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authorTao Bao <tbao@google.com>2018-07-13 22:11:09 +0200
committerTao Bao <tbao@google.com>2018-07-20 20:26:17 +0200
commitd34e6bc44b0e58a3261cd7070a1525099932f205 (patch)
treeff7098efd4f91f323189d3a0fdf248df724bcfc1 /applypatch/applypatch_modes.cpp
parentMerge "Fix the arguments passed to getopt_long(3)." (diff)
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Diffstat (limited to 'applypatch/applypatch_modes.cpp')
-rw-r--r--applypatch/applypatch_modes.cpp261
1 files changed, 134 insertions, 127 deletions
diff --git a/applypatch/applypatch_modes.cpp b/applypatch/applypatch_modes.cpp
index ec95325fc..f130ea222 100644
--- a/applypatch/applypatch_modes.cpp
+++ b/applypatch/applypatch_modes.cpp
@@ -16,6 +16,7 @@
#include "applypatch_modes.h"
+#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -25,6 +26,7 @@
#include <string>
#include <vector>
+#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/parseint.h>
#include <android-base/strings.h>
@@ -33,157 +35,162 @@
#include "applypatch/applypatch.h"
#include "edify/expr.h"
-static int CheckMode(int argc, const char** argv) {
- if (argc < 3) {
- return 2;
- }
- std::vector<std::string> sha1;
- for (int i = 3; i < argc; i++) {
- sha1.push_back(argv[i]);
- }
-
- return applypatch_check(argv[2], sha1);
-}
-
-// Parse arguments (which should be of the form "<sha1>:<filename>" into the
-// new parallel arrays *sha1s and *files. Returns true on success.
-static bool ParsePatchArgs(int argc, const char** argv, std::vector<std::string>* sha1s,
- std::vector<FileContents>* files) {
- if (sha1s == nullptr) {
- return false;
- }
- for (int i = 0; i < argc; ++i) {
- std::vector<std::string> pieces = android::base::Split(argv[i], ":");
- if (pieces.size() != 2) {
- LOG(ERROR) << "Failed to parse patch argument \"" << argv[i] << "\"";
- return false;
- }
-
- uint8_t digest[SHA_DIGEST_LENGTH];
- if (ParseSha1(pieces[0], digest) != 0) {
- LOG(ERROR) << "Failed to parse SHA-1 \"" << argv[i] << "\"";
- return false;
- }
-
- sha1s->push_back(pieces[0]);
- FileContents fc;
- if (LoadFileContents(pieces[1].c_str(), &fc) != 0) {
- return false;
- }
- files->push_back(std::move(fc));
- }
- return true;
-}
-
-static int FlashMode(const char* src_filename, const char* tgt_filename,
- const char* tgt_sha1, size_t tgt_size) {
- return applypatch_flash(src_filename, tgt_filename, tgt_sha1, tgt_size);
+static int CheckMode(const std::string& target) {
+ return applypatch_check(target, {});
}
-static int PatchMode(int argc, const char** argv) {
- std::unique_ptr<Value> bonus;
- if (argc >= 3 && strcmp(argv[1], "-b") == 0) {
- FileContents bonus_fc;
- if (LoadFileContents(argv[2], &bonus_fc) != 0) {
- LOG(ERROR) << "Failed to load bonus file " << argv[2];
- return 1;
- }
- bonus = std::make_unique<Value>(Value::Type::BLOB,
- std::string(bonus_fc.data.cbegin(), bonus_fc.data.cend()));
- argc -= 2;
- argv += 2;
+static int FlashMode(const std::string& target_emmc, const std::string& source_file) {
+ std::vector<std::string> pieces = android::base::Split(target_emmc, ":");
+ if (pieces.size() != 4 || pieces[0] != "EMMC") {
+ return 2;
+ }
+ size_t target_size;
+ if (!android::base::ParseUint(pieces[2], &target_size) || target_size == 0) {
+ LOG(ERROR) << "Failed to parse \"" << pieces[2] << "\" as byte count";
+ return 1;
}
+ return applypatch_flash(source_file.c_str(), target_emmc.c_str(), pieces[3].c_str(), target_size);
+}
- if (argc < 4) {
+static int PatchMode(const std::string& target_emmc, const std::string& source_emmc,
+ const std::string& patch_file, const std::string& bonus_file) {
+ std::vector<std::string> target_pieces = android::base::Split(target_emmc, ":");
+ if (target_pieces.size() != 4 || target_pieces[0] != "EMMC") {
return 2;
}
size_t target_size;
- if (!android::base::ParseUint(argv[4], &target_size) || target_size == 0) {
- LOG(ERROR) << "Failed to parse \"" << argv[4] << "\" as byte count";
+ if (!android::base::ParseUint(target_pieces[2], &target_size) || target_size == 0) {
+ LOG(ERROR) << "Failed to parse \"" << target_pieces[2] << "\" as byte count";
return 1;
}
- // If no <src-sha1>:<patch> is provided, it is in flash mode.
- if (argc == 5) {
- if (bonus) {
- LOG(ERROR) << "bonus file not supported in flash mode";
- return 1;
- }
- return FlashMode(argv[1], argv[2], argv[3], target_size);
+ std::vector<std::string> source_pieces = android::base::Split(source_emmc, ":");
+ if (source_pieces.size() != 4 || source_pieces[0] != "EMMC") {
+ return 2;
}
- std::vector<std::string> sha1s;
- std::vector<FileContents> files;
- if (!ParsePatchArgs(argc - 5, argv + 5, &sha1s, &files)) {
- LOG(ERROR) << "Failed to parse patch args";
+ size_t source_size;
+ if (!android::base::ParseUint(source_pieces[2], &source_size) || source_size == 0) {
+ LOG(ERROR) << "Failed to parse \"" << source_pieces[2] << "\" as byte count";
return 1;
}
+ std::string contents;
+ if (!android::base::ReadFileToString(patch_file, &contents)) {
+ PLOG(ERROR) << "Failed to read patch file \"" << patch_file << "\"";
+ return 1;
+ }
std::vector<std::unique_ptr<Value>> patches;
- for (const auto& file : files) {
- patches.push_back(std::make_unique<Value>(Value::Type::BLOB,
- std::string(file.data.cbegin(), file.data.cend())));
+ patches.push_back(std::make_unique<Value>(Value::Type::BLOB, std::move(contents)));
+ std::vector<std::string> sha1s{ source_pieces[3] };
+
+ std::unique_ptr<Value> bonus;
+ if (!bonus_file.empty()) {
+ std::string bonus_contents;
+ if (!android::base::ReadFileToString(bonus_file, &bonus_contents)) {
+ PLOG(ERROR) << "Failed to read bonus file \"" << bonus_file << "\"";
+ return 1;
+ }
+ bonus = std::make_unique<Value>(Value::Type::BLOB, std::move(bonus_contents));
}
- return applypatch(argv[1], argv[2], argv[3], target_size, sha1s, patches, bonus.get());
+
+ return applypatch(source_emmc.c_str(), target_emmc.c_str(), target_pieces[3].c_str(), target_size,
+ sha1s, patches, bonus.get());
+}
+
+static void Usage() {
+ printf(
+ "Usage: \n"
+ "check mode\n"
+ " applypatch --check EMMC:<target-file>:<target-size>:<target-sha1>\n\n"
+ "flash mode\n"
+ " applypatch --flash <source-file>\n"
+ " --target EMMC:<target-file>:<target-size>:<target-sha1>\n\n"
+ "patch mode\n"
+ " applypatch [--bonus <bonus-file>]\n"
+ " --patch <patch-file>\n"
+ " --target EMMC:<target-file>:<target-size>:<target-sha1>\n"
+ " --source EMMC:<source-file>:<source-size>:<source-sha1>\n\n"
+ "show license\n"
+ " applypatch --license\n"
+ "\n\n");
}
-// This program (applypatch) applies binary patches to files in a way that
-// is safe (the original file is not touched until we have the desired
-// replacement for it) and idempotent (it's okay to run this program
-// multiple times).
-//
-// - if the sha1 hash of <tgt-file> is <tgt-sha1>, does nothing and exits
-// successfully.
-//
-// - otherwise, if no <src-sha1>:<patch> is provided, flashes <tgt-file> with
-// <src-file>. <tgt-file> must be a partition name, while <src-file> must
-// be a regular image file. <src-file> will not be deleted on success.
-//
-// - otherwise, if the sha1 hash of <src-file> is <src-sha1>, applies the
-// bsdiff <patch> to <src-file> to produce a new file (the type of patch
-// is automatically detected from the file header). If that new
-// file has sha1 hash <tgt-sha1>, moves it to replace <tgt-file>, and
-// exits successfully. Note that if <src-file> and <tgt-file> are
-// not the same, <src-file> is NOT deleted on success. <tgt-file>
-// may be the string "-" to mean "the same as src-file".
-//
-// - otherwise, or if any error is encountered, exits with non-zero
-// status.
-//
-// <src-file> (or <file> in check mode) may refer to an EMMC partition
-// to read the source data. See the comments for the
-// LoadPartitionContents() function for the format of such a filename.
-
-int applypatch_modes(int argc, const char** argv) {
- if (argc < 2) {
- usage:
+int applypatch_modes(int argc, char* argv[]) {
+ static constexpr struct option OPTIONS[]{
// clang-format off
- LOG(INFO) << "Usage: \n"
- << " " << argv[0] << " [-b <bonus-file>] <src-file> <tgt-file> <tgt-sha1> "
- "<tgt-size> [<src-sha1>:<patch> ...]\n"
- << " " << argv[0] << " -c <file> [<sha1> ...]\n"
- << " " << argv[0] << " -l\n"
- << "\n"
- << "Filenames may be of the form\n"
- << " EMMC:<partition>:<len_1>:<sha1_1>:<len_2>:<sha1_2>:...\n"
- << "to specify reading from or writing to an EMMC partition.\n\n";
+ { "bonus", required_argument, nullptr, 0 },
+ { "check", required_argument, nullptr, 0 },
+ { "flash", required_argument, nullptr, 0 },
+ { "license", no_argument, nullptr, 0 },
+ { "patch", required_argument, nullptr, 0 },
+ { "source", required_argument, nullptr, 0 },
+ { "target", required_argument, nullptr, 0 },
+ { nullptr, 0, nullptr, 0 },
// clang-format on
- return 2;
+ };
+
+ std::string check_target;
+ std::string source;
+ std::string target;
+ std::string patch;
+ std::string bonus;
+
+ bool check_mode = false;
+ bool flash_mode = false;
+ bool patch_mode = false;
+
+ optind = 1;
+
+ int arg;
+ int option_index;
+ while ((arg = getopt_long(argc, argv, "", OPTIONS, &option_index)) != -1) {
+ switch (arg) {
+ case 0: {
+ std::string option = OPTIONS[option_index].name;
+ if (option == "bonus") {
+ bonus = optarg;
+ } else if (option == "check") {
+ check_target = optarg;
+ check_mode = true;
+ } else if (option == "flash") {
+ source = optarg;
+ flash_mode = true;
+ } else if (option == "license") {
+ return ShowLicenses();
+ } else if (option == "patch") {
+ patch = optarg;
+ patch_mode = true;
+ } else if (option == "source") {
+ source = optarg;
+ } else if (option == "target") {
+ target = optarg;
+ }
+ break;
+ }
+ case '?':
+ default:
+ LOG(ERROR) << "Invalid argument";
+ Usage();
+ return 2;
+ }
}
- int result;
-
- if (strncmp(argv[1], "-l", 3) == 0) {
- result = ShowLicenses();
- } else if (strncmp(argv[1], "-c", 3) == 0) {
- result = CheckMode(argc, argv);
- } else {
- result = PatchMode(argc, argv);
+ if (check_mode) {
+ return CheckMode(check_target);
}
-
- if (result == 2) {
- goto usage;
+ if (flash_mode) {
+ if (!bonus.empty()) {
+ LOG(ERROR) << "bonus file not supported in flash mode";
+ return 1;
+ }
+ return FlashMode(target, source);
}
- return result;
+ if (patch_mode) {
+ return PatchMode(target, source, patch, bonus);
+ }
+
+ Usage();
+ return 2;
}