Hex decode add-prefix and remove-prefix for fdbrestore.

fdbbackup/CMakeLists.txt

@@ -1,5 +1,6 @@
 set(FDBBACKUP_SRCS
 	BackupTLSConfig.cpp
+	Decode.cpp
 	backup.actor.cpp)
 
 add_flow_target(EXECUTABLE NAME fdbbackup SRCS ${FDBBACKUP_SRCS})
@@ -13,6 +14,7 @@ target_include_directories(fdbconvert PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/inclu
 target_link_libraries(fdbconvert PRIVATE fdbclient)
 
 set(FDBDECODE_SRCS
+	Decode.cpp
 	BackupTLSConfig.cpp
 	FileDecoder.actor.cpp)
 add_flow_target(EXECUTABLE NAME fdbdecode SRCS ${FDBDECODE_SRCS})

fdbbackup/Decode.cpp

@@ -0,0 +1,78 @@
+/*
+ * Decode.cpp
+ *
+ * This source file is part of the FoundationDB open source project
+ *
+ * Copyright 2013-2024 Apple Inc. and the FoundationDB project authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "fdbbackup/Decode.h"
+
+#include <iostream>
+
+// Decode an ASCII string, e.g., "\x15\x1b\x19\x04\xaf\x0c\x28\x0a",
+// into the binary string. Set "err" to true if the format is invalid.
+// Note ',' '\' '," ';' are escaped by '\'. Normal characters can be
+// unencoded into HEX, but not recommended.
+std::string decode_hex_string(std::string line, bool& err) {
+	size_t i = 0;
+	std::string ret;
+
+	while (i <= line.length()) {
+		switch (line[i]) {
+		case '\\':
+			if (i + 2 > line.length()) {
+				std::cerr << "Invalid hex string at: " << i << "\n";
+				err = true;
+				return ret;
+			}
+			switch (line[i + 1]) {
+				char ent, save;
+			case '"':
+			case '\\':
+			case ' ':
+			case ';':
+				line.erase(i, 1);
+				break;
+			case 'x':
+				if (i + 4 > line.length()) {
+					std::cerr << "Invalid hex string at: " << i << "\n";
+					err = true;
+					return ret;
+				}
+				char* pEnd;
+				save = line[i + 4];
+				line[i + 4] = 0;
+				ent = char(strtoul(line.data() + i + 2, &pEnd, 16));
+				if (*pEnd) {
+					std::cerr << "Invalid hex string at: " << i << "\n";
+					err = true;
+					return ret;
+				}
+				line[i + 4] = save;
+				line.replace(i, 4, 1, ent);
+				break;
+			default:
+				std::cerr << "Invalid hex string at: " << i << "\n";
+				err = true;
+				return ret;
+			}
+		default:
+			i++;
+		}
+	}
+
+	return line.substr(0, i);
+}

fdbbackup/FileConverter.actor.cpp

@@ -621,4 +621,4 @@ int main(int argc, char** argv) {
 		TraceEvent(SevError, "MainError").error(unknown_error()).detail("RootException", e.what());
 		return FDB_EXIT_MAIN_EXCEPTION;
 	}
-}
+}

fdbbackup/FileDecoder.actor.cpp

@@ -34,6 +34,7 @@
 #include "fdbbackup/BackupTLSConfig.h"
 #include "fdbclient/BuildFlags.h"
 #include "fdbbackup/FileConverter.h"
+#include "fdbbackup/Decode.h"
 #include "fdbclient/BackupAgent.actor.h"
 #include "fdbclient/BackupContainer.h"
 #include "fdbclient/BackupContainerFileSystem.h"
@@ -247,60 +248,6 @@ struct DecodeParams : public ReferenceCounted<DecodeParams> {
 	}
 };
 
-// Decode an ASCII string, e.g., "\x15\x1b\x19\x04\xaf\x0c\x28\x0a",
-// into the binary string. Set "err" to true if the format is invalid.
-// Note ',' '\' '," ';' are escaped by '\'. Normal characters can be
-// unencoded into HEX, but not recommended.
-std::string decode_hex_string(std::string line, bool& err) {
-	size_t i = 0;
-	std::string ret;
-
-	while (i <= line.length()) {
-		switch (line[i]) {
-		case '\\':
-			if (i + 2 > line.length()) {
-				std::cerr << "Invalid hex string at: " << i << "\n";
-				err = true;
-				return ret;
-			}
-			switch (line[i + 1]) {
-				char ent, save;
-			case '"':
-			case '\\':
-			case ' ':
-			case ';':
-				line.erase(i, 1);
-				break;
-			case 'x':
-				if (i + 4 > line.length()) {
-					std::cerr << "Invalid hex string at: " << i << "\n";
-					err = true;
-					return ret;
-				}
-				char* pEnd;
-				save = line[i + 4];
-				line[i + 4] = 0;
-				ent = char(strtoul(line.data() + i + 2, &pEnd, 16));
-				if (*pEnd) {
-					std::cerr << "Invalid hex string at: " << i << "\n";
-					return ret;
-				}
-				line[i + 4] = save;
-				line.replace(i, 4, 1, ent);
-				break;
-			default:
-				std::cerr << "Invalid hex string at: " << i << "\n";
-				err = true;
-				return ret;
-			}
-		default:
-			i++;
-		}
-	}
-
-	return line.substr(0, i);
-}
-
 // Parses and returns a ";" separated HEX encoded strings. So the ";" in
 // the string should be escaped as "\;".
 // Sets "err" to true if there is any parsing error.

fdbbackup/backup.actor.cpp

@@ -21,6 +21,7 @@
 #include "flow/ApiVersion.h"
 #include "fmt/format.h"
 #include "fdbbackup/BackupTLSConfig.h"
+#include "fdbbackup/Decode.h"
 #include "fdbclient/JsonBuilder.h"
 #include "flow/Arena.h"
 #include "flow/ArgParseUtil.h"
@@ -3825,12 +3826,26 @@ int main(int argc, char* argv[]) {
 			case OPT_DESCRIBE_TIMESTAMPS:
 				describeTimestamps = true;
 				break;
-			case OPT_PREFIX_ADD:
-				addPrefix = args->OptionArg();
+			case OPT_PREFIX_ADD: {
+				bool err = false;
+				addPrefix = decode_hex_string(args->OptionArg(), err);
+				if (err) {
+					fprintf(stderr, "ERROR: Could not parse add prefix\n");
+					printHelpTeaser(argv[0]);
+					return FDB_EXIT_ERROR;
+				}
 				break;
-			case OPT_PREFIX_REMOVE:
-				removePrefix = args->OptionArg();
+			}
+			case OPT_PREFIX_REMOVE: {
+				bool err = false;
+				removePrefix = decode_hex_string(args->OptionArg(), err);
+				if (err) {
+					fprintf(stderr, "ERROR: Could not parse remove prefix\n");
+					printHelpTeaser(argv[0]);
+					return FDB_EXIT_ERROR;
+				}
 				break;
+			}
 			case OPT_ERRORLIMIT: {
 				const char* a = args->OptionArg();
 				if (!sscanf(a, "%d", &maxErrors)) {

fdbbackup/include/fdbbackup/Decode.h

@@ -0,0 +1,29 @@
+/*
+ * Decode.h
+ *
+ * This source file is part of the FoundationDB open source project
+ *
+ * Copyright 2013-2024 Apple Inc. and the FoundationDB project authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FDBBACKUP_DECODE_H
+#define FDBBACKUP_DECODE_H
+#pragma once
+
+#include <string>
+
+std::string decode_hex_string(std::string line, bool& err);
+
+#endif // FDBBACKUP_DECODE_H