ | Int _ -> pr "int"
1396 | Int64 _ -> pr "int64_t"
1397 | String _ -> pr "const char *"
1405 match errcode_of_ret ret with
1406 | `CannotReturnError -> assert false
1407 | (`ErrorIsMinusOne | `ErrorIsNULL) as e -> e in
1410 pr " error (g, \"%%s: unknown option %%d (this can happen if a program is compiled against a newer version of libguestfs, then dynamically linked to an older version)\",\n";
1411 pr " \"%s\", i);\n" shortname;
1412 pr " return %s;\n" (string_of_errcode errcode);
1415 pr " uint64_t i_mask = UINT64_C(1) << i;\n";
1416 pr " if (optargs_s.bitmask & i_mask) {\n";
1417 pr " error (g, \"%%s: same optional argument specified more than once\",\n";
1418 pr " \"%s\");\n" shortname;
1419 pr " return %s;\n" (string_of_errcode errcode);
1421 pr " optargs_s.bitmask |= i_mask;\n";
1424 pr " return guestfs_%s_argv " shortname;
1425 generate_c_call_args ~handle:"g" ~implicit_size_ptr:"size_r" style;
1429 ) all_functions_sorted
1431 (* Generate the linker script which controls the visibility of
1432 * symbols in the public ABI and ensures no other symbols get
1433 * exported accidentally.
1435 and generate_linker_script () =
1436 generate_header HashStyle GPLv2plus;
1441 "guestfs_delete_event_callback";
1442 "guestfs_first_private";
1443 "guestfs_get_error_handler";
1444 "guestfs_get_out_of_memory_handler";
1445 "guestfs_get_private";
1446 "guestfs_last_errno";
1447 "guestfs_last_error";
1448 "guestfs_next_private";
1449 "guestfs_set_close_callback";
1450 "guestfs_set_error_handler";
1451 "guestfs_set_event_callback";
1452 "guestfs_set_launch_done_callback";
1453 "guestfs_set_log_message_callback";
1454 "guestfs_set_out_of_memory_handler";
1455 "guestfs_set_private";
1456 "guestfs_set_progress_callback";
1457 "guestfs_set_subprocess_quit_callback";
1459 (* Unofficial parts of the API: the bindings code use these
1460 * functions, so it is useful to export them.
1462 "guestfs_safe_calloc";
1463 "guestfs_safe_malloc";
1464 "guestfs_safe_strdup";
1465 "guestfs_safe_memdup";
1467 "guestfs___for_each_disk";
1473 | name, (_, _, []), _, _, _, _, _ -> ["guestfs_" ^ name]
1474 | name, (_, _, _), _, _, _, _, _ ->
1476 "guestfs_" ^ name ^ "_va";
1477 "guestfs_" ^ name ^ "_argv"]
1482 List.map (fun (typ, _) ->
1483 ["guestfs_free_" ^ typ; "guestfs_free_" ^ typ ^ "_list"])
1486 let globals = List.sort compare (globals @ functions @ structs) in
1490 List.iter (pr " %s;\n") globals;
1497 and generate_max_proc_nr () =
1498 pr "%d\n" max_proc_nr