1 files changed, 162 insertions, 0 deletions

diff --git a/recovery_main.cpp b/recovery_main.cpp
new file mode 100644
index 000000000..9f579f7cd
--- /dev/null
+++ b/recovery_main.cpp
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2018 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 <stdlib.h>
+#include <unistd.h>
+
+#include <chrono>
+
+#include <android-base/logging.h>
+#include <private/android_logger.h> /* private pmsg functions */
+
+#include "common.h"
+#include "minadbd/minadbd.h"
+#include "otautil/paths.h"
+#include "private/recovery.h"
+#include "rotate_logs.h"
+#include "ui.h"
+
+static void UiLogger(android::base::LogId /* id */, android::base::LogSeverity severity,
+                     const char* /* tag */, const char* /* file */, unsigned int /* line */,
+                     const char* message) {
+  static constexpr char log_characters[] = "VDIWEF";
+  if (severity >= android::base::ERROR && ui != nullptr) {
+    ui->Print("E:%s\n", message);
+  } else {
+    fprintf(stdout, "%c:%s\n", log_characters[severity], message);
+  }
+}
+
+static void redirect_stdio(const char* filename) {
+  int pipefd[2];
+  if (pipe(pipefd) == -1) {
+    PLOG(ERROR) << "pipe failed";
+
+    // Fall back to traditional logging mode without timestamps. If these fail, there's not really
+    // anywhere to complain...
+    freopen(filename, "a", stdout);
+    setbuf(stdout, nullptr);
+    freopen(filename, "a", stderr);
+    setbuf(stderr, nullptr);
+
+    return;
+  }
+
+  pid_t pid = fork();
+  if (pid == -1) {
+    PLOG(ERROR) << "fork failed";
+
+    // Fall back to traditional logging mode without timestamps. If these fail, there's not really
+    // anywhere to complain...
+    freopen(filename, "a", stdout);
+    setbuf(stdout, nullptr);
+    freopen(filename, "a", stderr);
+    setbuf(stderr, nullptr);
+
+    return;
+  }
+
+  if (pid == 0) {
+    /// Close the unused write end.
+    close(pipefd[1]);
+
+    auto start = std::chrono::steady_clock::now();
+
+    // Child logger to actually write to the log file.
+    FILE* log_fp = fopen(filename, "ae");
+    if (log_fp == nullptr) {
+      PLOG(ERROR) << "fopen \"" << filename << "\" failed";
+      close(pipefd[0]);
+      _exit(EXIT_FAILURE);
+    }
+
+    FILE* pipe_fp = fdopen(pipefd[0], "r");
+    if (pipe_fp == nullptr) {
+      PLOG(ERROR) << "fdopen failed";
+      check_and_fclose(log_fp, filename);
+      close(pipefd[0]);
+      _exit(EXIT_FAILURE);
+    }
+
+    char* line = nullptr;
+    size_t len = 0;
+    while (getline(&line, &len, pipe_fp) != -1) {
+      auto now = std::chrono::steady_clock::now();
+      double duration =
+          std::chrono::duration_cast<std::chrono::duration<double>>(now - start).count();
+      if (line[0] == '\n') {
+        fprintf(log_fp, "[%12.6lf]\n", duration);
+      } else {
+        fprintf(log_fp, "[%12.6lf] %s", duration, line);
+      }
+      fflush(log_fp);
+    }
+
+    PLOG(ERROR) << "getline failed";
+
+    free(line);
+    check_and_fclose(log_fp, filename);
+    close(pipefd[0]);
+    _exit(EXIT_FAILURE);
+  } else {
+    // Redirect stdout/stderr to the logger process. Close the unused read end.
+    close(pipefd[0]);
+
+    setbuf(stdout, nullptr);
+    setbuf(stderr, nullptr);
+
+    if (dup2(pipefd[1], STDOUT_FILENO) == -1) {
+      PLOG(ERROR) << "dup2 stdout failed";
+    }
+    if (dup2(pipefd[1], STDERR_FILENO) == -1) {
+      PLOG(ERROR) << "dup2 stderr failed";
+    }
+
+    close(pipefd[1]);
+  }
+}
+
+int main(int argc, char** argv) {
+  // We don't have logcat yet under recovery; so we'll print error on screen and log to stdout
+  // (which is redirected to recovery.log) as we used to do.
+  android::base::InitLogging(argv, &UiLogger);
+
+  // Take last pmsg contents and rewrite it to the current pmsg session.
+  static constexpr const char filter[] = "recovery/";
+  // Do we need to rotate?
+  bool do_rotate = false;
+
+  __android_log_pmsg_file_read(LOG_ID_SYSTEM, ANDROID_LOG_INFO, filter, logbasename, &do_rotate);
+  // Take action to refresh pmsg contents
+  __android_log_pmsg_file_read(LOG_ID_SYSTEM, ANDROID_LOG_INFO, filter, logrotate, &do_rotate);
+
+  // If this binary is started with the single argument "--adbd", instead of being the normal
+  // recovery binary, it turns into kind of a stripped-down version of adbd that only supports the
+  // 'sideload' command.  Note this must be a real argument, not anything in the command file or
+  // bootloader control block; the only way recovery should be run with this argument is when it
+  // starts a copy of itself from the apply_from_adb() function.
+  if (argc == 2 && strcmp(argv[1], "--adbd") == 0) {
+    minadbd_main();
+    return 0;
+  }
+
+  // redirect_stdio should be called only in non-sideload mode. Otherwise we may have two logger
+  // instances with different timestamps.
+  redirect_stdio(Paths::Get().temporary_log_file().c_str());
+
+  return start_recovery(argc, argv);
+}