(* Generate server-side stubs. *)
pr "static void %s_stub (XDR *xdr_in)\n" name;
pr "{\n";
- let error_code =
- match ret with
- | RErr | RInt _ -> pr " int r;\n"; "-1"
- | RInt64 _ -> pr " int64_t r;\n"; "-1"
- | RBool _ -> pr " int r;\n"; "-1"
- | RConstString _ | RConstOptString _ ->
- failwithf "RConstString|RConstOptString cannot be used by daemon functions"
- | RString _ -> pr " char *r;\n"; "NULL"
- | RStringList _ | RHashtable _ -> pr " char **r;\n"; "NULL"
- | RStruct (_, typ) -> pr " guestfs_int_%s *r;\n" typ; "NULL"
- | RStructList (_, typ) -> pr " guestfs_int_%s_list *r;\n" typ; "NULL"
- | RBufferOut _ ->
- pr " size_t size = 1;\n";
- pr " char *r;\n";
- "NULL" in
+ (match ret with
+ | RErr | RInt _ -> pr " int r;\n"
+ | RInt64 _ -> pr " int64_t r;\n"
+ | RBool _ -> pr " int r;\n"
+ | RConstString _ | RConstOptString _ ->
+ failwithf "RConstString|RConstOptString cannot be used by daemon functions"
+ | RString _ -> pr " char *r;\n"
+ | RStringList _ | RHashtable _ -> pr " char **r;\n"
+ | RStruct (_, typ) -> pr " guestfs_int_%s *r;\n" typ
+ | RStructList (_, typ) -> pr " guestfs_int_%s_list *r;\n" typ
+ | RBufferOut _ ->
+ pr " size_t size = 1;\n";
+ pr " char *r;\n"
+ );
if args <> [] || optargs <> [] then (
pr " struct guestfs_%s_args args;\n" name;
let is_filein =
List.exists (function FileIn _ -> true | _ -> false) args in
- (* Reject unknown optional arguments. *)
+ (* Reject unknown optional arguments.
+ * Note this code is included even for calls with no optional
+ * args because the caller must not pass optargs_bitmask != 0
+ * in that case.
+ *)
if optargs <> [] then (
let len = List.length optargs in
let mask = Int64.lognot (Int64.pred (Int64.shift_left 1L len)) in
pr " if (optargs_bitmask & UINT64_C(0x%Lx)) {\n" mask;
if is_filein then
- pr " if (cancel_receive () != -2)\n";
+ pr " cancel_receive ();\n";
pr " reply_with_error (\"unknown option in optional arguments bitmask (this can happen if a program is compiled against a newer version of libguestfs, then run against an older version of the daemon)\");\n";
pr " goto done;\n";
pr " }\n";
- pr "\n"
+ ) else (
+ pr " if (optargs_bitmask != 0) {\n";
+ if is_filein then
+ pr " cancel_receive ();\n";
+ pr " reply_with_error (\"header optargs_bitmask field must be passed as 0 for calls that don't take optional arguments\");\n";
+ pr " goto done;\n";
+ pr " }\n";
);
+ pr "\n";
(* Decode arguments. *)
if args <> [] || optargs <> [] then (
pr "\n";
pr " if (!xdr_guestfs_%s_args (xdr_in, &args)) {\n" name;
if is_filein then
- pr " if (cancel_receive () != -2)\n";
- pr " reply_with_error (\"daemon failed to decode procedure arguments\");\n";
+ pr " cancel_receive ();\n";
+ pr " reply_with_error (\"daemon failed to decode procedure arguments\");\n";
pr " goto done;\n";
pr " }\n";
let pr_args n =
pr " sizeof (char *) * (args.%s.%s_len+1));\n" n n;
pr " if (%s == NULL) {\n" n;
if is_filein then
- pr " if (cancel_receive () != -2)\n";
- pr " reply_with_perror (\"realloc\");\n";
+ pr " cancel_receive ();\n";
+ pr " reply_with_perror (\"realloc\");\n";
pr " goto done;\n";
pr " }\n";
pr " %s[args.%s.%s_len] = NULL;\n" n n n;
| Pathname n ->
pr_args n;
pr " ABS_PATH (%s, %s, goto done);\n"
- n (if is_filein then "cancel_receive ()" else "0");
+ n (if is_filein then "cancel_receive ()" else "");
| Device n ->
pr_args n;
pr " RESOLVE_DEVICE (%s, %s, goto done);\n"
- n (if is_filein then "cancel_receive ()" else "0");
+ n (if is_filein then "cancel_receive ()" else "");
| Dev_or_Path n ->
pr_args n;
pr " REQUIRE_ROOT_OR_RESOLVE_DEVICE (%s, %s, goto done);\n"
- n (if is_filein then "cancel_receive ()" else "0");
+ n (if is_filein then "cancel_receive ()" else "");
| String n | Key n -> pr_args n
| OptString n -> pr " %s = args.%s ? *args.%s : NULL;\n" n n n
| StringList n ->
pr " size_t i;\n";
pr " for (i = 0; %s[i] != NULL; ++i)\n" n;
pr " RESOLVE_DEVICE (%s[i], %s, goto done);\n" n
- (if is_filein then "cancel_receive ()" else "0");
+ (if is_filein then "cancel_receive ()" else "");
pr " }\n";
| Bool n -> pr " %s = args.%s;\n" n n
| Int n -> pr " %s = args.%s;\n" n n
(* Emit NEED_ROOT just once, even when there are two or
more Pathname args *)
pr " NEED_ROOT (%s, goto done);\n"
- (if is_filein then "cancel_receive ()" else "0");
+ (if is_filein then "cancel_receive ()" else "");
);
(* Don't want to call the impl with any FileIn or FileOut
pr ";\n" in
(match ret with
+ | RConstOptString _ -> assert false
| RErr | RInt _ | RInt64 _ | RBool _
- | RConstString _ | RConstOptString _
+ | RConstString _
| RString _ | RStringList _ | RHashtable _
| RStruct (_, _) | RStructList (_, _) ->
- pr " if (r == %s)\n" error_code;
+ let errcode =
+ match errcode_of_ret ret with
+ | `CannotReturnError -> assert false
+ | (`ErrorIsMinusOne | `ErrorIsNULL) as e -> e in
+ pr " if (r == %s)\n" (string_of_errcode errcode);
pr " /* do_%s has already called reply_with_error */\n" name;
pr " goto done;\n";
pr "\n"
pr " /* size == 0 && r == NULL could be a non-error case (just\n";
pr " * an ordinary zero-length buffer), so be careful ...\n";
pr " */\n";
- pr " if (size == 1 && r == %s)\n" error_code;
+ pr " if (size == 1 && r == NULL)\n";
pr " /* do_%s has already called reply_with_error */\n" name;
pr " goto done;\n";
pr "\n"
git.annexia.org / libguestfs.git / blobdiff