112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include "edify/expr.h"
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#include "updater.h"
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#include "install.h"
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#include "minzip/Zip.h"
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// Where in the package we expect to find the edify script to execute.
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// (Note it's "updateR-script", not the older "update-script".)
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#define SCRIPT_NAME "META-INF/com/google/android/updater-script"
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int main(int argc, char** argv) {
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if (argc != 4) {
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fprintf(stderr, "unexpected number of arguments (%d)\n", argc);
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return 1;
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}
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char* version = argv[1];
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if (version[0] != '1' || version[1] != '\0') {
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fprintf(stderr, "wrong updater binary API; expected 1, got %s\n",
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version);
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return 2;
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}
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// Set up the pipe for sending commands back to the parent process.
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int fd = atoi(argv[2]);
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FILE* cmd_pipe = fdopen(fd, "wb");
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setlinebuf(cmd_pipe);
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// Extract the script from the package.
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char* package_data = argv[3];
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ZipArchive za;
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int err;
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err = mzOpenZipArchive(package_data, &za);
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if (err != 0) {
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fprintf(stderr, "failed to open package %s: %s\n",
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package_data, strerror(err));
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return 3;
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}
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const ZipEntry* script_entry = mzFindZipEntry(&za, SCRIPT_NAME);
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if (script_entry == NULL) {
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fprintf(stderr, "failed to find %s in %s\n", SCRIPT_NAME, package_data);
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return 4;
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}
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char* script = malloc(script_entry->uncompLen+1);
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if (!mzReadZipEntry(&za, script_entry, script, script_entry->uncompLen)) {
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fprintf(stderr, "failed to read script from package\n");
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return 5;
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}
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script[script_entry->uncompLen] = '\0';
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// Configure edify's functions.
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RegisterBuiltins();
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RegisterInstallFunctions();
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FinishRegistration();
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// Parse the script.
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Expr* root;
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yy_scan_string(script);
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int error = yyparse(&root);
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if (error != 0) {
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fprintf(stderr, "%d parse errors\n", error);
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return 6;
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}
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// Evaluate the parsed script.
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UpdaterInfo updater_info;
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updater_info.cmd_pipe = cmd_pipe;
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updater_info.package_zip = &za;
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char* result = Evaluate(&updater_info, root);
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if (result == NULL) {
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const char* errmsg = GetError();
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fprintf(stderr, "script aborted with error: %s\n",
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errmsg == NULL ? "(none)" : errmsg);
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ClearError();
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return 7;
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} else {
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fprintf(stderr, "script result was [%s]\n", result);
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free(result);
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}
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mzCloseZipArchive(&za);
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return 0;
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}
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