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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "sysdeps.h"
#include "adb_trace.h"
#include <string>
#include <unordered_map>
#include <vector>
#include <android-base/logging.h>
#include <android-base/strings.h>
#include "adb.h"
#if !ADB_HOST
#include <android-base/properties.h>
#endif
#if !ADB_HOST
const char* adb_device_banner = "device";
#if defined(__ANDROID__)
static android::base::LogdLogger gLogdLogger;
#endif
#else
const char* adb_device_banner = "host";
#endif
void AdbLogger(android::base::LogId id, android::base::LogSeverity severity,
const char* tag, const char* file, unsigned int line,
const char* message) {
android::base::StderrLogger(id, severity, tag, file, line, message);
#if defined(_WIN32)
// stderr can be buffered on Windows (and setvbuf doesn't seem to work), so explicitly flush.
fflush(stderr);
#endif
#if !ADB_HOST && defined(__ANDROID__)
// Only print logs of INFO or higher to logcat, so that `adb logcat` with adbd tracing on
// doesn't result in exponential logging.
if (severity >= android::base::INFO) {
gLogdLogger(id, severity, tag, file, line, message);
}
#endif
}
#if !ADB_HOST
static std::string get_log_file_name() {
struct tm now;
time_t t;
tzset();
time(&t);
localtime_r(&t, &now);
char timestamp[PATH_MAX];
strftime(timestamp, sizeof(timestamp), "%Y-%m-%d-%H-%M-%S", &now);
return android::base::StringPrintf("/data/adb/adb-%s-%d", timestamp,
getpid());
}
void start_device_log(void) {
int fd = unix_open(get_log_file_name(), O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0640);
if (fd == -1) {
return;
}
// Redirect stdout and stderr to the log file.
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
fprintf(stderr, "--- adb starting (pid %d) ---\n", getpid());
unix_close(fd);
}
#endif
int adb_trace_mask;
std::string get_trace_setting() {
#if ADB_HOST || !defined(__ANDROID__)
const char* setting = getenv("ADB_TRACE");
if (setting == nullptr) {
setting = "";
}
return setting;
#else
return android::base::GetProperty("persist.adb.trace_mask", "");
#endif
}
// Split the space separated list of tags from the trace setting and build the
// trace mask from it. note that '1' and 'all' are special cases to enable all
// tracing.
//
// adb's trace setting comes from the ADB_TRACE environment variable, whereas
// adbd's comes from the system property persist.adb.trace_mask.
static void setup_trace_mask() {
const std::string trace_setting = get_trace_setting();
if (trace_setting.empty()) {
return;
}
std::unordered_map<std::string, int> trace_flags = {{"1", -1},
{"all", -1},
{"adb", ADB},
{"sockets", SOCKETS},
{"packets", PACKETS},
{"rwx", RWX},
{"usb", USB},
{"sync", SYNC},
{"sysdeps", SYSDEPS},
{"transport", TRANSPORT},
{"jdwp", JDWP},
{"services", SERVICES},
{"auth", AUTH},
{"fdevent", FDEVENT},
{"shell", SHELL},
{"incremental", INCREMENTAL}};
std::vector<std::string> elements = android::base::Split(trace_setting, ", ");
for (const auto& elem : elements) {
const auto& flag = trace_flags.find(elem);
if (flag == trace_flags.end()) {
LOG(ERROR) << "Unknown trace flag: " << elem;
continue;
}
if (flag->second == -1) {
// -1 is used for the special values "1" and "all" that enable all
// tracing.
adb_trace_mask = ~0;
break;
} else {
adb_trace_mask |= 1 << flag->second;
}
}
if (adb_trace_mask != 0) {
android::base::SetMinimumLogSeverity(android::base::VERBOSE);
}
}
void adb_trace_init(char** argv) {
#if !ADB_HOST
// Don't open log file if no tracing, since this will block
// the crypto unmount of /data
if (!get_trace_setting().empty()) {
if (unix_isatty(STDOUT_FILENO) == 0) {
start_device_log();
}
}
#endif
#if ADB_HOST && !defined(_WIN32)
// adb historically ignored $ANDROID_LOG_TAGS but passed it through to logcat.
// If set, move it out of the way so that libbase logging doesn't try to parse it.
std::string log_tags;
char* ANDROID_LOG_TAGS = getenv("ANDROID_LOG_TAGS");
if (ANDROID_LOG_TAGS) {
log_tags = ANDROID_LOG_TAGS;
unsetenv("ANDROID_LOG_TAGS");
}
#endif
android::base::InitLogging(argv, &AdbLogger);
#if ADB_HOST && !defined(_WIN32)
// Put $ANDROID_LOG_TAGS back so we can pass it to logcat.
if (!log_tags.empty()) setenv("ANDROID_LOG_TAGS", log_tags.c_str(), 1);
#endif
setup_trace_mask();
VLOG(ADB) << adb_version();
}
void adb_trace_enable(AdbTrace trace_tag) {
adb_trace_mask |= (1 << trace_tag);
}
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