diff options
Diffstat (limited to '')
| -rw-r--r-- | error_code.h | 2 | ||||
| -rw-r--r-- | otautil/DirUtil.cpp | 200 | ||||
| -rw-r--r-- | otautil/DirUtil.h | 38 | ||||
| -rw-r--r-- | recovery.cpp | 26 | ||||
| -rw-r--r-- | roots.cpp | 250 | ||||
| -rw-r--r-- | tests/unit/dirutil_test.cpp | 32 | ||||
| -rw-r--r-- | uncrypt/uncrypt.cpp | 12 |
7 files changed, 248 insertions, 312 deletions
diff --git a/error_code.h b/error_code.h index 9fe047c91..4cbad4cfe 100644 --- a/error_code.h +++ b/error_code.h @@ -68,6 +68,8 @@ enum UncryptErrorCode { kUncryptFileCloseError, kUncryptFileRenameError, kUncryptPackageMissingError, + kUncryptRealpathFindError, + kUncryptBlockDeviceFindError, }; #endif // _ERROR_CODE_H_ diff --git a/otautil/DirUtil.cpp b/otautil/DirUtil.cpp index ad344dedf..fffc82219 100644 --- a/otautil/DirUtil.cpp +++ b/otautil/DirUtil.cpp @@ -16,147 +16,101 @@ #include "DirUtil.h" +#include <dirent.h> +#include <errno.h> #include <stdlib.h> -#include <string.h> -#include <stdio.h> -#include <sys/types.h> #include <sys/stat.h> +#include <sys/types.h> #include <unistd.h> -#include <errno.h> -#include <dirent.h> -#include <limits.h> #include <string> #include <selinux/label.h> #include <selinux/selinux.h> -typedef enum { DMISSING, DDIR, DILLEGAL } DirStatus; - -static DirStatus -getPathDirStatus(const char *path) -{ - struct stat st; - int err; +enum class DirStatus { DMISSING, DDIR, DILLEGAL }; - err = stat(path, &st); - if (err == 0) { - /* Something's there; make sure it's a directory. - */ - if (S_ISDIR(st.st_mode)) { - return DDIR; - } - errno = ENOTDIR; - return DILLEGAL; - } else if (errno != ENOENT) { - /* Something went wrong, or something in the path - * is bad. Can't do anything in this situation. - */ - return DILLEGAL; +static DirStatus dir_status(const std::string& path) { + struct stat sb; + if (stat(path.c_str(), &sb) == 0) { + // Something's there; make sure it's a directory. + if (S_ISDIR(sb.st_mode)) { + return DirStatus::DDIR; } - return DMISSING; + errno = ENOTDIR; + return DirStatus::DILLEGAL; + } else if (errno != ENOENT) { + // Something went wrong, or something in the path is bad. Can't do anything in this situation. + return DirStatus::DILLEGAL; + } + return DirStatus::DMISSING; } -int -dirCreateHierarchy(const char *path, int mode, - const struct utimbuf *timestamp, bool stripFileName, - struct selabel_handle *sehnd) -{ - DirStatus ds; - - /* Check for an empty string before we bother - * making any syscalls. - */ - if (path[0] == '\0') { - errno = ENOENT; - return -1; +int mkdir_recursively(const std::string& input_path, mode_t mode, bool strip_filename, + const selabel_handle* sehnd) { + // Check for an empty string before we bother making any syscalls. + if (input_path.empty()) { + errno = ENOENT; + return -1; + } + + // Allocate a path that we can modify; stick a slash on the end to make things easier. + std::string path = input_path; + if (strip_filename) { + // Strip everything after the last slash. + size_t pos = path.rfind('/'); + if (pos == std::string::npos) { + errno = ENOENT; + return -1; } - // Allocate a path that we can modify; stick a slash on - // the end to make things easier. - std::string cpath = path; - if (stripFileName) { - // Strip everything after the last slash. - size_t pos = cpath.rfind('/'); - if (pos == std::string::npos) { - errno = ENOENT; - return -1; - } - cpath.resize(pos + 1); - } else { - // Make sure that the path ends in a slash. - cpath.push_back('/'); + path.resize(pos + 1); + } else { + // Make sure that the path ends in a slash. + path.push_back('/'); + } + + // See if it already exists. + DirStatus ds = dir_status(path); + if (ds == DirStatus::DDIR) { + return 0; + } else if (ds == DirStatus::DILLEGAL) { + return -1; + } + + // Walk up the path from the root and make each level. + size_t prev_end = 0; + while (prev_end < path.size()) { + size_t next_end = path.find('/', prev_end + 1); + if (next_end == std::string::npos) { + break; } - - /* See if it already exists. - */ - ds = getPathDirStatus(cpath.c_str()); - if (ds == DDIR) { - return 0; - } else if (ds == DILLEGAL) { + std::string dir_path = path.substr(0, next_end); + // Check this part of the path and make a new directory if necessary. + switch (dir_status(dir_path)) { + case DirStatus::DILLEGAL: + // Could happen if some other process/thread is messing with the filesystem. return -1; - } - - /* Walk up the path from the root and make each level. - * If a directory already exists, no big deal. - */ - const char *path_start = &cpath[0]; - char *p = &cpath[0]; - while (*p != '\0') { - /* Skip any slashes, watching out for the end of the string. - */ - while (*p != '\0' && *p == '/') { - p++; - } - if (*p == '\0') { - break; + case DirStatus::DMISSING: { + char* secontext = nullptr; + if (sehnd) { + selabel_lookup(const_cast<selabel_handle*>(sehnd), &secontext, dir_path.c_str(), mode); + setfscreatecon(secontext); } - - /* Find the end of the next path component. - * We know that we'll see a slash before the NUL, - * because we added it, above. - */ - while (*p != '/') { - p++; + int err = mkdir(dir_path.c_str(), mode); + if (secontext) { + freecon(secontext); + setfscreatecon(nullptr); } - *p = '\0'; - - /* Check this part of the path and make a new directory - * if necessary. - */ - ds = getPathDirStatus(path_start); - if (ds == DILLEGAL) { - /* Could happen if some other process/thread is - * messing with the filesystem. - */ - return -1; - } else if (ds == DMISSING) { - int err; - - char *secontext = NULL; - - if (sehnd) { - selabel_lookup(sehnd, &secontext, path_start, mode); - setfscreatecon(secontext); - } - - err = mkdir(path_start, mode); - - if (secontext) { - freecon(secontext); - setfscreatecon(NULL); - } - - if (err != 0) { - return -1; - } - if (timestamp != NULL && utime(path_start, timestamp)) { - return -1; - } + if (err != 0) { + return -1; } - // else, this directory already exists. - - // Repair the path and continue. - *p = '/'; + break; + } + default: + // Already exists. + break; } - return 0; + prev_end = next_end; + } + return 0; } diff --git a/otautil/DirUtil.h b/otautil/DirUtil.h index beecc1081..85d6c16d1 100644 --- a/otautil/DirUtil.h +++ b/otautil/DirUtil.h @@ -14,28 +14,26 @@ * limitations under the License. */ -#ifndef MINZIP_DIRUTIL_H_ -#define MINZIP_DIRUTIL_H_ +#ifndef OTAUTIL_DIRUTIL_H_ +#define OTAUTIL_DIRUTIL_H_ -#include <utime.h> +#include <sys/stat.h> // mode_t + +#include <string> struct selabel_handle; -/* Like "mkdir -p", try to guarantee that all directories - * specified in path are present, creating as many directories - * as necessary. The specified mode is passed to all mkdir - * calls; no modifications are made to umask. - * - * If stripFileName is set, everything after the final '/' - * is stripped before creating the directory hierarchy. - * - * If timestamp is non-NULL, new directories will be timestamped accordingly. - * - * Returns 0 on success; returns -1 (and sets errno) on failure - * (usually if some element of path is not a directory). - */ -int dirCreateHierarchy(const char *path, int mode, - const struct utimbuf *timestamp, bool stripFileName, - struct selabel_handle* sehnd); +// Like "mkdir -p", try to guarantee that all directories specified in path are present, creating as +// many directories as necessary. The specified mode is passed to all mkdir calls; no modifications +// are made to umask. +// +// If strip_filename is set, everything after the final '/' is stripped before creating the +// directory +// hierarchy. +// +// Returns 0 on success; returns -1 (and sets errno) on failure (usually if some element of path is +// not a directory). +int mkdir_recursively(const std::string& path, mode_t mode, bool strip_filename, + const struct selabel_handle* sehnd); -#endif // MINZIP_DIRUTIL_H_ +#endif // OTAUTIL_DIRUTIL_H_ diff --git a/recovery.cpp b/recovery.cpp index 8f3e9bdea..233e56246 100644 --- a/recovery.cpp +++ b/recovery.cpp @@ -178,19 +178,19 @@ struct selabel_handle* sehandle; * 7b. the user reboots (pulling the battery, etc) into the main system */ -// open a given path, mounting partitions as necessary -FILE* fopen_path(const char *path, const char *mode) { - if (ensure_path_mounted(path) != 0) { - LOG(ERROR) << "Can't mount " << path; - return NULL; - } - - // When writing, try to create the containing directory, if necessary. - // Use generous permissions, the system (init.rc) will reset them. - if (strchr("wa", mode[0])) dirCreateHierarchy(path, 0777, NULL, 1, sehandle); +// Open a given path, mounting partitions as necessary. +FILE* fopen_path(const char* path, const char* mode) { + if (ensure_path_mounted(path) != 0) { + LOG(ERROR) << "Can't mount " << path; + return nullptr; + } - FILE *fp = fopen(path, mode); - return fp; + // When writing, try to create the containing directory, if necessary. Use generous permissions, + // the system (init.rc) will reset them. + if (strchr("wa", mode[0])) { + mkdir_recursively(path, 0777, true, sehandle); + } + return fopen(path, mode); } // close a file, log an error if the error indicator is set @@ -593,7 +593,7 @@ static bool erase_volume(const char* volume) { if (is_cache) { // Re-create the log dir and write back the log entries. if (ensure_path_mounted(CACHE_LOG_DIR) == 0 && - dirCreateHierarchy(CACHE_LOG_DIR, 0777, nullptr, false, sehandle) == 0) { + mkdir_recursively(CACHE_LOG_DIR, 0777, false, sehandle) == 0) { for (const auto& log : log_files) { if (!android::base::WriteStringToFile(log.data, log.name, log.sb.st_mode, log.sb.st_uid, log.sb.st_gid)) { @@ -25,6 +25,10 @@ #include <sys/wait.h> #include <unistd.h> +#include <algorithm> +#include <string> +#include <vector> + #include <android-base/logging.h> #include <android-base/properties.h> #include <android-base/stringprintf.h> @@ -152,18 +156,26 @@ int ensure_path_unmounted(const char* path) { return unmount_mounted_volume(mv); } -static int exec_cmd(const char* path, char* const argv[]) { - int status; - pid_t child; - if ((child = vfork()) == 0) { - execv(path, argv); - _exit(EXIT_FAILURE); - } - waitpid(child, &status, 0); - if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { - LOG(ERROR) << path << " failed with status " << WEXITSTATUS(status); - } - return WEXITSTATUS(status); +static int exec_cmd(const std::vector<std::string>& args) { + CHECK_NE(static_cast<size_t>(0), args.size()); + + std::vector<char*> argv(args.size()); + std::transform(args.cbegin(), args.cend(), argv.begin(), + [](const std::string& arg) { return const_cast<char*>(arg.c_str()); }); + argv.push_back(nullptr); + + pid_t child; + if ((child = vfork()) == 0) { + execv(argv[0], argv.data()); + _exit(EXIT_FAILURE); + } + + int status; + waitpid(child, &status, 0); + if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { + LOG(ERROR) << args[0] << " failed with status " << WEXITSTATUS(status); + } + return WEXITSTATUS(status); } static ssize_t get_file_size(int fd, uint64_t reserve_len) { @@ -184,132 +196,112 @@ static ssize_t get_file_size(int fd, uint64_t reserve_len) { } int format_volume(const char* volume, const char* directory) { - Volume* v = volume_for_path(volume); - if (v == NULL) { - LOG(ERROR) << "unknown volume \"" << volume << "\""; - return -1; + const Volume* v = volume_for_path(volume); + if (v == nullptr) { + LOG(ERROR) << "unknown volume \"" << volume << "\""; + return -1; + } + if (strcmp(v->fs_type, "ramdisk") == 0) { + LOG(ERROR) << "can't format_volume \"" << volume << "\""; + return -1; + } + if (strcmp(v->mount_point, volume) != 0) { + LOG(ERROR) << "can't give path \"" << volume << "\" to format_volume"; + return -1; + } + if (ensure_path_unmounted(volume) != 0) { + LOG(ERROR) << "format_volume: Failed to unmount \"" << v->mount_point << "\""; + return -1; + } + if (strcmp(v->fs_type, "ext4") != 0 && strcmp(v->fs_type, "f2fs") != 0) { + LOG(ERROR) << "format_volume: fs_type \"" << v->fs_type << "\" unsupported"; + return -1; + } + + // If there's a key_loc that looks like a path, it should be a block device for storing encryption + // metadata. Wipe it too. + if (v->key_loc != nullptr && v->key_loc[0] == '/') { + LOG(INFO) << "Wiping " << v->key_loc; + int fd = open(v->key_loc, O_WRONLY | O_CREAT, 0644); + if (fd == -1) { + PLOG(ERROR) << "format_volume: Failed to open " << v->key_loc; + return -1; } - if (strcmp(v->fs_type, "ramdisk") == 0) { - // you can't format the ramdisk. - LOG(ERROR) << "can't format_volume \"" << volume << "\""; - return -1; + wipe_block_device(fd, get_file_size(fd)); + close(fd); + } + + ssize_t length = 0; + if (v->length != 0) { + length = v->length; + } else if (v->key_loc != nullptr && strcmp(v->key_loc, "footer") == 0) { + android::base::unique_fd fd(open(v->blk_device, O_RDONLY)); + if (fd == -1) { + PLOG(ERROR) << "get_file_size: failed to open " << v->blk_device; + return -1; } - if (strcmp(v->mount_point, volume) != 0) { - LOG(ERROR) << "can't give path \"" << volume << "\" to format_volume"; - return -1; + length = get_file_size(fd.get(), CRYPT_FOOTER_OFFSET); + if (length <= 0) { + LOG(ERROR) << "get_file_size: invalid size " << length << " for " << v->blk_device; + return -1; } + } - if (ensure_path_unmounted(volume) != 0) { - LOG(ERROR) << "format_volume failed to unmount \"" << v->mount_point << "\""; - return -1; + if (strcmp(v->fs_type, "ext4") == 0) { + static constexpr int kBlockSize = 4096; + std::vector<std::string> mke2fs_args = { + "/sbin/mke2fs_static", "-F", "-t", "ext4", "-b", std::to_string(kBlockSize), + }; + + int raid_stride = v->logical_blk_size / kBlockSize; + int raid_stripe_width = v->erase_blk_size / kBlockSize; + // stride should be the max of 8KB and logical block size + if (v->logical_blk_size != 0 && v->logical_blk_size < 8192) { + raid_stride = 8192 / kBlockSize; + } + if (v->erase_blk_size != 0 && v->logical_blk_size != 0) { + mke2fs_args.push_back("-E"); + mke2fs_args.push_back( + android::base::StringPrintf("stride=%d,stripe-width=%d", raid_stride, raid_stripe_width)); + } + mke2fs_args.push_back(v->blk_device); + if (length != 0) { + mke2fs_args.push_back(std::to_string(length / kBlockSize)); } - if (strcmp(v->fs_type, "ext4") == 0 || strcmp(v->fs_type, "f2fs") == 0) { - // if there's a key_loc that looks like a path, it should be a - // block device for storing encryption metadata. wipe it too. - if (v->key_loc != NULL && v->key_loc[0] == '/') { - LOG(INFO) << "wiping " << v->key_loc; - int fd = open(v->key_loc, O_WRONLY | O_CREAT, 0644); - if (fd < 0) { - LOG(ERROR) << "format_volume: failed to open " << v->key_loc; - return -1; - } - wipe_block_device(fd, get_file_size(fd)); - close(fd); - } - - ssize_t length = 0; - if (v->length != 0) { - length = v->length; - } else if (v->key_loc != NULL && strcmp(v->key_loc, "footer") == 0) { - android::base::unique_fd fd(open(v->blk_device, O_RDONLY)); - if (fd < 0) { - PLOG(ERROR) << "get_file_size: failed to open " << v->blk_device; - return -1; - } - length = get_file_size(fd.get(), CRYPT_FOOTER_OFFSET); - if (length <= 0) { - LOG(ERROR) << "get_file_size: invalid size " << length << " for " << v->blk_device; - return -1; - } - } - int result; - if (strcmp(v->fs_type, "ext4") == 0) { - static constexpr int block_size = 4096; - int raid_stride = v->logical_blk_size / block_size; - int raid_stripe_width = v->erase_blk_size / block_size; - - // stride should be the max of 8kb and logical block size - if (v->logical_blk_size != 0 && v->logical_blk_size < 8192) { - raid_stride = 8192 / block_size; - } - - const char* mke2fs_argv[] = { "/sbin/mke2fs_static", - "-F", - "-t", - "ext4", - "-b", - nullptr, - nullptr, - nullptr, - nullptr, - nullptr, - nullptr }; - - int i = 5; - std::string block_size_str = std::to_string(block_size); - mke2fs_argv[i++] = block_size_str.c_str(); - - std::string ext_args; - if (v->erase_blk_size != 0 && v->logical_blk_size != 0) { - ext_args = android::base::StringPrintf("stride=%d,stripe-width=%d", raid_stride, - raid_stripe_width); - mke2fs_argv[i++] = "-E"; - mke2fs_argv[i++] = ext_args.c_str(); - } - - mke2fs_argv[i++] = v->blk_device; - - std::string size_str = std::to_string(length / block_size); - if (length != 0) { - mke2fs_argv[i++] = size_str.c_str(); - } - - result = exec_cmd(mke2fs_argv[0], const_cast<char**>(mke2fs_argv)); - if (result == 0 && directory != nullptr) { - const char* e2fsdroid_argv[] = { "/sbin/e2fsdroid_static", - "-e", - "-f", - directory, - "-a", - volume, - v->blk_device, - nullptr }; - - result = exec_cmd(e2fsdroid_argv[0], const_cast<char**>(e2fsdroid_argv)); - } - } else { /* Has to be f2fs because we checked earlier. */ - char *num_sectors = nullptr; - if (length >= 512 && asprintf(&num_sectors, "%zd", length / 512) <= 0) { - LOG(ERROR) << "format_volume: failed to create " << v->fs_type - << " command for " << v->blk_device; - return -1; - } - const char *f2fs_path = "/sbin/mkfs.f2fs"; - const char* const f2fs_argv[] = {"mkfs.f2fs", "-t", "-d1", v->blk_device, num_sectors, nullptr}; - - result = exec_cmd(f2fs_path, (char* const*)f2fs_argv); - free(num_sectors); - } - if (result != 0) { - PLOG(ERROR) << "format_volume: make " << v->fs_type << " failed on " << v->blk_device; - return -1; - } - return 0; + int result = exec_cmd(mke2fs_args); + if (result == 0 && directory != nullptr) { + std::vector<std::string> e2fsdroid_args = { + "/sbin/e2fsdroid_static", + "-e", + "-f", + directory, + "-a", + volume, + v->blk_device, + }; + result = exec_cmd(e2fsdroid_args); } - LOG(ERROR) << "format_volume: fs_type \"" << v->fs_type << "\" unsupported"; + if (result != 0) { + PLOG(ERROR) << "format_volume: Failed to make ext4 on " << v->blk_device; + return -1; + } + return 0; + } + + // Has to be f2fs because we checked earlier. + std::vector<std::string> f2fs_args = { "/sbin/mkfs.f2fs", "-t", "-d1", v->blk_device }; + if (length >= 512) { + f2fs_args.push_back(std::to_string(length / 512)); + } + + int result = exec_cmd(f2fs_args); + if (result != 0) { + PLOG(ERROR) << "format_volume: Failed to make f2fs on " << v->blk_device; return -1; + } + return 0; } int format_volume(const char* volume) { diff --git a/tests/unit/dirutil_test.cpp b/tests/unit/dirutil_test.cpp index e62032c68..7f85d13ea 100644 --- a/tests/unit/dirutil_test.cpp +++ b/tests/unit/dirutil_test.cpp @@ -26,23 +26,23 @@ TEST(DirUtilTest, create_invalid) { // Requesting to create an empty dir is invalid. - ASSERT_EQ(-1, dirCreateHierarchy("", 0755, nullptr, false, nullptr)); + ASSERT_EQ(-1, mkdir_recursively("", 0755, false, nullptr)); ASSERT_EQ(ENOENT, errno); // Requesting to strip the name with no slash present. - ASSERT_EQ(-1, dirCreateHierarchy("abc", 0755, nullptr, true, nullptr)); + ASSERT_EQ(-1, mkdir_recursively("abc", 0755, true, nullptr)); ASSERT_EQ(ENOENT, errno); // Creating a dir that already exists. TemporaryDir td; - ASSERT_EQ(0, dirCreateHierarchy(td.path, 0755, nullptr, false, nullptr)); + ASSERT_EQ(0, mkdir_recursively(td.path, 0755, false, nullptr)); // "///" is a valid dir. - ASSERT_EQ(0, dirCreateHierarchy("///", 0755, nullptr, false, nullptr)); + ASSERT_EQ(0, mkdir_recursively("///", 0755, false, nullptr)); // Request to create a dir, but a file with the same name already exists. TemporaryFile tf; - ASSERT_EQ(-1, dirCreateHierarchy(tf.path, 0755, nullptr, false, nullptr)); + ASSERT_EQ(-1, mkdir_recursively(tf.path, 0755, false, nullptr)); ASSERT_EQ(ENOTDIR, errno); } @@ -51,7 +51,7 @@ TEST(DirUtilTest, create_smoke) { std::string prefix(td.path); std::string path = prefix + "/a/b"; constexpr mode_t mode = 0755; - ASSERT_EQ(0, dirCreateHierarchy(path.c_str(), mode, nullptr, false, nullptr)); + ASSERT_EQ(0, mkdir_recursively(path, mode, false, nullptr)); // Verify. struct stat sb; @@ -69,7 +69,7 @@ TEST(DirUtilTest, create_strip_filename) { TemporaryDir td; std::string prefix(td.path); std::string path = prefix + "/a/b"; - ASSERT_EQ(0, dirCreateHierarchy(path.c_str(), 0755, nullptr, true, nullptr)); + ASSERT_EQ(0, mkdir_recursively(path, 0755, true, nullptr)); // Verify that "../a" exists but not "../a/b". struct stat sb; @@ -83,31 +83,21 @@ TEST(DirUtilTest, create_strip_filename) { ASSERT_EQ(0, rmdir((prefix + "/a").c_str())); } -TEST(DirUtilTest, create_mode_and_timestamp) { +TEST(DirUtilTest, create_mode) { TemporaryDir td; std::string prefix(td.path); std::string path = prefix + "/a/b"; - // Set the timestamp to 8/1/2008. - constexpr struct utimbuf timestamp = { 1217592000, 1217592000 }; constexpr mode_t mode = 0751; - ASSERT_EQ(0, dirCreateHierarchy(path.c_str(), mode, ×tamp, false, nullptr)); + ASSERT_EQ(0, mkdir_recursively(path, mode, false, nullptr)); - // Verify the mode and timestamp for "../a/b". + // Verify the mode for "../a/b". struct stat sb; ASSERT_EQ(0, stat(path.c_str(), &sb)) << strerror(errno); ASSERT_TRUE(S_ISDIR(sb.st_mode)); constexpr mode_t mask = S_IRWXU | S_IRWXG | S_IRWXO; ASSERT_EQ(mode, sb.st_mode & mask); - timespec time; - time.tv_sec = 1217592000; - time.tv_nsec = 0; - - ASSERT_EQ(time.tv_sec, static_cast<long>(sb.st_atime)); - ASSERT_EQ(time.tv_sec, static_cast<long>(sb.st_mtime)); - - // Verify the mode for "../a". Note that the timestamp for intermediate directories (e.g. "../a") - // may not be 'timestamp' according to the current implementation. + // Verify the mode for "../a". ASSERT_EQ(0, stat((prefix + "/a").c_str(), &sb)) << strerror(errno); ASSERT_TRUE(S_ISDIR(sb.st_mode)); ASSERT_EQ(mode, sb.st_mode & mask); diff --git a/uncrypt/uncrypt.cpp b/uncrypt/uncrypt.cpp index 07d183be2..35998bcba 100644 --- a/uncrypt/uncrypt.cpp +++ b/uncrypt/uncrypt.cpp @@ -448,20 +448,20 @@ static int produce_block_map(const char* path, const char* map_file, const char* static int uncrypt(const char* input_path, const char* map_file, const int socket) { LOG(INFO) << "update package is \"" << input_path << "\""; - // Turn the name of the file we're supposed to convert into an - // absolute path, so we can find what filesystem it's on. + // Turn the name of the file we're supposed to convert into an absolute path, so we can find + // what filesystem it's on. char path[PATH_MAX+1]; - if (realpath(input_path, path) == NULL) { + if (realpath(input_path, path) == nullptr) { PLOG(ERROR) << "failed to convert \"" << input_path << "\" to absolute path"; - return 1; + return kUncryptRealpathFindError; } bool encryptable; bool encrypted; const char* blk_dev = find_block_device(path, &encryptable, &encrypted); - if (blk_dev == NULL) { + if (blk_dev == nullptr) { LOG(ERROR) << "failed to find block device for " << path; - return 1; + return kUncryptBlockDeviceFindError; } // If the filesystem it's on isn't encrypted, we only produce the |