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/*
* Copyright 2016, 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 "util.h"
#include <time.h>
#include <functional>
#include <string>
#include <utility>
#include <android-base/file.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include "protocol.h"
std::vector<std::string> get_command_line(pid_t pid) {
std::vector<std::string> result;
std::string cmdline;
android::base::ReadFileToString(android::base::StringPrintf("/proc/%d/cmdline", pid), &cmdline);
auto it = cmdline.cbegin();
while (it != cmdline.cend()) {
// string::iterator is a wrapped type, not a raw char*.
auto terminator = std::find(it, cmdline.cend(), '\0');
result.emplace_back(it, terminator);
it = std::find_if(terminator, cmdline.cend(), [](char c) { return c != '\0'; });
}
if (result.empty()) {
result.emplace_back("<unknown>");
}
return result;
}
std::string get_process_name(pid_t pid) {
std::string result = "<unknown>";
android::base::ReadFileToString(android::base::StringPrintf("/proc/%d/cmdline", pid), &result);
// We only want the name, not the whole command line, so truncate at the first NUL.
return result.c_str();
}
std::string get_thread_name(pid_t tid) {
std::string result = "<unknown>";
android::base::ReadFileToString(android::base::StringPrintf("/proc/%d/comm", tid), &result);
return android::base::Trim(result);
}
std::string get_timestamp() {
timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
tm tm;
localtime_r(&ts.tv_sec, &tm);
char buf[strlen("1970-01-01 00:00:00.123456789+0830") + 1];
char* s = buf;
size_t sz = sizeof(buf), n;
n = strftime(s, sz, "%F %H:%M", &tm), s += n, sz -= n;
n = snprintf(s, sz, ":%02d.%09ld", tm.tm_sec, ts.tv_nsec), s += n, sz -= n;
n = strftime(s, sz, "%z", &tm), s += n, sz -= n;
return buf;
}
bool iterate_tids(pid_t pid, std::function<void(pid_t)> callback) {
char buf[BUFSIZ];
snprintf(buf, sizeof(buf), "/proc/%d/task", pid);
std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(buf), closedir);
if (dir == nullptr) {
return false;
}
struct dirent* entry;
while ((entry = readdir(dir.get())) != nullptr) {
pid_t tid = atoi(entry->d_name);
if (tid == 0) {
continue;
}
if (pid != tid) {
callback(tid);
}
}
return true;
}
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