1 /*
2 * Copyright 2016, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "util.h"
18
19 #include <time.h>
20
21 #include <string>
22 #include <utility>
23
24 #include <android-base/file.h>
25 #include <android-base/stringprintf.h>
26 #include <android-base/strings.h>
27 #include "protocol.h"
28
get_command_line(pid_t pid)29 std::vector<std::string> get_command_line(pid_t pid) {
30 std::vector<std::string> result;
31
32 std::string cmdline;
33 android::base::ReadFileToString(android::base::StringPrintf("/proc/%d/cmdline", pid), &cmdline);
34
35 auto it = cmdline.cbegin();
36 while (it != cmdline.cend()) {
37 // string::iterator is a wrapped type, not a raw char*.
38 auto terminator = std::find(it, cmdline.cend(), '\0');
39 result.emplace_back(it, terminator);
40 it = std::find_if(terminator, cmdline.cend(), [](char c) { return c != '\0'; });
41 }
42 if (result.empty()) {
43 result.emplace_back("<unknown>");
44 }
45
46 return result;
47 }
48
get_process_name(pid_t pid)49 std::string get_process_name(pid_t pid) {
50 std::string result = "<unknown>";
51 android::base::ReadFileToString(android::base::StringPrintf("/proc/%d/cmdline", pid), &result);
52 // We only want the name, not the whole command line, so truncate at the first NUL.
53 return result.c_str();
54 }
55
get_thread_name(pid_t tid)56 std::string get_thread_name(pid_t tid) {
57 std::string result = "<unknown>";
58 android::base::ReadFileToString(android::base::StringPrintf("/proc/%d/comm", tid), &result);
59 return android::base::Trim(result);
60 }
61
get_timestamp()62 std::string get_timestamp() {
63 timespec ts;
64 clock_gettime(CLOCK_REALTIME, &ts);
65
66 tm tm;
67 localtime_r(&ts.tv_sec, &tm);
68
69 char buf[strlen("1970-01-01 00:00:00.123456789+0830") + 1];
70 char* s = buf;
71 size_t sz = sizeof(buf), n;
72 n = strftime(s, sz, "%F %H:%M", &tm), s += n, sz -= n;
73 n = snprintf(s, sz, ":%02d.%09ld", tm.tm_sec, ts.tv_nsec), s += n, sz -= n;
74 n = strftime(s, sz, "%z", &tm), s += n, sz -= n;
75 return buf;
76 }
77