From 1124fb525bf7b8341170d886b8de070e20323efd Mon Sep 17 00:00:00 2001 From: wolfbeast Date: Sun, 13 May 2018 22:46:04 +0200 Subject: Remove other gonk widget conditionals and unused files. Tag #288. --- .../mozapps/update/updater/automounter_gonk.cpp | 251 --------------------- 1 file changed, 251 deletions(-) delete mode 100644 toolkit/mozapps/update/updater/automounter_gonk.cpp (limited to 'toolkit/mozapps/update/updater/automounter_gonk.cpp') diff --git a/toolkit/mozapps/update/updater/automounter_gonk.cpp b/toolkit/mozapps/update/updater/automounter_gonk.cpp deleted file mode 100644 index 3dff2a133..000000000 --- a/toolkit/mozapps/update/updater/automounter_gonk.cpp +++ /dev/null @@ -1,251 +0,0 @@ -/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ -/* vim:set ts=2 sw=2 sts=2 et cindent: */ -/* This Source Code Form is subject to the terms of the Mozilla Public - * License, v. 2.0. If a copy of the MPL was not distributed with this - * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "automounter_gonk.h" -#include "updatedefines.h" -#include "updatelogging.h" - -#define LOG_TAG "GonkAutoMounter" - -#define GONK_LOG(level, format, ...) \ - LOG((LOG_TAG ": " format "\n", ##__VA_ARGS__)); \ - __android_log_print(level, LOG_TAG, format, ##__VA_ARGS__) - -#define LOGI(format, ...) GONK_LOG(ANDROID_LOG_INFO, format, ##__VA_ARGS__) -#define LOGE(format, ...) GONK_LOG(ANDROID_LOG_ERROR, format, ##__VA_ARGS__) - -const char *kGonkMountsPath = "/proc/mounts"; -const char *kGonkSystemPath = "/system"; - -GonkAutoMounter::GonkAutoMounter() : mDevice(nullptr), mAccess(Unknown) -{ - if (!RemountSystem(ReadWrite)) { - LOGE("Could not remount %s as read-write.", kGonkSystemPath); - } -} - -GonkAutoMounter::~GonkAutoMounter() -{ - bool result = RemountSystem(ReadOnly); - free(mDevice); - - if (!result) { - // Don't take any chances when remounting as read-only fails, just reboot. - Reboot(); - } -} - -void -GonkAutoMounter::Reboot() -{ - // The android_reboot wrapper provides more safety, doing fancier read-only - // remounting and attempting to sync() the filesystem first. If this fails - // our only hope is to force a reboot directly without these protections. - // For more, see system/core/libcutils/android_reboot.c - LOGE("Could not remount %s as read-only, forcing a system reboot.", - kGonkSystemPath); - LogFlush(); - - if (android_reboot(ANDROID_RB_RESTART, 0, nullptr) != 0) { - LOGE("Safe system reboot failed, attempting to force"); - LogFlush(); - - if (reboot(RB_AUTOBOOT) != 0) { - LOGE("CRITICAL: Failed to force restart"); - } - } -} - -static const char * -MountAccessToString(MountAccess access) -{ - switch (access) { - case ReadOnly: return "read-only"; - case ReadWrite: return "read-write"; - default: return "unknown"; - } -} - -bool -GonkAutoMounter::RemountSystem(MountAccess access) -{ - if (!UpdateMountStatus()) { - return false; - } - - if (mAccess == access) { - return true; - } - - unsigned long flags = MS_REMOUNT; - if (access == ReadOnly) { - flags |= MS_RDONLY; - // Give the system a chance to flush file buffers - sync(); - } - - if (!MountSystem(flags)) { - return false; - } - - // Check status again to verify /system has been properly remounted - if (!UpdateMountStatus()) { - return false; - } - - if (mAccess != access) { - LOGE("Updated mount status %s should be %s", - MountAccessToString(mAccess), - MountAccessToString(access)); - return false; - } - - return true; -} - -bool -GonkAutoMounter::UpdateMountStatus() -{ - FILE *mountsFile = NS_tfopen(kGonkMountsPath, "r"); - - if (mountsFile == nullptr) { - LOGE("Error opening %s: %s", kGonkMountsPath, strerror(errno)); - return false; - } - - // /proc/mounts returns a 0 size from fstat, so we use the same - // pre-allocated buffer size that ADB does here - const int mountsMaxSize = 4096; - char mountData[mountsMaxSize]; - size_t read = fread(mountData, 1, mountsMaxSize - 1, mountsFile); - mountData[read + 1] = '\0'; - - if (ferror(mountsFile)) { - LOGE("Error reading %s, %s", kGonkMountsPath, strerror(errno)); - fclose(mountsFile); - return false; - } - - char *token, *tokenContext; - bool foundSystem = false; - - for (token = strtok_r(mountData, "\n", &tokenContext); - token; - token = strtok_r(nullptr, "\n", &tokenContext)) - { - if (ProcessMount(token)) { - foundSystem = true; - break; - } - } - - fclose(mountsFile); - - if (!foundSystem) { - LOGE("Couldn't find %s mount in %s", kGonkSystemPath, kGonkMountsPath); - } - return foundSystem; -} - -bool -GonkAutoMounter::ProcessMount(const char *mount) -{ - const int strSize = 256; - char mountDev[strSize]; - char mountDir[strSize]; - char mountAccess[strSize]; - - int rv = sscanf(mount, "%255s %255s %*s %255s %*d %*d\n", - mountDev, mountDir, mountAccess); - mountDev[strSize - 1] = '\0'; - mountDir[strSize - 1] = '\0'; - mountAccess[strSize - 1] = '\0'; - - if (rv != 3) { - return false; - } - - if (strcmp(kGonkSystemPath, mountDir) != 0) { - return false; - } - - free(mDevice); - mDevice = strdup(mountDev); - mAccess = Unknown; - - char *option, *optionContext; - for (option = strtok_r(mountAccess, ",", &optionContext); - option; - option = strtok_r(nullptr, ",", &optionContext)) - { - if (strcmp("ro", option) == 0) { - mAccess = ReadOnly; - break; - } else if (strcmp("rw", option) == 0) { - mAccess = ReadWrite; - break; - } - } - - return true; -} - -/* - * Mark the given block device as read-write or read-only, using the BLKROSET - * ioctl. - */ -static void SetBlockReadWriteStatus(const char *blockdev, bool setReadOnly) { - int fd; - int roMode = setReadOnly ? 1 : 0; - - fd = open(blockdev, O_RDONLY); - if (fd < 0) { - return; - } - - if (ioctl(fd, BLKROSET, &roMode) == -1) { - LOGE("Error setting read-only mode on %s to %s: %s", blockdev, - setReadOnly ? "true": "false", strerror(errno)); - } - close(fd); -} - - -bool -GonkAutoMounter::MountSystem(unsigned long flags) -{ - if (!mDevice) { - LOGE("No device was found for %s", kGonkSystemPath); - return false; - } - - // Without setting the block device ro mode to false, we get a permission - // denied error while trying to remount it in read-write. - SetBlockReadWriteStatus(mDevice, (flags & MS_RDONLY)); - - const char *readOnly = flags & MS_RDONLY ? "read-only" : "read-write"; - int result = mount(mDevice, kGonkSystemPath, "none", flags, nullptr); - - if (result != 0) { - LOGE("Error mounting %s as %s: %s", kGonkSystemPath, readOnly, - strerror(errno)); - return false; - } - - LOGI("Mounted %s partition as %s", kGonkSystemPath, readOnly); - return true; -} -- cgit v1.2.3