mirror of
https://github.com/RGBCube/serenity
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126 lines
4 KiB
C++
126 lines
4 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/JsonObject.h>
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#include <AK/JsonValue.h>
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#include <LibCore/DateTime.h>
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#include <LibCore/File.h>
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#include <LibCore/ProcessStatisticsReader.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <time.h>
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int main()
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{
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if (pledge("stdio rpath", nullptr) < 0) {
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perror("pledge");
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return 1;
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}
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if (unveil("/dev", "r") < 0) {
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perror("unveil");
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return 1;
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}
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if (unveil("/etc/passwd", "r") < 0) {
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perror("unveil");
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return 1;
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}
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if (unveil("/var/run/utmp", "r") < 0) {
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perror("unveil");
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return 1;
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}
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if (unveil("/proc", "r") < 0) {
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perror("unveil");
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return 1;
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}
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unveil(nullptr, nullptr);
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auto file_or_error = Core::File::open("/var/run/utmp", Core::IODevice::ReadOnly);
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if (file_or_error.is_error()) {
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warn() << "Error: " << file_or_error.error();
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return 1;
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}
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auto& file = *file_or_error.value();
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auto json = JsonValue::from_string(file.read_all());
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if (!json.has_value() || !json.value().is_object()) {
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warn() << "Error: Could not parse /var/run/utmp";
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return 1;
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}
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auto process_statistics = Core::ProcessStatisticsReader::get_all();
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auto now = time(nullptr);
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printf("\033[1m%-10s %-12s %-16s %-6s %s\033[0m\n",
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"USER", "TTY", "LOGIN@", "IDLE", "WHAT");
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json.value().as_object().for_each_member([&](auto& tty, auto& value) {
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const JsonObject& entry = value.as_object();
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auto uid = entry.get("uid").to_u32();
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auto pid = entry.get("pid").to_i32();
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(void)pid;
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auto login_time = Core::DateTime::from_timestamp(entry.get("login_at").to_number<time_t>());
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auto login_at = login_time.to_string("%b%d %H:%M:%S");
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auto* pw = getpwuid(uid);
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String username;
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if (pw)
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username = pw->pw_name;
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else
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username = String::number(uid);
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StringBuilder builder;
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String idle_string = "n/a";
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struct stat st;
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if (stat(tty.characters(), &st) == 0) {
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auto idle_time = now - st.st_mtime;
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if (idle_time >= 0) {
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builder.appendf("%ds", idle_time);
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idle_string = builder.to_string();
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}
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}
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String what = "n/a";
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for (auto& it : process_statistics) {
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if (it.value.tty == tty && it.value.pid == it.value.pgid)
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what = it.value.name;
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}
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printf("%-10s %-12s %-16s %-6s %s\n",
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username.characters(),
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tty.characters(),
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login_at.characters(),
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idle_string.characters(),
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what.characters());
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});
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return 0;
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}
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