diff options
Diffstat (limited to 'updater/install.cpp')
| -rw-r--r-- | updater/install.cpp | 468 |
1 files changed, 272 insertions, 196 deletions
diff --git a/updater/install.cpp b/updater/install.cpp index a8ee4bf39..741d97014 100644 --- a/updater/install.cpp +++ b/updater/install.cpp @@ -49,17 +49,15 @@ #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 <tune2fs.h> #include <ziparchive/zip_archive.h> #include "edify/expr.h" -#include "error_code.h" #include "mounts.h" -#include "ota_io.h" #include "applypatch/applypatch.h" #include "flashutils/flashutils.h" @@ -73,10 +71,11 @@ #include "wipe.h" #endif -#include "otautil/DirUtil.h" #include "otautil/ZipUtil.h" -#include "print_sha1.h" -#include "tune2fs.h" +#include "otafault/ota_io.h" +#include "otautil/DirUtil.h" +#include "otautil/error_code.h" +#include "otautil/print_sha1.h" #include "updater/updater.h" // Send over the buffer to recovery though the command pipe. @@ -109,32 +108,242 @@ void uiPrintf(State* _Nonnull state, const char* _Nonnull format, ...) { uiPrint(state, error_msg); } -static bool is_dir(const std::string& dirpath) { - struct stat st; - return stat(dirpath.c_str(), &st) == 0 && S_ISDIR(st.st_mode); +// 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, const std::vector<std::unique_ptr<Expr>>& argv) { + std::vector<std::string> args; + if (!ReadArgs(state, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): Failed to parse the argument(s)", name); + } + + std::string buffer = android::base::Join(args, ""); + uiPrint(state, buffer); + return StringValue(buffer); } -// 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; +// 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, + const std::vector<std::unique_ptr<Expr>>& argv) { + if (argv.size() < 1 || argv.size() > 2) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 or 2 args, got %zu", name, + argv.size()); + } + + if (argv.size() == 2) { + // The two-argument version extracts to a file. + + std::vector<std::string> args; + if (!ReadArgs(state, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse %zu args", name, + argv.size()); } - 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; - } + const std::string& zip_path = args[0]; + const std::string& dest_path = args[1]; - LOG(INFO) << "created [" << dir_path << "]"; + 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(""); + } + + 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(""); + } + + 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; + } + 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(success ? "t" : ""); + } else { + // The one-argument version returns the contents of the file as the result. + + std::vector<std::string> args; + if (!ReadArgs(state, argv, &args)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse %zu args", name, + argv.size()); } - prev_end = next_end; + const std::string& zip_path = args[0]; + + 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()); + } + + std::string buffer; + buffer.resize(entry.uncompressed_length); + + 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)); + } + + return new Value(VAL_BLOB, buffer); + } +} + +// 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, + const std::vector<std::unique_ptr<Expr>>& argv) { + if (argv.size() < 6 || (argv.size() % 2) == 1) { + return ErrorAbort(state, kArgsParsingFailure, + "%s(): expected at least 6 args and an " + "even number, got %zu", + name, argv.size()); + } + + std::vector<std::string> args; + if (!ReadArgs(state, argv, &args, 0, 4)) { + 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.c_str(), &target_size)) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): can't parse \"%s\" as byte count", name, + target_size_str.c_str()); + } + + int patchcount = (argv.size() - 4) / 2; + std::vector<std::unique_ptr<Value>> arg_values; + if (!ReadValueArgs(state, argv, &arg_values, 4, argv.size() - 4)) { + return nullptr; + } + + for (int i = 0; i < patchcount; ++i) { + if (arg_values[i * 2]->type != VAL_STRING) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): sha-1 #%d is not string", name, i * 2); + } + 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<std::string> patch_sha_str; + std::vector<std::unique_ptr<Value>> patches; + for (int i = 0; i < patchcount; ++i) { + 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.c_str(), target_filename.c_str(), target_sha1.c_str(), + target_size, patch_sha_str, patches, nullptr); + + return StringValue(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, + const std::vector<std::unique_ptr<Expr>>& argv) { + if (argv.size() < 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s(): expected at least 1 arg, got %zu", name, + argv.size()); + } + + std::vector<std::string> args; + if (!ReadArgs(state, argv, &args, 0, 1)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + } + const std::string& filename = args[0]; + + std::vector<std::string> sha1s; + if (argv.size() > 1 && !ReadArgs(state, argv, &sha1s, 1, argv.size() - 1)) { + return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); } - return true; + int result = applypatch_check(filename.c_str(), sha1s); + + return StringValue(result == 0 ? "t" : ""); +} + +// sha1_check(data) +// to return the sha1 of the data (given in the format returned by +// read_file). +// +// sha1_check(data, sha1_hex, [sha1_hex, ...]) +// returns the sha1 of the file if it matches any of the hex +// strings passed, or "" if it does not equal any of them. +// +Value* Sha1CheckFn(const char* name, State* state, const std::vector<std::unique_ptr<Expr>>& argv) { + if (argv.size() < 1) { + return ErrorAbort(state, kArgsParsingFailure, "%s() expects at least 1 arg", name); + } + + std::vector<std::unique_ptr<Value>> args; + if (!ReadValueArgs(state, 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 (argv.size() == 1) { + return StringValue(print_sha1(digest)); + } + + for (size_t i = 1; i < argv.size(); ++i) { + uint8_t arg_digest[SHA_DIGEST_LENGTH]; + 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(""); } // mount(fs_type, partition_type, location, mount_point) @@ -311,7 +520,7 @@ Value* FormatFn(const char* name, State* state, const std::vector<std::unique_pt int64_t size; if (!android::base::ParseInt(fs_size, &size)) { - return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse int in %s\n", name, + return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse int in %s", name, fs_size.c_str()); } @@ -326,14 +535,8 @@ Value* FormatFn(const char* name, State* state, const std::vector<std::unique_pt int status = exec_cmd(mke2fs_argv[0], const_cast<char**>(mke2fs_argv)); if (status != 0) { - LOG(WARNING) << name << ": mke2fs failed (" << status << ") on " << location - << ", falling back to make_ext4fs"; - 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); + LOG(ERROR) << name << ": mke2fs failed (" << status << ") on " << location; + return StringValue(""); } const char* e2fsdroid_argv[] = { "/sbin/e2fsdroid_static", "-e", "-a", mount_point.c_str(), @@ -352,15 +555,30 @@ Value* FormatFn(const char* name, State* state, const std::vector<std::unique_pt std::string num_sectors = std::to_string(size / 512); const char* f2fs_path = "/sbin/mkfs.f2fs"; - const char* f2fs_argv[] = { - "mkfs.f2fs", "-t", "-d1", location.c_str(), (size < 512) ? nullptr : num_sectors.c_str(), - nullptr - }; + const char* f2fs_argv[] = { "mkfs.f2fs", + "-d1", + "-f", + "-O", "encrypt", + "-O", "quota", + "-O", "verity", + "-w", "512", + location.c_str(), + (size < 512) ? nullptr : num_sectors.c_str(), + nullptr }; int status = exec_cmd(f2fs_path, const_cast<char**>(f2fs_argv)); if (status != 0) { LOG(ERROR) << name << ": mkfs.f2fs failed (" << status << ") on " << location; return StringValue(""); } + + const char* sload_argv[] = { "/sbin/sload.f2fs", "-t", mount_point.c_str(), location.c_str(), + nullptr }; + status = exec_cmd(sload_argv[0], const_cast<char**>(sload_argv)); + if (status != 0) { + LOG(ERROR) << name << ": sload.f2fs failed (" << status << ") on " << location; + return StringValue(""); + } + return StringValue(location); } else { LOG(ERROR) << name << ": unsupported fs_type \"" << fs_type << "\" partition_type \"" @@ -447,12 +665,12 @@ Value* ShowProgressFn(const char* name, State* state, double frac; if (!android::base::ParseDouble(frac_str.c_str(), &frac)) { - return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse double in %s\n", name, + return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse double in %s", 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, + return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse int in %s", name, sec_str.c_str()); } @@ -462,7 +680,8 @@ Value* ShowProgressFn(const char* name, State* state, return StringValue(frac_str); } -Value* SetProgressFn(const char* name, State* state, const std::vector<std::unique_ptr<Expr>>& argv) { +Value* SetProgressFn(const char* name, State* state, + const std::vector<std::unique_ptr<Expr>>& argv) { if (argv.size() != 1) { return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %zu", name, argv.size()); } @@ -475,7 +694,7 @@ Value* SetProgressFn(const char* name, State* state, const std::vector<std::uniq double frac; if (!android::base::ParseDouble(frac_str.c_str(), &frac)) { - return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse double in %s\n", name, + return ErrorAbort(state, kArgsParsingFailure, "%s: failed to parse double in %s", name, frac_str.c_str()); } @@ -902,7 +1121,8 @@ Value* GetPropFn(const char* name, State* state, const std::vector<std::unique_p // interprets 'file' as a getprop-style file (key=value pairs, one // 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, const std::vector<std::unique_ptr<Expr>>& argv) { +Value* FileGetPropFn(const char* name, State* state, + const std::vector<std::unique_ptr<Expr>>& argv) { if (argv.size() != 2) { return ErrorAbort(state, kArgsParsingFailure, "%s() expects 2 args, got %zu", name, argv.size()); @@ -968,7 +1188,8 @@ Value* FileGetPropFn(const char* name, State* state, const std::vector<std::uniq } // apply_patch_space(bytes) -Value* ApplyPatchSpaceFn(const char* name, State* state, const std::vector<std::unique_ptr<Expr>>& argv) { +Value* ApplyPatchSpaceFn(const char* name, State* state, + const std::vector<std::unique_ptr<Expr>>& argv) { if (argv.size() != 1) { return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 args, got %zu", name, argv.size()); @@ -981,115 +1202,15 @@ Value* ApplyPatchSpaceFn(const char* name, State* state, const std::vector<std:: 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(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, const std::vector<std::unique_ptr<Expr>>& argv) { - if (argv.size() < 6 || (argv.size() % 2) == 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s(): expected at least 6 args and an " - "even number, got %zu", name, argv.size()); - } - - std::vector<std::string> args; - if (!ReadArgs(state, argv, &args, 0, 4)) { - 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.c_str(), &target_size)) { - return ErrorAbort(state, kArgsParsingFailure, "%s(): can't parse \"%s\" as byte count", - name, target_size_str.c_str()); - } - - int patchcount = (argv.size()-4) / 2; - std::vector<std::unique_ptr<Value>> arg_values; - if (!ReadValueArgs(state, argv, &arg_values, 4, argv.size() - 4)) { - return nullptr; - } - - for (int i = 0; i < patchcount; ++i) { - if (arg_values[i * 2]->type != VAL_STRING) { - return ErrorAbort(state, kArgsParsingFailure, "%s(): sha-1 #%d is not string", name, - i * 2); - } - 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<std::string> patch_sha_str; - std::vector<std::unique_ptr<Value>> patches; - for (int i = 0; i < patchcount; ++i) { - 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.c_str(), target_filename.c_str(), - target_sha1.c_str(), target_size, - patch_sha_str, patches, nullptr); - - return StringValue(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, const std::vector<std::unique_ptr<Expr>>& argv) { - if (argv.size() < 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s(): expected at least 1 arg, got %zu", name, - argv.size()); - } - - std::vector<std::string> args; - if (!ReadArgs(state, argv, &args, 0, 1)) { - return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); - } - const std::string& filename = args[0]; - - std::vector<std::string> sha1s; - if (argv.size() > 1 && !ReadArgs(state, argv, &sha1s, 1, argv.size() - 1)) { - return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name); + return ErrorAbort(state, kArgsParsingFailure, "%s(): can't parse \"%s\" as byte count", name, + bytes_str.c_str()); } - 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, const std::vector<std::unique_ptr<Expr>>& argv) { - std::vector<std::string> args; - if (!ReadArgs(state, argv, &args)) { - return ErrorAbort(state, kArgsParsingFailure, "%s(): Failed to parse the argument(s)", name); + // Skip the cache size check if the update is a retry. + if (state->is_retry || CacheSizeCheck(bytes) == 0) { + return StringValue("t"); } - - std::string buffer = android::base::Join(args, ""); - uiPrint(state, buffer); - return StringValue(buffer); + return StringValue(""); } Value* WipeCacheFn(const char* name, State* state, const std::vector<std::unique_ptr<Expr>>& argv) { @@ -1139,51 +1260,6 @@ Value* RunProgramFn(const char* name, State* state, const std::vector<std::uniqu return StringValue(std::to_string(status)); } -// sha1_check(data) -// to return the sha1 of the data (given in the format returned by -// read_file). -// -// sha1_check(data, sha1_hex, [sha1_hex, ...]) -// returns the sha1 of the file if it matches any of the hex -// strings passed, or "" if it does not equal any of them. -// -Value* Sha1CheckFn(const char* name, State* state, const std::vector<std::unique_ptr<Expr>>& argv) { - if (argv.size() < 1) { - return ErrorAbort(state, kArgsParsingFailure, "%s() expects at least 1 arg", name); - } - - std::vector<std::unique_ptr<Value>> args; - if (!ReadValueArgs(state, 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 (argv.size() == 1) { - return StringValue(print_sha1(digest)); - } - - for (size_t i = 1; i < argv.size(); ++i) { - uint8_t arg_digest[SHA_DIGEST_LENGTH]; - 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, const std::vector<std::unique_ptr<Expr>>& argv) { |