X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=src%2Fgenerator.ml;h=71aeeed84f7c8fb4e29b4a8412e5ce08dd4f00ef;hp=32537df734c7d9b2db5592005658df143f792dae;hb=f04ee08806ec7bd313e9d54f48f2eb911fcb3067;hpb=13432f02ca29eecaa61c8d66c7c52f9b70b2b3be diff --git a/src/generator.ml b/src/generator.ml index 32537df..71aeeed 100755 --- a/src/generator.ml +++ b/src/generator.ml @@ -805,6 +805,32 @@ is passed to the appliance at boot time. See C. For more information on the architecture of libguestfs, see L."); + ("set_trace", (RErr, [Bool "trace"]), -1, [FishAlias "trace"], + [InitNone, Always, TestOutputTrue ( + [["set_trace"; "true"]; + ["get_trace"]])], + "enable or disable command traces", + "\ +If the command trace flag is set to 1, then commands are +printed on stdout before they are executed in a format +which is very similar to the one used by guestfish. In +other words, you can run a program with this enabled, and +you will get out a script which you can feed to guestfish +to perform the same set of actions. + +If you want to trace C API calls into libguestfs (and +other libraries) then possibly a better way is to use +the external ltrace(1) command. + +Command traces are disabled unless the environment variable +C is defined and set to C<1>."); + + ("get_trace", (RBool "trace", []), -1, [], + [], + "get command trace enabled flag", + "\ +Return the command trace flag."); + ] (* daemon_functions are any functions which cause some action @@ -4561,6 +4587,16 @@ and generate_actions_h () = name style ) all_functions +(* Generate the guestfs-internal-actions.h file. *) +and generate_internal_actions_h () = + generate_header CStyle LGPLv2; + List.iter ( + fun (shortname, style, _, _, _, _, _) -> + let name = "guestfs__" ^ shortname in + generate_prototype ~single_line:true ~newline:true ~handle:"handle" + name style + ) non_daemon_functions + (* Generate the client-side dispatch stubs. *) and generate_client_actions () = generate_header CStyle LGPLv2; @@ -4570,6 +4606,7 @@ and generate_client_actions () = #include #include \"guestfs.h\" +#include \"guestfs-internal-actions.h\" #include \"guestfs_protocol.h\" #define error guestfs_error @@ -4632,6 +4669,68 @@ check_state (guestfs_h *g, const char *caller) "; + (* Generate code to generate guestfish call traces. *) + let trace_call shortname style = + pr " if (guestfs__get_trace (g)) {\n"; + + let needs_i = + List.exists (function + | StringList _ | DeviceList _ -> true + | _ -> false) (snd style) in + if needs_i then ( + pr " int i;\n"; + pr "\n" + ); + + pr " printf (\"%s\");\n" shortname; + List.iter ( + function + | String n (* strings *) + | Device n + | Pathname n + | Dev_or_Path n + | FileIn n + | FileOut n -> + (* guestfish doesn't support string escaping, so neither do we *) + pr " printf (\" \\\"%%s\\\"\", %s);\n" n + | OptString n -> (* string option *) + pr " if (%s) printf (\" \\\"%%s\\\"\", %s);\n" n n; + pr " else printf (\" null\");\n" + | StringList n + | DeviceList n -> (* string list *) + pr " putchar (' ');\n"; + pr " putchar ('\"');\n"; + pr " for (i = 0; %s[i]; ++i) {\n" n; + pr " if (i > 0) putchar (' ');\n"; + pr " fputs (%s[i], stdout);\n" n; + pr " }\n"; + pr " putchar ('\"');\n"; + | Bool n -> (* boolean *) + pr " fputs (%s ? \" true\" : \" false\", stdout);\n" n + | Int n -> (* int *) + pr " printf (\" %%d\", %s);\n" n + ) (snd style); + pr " putchar ('\\n');\n"; + pr " }\n"; + pr "\n"; + in + + (* For non-daemon functions, generate a wrapper around each function. *) + List.iter ( + fun (shortname, style, _, _, _, _, _) -> + let name = "guestfs_" ^ shortname in + + generate_prototype ~extern:false ~semicolon:false ~newline:true + ~handle:"g" name style; + pr "{\n"; + trace_call shortname style; + pr " return guestfs__%s " shortname; + generate_c_call_args ~handle:"g" style; + pr ";\n"; + pr "}\n"; + pr "\n" + ) non_daemon_functions; + (* Client-side stubs for each function. *) List.iter ( fun (shortname, style, _, _, _, _, _) -> @@ -4732,6 +4831,7 @@ check_state (guestfs_h *g, const char *caller) pr " guestfs_main_loop *ml = guestfs_get_main_loop (g);\n"; pr " int serial;\n"; pr "\n"; + trace_call shortname style; pr " if (check_state (g, \"%s\") == -1) return %s;\n" name error_code; pr " guestfs_set_busy (g);\n"; pr "\n"; @@ -9111,6 +9211,7 @@ and generate_bindtests () = #include #include \"guestfs.h\" +#include \"guestfs-internal-actions.h\" #include \"guestfs_protocol.h\" #define error guestfs_error @@ -9141,7 +9242,7 @@ print_strings (char *const *argv) let () = let (name, style, _, _, _, _, _) = test0 in generate_prototype ~extern:false ~semicolon:false ~newline:true - ~handle:"g" ~prefix:"guestfs_" name style; + ~handle:"g" ~prefix:"guestfs__" name style; pr "{\n"; List.iter ( function @@ -9166,7 +9267,7 @@ print_strings (char *const *argv) if String.sub name (String.length name - 3) 3 <> "err" then ( pr "/* Test normal return. */\n"; generate_prototype ~extern:false ~semicolon:false ~newline:true - ~handle:"g" ~prefix:"guestfs_" name style; + ~handle:"g" ~prefix:"guestfs__" name style; pr "{\n"; (match fst style with | RErr -> @@ -9232,7 +9333,7 @@ print_strings (char *const *argv) ) else ( pr "/* Test error return. */\n"; generate_prototype ~extern:false ~semicolon:false ~newline:true - ~handle:"g" ~prefix:"guestfs_" name style; + ~handle:"g" ~prefix:"guestfs__" name style; pr "{\n"; pr " error (g, \"error\");\n"; (match fst style with @@ -9555,6 +9656,10 @@ Run it from the top source directory using the command generate_actions_h (); close (); + let close = output_to "src/guestfs-internal-actions.h" in + generate_internal_actions_h (); + close (); + let close = output_to "src/guestfs-actions.c" in generate_client_actions (); close ();