diff options
Diffstat (limited to 'updater/install.cpp')
| -rw-r--r-- | updater/install.cpp | 2566 |
1 files changed, 1151 insertions, 1415 deletions
diff --git a/updater/install.cpp b/updater/install.cpp index 74feb56be..643145447 100644 --- a/updater/install.cpp +++ b/updater/install.cpp @@ -14,882 +14,782 @@ * limitations under the License. */ +#include "updater/install.h" + #include <ctype.h> #include <errno.h> +#include <fcntl.h> +#include <ftw.h> +#include <inttypes.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <sys/capability.h> #include <sys/mount.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/wait.h> -#include <unistd.h> -#include <fcntl.h> -#include <time.h> -#include <selinux/selinux.h> -#include <ftw.h> -#include <sys/capability.h> #include <sys/xattr.h> -#include <linux/xattr.h> -#include <inttypes.h> +#include <time.h> +#include <unistd.h> +#include <utime.h> #include <memory> #include <string> #include <vector> #include <android-base/file.h> +#include <android-base/logging.h> +#include <android-base/parsedouble.h> #include <android-base/parseint.h> -#include <android-base/strings.h> +#include <android-base/properties.h> #include <android-base/stringprintf.h> +#include <android-base/strings.h> +#include <applypatch/applypatch.h> +#include <bootloader_message/bootloader_message.h> +#include <cutils/android_reboot.h> +#include <ext4_utils/make_ext4fs.h> +#include <ext4_utils/wipe.h> +#include <openssl/sha.h> +#include <selinux/label.h> +#include <selinux/selinux.h> +#include <ziparchive/zip_archive.h> -#include "bootloader.h" -#include "applypatch/applypatch.h" -#include "cutils/android_reboot.h" -#include "cutils/misc.h" -#include "cutils/properties.h" #include "edify/expr.h" #include "error_code.h" -#include "minzip/DirUtil.h" -#include "mtdutils/mounts.h" -#include "mtdutils/mtdutils.h" -#include "openssl/sha.h" +#include "mounts.h" #include "ota_io.h" -#include "updater.h" -#include "install.h" +#include "otautil/DirUtil.h" +#include "otautil/ZipUtil.h" +#include "print_sha1.h" #include "tune2fs.h" - -#ifdef USE_EXT4 -#include "make_ext4fs.h" -#include "wipe.h" -#endif +#include "updater/updater.h" // Send over the buffer to recovery though the command pipe. static void uiPrint(State* state, const std::string& buffer) { - UpdaterInfo* ui = reinterpret_cast<UpdaterInfo*>(state->cookie); - - // "line1\nline2\n" will be split into 3 tokens: "line1", "line2" and "". - // So skip sending empty strings to UI. - std::vector<std::string> lines = android::base::Split(buffer, "\n"); - for (auto& line: lines) { - if (!line.empty()) { - fprintf(ui->cmd_pipe, "ui_print %s\n", line.c_str()); - fprintf(ui->cmd_pipe, "ui_print\n"); - } - } - - // On the updater side, we need to dump the contents to stderr (which has - // been redirected to the log file). Because the recovery will only print - // the contents to screen when processing pipe command ui_print. - fprintf(stderr, "%s", buffer.c_str()); + UpdaterInfo* ui = static_cast<UpdaterInfo*>(state->cookie); + + // "line1\nline2\n" will be split into 3 tokens: "line1", "line2" and "". + // So skip sending empty strings to UI. + std::vector<std::string> lines = android::base::Split(buffer, "\n"); + for (auto& line : lines) { + if (!line.empty()) { + fprintf(ui->cmd_pipe, "ui_print %s\n", line.c_str()); + fprintf(ui->cmd_pipe, "ui_print\n"); + } + } + + // On the updater side, we need to dump the contents to stderr (which has + // been redirected to the log file). Because the recovery will only print + // the contents to screen when processing pipe command ui_print. + LOG(INFO) << buffer; } -__attribute__((__format__(printf, 2, 3))) __nonnull((2)) -void uiPrintf(State* state, const char* format, ...) { - std::string error_msg; +void uiPrintf(State* _Nonnull state, const char* _Nonnull format, ...) { + std::string error_msg; - va_list ap; - va_start(ap, format); - android::base::StringAppendV(&error_msg, format, ap); - va_end(ap); + va_list ap; + va_start(ap, format); + android::base::StringAppendV(&error_msg, format, ap); + va_end(ap); - uiPrint(state, error_msg); + uiPrint(state, error_msg); } -// Take a sha-1 digest and return it as a newly-allocated hex string. -char* PrintSha1(const uint8_t* digest) { - char* buffer = reinterpret_cast<char*>(malloc(SHA_DIGEST_LENGTH*2 + 1)); - const char* alphabet = "0123456789abcdef"; - size_t i; - for (i = 0; i < SHA_DIGEST_LENGTH; ++i) { - buffer[i*2] = alphabet[(digest[i] >> 4) & 0xf]; - buffer[i*2+1] = alphabet[digest[i] & 0xf]; - } - buffer[i*2] = '\0'; - return buffer; +static bool is_dir(const std::string& dirpath) { + struct stat st; + return stat(dirpath.c_str(), &st) == 0 && S_ISDIR(st.st_mode); +} + +// Create all parent directories of name, if necessary. +static bool make_parents(const std::string& name) { + size_t prev_end = 0; + while (prev_end < name.size()) { + size_t next_end = name.find('/', prev_end + 1); + if (next_end == std::string::npos) { + break; + } + std::string dir_path = name.substr(0, next_end); + if (!is_dir(dir_path)) { + int result = mkdir(dir_path.c_str(), 0700); + if (result != 0) { + PLOG(ERROR) << "failed to mkdir " << dir_path << " when make parents for " << name; + return false; + } + + LOG(INFO) << "created [" << dir_path << "]"; + } + prev_end = next_end; + } + return true; } // mount(fs_type, partition_type, location, mount_point) +// mount(fs_type, partition_type, location, mount_point, mount_options) // -// fs_type="yaffs2" partition_type="MTD" location=partition // fs_type="ext4" partition_type="EMMC" location=device Value* MountFn(const char* name, State* state, int argc, Expr* argv[]) { - char* result = NULL; - if (argc != 4 && argc != 5) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 4-5 args, got %d", name, argc); - } - char* fs_type; - char* partition_type; - char* location; - char* mount_point; - char* mount_options; - bool has_mount_options; - if (argc == 5) { - has_mount_options = true; - if (ReadArgs(state, argv, 5, &fs_type, &partition_type, - &location, &mount_point, &mount_options) < 0) { - return NULL; - } - } else { - has_mount_options = false; - if (ReadArgs(state, argv, 4, &fs_type, &partition_type, - &location, &mount_point) < 0) { - return NULL; - } - } - - if (strlen(fs_type) == 0) { - ErrorAbort(state, kArgsParsingFailure, "fs_type argument to %s() can't be empty", name); - goto done; - } - if (strlen(partition_type) == 0) { - ErrorAbort(state, kArgsParsingFailure, "partition_type argument to %s() can't be empty", - name); - goto done; - } - if (strlen(location) == 0) { - ErrorAbort(state, kArgsParsingFailure, "location argument to %s() can't be empty", name); - goto done; - } - if (strlen(mount_point) == 0) { - ErrorAbort(state, kArgsParsingFailure, "mount_point argument to %s() can't be empty", - name); - goto done; - } - - { - char *secontext = NULL; - - if (sehandle) { - selabel_lookup(sehandle, &secontext, mount_point, 0755); - setfscreatecon(secontext); - } - - mkdir(mount_point, 0755); - - if (secontext) { - freecon(secontext); - setfscreatecon(NULL); - } - } - - if (strcmp(partition_type, "MTD") == 0) { - mtd_scan_partitions(); - const MtdPartition* mtd; - mtd = mtd_find_partition_by_name(location); - if (mtd == NULL) { - uiPrintf(state, "%s: no mtd partition named \"%s\"\n", - name, location); - result = strdup(""); - goto done; - } - if (mtd_mount_partition(mtd, mount_point, fs_type, 0 /* rw */) != 0) { - uiPrintf(state, "mtd mount of %s failed: %s\n", - location, strerror(errno)); - result = strdup(""); - goto done; - } - result = mount_point; - } else { - if (mount(location, mount_point, fs_type, - MS_NOATIME | MS_NODEV | MS_NODIRATIME, - has_mount_options ? mount_options : "") < 0) { - uiPrintf(state, "%s: failed to mount %s at %s: %s\n", - name, location, mount_point, strerror(errno)); - result = strdup(""); - } else { - result = mount_point; - } - } - -done: - free(fs_type); - free(partition_type); - free(location); - if (result != mount_point) free(mount_point); - if (has_mount_options) free(mount_options); - return StringValue(result); + if (argc != 4 && argc != 5) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 4-5 args, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, argc, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& fs_type = args[0]; + const std::string& partition_type = args[1]; + const std::string& location = args[2]; + const std::string& mount_point = args[3]; + std::string mount_options; + + if (argc == 5) { + mount_options = args[4]; + } + + if (fs_type.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "fs_type argument to %s() can't be empty", name); + } + if (partition_type.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "partition_type argument to %s() can't be empty", + name); + } + if (location.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "location argument to %s() can't be empty", name); + } + if (mount_point.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "mount_point argument to %s() can't be empty", + name); + } + + { + char* secontext = nullptr; + + if (sehandle) { + selabel_lookup(sehandle, &secontext, mount_point.c_str(), 0755); + setfscreatecon(secontext); + } + + mkdir(mount_point.c_str(), 0755); + + if (secontext) { + freecon(secontext); + setfscreatecon(nullptr); + } + } + + if (mount(location.c_str(), mount_point.c_str(), fs_type.c_str(), + MS_NOATIME | MS_NODEV | MS_NODIRATIME, mount_options.c_str()) < 0) { + uiPrintf(state, "%s: failed to mount %s at %s: %s\n", name, location.c_str(), + mount_point.c_str(), strerror(errno)); + return StringValue(""); + } + + return StringValue(mount_point); } // is_mounted(mount_point) Value* IsMountedFn(const char* name, State* state, int argc, Expr* argv[]) { - char* result = NULL; - if (argc != 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); - } - char* mount_point; - if (ReadArgs(state, argv, 1, &mount_point) < 0) { - return NULL; - } - if (strlen(mount_point) == 0) { - ErrorAbort(state, kArgsParsingFailure, "mount_point argument to unmount() can't be empty"); - goto done; - } - - scan_mounted_volumes(); - { - const MountedVolume* vol = find_mounted_volume_by_mount_point(mount_point); - if (vol == NULL) { - result = strdup(""); - } else { - result = mount_point; - } - } - -done: - if (result != mount_point) free(mount_point); - return StringValue(result); + if (argc != 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, argc, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& mount_point = args[0]; + if (mount_point.empty()) { + return ErrorAbort(state, kArgsParsingFailure, + "mount_point argument to unmount() can't be empty"); + } + + scan_mounted_volumes(); + MountedVolume* vol = find_mounted_volume_by_mount_point(mount_point.c_str()); + if (vol == nullptr) { + return StringValue(""); + } + + return StringValue(mount_point); } - Value* UnmountFn(const char* name, State* state, int argc, Expr* argv[]) { - char* result = NULL; - if (argc != 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); - } - char* mount_point; - if (ReadArgs(state, argv, 1, &mount_point) < 0) { - return NULL; - } - if (strlen(mount_point) == 0) { - ErrorAbort(state, kArgsParsingFailure, "mount_point argument to unmount() can't be empty"); - goto done; - } - - scan_mounted_volumes(); - { - const MountedVolume* vol = find_mounted_volume_by_mount_point(mount_point); - if (vol == NULL) { - uiPrintf(state, "unmount of %s failed; no such volume\n", mount_point); - result = strdup(""); - } else { - int ret = unmount_mounted_volume(vol); - if (ret != 0) { - uiPrintf(state, "unmount of %s failed (%d): %s\n", - mount_point, ret, strerror(errno)); - } - result = mount_point; - } - } - -done: - if (result != mount_point) free(mount_point); - return StringValue(result); + if (argc != 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); + } + std::vector<std::string> args; + if (!ReadArgs(state, argc, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& mount_point = args[0]; + if (mount_point.empty()) { + return ErrorAbort(state, kArgsParsingFailure, + "mount_point argument to unmount() can't be empty"); + } + + scan_mounted_volumes(); + MountedVolume* vol = find_mounted_volume_by_mount_point(mount_point.c_str()); + if (vol == nullptr) { + uiPrintf(state, "unmount of %s failed; no such volume\n", mount_point.c_str()); + return nullptr; + } else { + int ret = unmount_mounted_volume(vol); + if (ret != 0) { + uiPrintf(state, "unmount of %s failed (%d): %s\n", mount_point.c_str(), ret, strerror(errno)); + } + } + + return StringValue(mount_point); } static int exec_cmd(const char* path, char* const argv[]) { - int status; - pid_t child; - if ((child = vfork()) == 0) { - execv(path, argv); - _exit(-1); - } - waitpid(child, &status, 0); - if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { - printf("%s failed with status %d\n", path, WEXITSTATUS(status)); - } - return WEXITSTATUS(status); + pid_t child; + if ((child = vfork()) == 0) { + execv(path, argv); + _exit(-1); + } + + int status; + waitpid(child, &status, 0); + if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { + LOG(ERROR) << path << " failed with status " << WEXITSTATUS(status); + } + return WEXITSTATUS(status); } - // format(fs_type, partition_type, location, fs_size, mount_point) // -// fs_type="yaffs2" partition_type="MTD" location=partition fs_size=<bytes> mount_point=<location> -// fs_type="ext4" partition_type="EMMC" location=device fs_size=<bytes> mount_point=<location> -// fs_type="f2fs" partition_type="EMMC" location=device fs_size=<bytes> mount_point=<location> +// fs_type="ext4" partition_type="EMMC" location=device fs_size=<bytes> mount_point=<location> +// fs_type="f2fs" partition_type="EMMC" location=device fs_size=<bytes> mount_point=<location> // if fs_size == 0, then make fs uses the entire partition. // if fs_size > 0, that is the size to use // if fs_size < 0, then reserve that many bytes at the end of the partition (not for "f2fs") Value* FormatFn(const char* name, State* state, int argc, Expr* argv[]) { - char* result = NULL; - if (argc != 5) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 5 args, got %d", name, argc); - } - char* fs_type; - char* partition_type; - char* location; - char* fs_size; - char* mount_point; - - if (ReadArgs(state, argv, 5, &fs_type, &partition_type, &location, &fs_size, &mount_point) < 0) { - return NULL; - } - - if (strlen(fs_type) == 0) { - ErrorAbort(state, kArgsParsingFailure, "fs_type argument to %s() can't be empty", name); - goto done; - } - if (strlen(partition_type) == 0) { - ErrorAbort(state, kArgsParsingFailure, "partition_type argument to %s() can't be empty", - name); - goto done; - } - if (strlen(location) == 0) { - ErrorAbort(state, kArgsParsingFailure, "location argument to %s() can't be empty", name); - goto done; - } - - if (strlen(mount_point) == 0) { - ErrorAbort(state, kArgsParsingFailure, "mount_point argument to %s() can't be empty", - name); - goto done; - } - - if (strcmp(partition_type, "MTD") == 0) { - mtd_scan_partitions(); - const MtdPartition* mtd = mtd_find_partition_by_name(location); - if (mtd == NULL) { - printf("%s: no mtd partition named \"%s\"", - name, location); - result = strdup(""); - goto done; - } - MtdWriteContext* ctx = mtd_write_partition(mtd); - if (ctx == NULL) { - printf("%s: can't write \"%s\"", name, location); - result = strdup(""); - goto done; - } - if (mtd_erase_blocks(ctx, -1) == -1) { - mtd_write_close(ctx); - printf("%s: failed to erase \"%s\"", name, location); - result = strdup(""); - goto done; - } - if (mtd_write_close(ctx) != 0) { - printf("%s: failed to close \"%s\"", name, location); - result = strdup(""); - goto done; - } - result = location; -#ifdef USE_EXT4 - } else if (strcmp(fs_type, "ext4") == 0) { - int status = make_ext4fs(location, atoll(fs_size), mount_point, sehandle); - if (status != 0) { - printf("%s: make_ext4fs failed (%d) on %s", - name, status, location); - result = strdup(""); - goto done; - } - result = location; - } else if (strcmp(fs_type, "f2fs") == 0) { - char *num_sectors; - if (asprintf(&num_sectors, "%lld", atoll(fs_size) / 512) <= 0) { - printf("format_volume: failed to create %s command for %s\n", fs_type, location); - result = strdup(""); - goto done; - } - const char *f2fs_path = "/sbin/mkfs.f2fs"; - const char* const f2fs_argv[] = {"mkfs.f2fs", "-t", "-d1", location, num_sectors, NULL}; - int status = exec_cmd(f2fs_path, (char* const*)f2fs_argv); - free(num_sectors); - if (status != 0) { - printf("%s: mkfs.f2fs failed (%d) on %s", - name, status, location); - result = strdup(""); - goto done; - } - result = location; -#endif - } else { - printf("%s: unsupported fs_type \"%s\" partition_type \"%s\"", - name, fs_type, partition_type); - } - -done: - free(fs_type); - free(partition_type); - if (result != location) free(location); - return StringValue(result); + if (argc != 5) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 5 args, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, argc, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& fs_type = args[0]; + const std::string& partition_type = args[1]; + const std::string& location = args[2]; + const std::string& fs_size = args[3]; + const std::string& mount_point = args[4]; + + if (fs_type.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "fs_type argument to %s() can't be empty", name); + } + if (partition_type.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "partition_type argument to %s() can't be empty", + name); + } + if (location.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "location argument to %s() can't be empty", name); + } + if (mount_point.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "mount_point argument to %s() can't be empty", + name); + } + + int64_t size; + if (!android::base::ParseInt(fs_size, &size)) { + return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse int in %s\n", name, + fs_size.c_str()); + } + + if (fs_type == "ext4") { + int status = make_ext4fs(location.c_str(), size, mount_point.c_str(), sehandle); + if (status != 0) { + LOG(ERROR) << name << ": make_ext4fs failed (" << status << ") on " << location; + return StringValue(""); + } + return StringValue(location); + } else if (fs_type == "f2fs") { + if (size < 0) { + LOG(ERROR) << name << ": fs_size can't be negative for f2fs: " << fs_size; + return StringValue(""); + } + std::string num_sectors = std::to_string(size / 512); + + const char* f2fs_path = "/sbin/mkfs.f2fs"; + const char* const f2fs_argv[] = { "mkfs.f2fs", "-t", "-d1", location.c_str(), + num_sectors.c_str(), nullptr }; + int status = exec_cmd(f2fs_path, const_cast<char* const*>(f2fs_argv)); + if (status != 0) { + LOG(ERROR) << name << ": mkfs.f2fs failed (" << status << ") on " << location; + return StringValue(""); + } + return StringValue(location); + } else { + LOG(ERROR) << name << ": unsupported fs_type \"" << fs_type << "\" partition_type \"" + << partition_type << "\""; + } + + return nullptr; } +// rename(src_name, dst_name) +// Renames src_name to dst_name. It automatically creates the necessary directories for dst_name. +// Example: rename("system/app/Hangouts/Hangouts.apk", "system/priv-app/Hangouts/Hangouts.apk") Value* RenameFn(const char* name, State* state, int argc, Expr* argv[]) { - char* result = NULL; - if (argc != 2) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); - } - - char* src_name; - char* dst_name; - - if (ReadArgs(state, argv, 2, &src_name, &dst_name) < 0) { - return NULL; - } - if (strlen(src_name) == 0) { - ErrorAbort(state, kArgsParsingFailure, "src_name argument to %s() can't be empty", name); - goto done; - } - if (strlen(dst_name) == 0) { - ErrorAbort(state, kArgsParsingFailure, "dst_name argument to %s() can't be empty", name); - goto done; - } - if (make_parents(dst_name) != 0) { - ErrorAbort(state, kFileRenameFailure, "Creating parent of %s failed, error %s", - dst_name, strerror(errno)); - } else if (access(dst_name, F_OK) == 0 && access(src_name, F_OK) != 0) { - // File was already moved - result = dst_name; - } else if (rename(src_name, dst_name) != 0) { - ErrorAbort(state, kFileRenameFailure, "Rename of %s to %s failed, error %s", - src_name, dst_name, strerror(errno)); - } else { - result = dst_name; - } - -done: - free(src_name); - if (result != dst_name) free(dst_name); - return StringValue(result); + if (argc != 2) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, argc, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& src_name = args[0]; + const std::string& dst_name = args[1]; + + if (src_name.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "src_name argument to %s() can't be empty", name); + } + if (dst_name.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "dst_name argument to %s() can't be empty", name); + } + if (!make_parents(dst_name)) { + return ErrorAbort(state, kFileRenameFailure, "Creating parent of %s failed, error %s", + dst_name.c_str(), strerror(errno)); + } else if (access(dst_name.c_str(), F_OK) == 0 && access(src_name.c_str(), F_OK) != 0) { + // File was already moved + return StringValue(dst_name); + } else if (rename(src_name.c_str(), dst_name.c_str()) != 0) { + return ErrorAbort(state, kFileRenameFailure, "Rename of %s to %s failed, error %s", + src_name.c_str(), dst_name.c_str(), strerror(errno)); + } + + return StringValue(dst_name); } +// delete([filename, ...]) +// Deletes all the filenames listed. Returns the number of files successfully deleted. +// +// delete_recursive([dirname, ...]) +// Recursively deletes dirnames and all their contents. Returns the number of directories +// successfully deleted. Value* DeleteFn(const char* name, State* state, int argc, Expr* argv[]) { - char** paths = reinterpret_cast<char**>(malloc(argc * sizeof(char*))); - for (int i = 0; i < argc; ++i) { - paths[i] = Evaluate(state, argv[i]); - if (paths[i] == NULL) { - for (int j = 0; j < i; ++j) { - free(paths[j]); - } - free(paths); - return NULL; - } + std::vector<std::string> paths(argc); + for (int i = 0; i < argc; ++i) { + if (!Evaluate(state, argv[i], &paths[i])) { + return nullptr; } + } - bool recursive = (strcmp(name, "delete_recursive") == 0); + bool recursive = (strcmp(name, "delete_recursive") == 0); - int success = 0; - for (int i = 0; i < argc; ++i) { - if ((recursive ? dirUnlinkHierarchy(paths[i]) : unlink(paths[i])) == 0) - ++success; - free(paths[i]); + int success = 0; + for (int i = 0; i < argc; ++i) { + if ((recursive ? dirUnlinkHierarchy(paths[i].c_str()) : unlink(paths[i].c_str())) == 0) { + ++success; } - free(paths); + } - char buffer[10]; - sprintf(buffer, "%d", success); - return StringValue(strdup(buffer)); + return StringValue(std::to_string(success)); } Value* ShowProgressFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 2) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); - } - char* frac_str; - char* sec_str; - if (ReadArgs(state, argv, 2, &frac_str, &sec_str) < 0) { - return NULL; - } - - double frac = strtod(frac_str, NULL); - int sec; - android::base::ParseInt(sec_str, &sec); - - UpdaterInfo* ui = (UpdaterInfo*)(state->cookie); - fprintf(ui->cmd_pipe, "progress %f %d\n", frac, sec); - - free(sec_str); - return StringValue(frac_str); + if (argc != 2) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, argc, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& frac_str = args[0]; + const std::string& sec_str = args[1]; + + double frac; + if (!android::base::ParseDouble(frac_str.c_str(), &frac)) { + return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse double in %s\n", name, + frac_str.c_str()); + } + int sec; + if (!android::base::ParseInt(sec_str.c_str(), &sec)) { + return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse int in %s\n", name, + sec_str.c_str()); + } + + UpdaterInfo* ui = static_cast<UpdaterInfo*>(state->cookie); + fprintf(ui->cmd_pipe, "progress %f %d\n", frac, sec); + + return StringValue(frac_str); } Value* SetProgressFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); - } - char* frac_str; - if (ReadArgs(state, argv, 1, &frac_str) < 0) { - return NULL; - } - - double frac = strtod(frac_str, NULL); - - UpdaterInfo* ui = (UpdaterInfo*)(state->cookie); - fprintf(ui->cmd_pipe, "set_progress %f\n", frac); - - return StringValue(frac_str); -} - -// package_extract_dir(package_path, destination_path) -Value* PackageExtractDirFn(const char* name, State* state, - int argc, Expr* argv[]) { - if (argc != 2) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); - } - char* zip_path; - char* dest_path; - if (ReadArgs(state, argv, 2, &zip_path, &dest_path) < 0) return NULL; - - ZipArchive* za = ((UpdaterInfo*)(state->cookie))->package_zip; - - // To create a consistent system image, never use the clock for timestamps. - struct utimbuf timestamp = { 1217592000, 1217592000 }; // 8/1/2008 default - - bool success = mzExtractRecursive(za, zip_path, dest_path, - ×tamp, - NULL, NULL, sehandle); - free(zip_path); - free(dest_path); - return StringValue(strdup(success ? "t" : "")); + if (argc != 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, 1, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& frac_str = args[0]; + + double frac; + if (!android::base::ParseDouble(frac_str.c_str(), &frac)) { + return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse double in %s\n", name, + frac_str.c_str()); + } + + UpdaterInfo* ui = static_cast<UpdaterInfo*>(state->cookie); + fprintf(ui->cmd_pipe, "set_progress %f\n", frac); + + return StringValue(frac_str); } +// package_extract_dir(package_dir, dest_dir) +// Extracts all files from the package underneath package_dir and writes them to the +// corresponding tree beneath dest_dir. Any existing files are overwritten. +// Example: package_extract_dir("system", "/system") +// +// Note: package_dir needs to be a relative path; dest_dir needs to be an absolute path. +Value* PackageExtractDirFn(const char* name, State* state, int argc, Expr* argv[]) { + if (argc != 2) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); + } -// package_extract_file(package_path, destination_path) -// or -// package_extract_file(package_path) -// to return the entire contents of the file as the result of this -// function (the char* returned is actually a FileContents*). -Value* PackageExtractFileFn(const char* name, State* state, - int argc, Expr* argv[]) { - if (argc < 1 || argc > 2) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 or 2 args, got %d", - name, argc); - } - bool success = false; - - if (argc == 2) { - // The two-argument version extracts to a file. + std::vector<std::string> args; + if (!ReadArgs(state, 2, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& zip_path = args[0]; + const std::string& dest_path = args[1]; - ZipArchive* za = ((UpdaterInfo*)(state->cookie))->package_zip; + ZipArchiveHandle za = static_cast<UpdaterInfo*>(state->cookie)->package_zip; - char* zip_path; - char* dest_path; - if (ReadArgs(state, argv, 2, &zip_path, &dest_path) < 0) return NULL; + // To create a consistent system image, never use the clock for timestamps. + constexpr struct utimbuf timestamp = { 1217592000, 1217592000 }; // 8/1/2008 default - const ZipEntry* entry = mzFindZipEntry(za, zip_path); - if (entry == NULL) { - printf("%s: no %s in package\n", name, zip_path); - goto done2; - } - - { - int fd = TEMP_FAILURE_RETRY(ota_open(dest_path, O_WRONLY | O_CREAT | O_TRUNC | O_SYNC, - S_IRUSR | S_IWUSR)); - if (fd == -1) { - printf("%s: can't open %s for write: %s\n", name, dest_path, strerror(errno)); - goto done2; - } - success = mzExtractZipEntryToFile(za, entry, fd); - if (ota_fsync(fd) == -1) { - printf("fsync of \"%s\" failed: %s\n", dest_path, strerror(errno)); - success = false; - } - if (ota_close(fd) == -1) { - printf("close of \"%s\" failed: %s\n", dest_path, strerror(errno)); - success = false; - } - } + bool success = ExtractPackageRecursive(za, zip_path, dest_path, ×tamp, sehandle); - done2: - free(zip_path); - free(dest_path); - return StringValue(strdup(success ? "t" : "")); - } else { - // The one-argument version returns the contents of the file - // as the result. - - char* zip_path; - if (ReadArgs(state, argv, 1, &zip_path) < 0) return NULL; - - Value* v = reinterpret_cast<Value*>(malloc(sizeof(Value))); - v->type = VAL_BLOB; - v->size = -1; - v->data = NULL; - - ZipArchive* za = ((UpdaterInfo*)(state->cookie))->package_zip; - const ZipEntry* entry = mzFindZipEntry(za, zip_path); - if (entry == NULL) { - printf("%s: no %s in package\n", name, zip_path); - goto done1; - } + return StringValue(success ? "t" : ""); +} - v->size = mzGetZipEntryUncompLen(entry); - v->data = reinterpret_cast<char*>(malloc(v->size)); - if (v->data == NULL) { - printf("%s: failed to allocate %ld bytes for %s\n", - name, (long)v->size, zip_path); - goto done1; - } +// package_extract_file(package_file[, dest_file]) +// Extracts a single package_file from the update package and writes it to dest_file, +// overwriting existing files if necessary. Without the dest_file argument, returns the +// contents of the package file as a binary blob. +Value* PackageExtractFileFn(const char* name, State* state, int argc, Expr* argv[]) { + if (argc < 1 || argc > 2) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 or 2 args, got %d", name, argc); + } - success = mzExtractZipEntryToBuffer(za, entry, - (unsigned char *)v->data); + if (argc == 2) { + // The two-argument version extracts to a file. - done1: - free(zip_path); - if (!success) { - free(v->data); - v->data = NULL; - v->size = -1; - } - return v; + std::vector<std::string> args; + if (!ReadArgs(state, 2, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse %d args", name, argc); } -} + const std::string& zip_path = args[0]; + const std::string& dest_path = args[1]; -// Create all parent directories of name, if necessary. -static int make_parents(char* name) { - char* p; - for (p = name + (strlen(name)-1); p > name; --p) { - if (*p != '/') continue; - *p = '\0'; - if (make_parents(name) < 0) return -1; - int result = mkdir(name, 0700); - if (result == 0) printf("created [%s]\n", name); - *p = '/'; - if (result == 0 || errno == EEXIST) { - // successfully created or already existed; we're done - return 0; - } else { - printf("failed to mkdir %s: %s\n", name, strerror(errno)); - return -1; - } + ZipArchiveHandle za = static_cast<UpdaterInfo*>(state->cookie)->package_zip; + ZipString zip_string_path(zip_path.c_str()); + ZipEntry entry; + if (FindEntry(za, zip_string_path, &entry) != 0) { + LOG(ERROR) << name << ": no " << zip_path << " in package"; + return StringValue(""); } - return 0; -} -// symlink target src1 src2 ... -// unlinks any previously existing src1, src2, etc before creating symlinks. -Value* SymlinkFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc == 0) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1+ args, got %d", name, argc); - } - char* target; - target = Evaluate(state, argv[0]); - if (target == NULL) return NULL; - - char** srcs = ReadVarArgs(state, argc-1, argv+1); - if (srcs == NULL) { - free(target); - return NULL; + unique_fd fd(TEMP_FAILURE_RETRY( + ota_open(dest_path.c_str(), O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR))); + if (fd == -1) { + PLOG(ERROR) << name << ": can't open " << dest_path << " for write"; + return StringValue(""); } - int bad = 0; - int i; - for (i = 0; i < argc-1; ++i) { - if (unlink(srcs[i]) < 0) { - if (errno != ENOENT) { - printf("%s: failed to remove %s: %s\n", - name, srcs[i], strerror(errno)); - ++bad; - } - } - if (make_parents(srcs[i])) { - printf("%s: failed to symlink %s to %s: making parents failed\n", - name, srcs[i], target); - ++bad; - } - if (symlink(target, srcs[i]) < 0) { - printf("%s: failed to symlink %s to %s: %s\n", - name, srcs[i], target, strerror(errno)); - ++bad; - } - free(srcs[i]); + bool success = true; + int32_t ret = ExtractEntryToFile(za, &entry, fd); + if (ret != 0) { + LOG(ERROR) << name << ": Failed to extract entry \"" << zip_path << "\" (" + << entry.uncompressed_length << " bytes) to \"" << dest_path + << "\": " << ErrorCodeString(ret); + success = false; } - free(srcs); - if (bad) { - return ErrorAbort(state, kSymlinkFailure, "%s: some symlinks failed", name); + if (ota_fsync(fd) == -1) { + PLOG(ERROR) << "fsync of \"" << dest_path << "\" failed"; + success = false; + } + if (ota_close(fd) == -1) { + PLOG(ERROR) << "close of \"" << dest_path << "\" failed"; + success = false; } - return StringValue(strdup("")); -} -struct perm_parsed_args { - bool has_uid; - uid_t uid; - bool has_gid; - gid_t gid; - bool has_mode; - mode_t mode; - bool has_fmode; - mode_t fmode; - bool has_dmode; - mode_t dmode; - bool has_selabel; - char* selabel; - bool has_capabilities; - uint64_t capabilities; -}; + return StringValue(success ? "t" : ""); + } else { + // The one-argument version returns the contents of the file as the result. -static struct perm_parsed_args ParsePermArgs(State * state, int argc, char** args) { - int i; - struct perm_parsed_args parsed; - int bad = 0; - static int max_warnings = 20; - - memset(&parsed, 0, sizeof(parsed)); - - for (i = 1; i < argc; i += 2) { - if (strcmp("uid", args[i]) == 0) { - int64_t uid; - if (sscanf(args[i+1], "%" SCNd64, &uid) == 1) { - parsed.uid = uid; - parsed.has_uid = true; - } else { - uiPrintf(state, "ParsePermArgs: invalid UID \"%s\"\n", args[i + 1]); - bad++; - } - continue; - } - if (strcmp("gid", args[i]) == 0) { - int64_t gid; - if (sscanf(args[i+1], "%" SCNd64, &gid) == 1) { - parsed.gid = gid; - parsed.has_gid = true; - } else { - uiPrintf(state, "ParsePermArgs: invalid GID \"%s\"\n", args[i + 1]); - bad++; - } - continue; - } - if (strcmp("mode", args[i]) == 0) { - int32_t mode; - if (sscanf(args[i+1], "%" SCNi32, &mode) == 1) { - parsed.mode = mode; - parsed.has_mode = true; - } else { - uiPrintf(state, "ParsePermArgs: invalid mode \"%s\"\n", args[i + 1]); - bad++; - } - continue; - } - if (strcmp("dmode", args[i]) == 0) { - int32_t mode; - if (sscanf(args[i+1], "%" SCNi32, &mode) == 1) { - parsed.dmode = mode; - parsed.has_dmode = true; - } else { - uiPrintf(state, "ParsePermArgs: invalid dmode \"%s\"\n", args[i + 1]); - bad++; - } - continue; - } - if (strcmp("fmode", args[i]) == 0) { - int32_t mode; - if (sscanf(args[i+1], "%" SCNi32, &mode) == 1) { - parsed.fmode = mode; - parsed.has_fmode = true; - } else { - uiPrintf(state, "ParsePermArgs: invalid fmode \"%s\"\n", args[i + 1]); - bad++; - } - continue; - } - if (strcmp("capabilities", args[i]) == 0) { - int64_t capabilities; - if (sscanf(args[i+1], "%" SCNi64, &capabilities) == 1) { - parsed.capabilities = capabilities; - parsed.has_capabilities = true; - } else { - uiPrintf(state, "ParsePermArgs: invalid capabilities \"%s\"\n", args[i + 1]); - bad++; - } - continue; - } - if (strcmp("selabel", args[i]) == 0) { - if (args[i+1][0] != '\0') { - parsed.selabel = args[i+1]; - parsed.has_selabel = true; - } else { - uiPrintf(state, "ParsePermArgs: invalid selabel \"%s\"\n", args[i + 1]); - bad++; - } - continue; - } - if (max_warnings != 0) { - printf("ParsedPermArgs: unknown key \"%s\", ignoring\n", args[i]); - max_warnings--; - if (max_warnings == 0) { - printf("ParsedPermArgs: suppressing further warnings\n"); - } - } + std::vector<std::string> args; + if (!ReadArgs(state, 1, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse %d args", name, argc); } - return parsed; -} + const std::string& zip_path = args[0]; -static int ApplyParsedPerms( - State * state, - const char* filename, - const struct stat *statptr, - struct perm_parsed_args parsed) -{ - int bad = 0; - - if (parsed.has_selabel) { - if (lsetfilecon(filename, parsed.selabel) != 0) { - uiPrintf(state, "ApplyParsedPerms: lsetfilecon of %s to %s failed: %s\n", - filename, parsed.selabel, strerror(errno)); - bad++; - } + ZipArchiveHandle za = static_cast<UpdaterInfo*>(state->cookie)->package_zip; + ZipString zip_string_path(zip_path.c_str()); + ZipEntry entry; + if (FindEntry(za, zip_string_path, &entry) != 0) { + return ErrorAbort(state, kPackageExtractFileFailure, "%s(): no %s in package", name, + zip_path.c_str()); } - /* ignore symlinks */ - if (S_ISLNK(statptr->st_mode)) { - return bad; - } + std::string buffer; + buffer.resize(entry.uncompressed_length); - if (parsed.has_uid) { - if (chown(filename, parsed.uid, -1) < 0) { - uiPrintf(state, "ApplyParsedPerms: chown of %s to %d failed: %s\n", - filename, parsed.uid, strerror(errno)); - bad++; - } + int32_t ret = ExtractToMemory(za, &entry, reinterpret_cast<uint8_t*>(&buffer[0]), buffer.size()); + if (ret != 0) { + return ErrorAbort(state, kPackageExtractFileFailure, + "%s: Failed to extract entry \"%s\" (%zu bytes) to memory: %s", name, + zip_path.c_str(), buffer.size(), ErrorCodeString(ret)); } - if (parsed.has_gid) { - if (chown(filename, -1, parsed.gid) < 0) { - uiPrintf(state, "ApplyParsedPerms: chgrp of %s to %d failed: %s\n", - filename, parsed.gid, strerror(errno)); - bad++; - } - } + return new Value(VAL_BLOB, buffer); + } +} - if (parsed.has_mode) { - if (chmod(filename, parsed.mode) < 0) { - uiPrintf(state, "ApplyParsedPerms: chmod of %s to %d failed: %s\n", - filename, parsed.mode, strerror(errno)); - bad++; - } - } +// symlink(target, [src1, src2, ...]) +// Creates all sources as symlinks to target. It unlinks any previously existing src1, src2, etc +// before creating symlinks. +Value* SymlinkFn(const char* name, State* state, int argc, Expr* argv[]) { + if (argc == 0) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1+ args, got %d", name, argc); + } + std::string target; + if (!Evaluate(state, argv[0], &target)) { + return nullptr; + } + + std::vector<std::string> srcs; + if (!ReadArgs(state, argc - 1, argv + 1, &srcs)) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): Failed to parse the argument(s)", name); + } + + size_t bad = 0; + for (const auto& src : srcs) { + if (unlink(src.c_str()) == -1 && errno != ENOENT) { + PLOG(ERROR) << name << ": failed to remove " << src; + ++bad; + } else if (!make_parents(src)) { + LOG(ERROR) << name << ": failed to symlink " << src << " to " << target + << ": making parents failed"; + ++bad; + } else if (symlink(target.c_str(), src.c_str()) == -1) { + PLOG(ERROR) << name << ": failed to symlink " << src << " to " << target; + ++bad; + } + } + if (bad != 0) { + return ErrorAbort(state, kSymlinkFailure, "%s: Failed to create %zu symlink(s)", name, bad); + } + return StringValue("t"); +} - if (parsed.has_dmode && S_ISDIR(statptr->st_mode)) { - if (chmod(filename, parsed.dmode) < 0) { - uiPrintf(state, "ApplyParsedPerms: chmod of %s to %d failed: %s\n", - filename, parsed.dmode, strerror(errno)); - bad++; - } - } +struct perm_parsed_args { + bool has_uid; + uid_t uid; + bool has_gid; + gid_t gid; + bool has_mode; + mode_t mode; + bool has_fmode; + mode_t fmode; + bool has_dmode; + mode_t dmode; + bool has_selabel; + const char* selabel; + bool has_capabilities; + uint64_t capabilities; +}; - if (parsed.has_fmode && S_ISREG(statptr->st_mode)) { - if (chmod(filename, parsed.fmode) < 0) { - uiPrintf(state, "ApplyParsedPerms: chmod of %s to %d failed: %s\n", - filename, parsed.fmode, strerror(errno)); - bad++; - } - } +static struct perm_parsed_args ParsePermArgs(State * state, int argc, + const std::vector<std::string>& args) { + struct perm_parsed_args parsed; + int bad = 0; + static int max_warnings = 20; + + memset(&parsed, 0, sizeof(parsed)); + + for (int i = 1; i < argc; i += 2) { + if (args[i] == "uid") { + int64_t uid; + if (sscanf(args[i + 1].c_str(), "%" SCNd64, &uid) == 1) { + parsed.uid = uid; + parsed.has_uid = true; + } else { + uiPrintf(state, "ParsePermArgs: invalid UID \"%s\"\n", args[i + 1].c_str()); + bad++; + } + continue; + } + if (args[i] == "gid") { + int64_t gid; + if (sscanf(args[i + 1].c_str(), "%" SCNd64, &gid) == 1) { + parsed.gid = gid; + parsed.has_gid = true; + } else { + uiPrintf(state, "ParsePermArgs: invalid GID \"%s\"\n", args[i + 1].c_str()); + bad++; + } + continue; + } + if (args[i] == "mode") { + int32_t mode; + if (sscanf(args[i + 1].c_str(), "%" SCNi32, &mode) == 1) { + parsed.mode = mode; + parsed.has_mode = true; + } else { + uiPrintf(state, "ParsePermArgs: invalid mode \"%s\"\n", args[i + 1].c_str()); + bad++; + } + continue; + } + if (args[i] == "dmode") { + int32_t mode; + if (sscanf(args[i + 1].c_str(), "%" SCNi32, &mode) == 1) { + parsed.dmode = mode; + parsed.has_dmode = true; + } else { + uiPrintf(state, "ParsePermArgs: invalid dmode \"%s\"\n", args[i + 1].c_str()); + bad++; + } + continue; + } + if (args[i] == "fmode") { + int32_t mode; + if (sscanf(args[i + 1].c_str(), "%" SCNi32, &mode) == 1) { + parsed.fmode = mode; + parsed.has_fmode = true; + } else { + uiPrintf(state, "ParsePermArgs: invalid fmode \"%s\"\n", args[i + 1].c_str()); + bad++; + } + continue; + } + if (args[i] == "capabilities") { + int64_t capabilities; + if (sscanf(args[i + 1].c_str(), "%" SCNi64, &capabilities) == 1) { + parsed.capabilities = capabilities; + parsed.has_capabilities = true; + } else { + uiPrintf(state, "ParsePermArgs: invalid capabilities \"%s\"\n", args[i + 1].c_str()); + bad++; + } + continue; + } + if (args[i] == "selabel") { + if (!args[i + 1].empty()) { + parsed.selabel = args[i + 1].c_str(); + parsed.has_selabel = true; + } else { + uiPrintf(state, "ParsePermArgs: invalid selabel \"%s\"\n", args[i + 1].c_str()); + bad++; + } + continue; + } + if (max_warnings != 0) { + printf("ParsedPermArgs: unknown key \"%s\", ignoring\n", args[i].c_str()); + max_warnings--; + if (max_warnings == 0) { + LOG(INFO) << "ParsedPermArgs: suppressing further warnings"; + } + } + } + return parsed; +} - if (parsed.has_capabilities && S_ISREG(statptr->st_mode)) { - if (parsed.capabilities == 0) { - if ((removexattr(filename, XATTR_NAME_CAPS) == -1) && (errno != ENODATA)) { - // Report failure unless it's ENODATA (attribute not set) - uiPrintf(state, "ApplyParsedPerms: removexattr of %s to %" PRIx64 " failed: %s\n", - filename, parsed.capabilities, strerror(errno)); - bad++; - } - } else { - struct vfs_cap_data cap_data; - memset(&cap_data, 0, sizeof(cap_data)); - cap_data.magic_etc = VFS_CAP_REVISION | VFS_CAP_FLAGS_EFFECTIVE; - cap_data.data[0].permitted = (uint32_t) (parsed.capabilities & 0xffffffff); - cap_data.data[0].inheritable = 0; - cap_data.data[1].permitted = (uint32_t) (parsed.capabilities >> 32); - cap_data.data[1].inheritable = 0; - if (setxattr(filename, XATTR_NAME_CAPS, &cap_data, sizeof(cap_data), 0) < 0) { - uiPrintf(state, "ApplyParsedPerms: setcap of %s to %" PRIx64 " failed: %s\n", - filename, parsed.capabilities, strerror(errno)); - bad++; - } - } +static int ApplyParsedPerms(State* state, const char* filename, const struct stat* statptr, + struct perm_parsed_args parsed) { + int bad = 0; + + if (parsed.has_selabel) { + if (lsetfilecon(filename, parsed.selabel) != 0) { + uiPrintf(state, "ApplyParsedPerms: lsetfilecon of %s to %s failed: %s\n", filename, + parsed.selabel, strerror(errno)); + bad++; } + } + /* ignore symlinks */ + if (S_ISLNK(statptr->st_mode)) { return bad; + } + + if (parsed.has_uid) { + if (chown(filename, parsed.uid, -1) < 0) { + uiPrintf(state, "ApplyParsedPerms: chown of %s to %d failed: %s\n", filename, parsed.uid, + strerror(errno)); + bad++; + } + } + + if (parsed.has_gid) { + if (chown(filename, -1, parsed.gid) < 0) { + uiPrintf(state, "ApplyParsedPerms: chgrp of %s to %d failed: %s\n", filename, parsed.gid, + strerror(errno)); + bad++; + } + } + + if (parsed.has_mode) { + if (chmod(filename, parsed.mode) < 0) { + uiPrintf(state, "ApplyParsedPerms: chmod of %s to %d failed: %s\n", filename, parsed.mode, + strerror(errno)); + bad++; + } + } + + if (parsed.has_dmode && S_ISDIR(statptr->st_mode)) { + if (chmod(filename, parsed.dmode) < 0) { + uiPrintf(state, "ApplyParsedPerms: chmod of %s to %d failed: %s\n", filename, parsed.dmode, + strerror(errno)); + bad++; + } + } + + if (parsed.has_fmode && S_ISREG(statptr->st_mode)) { + if (chmod(filename, parsed.fmode) < 0) { + uiPrintf(state, "ApplyParsedPerms: chmod of %s to %d failed: %s\n", filename, parsed.fmode, + strerror(errno)); + bad++; + } + } + + if (parsed.has_capabilities && S_ISREG(statptr->st_mode)) { + if (parsed.capabilities == 0) { + if ((removexattr(filename, XATTR_NAME_CAPS) == -1) && (errno != ENODATA)) { + // Report failure unless it's ENODATA (attribute not set) + uiPrintf(state, "ApplyParsedPerms: removexattr of %s to %" PRIx64 " failed: %s\n", filename, + parsed.capabilities, strerror(errno)); + bad++; + } + } else { + struct vfs_cap_data cap_data; + memset(&cap_data, 0, sizeof(cap_data)); + cap_data.magic_etc = VFS_CAP_REVISION | VFS_CAP_FLAGS_EFFECTIVE; + cap_data.data[0].permitted = (uint32_t)(parsed.capabilities & 0xffffffff); + cap_data.data[0].inheritable = 0; + cap_data.data[1].permitted = (uint32_t)(parsed.capabilities >> 32); + cap_data.data[1].inheritable = 0; + if (setxattr(filename, XATTR_NAME_CAPS, &cap_data, sizeof(cap_data), 0) < 0) { + uiPrintf(state, "ApplyParsedPerms: setcap of %s to %" PRIx64 " failed: %s\n", filename, + parsed.capabilities, strerror(errno)); + bad++; + } + } + } + + return bad; } // nftw doesn't allow us to pass along context, so we need to use @@ -897,453 +797,296 @@ static int ApplyParsedPerms( static struct perm_parsed_args recursive_parsed_args; static State* recursive_state; -static int do_SetMetadataRecursive(const char* filename, const struct stat *statptr, - int fileflags, struct FTW *pfwt) { - return ApplyParsedPerms(recursive_state, filename, statptr, recursive_parsed_args); +static int do_SetMetadataRecursive(const char* filename, const struct stat* statptr, int fileflags, + struct FTW* pfwt) { + return ApplyParsedPerms(recursive_state, filename, statptr, recursive_parsed_args); } static Value* SetMetadataFn(const char* name, State* state, int argc, Expr* argv[]) { - int bad = 0; - struct stat sb; - Value* result = NULL; - - bool recursive = (strcmp(name, "set_metadata_recursive") == 0); - - if ((argc % 2) != 1) { - return ErrorAbort(state, kArgsParsingFailure, - "%s() expects an odd number of arguments, got %d", name, argc); - } - - char** args = ReadVarArgs(state, argc, argv); - if (args == NULL) return NULL; - - if (lstat(args[0], &sb) == -1) { - result = ErrorAbort(state, kSetMetadataFailure, "%s: Error on lstat of \"%s\": %s", - name, args[0], strerror(errno)); - goto done; - } - - { - struct perm_parsed_args parsed = ParsePermArgs(state, argc, args); - - if (recursive) { - recursive_parsed_args = parsed; - recursive_state = state; - bad += nftw(args[0], do_SetMetadataRecursive, 30, FTW_CHDIR | FTW_DEPTH | FTW_PHYS); - memset(&recursive_parsed_args, 0, sizeof(recursive_parsed_args)); - recursive_state = NULL; - } else { - bad += ApplyParsedPerms(state, args[0], &sb, parsed); - } - } - -done: - for (int i = 0; i < argc; ++i) { - free(args[i]); - } - free(args); - - if (result != NULL) { - return result; - } - - if (bad > 0) { - return ErrorAbort(state, kSetMetadataFailure, "%s: some changes failed", name); - } - - return StringValue(strdup("")); + if ((argc % 2) != 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects an odd number of arguments, got %d", + name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, argc, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + + struct stat sb; + if (lstat(args[0].c_str(), &sb) == -1) { + return ErrorAbort(state, kSetMetadataFailure, "%s: Error on lstat of \"%s\": %s", name, + args[0].c_str(), strerror(errno)); + } + + struct perm_parsed_args parsed = ParsePermArgs(state, argc, args); + int bad = 0; + bool recursive = (strcmp(name, "set_metadata_recursive") == 0); + + if (recursive) { + recursive_parsed_args = parsed; + recursive_state = state; + bad += nftw(args[0].c_str(), do_SetMetadataRecursive, 30, FTW_CHDIR | FTW_DEPTH | FTW_PHYS); + memset(&recursive_parsed_args, 0, sizeof(recursive_parsed_args)); + recursive_state = NULL; + } else { + bad += ApplyParsedPerms(state, args[0].c_str(), &sb, parsed); + } + + if (bad > 0) { + return ErrorAbort(state, kSetMetadataFailure, "%s: some changes failed", name); + } + + return StringValue(""); } Value* GetPropFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); - } - char* key = Evaluate(state, argv[0]); - if (key == NULL) return NULL; - - char value[PROPERTY_VALUE_MAX]; - property_get(key, value, ""); - free(key); - - return StringValue(strdup(value)); + if (argc != 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); + } + std::string key; + if (!Evaluate(state, argv[0], &key)) { + return nullptr; + } + std::string value = android::base::GetProperty(key, ""); + + return StringValue(value); } // file_getprop(file, key) // // interprets 'file' as a getprop-style file (key=value pairs, one -// per line. # comment lines,blank lines, lines without '=' ignored), +// per line. # comment lines, blank lines, lines without '=' ignored), // and returns the value for 'key' (or "" if it isn't defined). Value* FileGetPropFn(const char* name, State* state, int argc, Expr* argv[]) { - char* result = NULL; - char* buffer = NULL; - char* filename; - char* key; - if (ReadArgs(state, argv, 2, &filename, &key) < 0) { - return NULL; - } - - struct stat st; - if (stat(filename, &st) < 0) { - ErrorAbort(state, kFileGetPropFailure, "%s: failed to stat \"%s\": %s", name, filename, - strerror(errno)); - goto done; - } - -#define MAX_FILE_GETPROP_SIZE 65536 - - if (st.st_size > MAX_FILE_GETPROP_SIZE) { - ErrorAbort(state, kFileGetPropFailure, "%s too large for %s (max %d)", filename, name, - MAX_FILE_GETPROP_SIZE); - goto done; - } - - buffer = reinterpret_cast<char*>(malloc(st.st_size+1)); - if (buffer == NULL) { - ErrorAbort(state, kFileGetPropFailure, "%s: failed to alloc %lld bytes", name, - (long long)st.st_size+1); - goto done; - } - - FILE* f; - f = fopen(filename, "rb"); - if (f == NULL) { - ErrorAbort(state, kFileOpenFailure, "%s: failed to open %s: %s", name, filename, - strerror(errno)); - goto done; - } - - if (ota_fread(buffer, 1, st.st_size, f) != static_cast<size_t>(st.st_size)) { - ErrorAbort(state, kFreadFailure, "%s: failed to read %lld bytes from %s", - name, (long long)st.st_size+1, filename); - fclose(f); - goto done; - } - buffer[st.st_size] = '\0'; - - fclose(f); - - char* line; - line = strtok(buffer, "\n"); - do { - // skip whitespace at start of line - while (*line && isspace(*line)) ++line; - - // comment or blank line: skip to next line - if (*line == '\0' || *line == '#') continue; - - char* equal = strchr(line, '='); - if (equal == NULL) { - continue; - } - - // trim whitespace between key and '=' - char* key_end = equal-1; - while (key_end > line && isspace(*key_end)) --key_end; - key_end[1] = '\0'; - - // not the key we're looking for - if (strcmp(key, line) != 0) continue; - - // skip whitespace after the '=' to the start of the value - char* val_start = equal+1; - while(*val_start && isspace(*val_start)) ++val_start; - - // trim trailing whitespace - char* val_end = val_start + strlen(val_start)-1; - while (val_end > val_start && isspace(*val_end)) --val_end; - val_end[1] = '\0'; - - result = strdup(val_start); - break; - - } while ((line = strtok(NULL, "\n"))); - - if (result == NULL) result = strdup(""); - - done: - free(filename); - free(key); - free(buffer); - return StringValue(result); -} - -// write_raw_image(filename_or_blob, partition) -Value* WriteRawImageFn(const char* name, State* state, int argc, Expr* argv[]) { - char* result = NULL; - - Value* partition_value; - Value* contents; - if (ReadValueArgs(state, argv, 2, &contents, &partition_value) < 0) { - return NULL; - } - - char* partition = NULL; - if (partition_value->type != VAL_STRING) { - ErrorAbort(state, kArgsParsingFailure, "partition argument to %s must be string", name); - goto done; - } - partition = partition_value->data; - if (strlen(partition) == 0) { - ErrorAbort(state, kArgsParsingFailure, "partition argument to %s can't be empty", name); - goto done; - } - if (contents->type == VAL_STRING && strlen((char*) contents->data) == 0) { - ErrorAbort(state, kArgsParsingFailure, "file argument to %s can't be empty", name); - goto done; - } - - mtd_scan_partitions(); - const MtdPartition* mtd; - mtd = mtd_find_partition_by_name(partition); - if (mtd == NULL) { - printf("%s: no mtd partition named \"%s\"\n", name, partition); - result = strdup(""); - goto done; - } - - MtdWriteContext* ctx; - ctx = mtd_write_partition(mtd); - if (ctx == NULL) { - printf("%s: can't write mtd partition \"%s\"\n", - name, partition); - result = strdup(""); - goto done; - } - - bool success; - - if (contents->type == VAL_STRING) { - // we're given a filename as the contents - char* filename = contents->data; - FILE* f = ota_fopen(filename, "rb"); - if (f == NULL) { - printf("%s: can't open %s: %s\n", name, filename, strerror(errno)); - result = strdup(""); - goto done; - } - - success = true; - char* buffer = reinterpret_cast<char*>(malloc(BUFSIZ)); - int read; - while (success && (read = ota_fread(buffer, 1, BUFSIZ, f)) > 0) { - int wrote = mtd_write_data(ctx, buffer, read); - success = success && (wrote == read); - } - free(buffer); - ota_fclose(f); - } else { - // we're given a blob as the contents - ssize_t wrote = mtd_write_data(ctx, contents->data, contents->size); - success = (wrote == contents->size); - } - if (!success) { - printf("mtd_write_data to %s failed: %s\n", - partition, strerror(errno)); - } - - if (mtd_erase_blocks(ctx, -1) == -1) { - printf("%s: error erasing blocks of %s\n", name, partition); - } - if (mtd_write_close(ctx) != 0) { - printf("%s: error closing write of %s\n", name, partition); - } - - printf("%s %s partition\n", - success ? "wrote" : "failed to write", partition); - - result = success ? partition : strdup(""); - -done: - if (result != partition) FreeValue(partition_value); - FreeValue(contents); - return StringValue(result); + if (argc != 2) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, 2, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& filename = args[0]; + const std::string& key = args[1]; + + struct stat st; + if (stat(filename.c_str(), &st) < 0) { + return ErrorAbort(state, kFileGetPropFailure, "%s: failed to stat \"%s\": %s", name, + filename.c_str(), strerror(errno)); + } + + constexpr off_t MAX_FILE_GETPROP_SIZE = 65536; + if (st.st_size > MAX_FILE_GETPROP_SIZE) { + return ErrorAbort(state, kFileGetPropFailure, "%s too large for %s (max %lld)", + filename.c_str(), name, static_cast<long long>(MAX_FILE_GETPROP_SIZE)); + } + + std::string buffer(st.st_size, '\0'); + unique_file f(ota_fopen(filename.c_str(), "rb")); + if (f == nullptr) { + return ErrorAbort(state, kFileOpenFailure, "%s: failed to open %s: %s", name, filename.c_str(), + strerror(errno)); + } + + if (ota_fread(&buffer[0], 1, st.st_size, f.get()) != static_cast<size_t>(st.st_size)) { + ErrorAbort(state, kFreadFailure, "%s: failed to read %zu bytes from %s", name, + static_cast<size_t>(st.st_size), filename.c_str()); + return nullptr; + } + + ota_fclose(f); + + std::vector<std::string> lines = android::base::Split(buffer, "\n"); + for (size_t i = 0; i < lines.size(); i++) { + std::string line = android::base::Trim(lines[i]); + + // comment or blank line: skip to next line + if (line.empty() || line[0] == '#') { + continue; + } + size_t equal_pos = line.find('='); + if (equal_pos == std::string::npos) { + continue; + } + + // trim whitespace between key and '=' + std::string str = android::base::Trim(line.substr(0, equal_pos)); + + // not the key we're looking for + if (key != str) continue; + + return StringValue(android::base::Trim(line.substr(equal_pos + 1))); + } + + return StringValue(""); } // apply_patch_space(bytes) -Value* ApplyPatchSpaceFn(const char* name, State* state, - int argc, Expr* argv[]) { - char* bytes_str; - if (ReadArgs(state, argv, 1, &bytes_str) < 0) { - return NULL; - } - - size_t bytes; - if (!android::base::ParseUint(bytes_str, &bytes)) { - ErrorAbort(state, kArgsParsingFailure, "%s(): can't parse \"%s\" as byte count\n\n", - name, bytes_str); - free(bytes_str); - return nullptr; - } - - return StringValue(strdup(CacheSizeCheck(bytes) ? "" : "t")); +Value* ApplyPatchSpaceFn(const char* name, State* state, int argc, Expr* argv[]) { + std::vector<std::string> args; + if (!ReadArgs(state, 1, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& bytes_str = args[0]; + + size_t bytes; + if (!android::base::ParseUint(bytes_str.c_str(), &bytes)) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): can't parse \"%s\" as byte count\n\n", + name, bytes_str.c_str()); + } + + return StringValue(CacheSizeCheck(bytes) ? "" : "t"); } -// apply_patch(file, size, init_sha1, tgt_sha1, patch) - +// apply_patch(src_file, tgt_file, tgt_sha1, tgt_size, patch1_sha1, patch1_blob, [...]) +// Applies a binary patch to the src_file to produce the tgt_file. If the desired target is the +// same as the source, pass "-" for tgt_file. tgt_sha1 and tgt_size are the expected final SHA1 +// hash and size of the target file. The remaining arguments must come in pairs: a SHA1 hash (a +// 40-character hex string) and a blob. The blob is the patch to be applied when the source +// file's current contents have the given SHA1. +// +// The patching is done in a safe manner that guarantees the target file either has the desired +// SHA1 hash and size, or it is untouched -- it will not be left in an unrecoverable intermediate +// state. If the process is interrupted during patching, the target file may be in an intermediate +// state; a copy exists in the cache partition so restarting the update can successfully update +// the file. Value* ApplyPatchFn(const char* name, State* state, int argc, Expr* argv[]) { if (argc < 6 || (argc % 2) == 1) { return ErrorAbort(state, kArgsParsingFailure, "%s(): expected at least 6 args and an " - "even number, got %d", name, argc); + "even number, got %d", name, argc); } - char* source_filename; - char* target_filename; - char* target_sha1; - char* target_size_str; - if (ReadArgs(state, argv, 4, &source_filename, &target_filename, - &target_sha1, &target_size_str) < 0) { - return NULL; + std::vector<std::string> args; + if (!ReadArgs(state, 4, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); } + const std::string& source_filename = args[0]; + const std::string& target_filename = args[1]; + const std::string& target_sha1 = args[2]; + const std::string& target_size_str = args[3]; size_t target_size; - if (!android::base::ParseUint(target_size_str, &target_size)) { - ErrorAbort(state, kArgsParsingFailure, "%s(): can't parse \"%s\" as byte count", - name, target_size_str); - free(source_filename); - free(target_filename); - free(target_sha1); - free(target_size_str); - return nullptr; + if (!android::base::ParseUint(target_size_str.c_str(), &target_size)) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): can't parse \"%s\" as byte count", + name, target_size_str.c_str()); } int patchcount = (argc-4) / 2; - std::unique_ptr<Value*, decltype(&free)> arg_values(ReadValueVarArgs(state, argc-4, argv+4), - free); - if (!arg_values) { + std::vector<std::unique_ptr<Value>> arg_values; + if (!ReadValueArgs(state, argc-4, argv+4, &arg_values)) { return nullptr; } - std::vector<std::unique_ptr<Value, decltype(&FreeValue)>> patch_shas; - std::vector<std::unique_ptr<Value, decltype(&FreeValue)>> patches; - // Protect values by unique_ptrs first to get rid of memory leak. - for (int i = 0; i < patchcount * 2; i += 2) { - patch_shas.emplace_back(arg_values.get()[i], FreeValue); - patches.emplace_back(arg_values.get()[i+1], FreeValue); - } for (int i = 0; i < patchcount; ++i) { - if (patch_shas[i]->type != VAL_STRING) { - ErrorAbort(state, kArgsParsingFailure, "%s(): sha-1 #%d is not string", name, i); - return nullptr; + if (arg_values[i * 2]->type != VAL_STRING) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): sha-1 #%d is not string", name, + i * 2); } - if (patches[i]->type != VAL_BLOB) { - ErrorAbort(state, kArgsParsingFailure, "%s(): patch #%d is not blob", name, i); - return nullptr; + if (arg_values[i * 2 + 1]->type != VAL_BLOB) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): patch #%d is not blob", name, + i * 2 + 1); } } - std::vector<char*> patch_sha_str; - std::vector<Value*> patch_ptrs; + std::vector<std::string> patch_sha_str; + std::vector<std::unique_ptr<Value>> patches; for (int i = 0; i < patchcount; ++i) { - patch_sha_str.push_back(patch_shas[i]->data); - patch_ptrs.push_back(patches[i].get()); + patch_sha_str.push_back(arg_values[i * 2]->data); + patches.push_back(std::move(arg_values[i * 2 + 1])); } - int result = applypatch(source_filename, target_filename, - target_sha1, target_size, - patchcount, patch_sha_str.data(), patch_ptrs.data(), NULL); + int result = applypatch(source_filename.c_str(), target_filename.c_str(), + target_sha1.c_str(), target_size, + patch_sha_str, patches, nullptr); - return StringValue(strdup(result == 0 ? "t" : "")); + return StringValue(result == 0 ? "t" : ""); } -// apply_patch_check(file, [sha1_1, ...]) -Value* ApplyPatchCheckFn(const char* name, State* state, - int argc, Expr* argv[]) { - if (argc < 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s(): expected at least 1 arg, got %d", - name, argc); - } - - char* filename; - if (ReadArgs(state, argv, 1, &filename) < 0) { - return NULL; - } - - int patchcount = argc-1; - char** sha1s = ReadVarArgs(state, argc-1, argv+1); - - int result = applypatch_check(filename, patchcount, sha1s); - - int i; - for (i = 0; i < patchcount; ++i) { - free(sha1s[i]); - } - free(sha1s); - - return StringValue(strdup(result == 0 ? "t" : "")); +// apply_patch_check(filename, [sha1, ...]) +// Returns true if the contents of filename or the temporary copy in the cache partition (if +// present) have a SHA-1 checksum equal to one of the given sha1 values. sha1 values are +// specified as 40 hex digits. This function differs from sha1_check(read_file(filename), +// sha1 [, ...]) in that it knows to check the cache partition copy, so apply_patch_check() will +// succeed even if the file was corrupted by an interrupted apply_patch() update. +Value* ApplyPatchCheckFn(const char* name, State* state, int argc, Expr* argv[]) { + if (argc < 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): expected at least 1 arg, got %d", name, + argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, 1, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& filename = args[0]; + + std::vector<std::string> sha1s; + if (!ReadArgs(state, argc - 1, argv + 1, &sha1s)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + int result = applypatch_check(filename.c_str(), sha1s); + + return StringValue(result == 0 ? "t" : ""); } // This is the updater side handler for ui_print() in edify script. Contents // will be sent over to the recovery side for on-screen display. Value* UIPrintFn(const char* name, State* state, int argc, Expr* argv[]) { - char** args = ReadVarArgs(state, argc, argv); - if (args == NULL) { - return NULL; - } - - std::string buffer; - for (int i = 0; i < argc; ++i) { - buffer += args[i]; - free(args[i]); - } - free(args); - - buffer += "\n"; - uiPrint(state, buffer); - return StringValue(strdup(buffer.c_str())); + std::vector<std::string> args; + if (!ReadArgs(state, argc, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + + std::string buffer = android::base::Join(args, "") + "\n"; + uiPrint(state, buffer); + return StringValue(buffer); } Value* WipeCacheFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 0) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects no args, got %d", name, argc); - } - fprintf(((UpdaterInfo*)(state->cookie))->cmd_pipe, "wipe_cache\n"); - return StringValue(strdup("t")); + if (argc != 0) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects no args, got %d", name, argc); + } + fprintf(static_cast<UpdaterInfo*>(state->cookie)->cmd_pipe, "wipe_cache\n"); + return StringValue("t"); } Value* RunProgramFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc < 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects at least 1 arg", name); - } - char** args = ReadVarArgs(state, argc, argv); - if (args == NULL) { - return NULL; - } - - char** args2 = reinterpret_cast<char**>(malloc(sizeof(char*) * (argc+1))); - memcpy(args2, args, sizeof(char*) * argc); - args2[argc] = NULL; - - printf("about to run program [%s] with %d args\n", args2[0], argc); - - pid_t child = fork(); - if (child == 0) { - execv(args2[0], args2); - printf("run_program: execv failed: %s\n", strerror(errno)); - _exit(1); - } - int status; - waitpid(child, &status, 0); - if (WIFEXITED(status)) { - if (WEXITSTATUS(status) != 0) { - printf("run_program: child exited with status %d\n", - WEXITSTATUS(status)); - } - } else if (WIFSIGNALED(status)) { - printf("run_program: child terminated by signal %d\n", - WTERMSIG(status)); - } - - int i; - for (i = 0; i < argc; ++i) { - free(args[i]); - } - free(args); - free(args2); - - char buffer[20]; - sprintf(buffer, "%d", status); - - return StringValue(strdup(buffer)); + if (argc < 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects at least 1 arg", name); + } + + std::vector<std::string> args; + if (!ReadArgs(state, argc, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + + char* args2[argc + 1]; + for (int i = 0; i < argc; i++) { + args2[i] = &args[i][0]; + } + args2[argc] = nullptr; + + LOG(INFO) << "about to run program [" << args2[0] << "] with " << argc << " args"; + + pid_t child = fork(); + if (child == 0) { + execv(args2[0], args2); + PLOG(ERROR) << "run_program: execv failed"; + _exit(1); + } + + int status; + waitpid(child, &status, 0); + if (WIFEXITED(status)) { + if (WEXITSTATUS(status) != 0) { + LOG(ERROR) << "run_program: child exited with status " << WEXITSTATUS(status); + } + } else if (WIFSIGNALED(status)) { + LOG(ERROR) << "run_program: child terminated by signal " << WTERMSIG(status); + } + + return StringValue(std::to_string(status)); } // sha1_check(data) @@ -1355,103 +1098,90 @@ Value* RunProgramFn(const char* name, State* state, int argc, Expr* argv[]) { // strings passed, or "" if it does not equal any of them. // Value* Sha1CheckFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc < 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects at least 1 arg", name); - } - - std::unique_ptr<Value*, decltype(&free)> arg_values(ReadValueVarArgs(state, argc, argv), free); - if (arg_values == nullptr) { - return nullptr; - } - std::vector<std::unique_ptr<Value, decltype(&FreeValue)>> args; - for (int i = 0; i < argc; ++i) { - args.emplace_back(arg_values.get()[i], FreeValue); - } - - if (args[0]->size < 0) { - return StringValue(strdup("")); - } - uint8_t digest[SHA_DIGEST_LENGTH]; - SHA1(reinterpret_cast<uint8_t*>(args[0]->data), args[0]->size, digest); - - if (argc == 1) { - return StringValue(PrintSha1(digest)); - } - - int i; + if (argc < 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects at least 1 arg", name); + } + + std::vector<std::unique_ptr<Value>> args; + if (!ReadValueArgs(state, argc, argv, &args)) { + return nullptr; + } + + if (args[0]->type == VAL_INVALID) { + return StringValue(""); + } + uint8_t digest[SHA_DIGEST_LENGTH]; + SHA1(reinterpret_cast<const uint8_t*>(args[0]->data.c_str()), args[0]->data.size(), digest); + + if (argc == 1) { + return StringValue(print_sha1(digest)); + } + + for (int i = 1; i < argc; ++i) { uint8_t arg_digest[SHA_DIGEST_LENGTH]; - for (i = 1; i < argc; ++i) { - if (args[i]->type != VAL_STRING) { - printf("%s(): arg %d is not a string; skipping", - name, i); - } else if (ParseSha1(args[i]->data, arg_digest) != 0) { - // Warn about bad args and skip them. - printf("%s(): error parsing \"%s\" as sha-1; skipping", - name, args[i]->data); - } else if (memcmp(digest, arg_digest, SHA_DIGEST_LENGTH) == 0) { - break; - } - } - if (i >= argc) { - // Didn't match any of the hex strings; return false. - return StringValue(strdup("")); - } - // Found a match. - return args[i].release(); + if (args[i]->type != VAL_STRING) { + LOG(ERROR) << name << "(): arg " << i << " is not a string; skipping"; + } else if (ParseSha1(args[i]->data.c_str(), arg_digest) != 0) { + // Warn about bad args and skip them. + LOG(ERROR) << name << "(): error parsing \"" << args[i]->data << "\" as sha-1; skipping"; + } else if (memcmp(digest, arg_digest, SHA_DIGEST_LENGTH) == 0) { + // Found a match. + return args[i].release(); + } + } + + // Didn't match any of the hex strings; return false. + return StringValue(""); } // Read a local file and return its contents (the Value* returned // is actually a FileContents*). Value* ReadFileFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); - } - char* filename; - if (ReadArgs(state, argv, 1, &filename) < 0) return NULL; + if (argc != 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); + } - Value* v = static_cast<Value*>(malloc(sizeof(Value))); - if (v == nullptr) { - return nullptr; - } + std::vector<std::string> args; + if (!ReadArgs(state, 1, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& filename = args[0]; + + Value* v = new Value(VAL_INVALID, ""); + + FileContents fc; + if (LoadFileContents(filename.c_str(), &fc) == 0) { v->type = VAL_BLOB; - v->size = -1; - v->data = nullptr; - - FileContents fc; - if (LoadFileContents(filename, &fc) == 0) { - v->data = static_cast<char*>(malloc(fc.data.size())); - if (v->data != nullptr) { - memcpy(v->data, fc.data.data(), fc.data.size()); - v->size = fc.data.size(); - } - } - free(filename); - return v; + v->data = std::string(fc.data.begin(), fc.data.end()); + } + return v; } // write_value(value, filename) // Writes 'value' to 'filename'. // Example: write_value("960000", "/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq") Value* WriteValueFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 2) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); - } - - char* value; - char* filename; - if (ReadArgs(state, argv, 2, &value, &filename) < 0) { - return ErrorAbort(state, kArgsParsingFailure, "%s(): Failed to parse the argument(s)", - name); - } - - bool ret = android::base::WriteStringToFile(value, filename); - if (!ret) { - printf("%s: Failed to write to \"%s\": %s\n", name, filename, strerror(errno)); - } - - free(value); - free(filename); - return StringValue(strdup(ret ? "t" : "")); + if (argc != 2) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, 2, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): Failed to parse the argument(s)", name); + } + + const std::string& filename = args[1]; + if (filename.empty()) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): Filename cannot be empty", name); + } + + const std::string& value = args[0]; + if (!android::base::WriteStringToFile(value, filename)) { + PLOG(ERROR) << name << ": Failed to write to \"" << filename << "\""; + return StringValue(""); + } else { + return StringValue("t"); + } } // Immediately reboot the device. Recovery is not finished normally, @@ -1464,35 +1194,35 @@ Value* WriteValueFn(const char* name, State* state, int argc, Expr* argv[]) { // partition, or "" (empty string) to boot from the regular boot // partition. Value* RebootNowFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 2) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); - } - - char* filename; - char* property; - if (ReadArgs(state, argv, 2, &filename, &property) < 0) return NULL; - - char buffer[80]; - - // zero out the 'command' field of the bootloader message. - memset(buffer, 0, sizeof(((struct bootloader_message*)0)->command)); - FILE* f = fopen(filename, "r+b"); - fseek(f, offsetof(struct bootloader_message, command), SEEK_SET); - ota_fwrite(buffer, sizeof(((struct bootloader_message*)0)->command), 1, f); - fclose(f); - free(filename); - - strcpy(buffer, "reboot,"); - if (property != NULL) { - strncat(buffer, property, sizeof(buffer)-10); - } - - property_set(ANDROID_RB_PROPERTY, buffer); - - sleep(5); - free(property); - ErrorAbort(state, kRebootFailure, "%s() failed to reboot", name); - return NULL; + if (argc != 2) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, 2, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): Failed to parse the argument(s)", name); + } + const std::string& filename = args[0]; + const std::string& property = args[1]; + + // Zero out the 'command' field of the bootloader message. Leave the rest intact. + bootloader_message boot; + std::string err; + if (!read_bootloader_message_from(&boot, filename, &err)) { + LOG(ERROR) << name << "(): Failed to read from \"" << filename << "\": " << err; + return StringValue(""); + } + memset(boot.command, 0, sizeof(boot.command)); + if (!write_bootloader_message_to(boot, filename, &err)) { + LOG(ERROR) << name << "(): Failed to write to \"" << filename << "\": " << err; + return StringValue(""); + } + + const std::string reboot_cmd = "reboot," + property; + android::base::SetProperty(ANDROID_RB_PROPERTY, reboot_cmd); + + sleep(5); + return ErrorAbort(state, kRebootFailure, "%s() failed to reboot", name); } // Store a string value somewhere that future invocations of recovery @@ -1506,165 +1236,171 @@ Value* RebootNowFn(const char* name, State* state, int argc, Expr* argv[]) { // second argument is the string to store; it should not exceed 31 // bytes. Value* SetStageFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 2) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); - } - - char* filename; - char* stagestr; - if (ReadArgs(state, argv, 2, &filename, &stagestr) < 0) return NULL; - - // Store this value in the misc partition, immediately after the - // bootloader message that the main recovery uses to save its - // arguments in case of the device restarting midway through - // package installation. - FILE* f = fopen(filename, "r+b"); - fseek(f, offsetof(struct bootloader_message, stage), SEEK_SET); - int to_write = strlen(stagestr)+1; - int max_size = sizeof(((struct bootloader_message*)0)->stage); - if (to_write > max_size) { - to_write = max_size; - stagestr[max_size-1] = 0; - } - ota_fwrite(stagestr, to_write, 1, f); - fclose(f); - - free(stagestr); - return StringValue(filename); + if (argc != 2) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, 2, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& filename = args[0]; + const std::string& stagestr = args[1]; + + // Store this value in the misc partition, immediately after the + // bootloader message that the main recovery uses to save its + // arguments in case of the device restarting midway through + // package installation. + bootloader_message boot; + std::string err; + if (!read_bootloader_message_from(&boot, filename, &err)) { + LOG(ERROR) << name << "(): Failed to read from \"" << filename << "\": " << err; + return StringValue(""); + } + strlcpy(boot.stage, stagestr.c_str(), sizeof(boot.stage)); + if (!write_bootloader_message_to(boot, filename, &err)) { + LOG(ERROR) << name << "(): Failed to write to \"" << filename << "\": " << err; + return StringValue(""); + } + + return StringValue(filename); } // Return the value most recently saved with SetStageFn. The argument // is the block device for the misc partition. Value* GetStageFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); - } - - char* filename; - if (ReadArgs(state, argv, 1, &filename) < 0) return NULL; - - char buffer[sizeof(((struct bootloader_message*)0)->stage)]; - FILE* f = fopen(filename, "rb"); - fseek(f, offsetof(struct bootloader_message, stage), SEEK_SET); - ota_fread(buffer, sizeof(buffer), 1, f); - fclose(f); - buffer[sizeof(buffer)-1] = '\0'; - - return StringValue(strdup(buffer)); + if (argc != 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, 1, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& filename = args[0]; + + bootloader_message boot; + std::string err; + if (!read_bootloader_message_from(&boot, filename, &err)) { + LOG(ERROR) << name << "(): Failed to read from \"" << filename << "\": " << err; + return StringValue(""); + } + + return StringValue(boot.stage); } Value* WipeBlockDeviceFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 2) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); - } - - char* filename; - char* len_str; - if (ReadArgs(state, argv, 2, &filename, &len_str) < 0) return NULL; - - size_t len; - android::base::ParseUint(len_str, &len); - int fd = ota_open(filename, O_WRONLY, 0644); - int success = wipe_block_device(fd, len); - - free(filename); - free(len_str); - - ota_close(fd); - - return StringValue(strdup(success ? "t" : "")); + if (argc != 2) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, 2, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& filename = args[0]; + const std::string& len_str = args[1]; + + size_t len; + if (!android::base::ParseUint(len_str.c_str(), &len)) { + return nullptr; + } + unique_fd fd(ota_open(filename.c_str(), O_WRONLY, 0644)); + // The wipe_block_device function in ext4_utils returns 0 on success and 1 + // for failure. + int status = wipe_block_device(fd, len); + return StringValue((status == 0) ? "t" : ""); } Value* EnableRebootFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc != 0) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects no args, got %d", name, argc); - } - UpdaterInfo* ui = (UpdaterInfo*)(state->cookie); - fprintf(ui->cmd_pipe, "enable_reboot\n"); - return StringValue(strdup("t")); + if (argc != 0) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects no args, got %d", name, argc); + } + UpdaterInfo* ui = static_cast<UpdaterInfo*>(state->cookie); + fprintf(ui->cmd_pipe, "enable_reboot\n"); + return StringValue("t"); } Value* Tune2FsFn(const char* name, State* state, int argc, Expr* argv[]) { - if (argc == 0) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects args, got %d", name, argc); - } - - char** args = ReadVarArgs(state, argc, argv); - if (args == NULL) { - return ErrorAbort(state, kArgsParsingFailure, "%s() could not read args", name); - } - - char** args2 = reinterpret_cast<char**>(malloc(sizeof(char*) * (argc+1))); - // Tune2fs expects the program name as its args[0] - args2[0] = strdup(name); - for (int i = 0; i < argc; ++i) { - args2[i + 1] = args[i]; - } - int result = tune2fs_main(argc + 1, args2); - for (int i = 0; i < argc; ++i) { - free(args[i]); - } - free(args); - - free(args2[0]); - free(args2); - if (result != 0) { - return ErrorAbort(state, kTune2FsFailure, "%s() returned error code %d", - name, result); - } - return StringValue(strdup("t")); + if (argc == 0) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects args, got %d", name, argc); + } + + std::vector<std::string> args; + if (!ReadArgs(state, argc, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() could not read args", name); + } + + char* args2[argc + 1]; + // Tune2fs expects the program name as its args[0] + args2[0] = const_cast<char*>(name); + if (args2[0] == nullptr) { + return nullptr; + } + for (int i = 0; i < argc; ++i) { + args2[i + 1] = &args[i][0]; + } + + // tune2fs changes the file system parameters on an ext2 file system; it + // returns 0 on success. + int result = tune2fs_main(argc + 1, args2); + if (result != 0) { + return ErrorAbort(state, kTune2FsFailure, "%s() returned error code %d", name, result); + } + return StringValue("t"); } void RegisterInstallFunctions() { - RegisterFunction("mount", MountFn); - RegisterFunction("is_mounted", IsMountedFn); - RegisterFunction("unmount", UnmountFn); - RegisterFunction("format", FormatFn); - RegisterFunction("show_progress", ShowProgressFn); - RegisterFunction("set_progress", SetProgressFn); - RegisterFunction("delete", DeleteFn); - RegisterFunction("delete_recursive", DeleteFn); - RegisterFunction("package_extract_dir", PackageExtractDirFn); - RegisterFunction("package_extract_file", PackageExtractFileFn); - RegisterFunction("symlink", SymlinkFn); - - // Usage: - // set_metadata("filename", "key1", "value1", "key2", "value2", ...) - // Example: - // set_metadata("/system/bin/netcfg", "uid", 0, "gid", 3003, "mode", 02750, "selabel", "u:object_r:system_file:s0", "capabilities", 0x0); - RegisterFunction("set_metadata", SetMetadataFn); - - // Usage: - // set_metadata_recursive("dirname", "key1", "value1", "key2", "value2", ...) - // Example: - // set_metadata_recursive("/system", "uid", 0, "gid", 0, "fmode", 0644, "dmode", 0755, "selabel", "u:object_r:system_file:s0", "capabilities", 0x0); - RegisterFunction("set_metadata_recursive", SetMetadataFn); - - RegisterFunction("getprop", GetPropFn); - RegisterFunction("file_getprop", FileGetPropFn); - RegisterFunction("write_raw_image", WriteRawImageFn); - - RegisterFunction("apply_patch", ApplyPatchFn); - RegisterFunction("apply_patch_check", ApplyPatchCheckFn); - RegisterFunction("apply_patch_space", ApplyPatchSpaceFn); - - RegisterFunction("wipe_block_device", WipeBlockDeviceFn); - - RegisterFunction("read_file", ReadFileFn); - RegisterFunction("sha1_check", Sha1CheckFn); - RegisterFunction("rename", RenameFn); - RegisterFunction("write_value", WriteValueFn); - - RegisterFunction("wipe_cache", WipeCacheFn); - - RegisterFunction("ui_print", UIPrintFn); - - RegisterFunction("run_program", RunProgramFn); - - RegisterFunction("reboot_now", RebootNowFn); - RegisterFunction("get_stage", GetStageFn); - RegisterFunction("set_stage", SetStageFn); - - RegisterFunction("enable_reboot", EnableRebootFn); - RegisterFunction("tune2fs", Tune2FsFn); + RegisterFunction("mount", MountFn); + RegisterFunction("is_mounted", IsMountedFn); + RegisterFunction("unmount", UnmountFn); + RegisterFunction("format", FormatFn); + RegisterFunction("show_progress", ShowProgressFn); + RegisterFunction("set_progress", SetProgressFn); + RegisterFunction("delete", DeleteFn); + RegisterFunction("delete_recursive", DeleteFn); + RegisterFunction("package_extract_dir", PackageExtractDirFn); + RegisterFunction("package_extract_file", PackageExtractFileFn); + RegisterFunction("symlink", SymlinkFn); + + // Usage: + // set_metadata("filename", "key1", "value1", "key2", "value2", ...) + // Example: + // set_metadata("/system/bin/netcfg", "uid", 0, "gid", 3003, "mode", 02750, "selabel", + // "u:object_r:system_file:s0", "capabilities", 0x0); + RegisterFunction("set_metadata", SetMetadataFn); + + // Usage: + // set_metadata_recursive("dirname", "key1", "value1", "key2", "value2", ...) + // Example: + // set_metadata_recursive("/system", "uid", 0, "gid", 0, "fmode", 0644, "dmode", 0755, + // "selabel", "u:object_r:system_file:s0", "capabilities", 0x0); + RegisterFunction("set_metadata_recursive", SetMetadataFn); + + RegisterFunction("getprop", GetPropFn); + RegisterFunction("file_getprop", FileGetPropFn); + + RegisterFunction("apply_patch", ApplyPatchFn); + RegisterFunction("apply_patch_check", ApplyPatchCheckFn); + RegisterFunction("apply_patch_space", ApplyPatchSpaceFn); + + RegisterFunction("wipe_block_device", WipeBlockDeviceFn); + + RegisterFunction("read_file", ReadFileFn); + RegisterFunction("sha1_check", Sha1CheckFn); + RegisterFunction("rename", RenameFn); + RegisterFunction("write_value", WriteValueFn); + + RegisterFunction("wipe_cache", WipeCacheFn); + + RegisterFunction("ui_print", UIPrintFn); + + RegisterFunction("run_program", RunProgramFn); + + RegisterFunction("reboot_now", RebootNowFn); + RegisterFunction("get_stage", GetStageFn); + RegisterFunction("set_stage", SetStageFn); + + RegisterFunction("enable_reboot", EnableRebootFn); + RegisterFunction("tune2fs", Tune2FsFn); } |