recovery: Clean up get_args().
Test: Boot into new recovery image, verify the parsed parameters.
Change-Id: Ieefafb26cc4147ce4cb9ced4297cdb3b5d1d3789
diff --git a/recovery.cpp b/recovery.cpp
index 02d460e..5f16075 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -186,9 +186,6 @@
* 9. main() calls reboot() to boot main system
*/
-static const int MAX_ARG_LENGTH = 4096;
-static const int MAX_ARGS = 100;
-
// open a given path, mounting partitions as necessary
FILE* fopen_path(const char *path, const char *mode) {
if (ensure_path_mounted(path) != 0) {
@@ -310,79 +307,68 @@
// - the actual command line
// - the bootloader control block (one per line, after "recovery")
// - the contents of COMMAND_FILE (one per line)
-static void
-get_args(int *argc, char ***argv) {
- bootloader_message boot = {};
- std::string err;
- if (!read_bootloader_message(&boot, &err)) {
- LOG(ERROR) << err;
- // If fails, leave a zeroed bootloader_message.
- memset(&boot, 0, sizeof(boot));
- }
- stage = strndup(boot.stage, sizeof(boot.stage));
+static std::vector<std::string> get_args(const int argc, char** const argv) {
+ CHECK_GT(argc, 0);
- if (boot.command[0] != 0) {
- std::string boot_command = std::string(boot.command, sizeof(boot.command));
- LOG(INFO) << "Boot command: " << boot_command;
- }
+ bootloader_message boot = {};
+ std::string err;
+ if (!read_bootloader_message(&boot, &err)) {
+ LOG(ERROR) << err;
+ // If fails, leave a zeroed bootloader_message.
+ boot = {};
+ }
+ stage = strndup(boot.stage, sizeof(boot.stage));
- if (boot.status[0] != 0) {
- std::string boot_status = std::string(boot.status, sizeof(boot.status));
- LOG(INFO) << "Boot status: " << boot_status;
- }
+ if (boot.command[0] != 0) {
+ std::string boot_command = std::string(boot.command, sizeof(boot.command));
+ LOG(INFO) << "Boot command: " << boot_command;
+ }
- // --- if arguments weren't supplied, look in the bootloader control block
- if (*argc <= 1) {
- boot.recovery[sizeof(boot.recovery) - 1] = '\0'; // Ensure termination
- const char *arg = strtok(boot.recovery, "\n");
- if (arg != NULL && !strcmp(arg, "recovery")) {
- *argv = (char **) malloc(sizeof(char *) * MAX_ARGS);
- (*argv)[0] = strdup(arg);
- for (*argc = 1; *argc < MAX_ARGS; ++*argc) {
- if ((arg = strtok(NULL, "\n")) == NULL) break;
- (*argv)[*argc] = strdup(arg);
- }
- LOG(INFO) << "Got arguments from boot message";
- } else if (boot.recovery[0] != 0) {
- std::string boot_recovery = std::string(boot.recovery, 20);
- LOG(ERROR) << "Bad boot message\n" << "\"" <<boot_recovery << "\"";
- }
- }
+ if (boot.status[0] != 0) {
+ std::string boot_status = std::string(boot.status, sizeof(boot.status));
+ LOG(INFO) << "Boot status: " << boot_status;
+ }
- // --- if that doesn't work, try the command file (if we have /cache).
- if (*argc <= 1 && has_cache) {
- FILE *fp = fopen_path(COMMAND_FILE, "r");
- if (fp != NULL) {
- char *token;
- char *argv0 = (*argv)[0];
- *argv = (char **) malloc(sizeof(char *) * MAX_ARGS);
- (*argv)[0] = argv0; // use the same program name
+ std::vector<std::string> args(argv, argv + argc);
- char buf[MAX_ARG_LENGTH];
- for (*argc = 1; *argc < MAX_ARGS; ++*argc) {
- if (!fgets(buf, sizeof(buf), fp)) break;
- token = strtok(buf, "\r\n");
- if (token != NULL) {
- (*argv)[*argc] = strdup(token); // Strip newline.
- } else {
- --*argc;
- }
- }
+ // --- if arguments weren't supplied, look in the bootloader control block
+ if (argc == 1) {
+ boot.recovery[sizeof(boot.recovery) - 1] = '\0'; // Ensure termination
+ std::string boot_recovery(boot.recovery);
+ std::vector<std::string> tokens = android::base::Split(boot_recovery, "\n");
+ if (!tokens.empty() && tokens[0] == "recovery") {
+ for (auto it = tokens.begin() + 1; it != tokens.end(); it++) {
+ // Skip empty and '\0'-filled tokens.
+ if (!it->empty() && (*it)[0] != '\0') args.push_back(std::move(*it));
+ }
+ LOG(INFO) << "Got " << args.size() << " arguments from boot message";
+ } else if (boot.recovery[0] != 0) {
+ LOG(ERROR) << "Bad boot message: \"" << boot_recovery << "\"";
+ }
+ }
- check_and_fclose(fp, COMMAND_FILE);
- LOG(INFO) << "Got arguments from " << COMMAND_FILE;
- }
+ // --- if that doesn't work, try the command file (if we have /cache).
+ if (argc == 1 && has_cache) {
+ std::string content;
+ if (android::base::ReadFileToString(COMMAND_FILE, &content)) {
+ std::vector<std::string> tokens = android::base::Split(content, "\n");
+ for (auto it = tokens.begin() + 1; it != tokens.end(); it++) {
+ // Skip empty and '\0'-filled tokens.
+ if (!it->empty() && (*it)[0] != '\0') args.push_back(std::move(*it));
+ }
+ LOG(INFO) << "Got " << args.size() << " arguments from " << COMMAND_FILE;
}
+ }
- // --> write the arguments we have back into the bootloader control block
- // always boot into recovery after this (until finish_recovery() is called)
- std::vector<std::string> options;
- for (int i = 1; i < *argc; ++i) {
- options.push_back((*argv)[i]);
- }
- if (!write_bootloader_message(options, &err)) {
- LOG(ERROR) << err;
- }
+ // Write the arguments (excluding the filename in args[0]) back into the
+ // bootloader control block. So the device will always boot into recovery to
+ // finish the pending work, until finish_recovery() is called.
+ std::vector<std::string> options(args.cbegin() + 1, args.cend());
+ if (!write_bootloader_message(options, &err)) {
+ LOG(ERROR) << err;
+ }
+
+ return args;
}
static void
@@ -1430,7 +1416,10 @@
load_volume_table();
has_cache = volume_for_path(CACHE_ROOT) != nullptr;
- get_args(&argc, &argv);
+ std::vector<std::string> args = get_args(argc, argv);
+ std::vector<char*> args_to_parse(args.size());
+ std::transform(args.cbegin(), args.cend(), args_to_parse.begin(),
+ [](const std::string& arg) { return const_cast<char*>(arg.c_str()); });
const char *update_package = NULL;
bool should_wipe_data = false;
@@ -1447,7 +1436,8 @@
int arg;
int option_index;
- while ((arg = getopt_long(argc, argv, "", OPTIONS, &option_index)) != -1) {
+ while ((arg = getopt_long(args_to_parse.size(), args_to_parse.data(), "", OPTIONS,
+ &option_index)) != -1) {
switch (arg) {
case 'n': android::base::ParseInt(optarg, &retry_count, 0); break;
case 'u': update_package = optarg; break;
@@ -1529,8 +1519,8 @@
device->StartRecovery();
printf("Command:");
- for (arg = 0; arg < argc; arg++) {
- printf(" \"%s\"", argv[arg]);
+ for (const auto& arg : args) {
+ printf(" \"%s\"", arg.c_str());
}
printf("\n");