Add vbmake to build super_vbmeta.img

vbmake constructs the super_vbmeta.img with given vbmeta images.

Bug: 137054296
Test: m libvbmeta_test
Test: ./out/host/linux-x86/nativetest/libvbmeta_test/libvbmeta_test
Change-Id: Ic76baa6daa1e58a22b62bdc4f25eb12c8d9004e4

2 files changed, 122 insertions, 0 deletions

diff --git a/vbmeta_tools/Android.bp b/vbmeta_tools/Android.bp
new file mode 100644
index 00000000..73a9eb7f
--- /dev/null
+++ b/vbmeta_tools/Android.bp
@@ -0,0 +1,26 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// 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.
+//
+
+cc_binary {
+    name: "vbmake",
+    host_supported: true,
+    shared_libs: [
+        "libvbmeta",
+    ],
+    srcs: [
+        "vbmake.cc",
+    ],
+}
\ No newline at end of file
diff --git a/vbmeta_tools/vbmake.cc b/vbmeta_tools/vbmake.cc
new file mode 100644
index 00000000..571b2ad2
--- /dev/null
+++ b/vbmeta_tools/vbmake.cc
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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 <getopt.h>
+#include <sysexits.h>
+
+#include <libvbmeta/libvbmeta.h>
+
+using android::fs_mgr::WriteToSuperVBMetaFile;
+
+/* Prints program usage to |where|. */
+static int usage(int /* argc */, char* argv[]) {
+    fprintf(stderr,
+            "%s - command-line tool for creating Super VBMeta Image.\n"
+            "\n"
+            "Usage:\n"
+            "  %s [options]\n"
+            "\n"
+            "Required options:\n"
+            "  -o,--output=FILE              Output file.\n"
+            "\n"
+            "Optional:\n"
+            "  -i,--image=VBMETA_NAME=FILE   include the given vbmeta file as\n"
+            "                                initial data for the super vbmeta.\n",
+            argv[0], argv[0]);
+    return EX_USAGE;
+}
+
+int main(int argc, char* argv[]) {
+    struct option options[] = {
+        { "help", no_argument, nullptr, 'h' },
+        { "image", required_argument, nullptr, 'i' },
+        { "output", required_argument, nullptr, 'o' },
+        { nullptr, 0, nullptr, 0 },
+    };
+
+    std::string output_path;
+    std::map<std::string, std::string> images;
+
+    int rv;
+    while ((rv = getopt_long_only(argc, argv, "i:o:", options, NULL)) != -1) {
+        switch (rv) {
+            case 'h':
+                return usage(argc, argv);
+            case 'i':
+            {
+                char* separator = strchr(optarg, '=');
+                if (!separator || separator == optarg || !strlen(separator + 1)) {
+                    fprintf(stderr, "Expected VBMETA_NAME=FILE.\n");
+                    return EX_USAGE;
+                }
+                *separator = '\0';
+
+                std::string vbmeta_name(optarg);
+                std::string file(separator + 1);
+                images[vbmeta_name] = file;
+                break;
+            }
+            case 'o':
+                output_path = optarg;
+                break;
+            default:
+                break;
+        }
+    }
+
+    // Check for empty arguments so we can print a more helpful message rather
+    // than error on each individual missing argument.
+    if (optind == 1) {
+        return usage(argc, argv);
+    }
+
+    if (output_path.empty()) {
+        fprintf(stderr, "--output must specify a valid path.\n");
+        return EX_USAGE;
+    }
+
+    if (!WriteToSuperVBMetaFile(output_path.c_str(), images)) {
+        return EX_CANTCREAT;
+    }
+
+    return EX_OK;
+}