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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.
*/
#define TRACE_TAG TRACE_ADB
#include "sysdeps.h"
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
// We only build the affinity WAR code for Linux.
#if defined(__linux__)
#include <sched.h>
#endif
#include "base/file.h"
#include "base/logging.h"
#include "base/stringprintf.h"
#include "adb.h"
#include "adb_auth.h"
#include "adb_listeners.h"
#include "transport.h"
#if defined(WORKAROUND_BUG6558362) && defined(__linux__)
static const bool kWorkaroundBug6558362 = true;
#else
static const bool kWorkaroundBug6558362 = false;
#endif
static void adb_workaround_affinity(void) {
#if defined(__linux__)
const char affinity_env[] = "ADB_CPU_AFFINITY_BUG6558362";
const char* cpunum_str = getenv(affinity_env);
if (cpunum_str == nullptr || *cpunum_str == '\0') {
return;
}
char* strtol_res;
int cpu_num = strtol(cpunum_str, &strtol_res, 0);
if (*strtol_res != '\0') {
fatal("bad number (%s) in env var %s. Expecting 0..n.\n", cpunum_str,
affinity_env);
}
cpu_set_t cpu_set;
sched_getaffinity(0, sizeof(cpu_set), &cpu_set);
D("orig cpu_set[0]=0x%08lx\n", cpu_set.__bits[0]);
CPU_ZERO(&cpu_set);
CPU_SET(cpu_num, &cpu_set);
sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
sched_getaffinity(0, sizeof(cpu_set), &cpu_set);
D("new cpu_set[0]=0x%08lx\n", cpu_set.__bits[0]);
#else
// No workaround was ever implemented for the other platforms.
#endif
}
#if defined(_WIN32)
static const char kNullFileName[] = "NUL";
static BOOL WINAPI ctrlc_handler(DWORD type) {
exit(STATUS_CONTROL_C_EXIT);
return TRUE;
}
static std::string GetLogFilePath() {
const char log_name[] = "adb.log";
WCHAR temp_path[MAX_PATH];
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364992%28v=vs.85%29.aspx
DWORD nchars = GetTempPathW(arraysize(temp_path), temp_path);
if ((nchars >= arraysize(temp_path)) || (nchars == 0)) {
// If string truncation or some other error.
fatal("cannot retrieve temporary file path: %s\n",
SystemErrorCodeToString(GetLastError()).c_str());
}
return narrow(temp_path) + log_name;
}
#else
static const char kNullFileName[] = "/dev/null";
static std::string GetLogFilePath() {
return std::string("/tmp/adb.log");
}
#endif
static void close_stdin() {
int fd = unix_open(kNullFileName, O_RDONLY);
if (fd == -1) {
fatal("cannot open '%s': %s", kNullFileName, strerror(errno));
}
if (dup2(fd, STDIN_FILENO) == -1) {
fatal("cannot redirect stdin: %s", strerror(errno));
}
unix_close(fd);
}
static void setup_daemon_logging(void) {
const std::string log_file_path(GetLogFilePath());
int fd = unix_open(log_file_path.c_str(), O_WRONLY | O_CREAT | O_APPEND,
0640);
if (fd == -1) {
fatal("cannot open '%s': %s", log_file_path.c_str(), strerror(errno));
}
if (dup2(fd, STDOUT_FILENO) == -1) {
fatal("cannot redirect stdout: %s", strerror(errno));
}
if (dup2(fd, STDERR_FILENO) == -1) {
fatal("cannot redirect stderr: %s", strerror(errno));
}
unix_close(fd);
#ifdef _WIN32
// On Windows, stderr is buffered by default, so switch to non-buffered
// to match Linux.
setvbuf(stderr, NULL, _IONBF, 0);
#endif
fprintf(stderr, "--- adb starting (pid %d) ---\n", getpid());
}
int adb_main(int is_daemon, int server_port, int ack_reply_fd) {
HOST = 1;
#if defined(_WIN32)
SetConsoleCtrlHandler(ctrlc_handler, TRUE);
#else
signal(SIGPIPE, SIG_IGN);
#endif
init_transport_registration();
if (kWorkaroundBug6558362 && is_daemon) {
adb_workaround_affinity();
}
usb_init();
local_init(DEFAULT_ADB_LOCAL_TRANSPORT_PORT);
adb_auth_init();
std::string error;
std::string local_name = android::base::StringPrintf("tcp:%d", server_port);
if (install_listener(local_name, "*smartsocket*", nullptr, 0, &error)) {
LOG(FATAL) << "Could not install *smartsocket* listener: " << error;
}
// Inform our parent that we are up and running.
if (is_daemon) {
#if defined(_WIN32)
const HANDLE ack_reply_handle = cast_int_to_handle(ack_reply_fd);
const CHAR ack[] = "OK\n";
const DWORD bytes_to_write = arraysize(ack) - 1;
DWORD written = 0;
if (!WriteFile(ack_reply_handle, ack, bytes_to_write, &written, NULL)) {
fatal("adb: cannot write ACK to handle 0x%p: %s", ack_reply_handle,
SystemErrorCodeToString(GetLastError()).c_str());
}
if (written != bytes_to_write) {
fatal("adb: cannot write %lu bytes of ACK: only wrote %lu bytes",
bytes_to_write, written);
}
CloseHandle(ack_reply_handle);
#else
// TODO(danalbert): Can't use SendOkay because we're sending "OK\n", not
// "OKAY".
android::base::WriteStringToFd("OK\n", ack_reply_fd);
unix_close(ack_reply_fd);
#endif
close_stdin();
setup_daemon_logging();
}
D("Event loop starting\n");
fdevent_loop();
return 0;
}
#ifdef _WIN32
static bool _argv_is_utf8 = false;
#endif
int main(int argc, char** argv) {
#ifdef _WIN32
if (!_argv_is_utf8) {
fatal("_argv_is_utf8 is not set, suggesting that wmain was not "
"called. Did you forget to link with -municode?");
}
#endif
adb_sysdeps_init();
adb_trace_init(argv);
return adb_commandline(argc - 1, const_cast<const char**>(argv + 1));
}
#ifdef _WIN32
extern "C"
int wmain(int argc, wchar_t **argv) {
// Set diagnostic flag to try to detect if the build system was not
// configured to call wmain.
_argv_is_utf8 = true;
// Convert args from UTF-16 to UTF-8 and pass that to main().
NarrowArgs narrow_args(argc, argv);
return main(argc, narrow_args.data());
}
#endif
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