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Diffstat (limited to '')
-rw-r--r-- | updater/updater.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/updater/updater.c b/updater/updater.c new file mode 100644 index 000000000..aa03803a8 --- /dev/null +++ b/updater/updater.c @@ -0,0 +1,111 @@ +/* + * Copyright (C) 2009 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 <stdio.h> +#include <unistd.h> +#include <stdlib.h> + +#include "edify/expr.h" +#include "updater.h" +#include "install.h" +#include "minzip/Zip.h" + +// Where in the package we expect to find the edify script to execute. +// (Note it's "updateR-script", not the older "update-script".) +#define SCRIPT_NAME "META-INF/com/google/android/updater-script" + +int main(int argc, char** argv) { + if (argc != 4) { + fprintf(stderr, "unexpected number of arguments (%d)\n", argc); + return 1; + } + + char* version = argv[1]; + if (version[0] != '1' || version[1] != '\0') { + fprintf(stderr, "wrong updater binary API; expected 1, got %s\n", + version); + return 2; + } + + // Set up the pipe for sending commands back to the parent process. + + int fd = atoi(argv[2]); + FILE* cmd_pipe = fdopen(fd, "wb"); + setlinebuf(cmd_pipe); + + // Extract the script from the package. + + char* package_data = argv[3]; + ZipArchive za; + int err; + err = mzOpenZipArchive(package_data, &za); + if (err != 0) { + fprintf(stderr, "failed to open package %s: %s\n", + package_data, strerror(err)); + return 3; + } + + const ZipEntry* script_entry = mzFindZipEntry(&za, SCRIPT_NAME); + if (script_entry == NULL) { + fprintf(stderr, "failed to find %s in %s\n", SCRIPT_NAME, package_data); + return 4; + } + + char* script = malloc(script_entry->uncompLen+1); + if (!mzReadZipEntry(&za, script_entry, script, script_entry->uncompLen)) { + fprintf(stderr, "failed to read script from package\n"); + return 5; + } + script[script_entry->uncompLen] = '\0'; + + // Configure edify's functions. + + RegisterBuiltins(); + RegisterInstallFunctions(); + FinishRegistration(); + + // Parse the script. + + Expr* root; + yy_scan_string(script); + int error = yyparse(&root); + if (error != 0) { + fprintf(stderr, "%d parse errors\n", error); + return 6; + } + + // Evaluate the parsed script. + + UpdaterInfo updater_info; + updater_info.cmd_pipe = cmd_pipe; + updater_info.package_zip = &za; + + char* result = Evaluate(&updater_info, root); + if (result == NULL) { + const char* errmsg = GetError(); + fprintf(stderr, "script aborted with error: %s\n", + errmsg == NULL ? "(none)" : errmsg); + ClearError(); + return 7; + } else { + fprintf(stderr, "script result was [%s]\n", result); + free(result); + } + + mzCloseZipArchive(&za); + + return 0; +} |